20090940 Ver 1_More Info Received_20091008

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OCT 19@20WA,
8 2009
DENR-WATER QUAUTy
KTIANDS AND StORA1WATER BRANCH
DUKE ENERGY
DAN RIVER COMBINED CYCLE PROJECT
STORM WATER MANAGEMENT PLAN
EDEN, ROCKINGHAM COUNTY, NC
SUBMITTED TO:
NCDENR DIVISION OF WATER QUALITY
2321 CRABTREE BLVD., SUITE 250
RALEIGH, NC 27604-2260
PREPARED BY:
jmmmWSPm SELLS
F-0891
128 Overhill Drive, Suite 105, Mooresville, NC 28117 %Itstoot #Ito
Phone: [phone] CA/? ( Asa
Fax: [phone]
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001
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DWQ USE ONLY
Date Received Fee Paid Permit Number
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FOP @R a V S
This form may be photocopied for use as an original
OC T 8 2009
1. GENERAL INFORMATION DENR - WATER QUALITY
WETLANDS AND STORMWATER BRANCH
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Duke Energy Carolinas, LLC
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Mark Landseidel
3. Mailing Address for person listed in item 2 above:
P.O. Box 1006
City:Charlotte State:NC Zip:28201
Phone: (704 ) 382-4759 Fax: (704 ) 382-5827
Email:[e-mail]
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Dan River Combined Cycle Project
5. Location of Project (street address):
900 South Edgewood Road
City:Eden
County:Rockingham Zip:27288
6. Directions to project (from nearest major intersection):
East 1.5 miles on Stadium Drive from the intersection of Van Buren Road (NC 14) and Stadium Drive Turn
south on Edeewood Road, plant is at the end of the road
7. Latitude:36029' 30" N Longitude:79° 42' 35" W of project
8. Contact person who can answer questions about the project:
Name:Robert Wylie Telephone Number: (704 ) 382-4669
Email:[e-mail]
II. PERMIT INFORMATION:
• 1. Specify whether project is (check one): ®New ?Renewal Modification
Form SWU-101 Version 09.25.08 Page 1 of4
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number and its issue date (if known)
3. Specify the type of project (check one):
• ®Low Density OHigh Density []Redevelop []General Permit []Universal SMP []Other
4. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
OCAMA Major ®Sedimentation/Erosion Control ®404/401 Permit ONPDES Industrial Stormwater
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Stormwater from the project will be treated by BMP #1 (Bioretention Area) and BMP#2 (Wet Detention Pond) the
post development peak flow for the 1-year and 10-year peak flow is equal to or less than the gredevelopment
flow. The BMP's will also treat the first inch of rainfall to 90 percent TSS Pollutant Removal Efficiency.
2. Stormwater runoff from this project drains to the Roanoke River basin.
3. Total Property Area: 377.79 acres 4. Total Coastal Wetlands Area: 0 acres
5. Total Property Area (3) - Total Coastal Wetlands Area (4) = Total Project Area**:377.79 acres
6. (Total Impervious Area / Total Project Area) X 100 = Project Built Upon Area (BUA):3.00 /o
7. How many drainage areas does the project have?2
8. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
For high density projects, com lete the table with one draina e area for each engineered stormwater device.
• Basin Information Drainage Area 1 Drainage Area 2
Receiving Stream Name Dan River Dan River
Stream Class & Index No. C 22 - (39) C 22 - (39)
Total Drainage Area (sf) 203,457 790,614
On-site Drainage Area (sf) 203,457 790,614
Off-site Drainage Area (so 0 0
Existing Impervious* Area (sf) 98,010 0
Proposed Impervious*Area (sf) 94,961 399,009.6
% Impervious* Area (total) 42.3 50.5
Impervious* Surface Area

E
On-site Buildings (sf) Drainage Area 1

66,646.8 Drainage Area 2

142,005.6
On-site Streets (sf) 28,314 254,826
On-site Parking (sf) 0 0
On-site Sidewalks (sf) 0 2,178
Other on-site (sf) 0 0
Off-site (sf) 0 0
Total (sf): 94,961 399,009.6
* Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
• **Total project area shall be calculated to exclude Coastal Wetlands from use when calculating the built upon area
percentage calculation. This is the area used to calculate overall percent project built upon area (BUA).
Form SWU-101 Version 09.25.08 Page 2 of 4
9. How was the off-site impervious area listed above derived?Existing features were from on-site survey and
proposed feature were supplied by Shaw.
Projects in Union County: Contact the DWQ Central Office staff to check to see if you project is located
within a Threatened & Endangered Species watershed that may be subject to more stringent stormwater
requirements.
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
One of the following property restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built-upon area for each lot must be provided as an attachment.
Forms can be downloaded from http://h2o.enr.state.nc.us/su/bmo forms htm - deed restrictions.
Form DRPC-1 High Density Commercial Subdivisions
Form DRPC-2 High Density Developments with Outparcels
Form DRPC-3 High Density Residential Subdivisions
Form DRPC-4 Low Density Commercial Subdivisions
Form DRPC-5 Low Density Residential Subdivisions
Form DRPC-6 Low Density Residential Subdivisions with Curb Outlets
By your signature below, you certify that the recorded property restrictions and protective covenants for this
project shall include all the applicable items required in the above form, that the covenants will be binding
on all parties and persons claiming under them, that they will run with the land, that the required covenants
cannot be changed or deleted without concurrence from the NC DWQ and that they will be recorded prior to
the sale of any lot.
• V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater Permitting Unit at [phone] for the status and
availability of these forms. Forms can be downloaded from http://,12o.enr.state.i-ic.us/suibmr) forms htm.
Form SW401-Low Density
Form SW401-Curb Outlet System
Form SW401-Off-Site System
Form SW401-Wet Detention Basin
Form SW401-Infiltration Basin
Form SW401-Infiltration Trench
Form SW401-Bioretention Cell
Form SW401-Level Spreader
Form SW401-Wetland
Form SW401-Grassed Swale
Form SW401-Sand Filter
Form SW401-Permeable Pavement
Form SW401-Cistern
•
Low Density Supplement
Curb Outlet System Supplement
Off-Site System Supplement
Wet Detention Basin Supplement
Infiltration Basin Supplement
Underground Infiltration Trench Supplement
Bioretention Cell Supplement
Level Spreader/Filter Strip/Restored Riparian Buffer Supplement
Constructed Wetland Supplement
Grassed Swale Supplement
Sand Filter Supplement
Permeable Pavement Supplement
Cistern Supplement
Form SWU-101 Version 09.25.08 Page 3 of 4
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the
interactive online map at http://h2o.enr.state.nc.us/su/mg_!Raps htin)
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
tials
• Original and one copy of the Stormwater Management Permit Application Form C
• Original and one copy of the Deed Restrictions & Protective Covenants Form (if WA
required as per Part IV above)
• Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP ?r
• Permit application processing fee of $505 (Express: $4,000 for HD, $2,000 for LD)
payable to NCDENR
• Calculations & detailed narrative description of stormwater treatment/management C
• Copy of any applicable soils report C
• Two copies of plans and specifications (sealed, signed & dated), including:
- Development/Project name
- Engineer and firm
- Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
• - Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off-site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf (such as additional information requests), please complete this section. (ex. designing engineer or firm)
Designated agent (individual or firm):Ionathan Carter of WSP Sells
Mailing Address:128 Overhill Drive, Suite 105
City:Mooresville State:NC Zip:28117
Phone: (704 ) 662-0100 Fax: (704 ) 662-0101
Email:[e-mail]
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 2) Mark Landseidel
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H .1000.
i Signature:
Date: 1-16-61
Form SWU-101 Version 09.25.08 Page 4 of 4
•
DUKE ENERGY
DAN RIVER COMBINED CYCLE PROJECT
STORM WATER MANAGEMENT PLAN
EDEN, ROCKINGHAM COUNTY, NC
SUBMITTED TO:
• NCDENR DIVISION OF WATER QUALITY
2321 CRABTREE BLVD., SUITE 250
RALEIGH, NC 27604-2260
PREPARED BY:
p?mmpWSP• SELLS
F-0891
128 Overhill Drive, Suite 105, Mooresville, NC 28117 a«««,««««««ar,,,P'
Phone: [phone] "o?'•S?0 ??ie?'<sr
Fax: [phone]
r
r
?i ? 'Msaew• • Q s Q?e
•
PROJECT NARRATIVE
The Duke Energy Dan River Steam Station in Eden, Rockingham County, NC will undergo a plant
expansion to include combined cycle combustion turbines. The project will require disturbance of
approximately 65 acres of the 378 acre facility.
Earthwork proposed for the project includes filling a 0.133 acre of wetland area. A 401 permit
(NCDENR DWQ) and 404 permit (US Army Corp. of Engineers) have been submitted.
The enclosed storm water management plan includes the entire plant expansion area which is
comprised of two general drainage areas: Drainage Area #1 and Drainage Area #2. In drainage area
#1 a bioretention area is proposed. Drainage area #2 will incorporate a wet detention pond. The
stockpile area within Drainage Area #3 will be established with vegetation as shown on the erosion
and sediment control plan. There is no impervious area proposed for the stockpile area, and the
runoff from this drainage area discharges into the existing ash basins.
The proposed BMP(s) are denoted as Bioretention Area #1 and Wet Pond #2 for the Plant Expansion
Area. The BMP(s) are designed in accordance with the North Carolina BMP Manual (2007 edition).
The bioretention area is designed for 85% TSS removal and the wet detention basin is designed for
90% TSS removal with a permanent pool minimum average depth of 3 feet.
• The hydrologic calculations include pre and post discharge rates for the 1-yr, 2-yr, 10-yr, 50-yr, and
100-yr, 24 hour events. These calculations are based upon SCS TR20 method using HydroCAD
computer modeling. The water quality drawdown is based upon the 1-inch storm event per the BMP
guidelines.
As shown in the calculations, the post development discharge rates are below predevelopment
discharge rates for the 1-yr, 2-yr, and 10-yr storm events. The emergency spillway is sized for the
100-yr storm event.
Soil testing was performed by S&ME, Inc. (see attached soil test reports). Temporary observation
wells were installed in the general areas of Bioretention Area #1 and Wet Pond 2. Based upon the
average depths to groundwater in the test locations, a seasonal high groundwater level was
determined for each of the wet detention ponds. The proposed excavated depths are a minimum 2
feet above the seasonal high groundwater in all areas.
The BMP(s) will be constructed after the site construction is completed and the site is stabilized in
accordance with the erosion and sediment control plan. Following construction of the BMP(s) and
establishment of vegetation, the BMP(s) will be maintained in accordance with the Operations and
Maintenance Agreements included in this Plan.

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
• Bioretention Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important operation and maintenance procedures:
- Immediately after the bioretention cell is established, the plants will be watered
twice weekly if needed until the plants become established (commonly six
weeks).
- Snow, mulch or any other material will NEVER be piled on the surface of the
bioretention cell.
- Heavy equipment will NEVER be driven over the bioretention cell.
- Special care will be taken to prevent sediment from entering the bioretention cell.
- Once a year, a soil test of the soil media will be conducted.
After the bioretention cell is established, I will inspect it once a month and within 24
hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of operation and maintenance will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element: Potential problems: How I will remediate the problem:
The entire BMP Trash/debris is resent. Remove the trash/debris.
The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to
bioretention cell erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
The inlet device: pipe, The pipe is clogged (if Unclog the pipe. Dispose of the
stone verge or swale applicable). sediment off-site.
The pipe is cracked or Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the Regrade the swale if necessary to
swale (if applicable). smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Stone verge is clogged or Remove sediment and clogged
covered in sediment (if stone and replace with clean stone.
applicable).
c:
Form SW401-Bioretention O&M-Rev.3 Page 1 of 4
E

•
BMP element: Potential problems: How I will remediate the problem:
The pretreatment area Flow is bypassing Regrade if necessary to route all
pretreatment area and/or flow to the pretreatment area.
gullies have formed. Restabilize the area after grading.
Sediment has accumulated to Search for the source of the
a depth greater than three sediment and remedy the problem if
inches. possible. Remove the sediment and
restabilize the pretreatment area.
Erosion has occurred. Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present. Remove the weeds, preferably by
hand.
The bioretention cell: Best professional practices Prune according to best professional
vegetation show that pruning is needed practices.
to maintain optimal plant
health.
Plants are dead, diseased or Determine the source of the
dying. problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Tree stakes/wires are present Remove tree stake/wires (which
six months after planting. can kill the tree if not removed).
The bioretention cell: Mulch is breaking down or Spot mulch if there are only random
soils and mulch has floated away. void areas. Replace whole mulch
layer if necessary. Remove the
remaining much and replace with
triple shredded hard wood mulch at
a maximum depth of three inches.
Soils and/or mulch are Determine the extent of the clogging
clogged with sediment. - remove and replace either just the
top layers or the entire media as
needed. Dispose of the spoil in an
appropriate off-site location. Use
triple shredded hard wood mulch at
a maximum depth of three inches.
Search for the source of the
sediment and remedy the problem if
possible.
An annual soil test shows that Dolomitic lime shall be applied as
pH has dropped or heavy recommended per the soil test and
metals have accumulated in toxic soils shall be removed,
the soil media. disposed of properly and replaced
with new lantin media.
Form SW401-Bioretention O&M-Rev.3 Page 2 of 4
.7
i
•
BMP element: Potential problems: How I will remediate the problem:
The underdrain system Clogging has occurred. Wash out the underdrain system.
(if applicable)
The drop inlet Clogging has occurred. Clean out the drop inlet. Dispose of
the sediment off-site.
The drop inlet is damaged Repair or replace the drop inlet.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality 401 Oversight Unit at 919-
outlet. 733-1786.
Form SW401-Bioretention O&M-Rev.3
Page 3 of 4
Permit Number:
(to be provided by DWQ)
• I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name:Dan River Combined Cycle Project
BMP drainage area number:Bioretention Area #1
Print name:Mark Landseidel
Title:General Manager
Address:P.O. Box 1006, Charlotte, NC 28201
Phone:[phone]
Signature:
Date: g -1 (?'- O g
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
• I, ??? 1 ?(?DD !Cf rr( , a Notary Public for the State of
1 'rtfi )r t j1A , County of &O2n ou of , do hereby certify that
trkh„(? ; ?j?o personally appeared before me this j?
day of A6 , and acknowledge the due execution of the
forgoing bioretention maintenance requirements. Witness my hand and official seal,
\?? ?, G;?o6nburg •. q?? ??i
• .fie ?? ? -?.
'???pe•;Northtoil ??•
SEAL
My commission expires 14, 96 11

Form SW40 I -Bioretention I&M-Rev. 2 Page 4 of 4
Permit Number:

is
(to be provided by DWQ)
Drainage Area Number:
Wet Detention Basin Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is provided.
This system (check one):
? does ® does not
This system (check one):
® does ? does not
incorporate a vegetated filter at the outlet.
incorporate pretreatment other than a forebay.
Important maintenance procedures:
Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
- If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
•
- Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and
within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a
Coastal County). Records of operation and maintenance should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element: Potential problem: How I will remediate the problem:
The entire BMP Trash/ debris is resent. Remove the trash/ debris.
The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to
detention basin erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Vegetation is too short or too Maintain vegetation at a height of
long. approximately six inches.
Form SW401-Wet Detention Basin O&M-Rev.4
Page 1 of 4
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
•
•
•
BMP element: Potential problem: How I will remediate the problem:
The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the
swale sediment off-site.
The pipe is cracked or Replace the pipe.
otherwise damaged.
Erosion is occurring in the Regrade the swale if necessary to
swale. smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay Sediment has accumulated to Search for the source of the
a depth greater than the sediment and remedy the problem if
original design depth for possible. Remove the sediment and
sediment storage. dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred. Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present. Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than s ra in .
The vegetated shelf Best professional practices Prune according to best professional
show that pruning is needed practices
to maintain optimal plant
health.
Plants are dead, diseased or Determine the source of the
dying. problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present. Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area Sediment has accumulated to Search for the source of the
a depth greater than the sediment and remedy the problem if
original design sediment possible. Remove the sediment and
storage depth. dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over Consult a professional to remove
50% of the area. and control the algal growth.
Cattails, phragmites or other Remove the plants by wiping them
invasive plants cover 50% of with pesticide (do not spray).
the basin surface.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
•
BMP element: Potential problem: How I will remediate the problem:
The embankment Shrubs have started to grow Remove shrubs immediately.
on the embankment.
Evidence of muskrat or Use traps to remove muskrats and
beaver activity is present. consult a professional to remove
beavers.
A tree has started to grow on Consult a dam safety specialist to
the embankment. remove the tree.
An annual inspection by an Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. if applicable)
The outlet device Clogging has occurred. Clean out the outlet device. Dispose
of the sediment off-site.
The outlet device is damaged Repair or replace the outlet device.
The receiving water Erosion or other signs of Contact the local NC Division of
damage have occurred at the Water Quality Regional Office, or
outlet. the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 529.50 feet in the main pond, the
sediment shall be removed.
When the permanent pool depth reads 532.25 feet in the forebay, the sediment
shall be removed.
BASIN DIAGRAM
ill in the blanks)
•
0 Permanent Pool Elevation 530.50
Sediment Removal . 532.25 /Pe anen Pool
- - - - - - - - - - - - - - - - Volume Sediment Removal Elevation 529.50 Volume
Bottom Elevatio 531.25 Min. --------------------------------------ediment Bottom Elevation 528.50 1-ft
Storage Sedimei
Storage
FOREBAY MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4
Page 3 of 4
Permit Number:
(to be provided by DWQ)
. I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name:Dan River Combined Cycle Project
BMP drainage area number: Wet Pond #2
Print name:Mark Landseidel
Title:General Manager
Address:P.O. Box 1006, Charlotte, NC 28201
Phone:[phone]
Signature:

Date: Ii- J(. O
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
I 'T. 60 ((L r? , a Notary Public for the State of
14 r 4i i r(f'i fin County of ftoelen hur , do hereby certify that
personally appeared before me this 164
day of 2ecl , and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
\\EV !a J,????
oii
?,ecWen6???00 ®
9 .
•m
r ?
0 0 i
SEAL

My commission expires at) /
Form SW401-Wet Detention Basin O&M-Rev.4
Page 4 of 4
Permit Number:
(to be provided by DWQ)
OF W ATF9
©. my 0? OG
WDENR
• STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
BIORETENTION CELL SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name Dan River Combined Cycle Project
Contact name Robert Wylie
Phone number 704-3824669
Date 10-Sep-09
Drainage area number Rain Garden #1
II. DESIGN INFORMATION `
Site Characteristics
Drainage area 203,457 ft2
Impervious area 86,142 ft2
Percent impervious 42.3% %
Design rainfall depth 1.0 inch
Peak Flow Calculations
Is pre/post control of the 1-yr, 24-hr peak flow required? Y (Y or N)
1-yr, 24-hr runoff depth 2.81 in
1-yr, 24-hr intensity 0.12 in/hr
Pre-development 1-yr, 24-hr peak flow 11.810 ft'/sec
Post-development 1-yr, 24-hr peak flow 11.540 ft'/sec
Pre/Post 1-yr, 24-hr peak control -0.270 ft' /sec
Storage Volume: Non-SA Waters
Minimum volume required 7,301.0 ft'
Volume provided 7,318.0 ft' OK
Storage Volume: SA Waters
1.5" runoff volume ft'
Pre-development 1-yr, 24-hr runoff ft3
Post-development 1-yr, 24-hr runoff ft3
Minimum volume required 0 ft3
Volume provided ft3
Cell Dimensions
Ponding depth of water 12 inches OK
Ponding depth of water 1.00 ft
Surface area of the top of the bioretention cell 7,635.0 ft2 OK
Length: ft
Width: ft
-or- Radius ft
Media and Soils Summary
Drawdown time, ponded volume 1 hr OK
Drawdown time, to 24 inches below surface hr
Drawdown time, total: 1 hr
In-situ soil:
Soil permeability 2.00 in/hr OK
Planting media soil:
Soil permeability 2.00 in/hr OK
Soil composition
% Sand (by weight) 86% OK
% Fines (by weight) 9% OK
% Organic (by weight) 5% OK
Total: 100%
Phosphorus Index (P-Index) of media (unitless)
Form SW401-Bioretention-Rev.8
July 30, 2009
Parts I and II. Design Summary, Page 1 of 2
Permit Number:
(to be provided by DWQ)
Basin Elevations
Temporary pool elevation 525.00 fmsl
Type of bioretention cell (answer "Y" to only one of the two
following questions):
. Is this a grassed cell? N (Y or N)
Is this a cell with trees/shrubs? Y (Y or N)
Planting elevation (top of the mulch or grass sod layer) 525 fmsl
Depth of mulch 4 inches
Bottom of the planting media soil 522 fmsl
Planting media depth 3 ft
Depth of washed sand below planting media soil 0.33 ft
Are underdrains being installed? N (Y or N)
How many clean out pipes are being installed?
What factor of safety is used for sizing the underdrains? (See
BMP Manual Section 12.3.6)
Additional distance between the bottom of the planting media and

the bottom of the cell to account for underdrains 0 ft
Bottom of the cell required 521.67 fmsl
SHWT elevation 518.8 fmsl
Distance from bottom to SHWT 2.87 ft
Internal Water Storage Zone (IWS)
Does the design include IWS N (Y or N)
Elevation of the top of the upturned elbow fmsl
Separation of IWS and Surface 525 ft
Planting Plan
Number of tree species 1
Number of shrub species 35
Number of herbaceous groundcover species 35
Additional Information
Does volume in excess of the design volume bypass the
bioretention cell? Y (Y or N)
Does volume in excess of the design volume flow evenly distributed
through a vegetated filter? Y (Y or N)
What is the length of the vegetated filter? 30 ft
OK media depth
OK
OK
OK
OK
OK
Does the design use a level spreader to evenly distribute flow? N (Y or N) Show how flow is evenly distributed.
Is the BMP located at least 30 feet from surface waters (50 feet if
SA waters)?
Is the BMP located at least 100 feet from water supply wells?
Are the vegetated side slopes equal to or less than 3:1?
Is the BMP located in a proposed drainage easement with access
to a public Right of Way (ROW)?
Inlet velocity (from treatment system)
Is the area surrounding the cell likely to undergo development in
the future?
Y (Y or N) OK
Y (Y or N) OK
Y (Y or N) OK
Y (Y or N) OK
1 fusec OK
N (Y or N) OK
Are the slopes draining to the bioretention cell greater than 20%? N (Y or N) OK
Is the drainage area permanently stabilized? Y (Y or N) OK
Pretreatment Used
(Indicate Type Used with an "X" in the shaded cell)
Gravel and grass
(81inches gravel followed by 3-5 ft of grass)
Grassed swale
Forebay
• Other
OK
A
Form SW401-Bioretention-Rev.8
July 30, 2009 Parts I and II. Design Summary, Page 2 of 2
Permit No:
(to be assigned by DWQ)
__-
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
• indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
In' 'als Sheet No.
1.0 1. Plans (1" - 50' or larger) of the entire site showing:
Design at ultimate build-out,
Off-site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Cell dimensions,
Pretreatment system,
High flow bypass system,
Maintenance access,
Recorded drainage easement and public right of way (ROW),
Clean out pipe locations,
Overflow device, and

C-74 Boundaries of drainage easement.
"
'
2. Plan details (1
= 30
or larger) for the bioretention cell showing:
Cell dimensions
Pretreatment system,
High flow bypass system,
Maintenance access,
Recorded drainage easement and public right of way (ROW),
Design at ultimate build-out,
Off-site drainage (if applicable),
Clean out pipe locations,
Overflow device, and
Boundaries of drainage easement.
•
C 7• -Indicate the P-Index between 10 and 30
"
'
3. Section view of the bioretention cell (1
= 20
or larger) showing:
Side slopes, 3:1 or lower
Underdrain system (if applicable), and
Bioretention cell layers (ground level and slope, pre-treatment, ponding depth, mulch depth, fill media
depth, washed sand, filter fabric (or choking stone if applicable), #57 stone, underdrains (if applicable),
SHWT level(s), and overflow structure]
CO 4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information. All
elevations shall be in feet mean sea level (fmsl). Results of soils tests of both the planting soil and the in
situ soil must include:
Soil permeability,
Soil composition (% sand, % fines, % organic), and
C _7.2 - x.
. 5. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing:
A variety of suitable species,
Sizes, spacing and locations of plantings,
Total quantity of each type of plant specified,
A planting detail,
The source nursery for the plants, and
Fertilizer and watering requirements to establish vegetation.
6. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
G?• C7 7. A construction sequence that shows how the bioretention cell will be protected from sediment until the
entire drainage area is stabilized.
. S 8. The supporting calculations (including underdrain calculations, if applicable).
9. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
10. A copy of the deed restriction.
Form SW401-Bioretention-Rev.7 Part III, Page 1 of 1
Bioretention facility (NCDENR BMP MANUAL 2007 CHAPTER 12)
Drainage Area (Ad) = 4.67 acres
Imperviouness (IA)= 42.3%
Rain Depth (Rd)= 1 inch
Runoff Volume by Shueler Method
Rv= 0.05+0.9*IA
= 0.43
V(1 inch)= 3630*Rp*Rv*A
WQV= 7,301
Surface Area Required
SA (ft)= WQV/d
SA (ft)= 7301.3
d = ponding depth (ft) = 1
Infiltration Rate of Media
Infiltration Rate- k (in/hr) = 2.0
Underdrain System Design (BMP Manual Section 5-7)
Q (cfs)=CIA 0.60xk x Ad
= 5.60
(Safety Factor of 10) Q (cfs)= 56.04
(Internal Slope) s = 0.50%
(roughness factor) n = 0.011
Diameter of Single Pipe D (inches) = 16 x Q x n
s 0.5
= 6.37
From Table 5-1
D is less than 6.66 use 4- 4" pipes
9
Precipitation Frequency Data Server Page 1 of 3
' POINT PRECIPITATION FREQUENCY ESTIMATES ??
FROM NOAA ATLAS 14 "? W'
EDEN, NORTH CAROLINA (31-2631) 36.4742 N 79.7433 W 498 feet
from "Precipitation-Frequency Atlas of the United States" NOAA Atlas 14, Volume 2, Version 3
G.M. Bonnin, D. Martin, B. Lin, T. Parzybok, M.Yekta, and D. Riley
NOAA, National Weather Service, Silver Spring, Maryland, 2004
Extracted: Thu Sep 10 2009
Confidence Limits Seasonality Location Maps Other Info. GIS data Maps Docs Return to State Map
•
•
Precipitation Frequency Estimates (inches)
ARI* [2j 10

min 15

min 3
0
F
min
60
--l
min
120
[
min

3 hr

6 hr
12
ht,

24 hr

48 hr

4 dom.

7 day

da

da
30
da
45
d--.y 1
60
1 da
=1 0.36 0.58 0.72 0.99 1.24 1.47 1.59 1.96 2.37 2.81 3.30 3.68 4.22 4.77 6.43 7.96 10.02 11.98
0 0.43 0.69 0.87 1.20 1.51 1.79 1.93 2.38 2.87 3.40 3.99 4.45 5.07 5.71 7.66 9.41 11.82 14.06
0 0.51 0.82 ].04 1.47 1.89 2.25 2.44 2.99 3.64 4.33 5.04 5.61 6.29 7.01 9.21 11.09 13.76 16.16
10 0.57 0.91 1.15 1.66 2.17 2.61 2.82 3.48 4.26 5.10 5.90 6.57 7.30 8.06 10.44 12.37 15.23 17.74
25 0.63 1.01 1.28 1.89 2.52 3.08 3.33 4.15 5.16 6.22 7.12 7.92 8.72 9.54 12.11 14.04 17.11 19.75
50 0.68 1.07 1.36 2.05 2.78 3.44 3.72 4.70 5.89 7.17 8.14 9.05 9.89 10.74 13.42 15.32 18.52 21.23
100 0.72 1.14 1.44 2.20 3.03 3.82 4.13 5.27 6.70 8.21 9.22 10.25 11.13 11.99 14.76 16.56 19.87 22.64
200 0.75 1.19 1.50 2.34 3.28 4.19 4.53 5.86 7.55 9.34 10.38 11.54 12.46 13.30 16.11 17.78 21.17 23.98
500 0.79 1.25 1.58 2.51 3.60 4.69 5.07 6.70 8.80 11.00 12.07 13.39 14.35 15.15 17.95 19.38 22.85 25.67
1000 92 1.29 1.62 2.63 3.84 5.08 5.48 7.36 9.82 941 13.46 HE HE 16.63 19.37 957 24.08 26.89

These precipitation frequency estimates are based on a partial duration series. ARI is the Average Recurrence Interval.
Please refer to NOAA Atlas 14 Document for more information. NOTE: Formatting forces estimates near zero to appear as zero.
The upper bound of the confidence interval at 90% confidence level is the value which 5% of the simulated quantile values for a given frequency are greater than.
° These precipitation frequency estimates are based on a partial duration series. ARI is the Average Recurrence Interval.
Please refer to NOAH Atlas 14 Document for more information. NOTE: Formatting prevents estimates near zero to appear as zero.
* Upper bound of the 90% confidence interval
Precipitation Frequency Estimates (inches)
ARI** 5 10 [XF1 0 60120 3 6 F 12 24 8 4 7 10 20 30 45 60
(years) min min min11 min min hr hr hr hr hr F ay day day 11 day 11 day 11 day 11 day
0.40 0.63 0.79 1.09 1.35 1.61 1.73 2.15 2.59 3.04 3.55 3.97 4.51 5.10 6.85 8.42 10.60 12.61
0.47 0.76 0.95 1.31 1.65 1.96 2.11 2.61 3.14 3.67 4.30 4.80 5.42 6.10 8.16 9.96 12.50 14.81
0 0.56 0.90 1.14 1.61 2.07 2.46 2.66 3.28 3.96 4.66 5.41 6.05 6.72 7.48 9.81 11.73 14.54 17.01
10 0.62 0.99 1.25 1.81 2.36 2.84 3.07 3.80 4.62 5.48 6.32 7.06 7.78 8.60 11.11 13.07 16.07 18.67
25 0.69 1.09 1.39 2.06 2.74 3.35 3.62 4.52 5.57 6.68 7.63 8.51 9.28 10.16 12.89 14.85 18.06 20.77
50 0.73 1.17 1.48 2.23 3.02 3.74 4.04 5.11 6.36 7.69 8.71 9.72 10.53 11.43 14.30 16.19 19.56 22.34
100 0.78 1.24 1.56 2.40 3.30 4.15 4.47 5.72 7.20 8.80 9.88 11.02 11.87 12.79 15.73 17.52 21.01 23.83
200 0.82 1.30 1.64 2.55 3.58 4.55 4.90 6.36 8.10 10.01 11.14 12.43 13.30 14.21 17.20 18.84 22.42 25.27
500 0.86 1.37 1.72 2.74 3.93 5.10 5.49 7.27 9.45 11.80 13.00 14.46 15.37 16.23 19.21 20.59 24.24 27.11
1000 0.90 1.41 1.77 2.87 4.19 5.53 5.95 7.99 10.55 13.34 14.55 16.16 17.08 17.88 20.79 21.93 25.61 28.46
The lower bound of the confidence interval at 90% confidence level is the value which 5% of the simulated quantile values for a given frequency are less than.
* Lower bound of the 90% confidence interval
Precipitation Frequency Estimates (inches)
ARI** 10 1? 30 60 120 3 6 12 24 48 4 10 20 30 45 60
11 min min min min min hr hr hr hr hr dy dday 11 day day day 11 day
0.33 0.53 0.66 0.91 1.13 1.35 1.46 1.80 2.18 2.61 3.08 3.43 3.96 4.48 6.05 7.54 9.48 11.39
0 0.40 0.63 0.80 1.10 1.38 1.64 1.78 2.19 2.64 3.16 3.72 4.15 4.75 5.37 7.21 8.91 11.18 13.37
0 0.47 0.75 0.95 1.35 1.73 2.06 2.24 2.74 3.33 4.02 4.70 5.23 5.89 6.58 8.66 10.49
- F13 01 15.36
FRO-] 70831E] 1.52 1.98 2.38 2.58 3.18 3.88 4.72 5.48 6.10 6.82 7.55 9.79 11.68 14.38 16.84
25 0.57 0.92 1.16 1.72 2.29 2.80 3.03 3.76 4.66 5.73 6.59 7.33 8.11 8.89 11.32 13.23 16.13 18.71
50 0.61 0.97 1.23 1.85 2.51 3.12 3.38 4.22 5.29 6.56 7.49 8.32 9.15 9.97 12.51 14.39 F17 .42 20.06
100 0.65 1.02 1.30 1.99 2.73 3.43 3.72 4.70 5.94 7.45 8.43 9.37 10.25 11.08 13.70 15.52 18.64 21.36
200 0.68 1.07 1.35 2.10 2.95 3.74 4.05 5.17 6.62 8.41 9.42 10.46 11.39 12.21 14.88 16.62 19.81 22.57
500 0.71 1.12 1741 2724 3.21 4.14 4.48 5.82 7.56 9.77 10.83 12.02 12.96 13.79 16.44 18.00 21.29 24.07
1000 0.73 1.14 1.44 2.33 3.39 4.44 4.80 6.30 8.30 10.89 11.96 13.27 14.24 15.02 17.64 19.03 22.35 25.13
http://dipper.nws.noaa. gov/cgi-binlhdsclbuildout.perl?type=pf&units=us&series=pd&state... 9/10/2009
E
•
•
D I
Pre
Subca# Reach on Link Drainage Diagram for Pond I Pre
Prepared by WSP SELLS, Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC
Pond-1-Pre
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 2
Area Listing (all nodes)
Area CN Description
(acres) (subcatchm ent-numbers)
8.890 74 >75% Grass cover, Good, HSG C (DA1)
2.250 98 Paved parking, HSG C (DA1)
11.140 TOTAL AREA
•
0
Pond-1-Pre
Prepared by WSP SELLS Printed 9/10/2009
• HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 3
Soil Listing (all nodes)
Area Soil Subcatchment
(acres) Goup Numbers
0.000 HSG A
0.000 HSG B
11.140 HSG C DA1
0.000 HSG D
0.000 Other
11.140 TOTAL AREA

0
Pond-1-Pre Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
. HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 4
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA1: Pre Runoff Area=11.140 ac 20.20% Impervious Runoff Depth=1.05"
Flow Length=414' Tc=22.4 min CN=79 Runoff=11.79 cfs 0.976 of
Total Runoff Area =11.140 ac Runoff Volume = 0.976 of Average Runoff Depth =1.05"
79.80% Pervious = 8.890 ac 20.20% Impervious = 2.250 ac
0
E
Pond-1-Pre Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 5
Summary for Subcatchment DA1: Pre
Runoff = 11.79 cfs @ 12.17 hrs, Volume= 0.976 af, Depth= 1.05"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 1 year Rainfall=2.81"
Area (ac) CN Description
2.250 98 Paved parking, HSG C
8.890 74 >75% Grass cover, Good, HSG C
11.140 79 Weighted Average
8.890 79.80% Pervious Area
2.250 20.20% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
21.8 249 0.0400 0.19 Sheet Flow,
Grass: Dense n= 0.240 P2= 3.40"
0.6 165 0.0900 4.83 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
22.4 414 Total
Subcatchment DA1: Pre
Hydrograph
13
'

12 -, -- ,- ----
----i?
11
10
9 ,
8
?
.
V. 7
3
6
LL
5
4
3
2
1
----- '
--- -I
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 4,10-4,12'',
0 42 44 46 48
Time (hours)

•
Pond-1-Pre Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 6
Hydrograph for Subcatchment DA1: Pre
•

Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.02 0.00 0.00
1.20 0.04 0.00 0.00
1.80 0.06 0.00 0.00
2.40 0.08 0.00 0.00
3.00 0.10 0.00 0.00
3.60 0.12 0.00 0.00
4.20 0.14 0.00 0.00
4.80 0.17 0.00 0.00
5.40 0.20 0.00 0.00
6.00 0.22 0.00 0.00
6.60 0.26 0.00 0.00
7.20 0.29 0.00 0.00
7.80 0.32 0.00 0.00
8.40 0.36 0.00 0.00
9.00 0.41 0.00 0.00
9.60 0.47 0.00 0.00
10.20 0.53 0.00 0.00
10.80 0.62 0.00 0.05
11.40 0.76 0.02 0.26
12.00 1.86 0.44 6.37
12.60 2.09 0.58 3.34
13.20 2.20 0.64 1.35
13.80 2.28 0.70 0.97
14.40 2.34 0.73 0.75
15.00 2.40 0.77 0.67
15.60 2.45 0.80 0.59
16.20 2.49 0.83 0.50
16.80 2.52 0.85 0.46
17.40 2.56 0.88 0.43
18.00 2.59 0.90 0.40
18.60 2.62 0.92 0.37
19.20 2.64 0.94 0.34
19.80 2.67 0.95 0.31
20.40 2.69 0.97 0.29
21.00 2.71 0.98 0.28
21.60 2.73 1.00 0.27
22.20 2.75 1.01 0.27
22.80 2.77 1.02 0.26
23.40 2.79 1.04 0.26
24.00 2.81 1.05 0.25
24.60 2.81 1.05 0.02
25.20 2.81 1.05 0.00
25.80 2.81 1.05 0.00
26.40 2.81 1.05 0.00
27.00 2.81 1.05 0.00
27.60 2.81 1.05 0.00
28.20 2.81 1.05 0.00
28.80 2.81 1.05 0.00
29.40 2.81 1.05 0.00
30.00 2.81 1.05 0.00
30.60 2.81 1.05 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 2.81 1.05 0.00
31.80 2.81 1.05 0.00
32.40 2.81 1.05 0.00
33.00 2.81 1.05 0.00
33.60 2.81 1.05 0.00
34.20 2.81 1.05 0.00
34.80 2.81 1.05 0.00
35.40 2.81 1.05 0.00
36.00 2.81 1.05 0.00
36.60 2.81 1.05 0.00
37.20 2.81 1.05 0.00
37.80 2.81 1.05 0.00
38.40 2.81 1.05 0.00
39.00 2.81 1.05 0.00
39.60 2.81 1.05 0.00
40.20 2.81 1.05 0.00
40.80 2.81 1.05 0.00
41.40 2.81 1.05 0.00
42.00 2.81 1.05 0.00
42.60 2.81 1.05 0.00
43.20 2.81 1.05 0.00
43.80 2.81 1.05 0.00
44.40 2.81 1.05 0.00
45.00 2.81 1.05 0.00
45.60 2.81 1.05 0.00
46.20 2.81 1.05 0.00
46.80 2.81 1.05 0.00
47.40 2.81 1.05 0.00
48.00 2.81 1.05 0.00
Pond-1-Pre Type// 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 7
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA1: Pre Runoff Area=11.140 ac 20.20% Impervious Runoff Depth=2.89"
Flow Length=414' Tc=22.4 min CN=79 Runoff=33.47 cfs 2.681 of
Total Runoff Area =11.140 ac Runoff Volume = 2.681 of Average Runoff Depth = 2.89"
79.80% Pervious = 8.890 ac 20.20% Impervious = 2.250 ac
•
0
Pond-1-Pre Type// 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 8
Summary for Subcatchment DA1: Pre
0
Runoff = 33.47 cfs @ 12.15 hrs, Volume= 2.681 af, Depth= 2.89"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 10 year Rainfall=5.10"
Area (ac) CN Description
2.250 98 Paved parking, HSG C
8.890 74 >75% Grass cover, Good, HSG C
11.140 79 Weighted Average
8.890 79.80% Pervious Area
2.250 20.20% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
21.8 249 0.0400 0.19 Sheet Flow,
Grass: Dense n= 0.240 P2= 3.40"
0.6 165 0.0900 4.83 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
22.4 414 Total
Subcatchment DA1: Pre
Hydrograph
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
E
•
Pond-1-Pre Type// 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 9
Hydrograph for Subcatchment DA1: Pre
•
•
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.03 0.00 0.00
1.20 0.06 0.00 0.00
1.80 0.10 0.00 0.00
2.40 0.14 0.00 0.00
3.00 0.18 0.00 0.00
3.60 0.22 0.00 0.00
4.20 0.26 0.00 0.00
4.80 0.31 0.00 0.00
5.40 0.35 0.00 0.00
6.00 0.41 0.00 0.00
6.60 0.46 0.00 0.00
7.20 0.53 0.00 0.00
7.80 0.59 0.00 0.02
8.40 0.66 0.01 0.08
9.00 0.75 0.02 0.19
9.60 0.85 0.03 0.31
10.20 0.97 0.06 0.49
10.80 1.13 0.11 0.86
11.40 1.38 0.21 1.70
12.00 3.38 1.47 20.57
12.60 3.79 1.80 8.49
13.20 4.00 1.96 3.22
13.80 4.14 2.08 2.27
14.40 4.25 2.17 1.75
15.00 4.35 2.25 1.54
15.60 4.44 2.32 1.35
16.20 4.51 2.39 1.15
16.80 4.58 2.44 1.05
17.40 4.64 2.49 0.99
18.00 4.70 2.54 0.92
18.60 4.75 2.59 0.84
19.20 4.80 2.63 0.77
19.80 4.84 2.67 0.70
20.40 4.88 2.70 0.64
21.00 4.92 2.73 0.62
21.60 4.96 2.77 0.61
22.20 4.99 2.80 0.59
22.80 5.03 2.83 0.58
23.40 5.07 2.86 0.57
24.00 5.10 2.89 0.55
24.60 5.10 2.89 0.04
25.20 5.10 2.89 0.00
25.80 5.10 2.89 0.00
26.40 5.10 2.89 0.00
27.00 5.10 2.89 0.00
27.60 5.10 2.89 0.00
28.20 5.10 2.89 0.00
28.80 5.10 2.89 0.00
29.40 5.10 2.89 0.00
30.00 5.10 2.89 0.00
30.60 5.10 2.89 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 5.10 2.89 0.00
31.80 5.10 2.89 0.00
32.40 5.10 2.89 0.00
33.00 5.10 2.89 0.00
33.60 5.10 2.89 0.00
34.20 5.10 2.89 0.00
34.80 5.10 2.89 0.00
35.40 5.10 2.89 0.00
36.00 5.10 2.89 0.00
36.60 5.10 2.89 0.00
37.20 5.10 2.89 0.00
37.80 5.10 2.89 0.00
38.40 5.10 2.89 0.00
39.00 5.10 2.89 0.00
39.60 5.10 2.89 0.00
40.20 5.10 2.89 0.00
40.80 5.10 2.89 0.00
41.40 5.10 2.89 0.00
42.00 5.10 2.89 0.00
42.60 5.10 2.89 0.00
43.20 5.10 2.89 0.00
43.80 5.10 2.89 0.00
44.40 5.10 2.89 0.00
45.00 5.10 2.89 0.00
45.60 5.10 2.89 0.00
46.20 5.10 2.89 0.00
46.80 5.10 2.89 0.00
47.40 5.10 2.89 0.00
48.00 5.10 2.89 0.00
Pond-1-Pre Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 10
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA1: Pre Runoff Area=11.140 ac 20.20% Impervious Runoff Depth=3.88"
Flow Length=414' Tc=22.4 min CN=79 Runoff=44.83 cfs 3.599 of
Total Runoff Area =11.140 ac Runoff Volume = 3.599 of Average Runoff Depth = 3.88"
79.80% Pervious = 8.890 ac 20.20% Impervious = 2.250 ac
•
0
•
Pond-1-Pre Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 11
Summary for Subcatchment DA1: Pre
•
Runoff = 44.83 cfs @ 12.15 hrs, Volume= 3.599 af, Depth= 3.88"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 25 year Rainfall=6.22"
Area (ac) CN Description
2.250 98 Paved parking, HSG C
8.890 74 >75% Grass cover, Good, HSG C
11.140 79 Weighted Average
8.890 79.80% Pervious Area
2.250 20.20% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
21.8 249 0.0400 0.19 Sheet Flow,
Grass: Dense n= 0.240 P2= 3.40"
0.6 165 0.0900 4.83 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fos
22.4 414 Total
Subcatchment DA1: Pre
Hydrograph
..
7-
50
® Runoff
48
44.83 cfs - - - - -
46 - - - - -
44 I -
Type II 24-hr Eden
42 - -
40 ... ..
25 Year
38
36 - - -- - --- -- --, --- Rainfall 6.23.x_
34
32 ;- - ::Runoff 11 140 ac=
30 -r - - - - r -r - -
F 28 _ .
26 - -- - - I?unoffNolume=3'5 of
24
22 - -
RllaAOff Depth 3,88..
EM: 20 - - - - -
18 - _ _ - FIow.LengWt 414
16 -
14 ,
- Tc=224min
12
10 -- r -- - - - - - - - -, --
r C,-N=-7-9-
8
6
---
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
0
C7
Pond-1-Pre Type Il 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 12
Hydrograph for Subcatchment DA1: Pre
C,
•
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.04 0.00 0.00
1.20 0.08 0.00 0.00
1.80 0.12 0.00 0.00
2.40 0.17 0.00 0.00
3.00 0.21 0.00 0.00
3.60 0.26 0.00 0.00
4.20 0.32 0.00 0.00
4.80 0.37 0.00 0.00
5.40 0.43 0.00 0.00
6.00 0.50 0.00 0.00
6.60 0.57 0.00 0.00
7.20 0.64 0.00 0.07
7.80 0.72 0.01 0.14
8.40 0.81 0.03 0.24
9.00 0.91 0.05 0.41
9.60 1.03 0.08 0.58
10.20 1.18 0.13 0.84
10.80 1.38 0.20 1.38
11.40 1.69 0.35 2.58
12.00 4.12 2.06 28.26
12.60 4.62 2.48 11.10
13.20 4.87 2.69 4.14
13.80 5.05 2.85 2.92
14.40 5.19 2.97 2.25
15.00 5.31 3.07 1.97
15.60 5.41 3.16 1.72
16.20 5.50 3.24 1.47
16.80 5.58 3.31 1.35
17.40 5.66 3.38 1.26
18.00 5.73 3.44 1.17
18.60 5.79 3.50 1.08
19.20 5.85 3.55 0.98
19.80 5.90 3.59 0.89
20.40 5.95 3.64 0.81
21.00 6.00 3.68 0.79
21.60 6.05 3.72 0.77
22.20 6.09 3.76 0.75
22.80 6.14 3.80 0.74
23.40 6.18 3.84 0.72
24.00 6.22 3.88 0.70
24.60 6.22 3.88 0.05
25.20 6.22 3.88 0.00
25.80 6.22 3.88 0.00
26.40 6.22 3.88 0.00
27.00 6.22 3.88 0.00
27.60 6.22 3.88 0.00
28.20 6.22 3.88 0.00
28.80 6.22 3.88 0.00
29.40 6.22 3.88 0.00
30.00 6.22 3.88 0.00
30.60 6.22 3.88 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 6.22 3.88 0.00
31.80 6.22 3.88 0.00
32.40 6.22 3.88 0.00
33.00 6.22 3.88 0.00
33.60 6.22 3.88 0.00
34.20 6.22 3.88 0.00
34.80 6.22 3.88 0.00
35.40 6.22 3.88 0.00
36.00 6.22 3.88 0.00
36.60 6.22 3.88 0.00
37.20 6.22 3.88 0.00
37.80 6.22 3.88 0.00
38.40 6.22 3.88 0.00
39.00 6.22 3.88 0.00
39.60 6.22 3.88 0.00
40.20 6.22 3.88 0.00
40.80 6.22 3.88 0.00
41.40 6.22 3.88 0.00
42.00 6.22 3.88 0.00
42.60 6.22 3.88 0.00
43.20 6.22 3.88 0.00
43.80 6.22 3.88 0.00
44.40 6.22 3.88 0.00
45.00 6.22 3.88 0.00
45.60 6.22 3.88 0.00
46.20 6.22 3.88 0.00
46.80 6.22 3.88 0.00
47.40 6.22 3.88 0.00
48.00 6.22 3.88 0.00
Pond-1-Pre Type 11 24-hr Eden 50 year Rainfall= 7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 13
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA1: Pre Runoff Area=11.140 ac 20.20% Impervious Runoff Depth=4.74"
Flow Length=414' Tc=22.4 min CN=79 Runoff=54.61 cfs 4.400 of
Total Runoff Area =11.140 ac Runoff Volume = 4.400 of Average Runoff Depth = 4.74"
79.80% Pervious = 8.890 ac 20.20% Impervious = 2.250 ac
•
.7
•
Pond-1-Pre Type// 24-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 14
Summary for Subcatchment DA1: Pre
•
Runoff = 54.61 cfs @ 12.15 hrs, Volume= 4.400 af, Depth= 4.74"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 50 year Rainfall=7.17"
Area (ac) CN Description
2.250 98 Paved parking, HSG C
8.890 74 >75% Grass cover, Good, HSG C
11.140 79 Weighted Average
8.890 79.80% Pervious Area
2.250 20.20% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
21.8 249 0.0400 0.19 Sheet Flow,
Grass: Dense n= 0.240 P2= 3.40"
0.6 165 0.0900 4.83 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
22.4 414 Total
Subcatchment DA1: Pre
Hydrograph
®Runoff
60 54.61 cf
s - -
55-
Type-44. 24-hr Eden.
50-
5Q year -
45 Rainfall...=7.1...7"
40
11..140 ac
N 35 ? Runofif Area ,
Runoff
Volume=4:400 of
3 30
------ ?---- Runoff depth=4:74---
LL i i
25
- - - --- - - - - Flow Length=414'--
20
Tc=22.4 min
15--
'
CN=79
10 5
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)

•
Pond _1_Pre Type 1124-hr Eden 50 year Rainfall= 7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 15
Hydrograph for Subcatchment DA1: Pre
•
•
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.04 0.00 0.00
1.20 0.09 0.00 0.00
1.80 0.14 0.00 0.00
2.40 0.19 0.00 0.00
3.00 0.25 0.00 0.00
3.60 0.30 0.00 0.00
4.20 0.36 0.00 0.00
4.80 0.43 0.00 0.00
5.40 0.50 0.00 0.00
6.00 0.57 0.00 0.01
6.60 0.65 0.01 0.08
7.20 0.74 0.01 0.17
7.80 0.83 0.03 0.27
8.40 0.93 0.05 0.39
9.00 1.05 0.09 0.62
9.60 1.19 0.13 0.84
10.20 1.36 0.20 1.17
10.80 1.59 0.30 1.86
11.40 1.95 0.49 3.37
12.00 4.75 2.59 34.94
12.60 5.33 3.09 13.32
13.20 5.62 3.34 4.93
13.80 5.82 3.52 3.47
14.40 5.98 3.66 2.67
15.00 6.12 3.79 2.34
15.60 6.24 3.89 2.04
16.20 6.34 3.99 1.74
16.80 6.44 4.07 1.59
17.40 6.52 4.15 1.48
18.00 6.60 4.22 1.38
18.60 6.68 4.29 1.27
19.20 6.75 4.35 1.16
19.80 6.81 4.41 1.05
20.40 6.86 4.46 0.96
21.00 6.92 4.51 0.93
21.60 6.97 4.56 0.91
22.20 7.02 4.60 0.89
22.80 7.07 4.65 0.87
23.40 7.12 4.70 0.85
24.00 7.17 4.74 0.83
24.60 7.17 4.74 0.06
25.20 7.17 4.74 0.00
25.80 7.17 4.74 0.00
26.40 7.17 4.74 0.00
27.00 7.17 4.74 0.00
27.60 7.17 4.74 0.00
28.20 7.17 4.74 0.00
28.80 7.17 4.74 0.00
29.40 7.17 4.74 0.00
30.00 7.17 4.74 0.00
30.60 7.17 4.74 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 7.17 4.74 0.00
31.80 7.17 4.74 0.00
32.40 7.17 4.74 0.00
33.00 7.17 4.74 0.00
33.60 7.17 4.74 0.00
34.20 7.17 4.74 0.00
34.80 7.17 4.74 0.00
35.40 7.17 4.74 0.00
36.00 7.17 4.74 0.00
36.60 7.17 4.74 0.00
37.20 7.17 4.74 0.00
37.80 7.17 4.74 0.00
38.40 7.17 4.74 0.00
39.00 7.17 4.74 0.00
39.60 7.17 4.74 0.00
40.20 7.17 4.74 0.00
40.80 7.17 4.74 0.00
41.40 7.17 4.74 0.00
42.00 7.17 4.74 0.00
42.60 7.17 4.74 0.00
43.20 7.17 4.74 0.00
43.80 7.17 4.74 0.00
44.40 7.17 4.74 0.00
45.00 7.17 4.74 0.00
45.60 7.17 4.74 0.00
46.20 7.17 4.74 0.00
46.80 7.17 4.74 0.00
47.40 7.17 4.74 0.00
48.00 7.17 4.74 0.00
Pond _1_Pre Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 16
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA1: Pre Runoff Area=11.140 ac 20.20% Impervious Runoff Depth=5.70"
Flow Length=414' Tc=22.4 min CN=79 Runoff=65.39 cfs 5.295 of
Total Runoff Area =11.140 ac Runoff Volume = 5.295 of Average Runoff Depth = 5.70"
79.80% Pervious = 8.890 ac 20.20% Impervious = 2.250 ac
•
r?
•
Pond-1-Pre Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 17
Summary for Subcatchment DA1: Pre
•
Runoff = 65.39 cfs @ 12.15 hrs, Volume= 5.295 af, Depth= 5.70"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 100 year Rainfall=8.21"
Area (ac) CN Description
2.250 98 Paved parking, HSG C
8.890 74 >75% Grass cover, Good, HSG C
11.140 79 Weighted Average
8.890 79.80% Pervious Area
2.250 20.20% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
21.8 249 0.0400 0.19 Sheet Flow,
Grass: Dense n= 0.240 P2= 3.40"
0.6 165 0.0900 4.83 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
22.4 414 Total
Subcatchment DA1: Pre
Hydrograph
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
0
•
Pond-1-Pre Type 1124-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 18
Hydrograph for Subcatchment DA1: Pre
•
is
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.05 0.00 0.00
1.20 0.10 0.00 0.00
1.80 0.16 0.00 0.00
2.40 0.22 0.00 0.00
3.00 0.28 0.00 0.00
3.60 0.35 0.00 0.00
4.20 0.42 0.00 0.00
4.80 0.49 0.00 0.00
5.40 0.57 0.00 0.01
6.00 0.66 0.01 0.09
6.60 0.75 0.02 0.19
7.20 0.85 0.03 0.31
7.80 0.95 0.06 0.43
8.40 1.06 0.09 0.58
9.00 1.21 0.14 0.87
9.60 1.37 0.20 1.14
10.20 1.56 0.28 1.55
10.80 1.82 0.42 2.41
11.40 2.23 0.66 4.27
12.00 5.44 3.19 42.35
12.60 6.10 3.77 15.76
13.20 6.43 4.07 5.79
13.80 6.67 4.28 4.06
14.40 6.85 4.45 3.12
15.00 7.01 4.59 2.73
15.60 7.14 4.72 2.39
16.20 7.26 4.82 2.04
16.80 7.37 4.92 1.86
17.40 7.47 5.02 1.73
18.00 7.56 5.10 1.61
18.60 7.65 5.18 1.48
19.20 7.72 5.25 1.36
19.80 7.79 5.32 1.23
20.40 7.86 5.38 1.12
21.00 7.92 5.43 1.09
21.60 7.98 5.49 1.06
22.20 8.04 5.55 1.04
22.80 8.10 5.60 1.01
23.40 8.16 5.65 0.99
24.00 8.21 5.70 0.96
24.60 8.21 5.70 0.07
25.20 8.21 5.70 0.00
25.80 8.21 5.70 0.00
26.40 8.21 5.70 0.00
27.00 8.21 5.70 0.00
27.60 8.21 5.70 0.00
28.20 8.21 5.70 0.00
28.80 8.21 5.70 0.00
29.40 8.21 5.70 0.00
30.00 8.21 5.70 0.00
30.60 8.21 5.70 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 8.21 5.70 0.00
31.80 8.21 5.70 0.00
32.40 8.21 5.70 0.00
33.00 8.21 5.70 0.00
33.60 8.21 5.70 0.00
34.20 8.21 5.70 0.00
34.80 8.21 5.70 0.00
35.40 8.21 5.70 0.00
36.00 8.21 5.70 0.00
36.60 8.21 5.70 0.00
37.20 8.21 5.70 0.00
37.80 8.21 5.70 0.00
38.40 8.21 5.70 0.00
39.00 8.21 5.70 0.00
39.60 8.21 5.70 0.00
40.20 8.21 5.70 0.00
40.80 8.21 5.70 0.00
41.40 8.21 5.70 0.00
42.00 8.21 5.70 0.00
42.60 8.21 5.70 0.00
43.20 8.21 5.70 0.00
43.80 8.21 5.70 0.00
44.40 8.21 5.70 0.00
45.00 8.21 5.70 0.00
45.60 8.21 5.70 0.00
46.20 8.21 5.70 0.00
46.80 8.21 5.70 0.00
47.40 8.21 5.70 0.00
48.00 8.21 5.70 0.00
•

DA1 -{? B_1
Post FOREBAY 1 G-1
Rain Garden

Subcat Reach on Link
Rain Garden-1-Post
Prepared by WSP SELLS Printed 9/10/2009
is HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 2
Area Listing (all nodes)
Area CN Description
(acres) (subcatchment-num bers)
2.700 74 >75% Grass cover, Good, HSG C (DA1)
0.440 98 Paved parking, HSG C (DA1)
1.530 98 Roofs, HSG C (DA1)
4.670 TOTAL AREA
is
0
Rain Garden 1 Post
Prepared by WS_P SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 3
Soil Listing (all nodes)
Area Soil Subcatchment
(acres) Goup Numbers
0.000
0.000
4.670
0.000
0.000
4.670
•
HSG A
HSG B
HSG C
HSG D
Other
DA1
TOTAL AREA
•

Rain Garden _1_Post Type 1124-hr Eden 1 year Rainfall=2.81"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 4
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA1: Post Runoff Area=4.670 ac 42.18% Impervious Runoff Depth=1.36"
Tc=5.0 min CN=84 Runoff=11.72 cfs 0.530 of
Pond FB-1: FOREBAY 1 Peak Elev=526.16' Storage=3,802 cf Inflow=11.72 cfs 0.530 of
Outflow=11.60 cfs 0.450 of
Pond RG-1: Rain Garden Peak Elev=525.09' Storage=8,019 cf Inflow=11.60 cfs 0.450 of
Outflow=1.38 cfs 0.282 of
Total Runoff Area = 4.670 ac Runoff Volume = 0.530 of Average Runoff Depth =1.36"
57.82% Pervious = 2.700 ac 42.18% Impervious =1.970 ac
lJ
0
Rain Garden-1-Post Type 1124-hr Eden 1 year Rainfall=2.81"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 5
Summary for Subcatchment DA1: Post
Runoff = 11.72 cfs @ 11.96 hrs, Volume= 0.530 af, Depth= 1.36"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 1 year Rainfall=2.81"
Area (ac) CN Description
0.440 98 Paved parking, HSG C
1.530 98 Roofs, HSG C
2.700 74 >75% Grass cover, Good, HSG C
4.670 84 Weighted Average
2.700 57.82% Pervious Area
1.970 42.18% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment DA1: Post
Hydrograph
--------- -- -- --------- --------
' ' ®Runoff
13
12 11.72 dg
I
- - - - - Type-11-24=hr,-Eden--
11 I II ? I I ? I
1 year
10 I I i I I
g I I I ,
Rainfa11'2'81 ;
Runoff Area
y --4.670 ac
I _ - I
Runoff, Volume
---- 0 of
LL 6 Runoff Depth=1.36"
5 -
' - - - _ _ - Tc_'_5,0 , min _
4
CN=84
3
I I I
I
2
I I
I
I I I I
1 ' I I I II ?
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
0
Rain Garden _1_Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 6
Hydrograph for Subcatchment DA1: Post
•
•
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.02 0.00 0.00
1.20 0.04 0.00 0.00
1.80 0.06 0.00 0.00
2.40 0.08 0.00 0.00
3.00 0.10 0.00 0.00
3.60 0.12 0.00 0.00
4.20 0.14 0.00 0.00
4.80 0.17 0.00 0.00
5.40 0.20 0.00 0.00
6.00 0.22 0.00 0.00
6.60 0.26 0.00 0.00
7.20 0.29 0.00 0.00
7.80 0.32 0.00 0.00
8.40 0.36 0.00 0.00
9.00 0.41 0.00 0.01
9.60 0.47 0.00 0.03
10.20 0.53 0.01 0.08
10.80 0.62 0.03 0.16
11.40 0.76 0.06 0.40
12.00 1.86 0.65 10.16
12.60 2.09 0.81 0.83
13.20 2.20 0.89 0.56
13.80 2.28 0.95 0.42
14.40 2.34 1.00 0.35
15.00 2.40 1.04 0.31
15.60 2.45 1.07 0.27
16.20 2.49 1.10 0.23
16.80 2.52 1.13 0.22
17.40 2.56 1.16 0.20
18.00 2.59 1.18 0.19
18.60 2.62 1.21 0.17
19.20 2.64 1.23 0.16
19.80 2.67 1.25 0.14
20.40 2.69 1.26 0.14
21.00 2.71 1.28 0.13
21.60 2.73 1.30 0.13
22.20 2.75 1.31 0.13
22.80 2.77 1.33 0.12
23.40 2.79 1.35 0.12
24.00 2.81 1.36 0.12
24.60 2.81 1.36 0.00
25.20 2.81 1.36 0.00
25.80 2.81 1.36 0.00
26.40 2.81 1.36 0.00
27.00 2.81 1.36 0.00
27.60 2.81 1.36 0.00
28.20 2.81 1.36 0.00
28.80 2.81 1.36 0.00
29.40 2.81 1.36 0.00
30.00 2.81 1.36 0.00
30.60 2.81 1.36 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 2.81 1.36 0.00
31.80 2.81 1.36 0.00
32.40 2.81 1.36 0.00
33.00 2.81 1.36 0.00
33.60 2.81 1.36 0.00
34.20 2.81 1.36 0.00
34.80 2.81 1.36 0.00
35.40 2.81 1.36 0.00
36.00 2.81 1.36 0.00
36.60 2.81 1.36 0.00
37.20 2.81 1.36 0.00
37.80 2.81 1.36 0.00
38.40 2.81 1.36 0.00
39.00 2.81 1.36 0.00
39.60 2.81 1.36 0.00
40.20 2.81 1.36 0.00
40.80 2.81 1.36 0.00
41.40 2.81 1.36 0.00
42.00 2.81 1.36 0.00
42.60 2.81 1.36 0.00
43.20 2.81 1.36 0.00
43.80 2.81 1.36 0.00
44.40 2.81 1.36 0.00
45.00 2.81 1.36 0.00
45.60 2.81 1.36 0.00
46.20 2.81 1.36 0.00
46.80 2.81 1.36 0.00
47.40 2.81 1.36 0.00
48.00 2.81 1.36 0.00
Rain Garden _1_Post Type// 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 7
Summary for Pond FBA: FOREBAY 1
Inflow Area = 4.670 ac, 42.18% Impervious, Inflow Depth = 1.36" for Eden 1 year event
Inflow = 11.72 cfs @ 11.96 hrs, Volume= 0.530 of
Outflow = 11.60 cfs @ 11.97 hrs, Volume= 0.450 af, Atten= 1 %, Lag= 0.2 min
Primary = 11.60 cfs @ 11.97 hrs, Volume= 0.450 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Peak Elev= 526.16' @ 11.97 hrs Surf.Area= 2,121 sf Storage= 3,802 cf
Plug-Flow detention time= 96.3 min calculated for 0.450 of (85% of inflow)
Center-of-Mass det. time= 26.4 min ( 858.0 - 831.5)
Volume Invert Avail.Storage Storage Description
#1 523.00' 5,829 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
523.00 386 0 0
524.00 864 625 625
525.00 1,413 1,139 1,764
526.00 2,018 1,716 3,479
527.00 2,681 2,350 5,829
Device Routing Invert Outlet Devices
#1 Primary 526.00' 70.0' long x 17.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Primary OutFlow Max=11.48 cfs @ 11.97 hrs HW=526.16' (Free Discharge)
L1=13road-Crested Rectangular Weir (Weir Controls 11.48 cfs @ 1.06 fps)
C
Rain Garden _1_Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
• HydroCAD® 9.00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 8
Pond FB-1: FOREBAY 1
Hydrograph
.77 7,.
13 - ¦ Inflow
Fl 172 - - ?r5, _
¦
I of ? Primary
12 1160 cfs - -- - IOW
Area=4VO-ac -
„ Peak E lev-52
10 6.16'
,
- - Sb Orage-_ 3,802 cf -
w
3
0 6-----,--- I -- --I- t ----- -- I - -- -
U. ,
5
q -- -- ---- '- - r - - r
3
r
r
•
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
Pond FBA: FOREBAY 1
Stage-Discharge
¦ Primary
w
°'
c
0
m
w
0
- -? .. - ivv Ilu izu 115U 14U 1b0 160 170 180
Discharge (cfs)
Rain Garden-1-Post Type 11 24-hr Eden
Prepared by WSP SELLS
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC 1 year Rainfall=2.81 "
Printed 9/10/2009
Page 9
Pond FBA: FOREBAY 1
Stage-Area-Storage
Surface/HorizontaUwetted Area (5q-ft)
0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 ? Surface
. . ¦ Storage
527
- -
526 - - - - - - - - - --
m
- - - --- - - - - - - - - - - - - - - - - - - - - - - -
- - - - -
0 525

w
524
523-
0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 5 ,400,
Storage (cubic-feet)

Rain Garden-1-Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 10
Hydrograph for Pond FB-1: FOREBAY 1
Time Inflow Storage Elevation Primary
(hours) (cfs) (cubic-feet) (feet) (cfs)
0.00 0.00 0 523.00 0.00
1.50 0.00 0 523.00 0.00
3.00 0.00 0 523.00 0.00
4.50 0.00 0 523.00 0.00
6.00 0.00 0 523.00 0.00
7.50 0.00 0 523.00 0.00
9.00 0.01 6 523.01 0.00
10.50 0.11 267 523.52 0.00
12.00 10.16 3,782 526.15 10.60
13.50 0.48 3,505 526.01 0.49
15.00 0.31 3,496 526.01 0.31
16.50 0.23 3,491 526.01 0.23
18.00 0.19 3,489 526.01 0.19
19.50 0.15 3,487 526.00 0.15
21.00 0.13 3,486 526.00 0.13
22.50 0.13 3,486 526.00 0.13
24.00 0.12 3,485 526.00 0.12
25.50 0.00 3,479 526.00 0.00
27.00 0.00 3,479 526.00 0.00
28.50 0.00 3,479 526.00 0.00
30.00 0.00 3,479 526.00 0.00
31.50 0.00 3,479 526.00 0.00
•
33.00 0.00 3,479 526.00 0.00
34.50 0.00 3,479 526.00 0.00
36.00 0.00 3,479 526.00 0.00
37.50 0.00 3,479 526.00 0.00
39.00 0.00 3,479 526.00 0.00
40.50 0.00 3,479 526.00 0.00
42.00 0.00 3,479 526.00 0.00
43.50 0.00 3,479 526.00 0.00
45.00 0.00 3,479 526.00 0.00
46.50 0.00 3,479 526.00 0.00
48.00 0.00 3,479 526.00 0.00

•
•
•
Rain Garden _1_Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 11
Elevation Primary
(feet) (cfs)
523.00 0.00
523.02 0.00
523.04 0.00
523.06 0.00
523.08 0.00
523.10 0.00
523.12 0.00
523.14 0.00
523.16 0.00
523.18 0.00
523.20 0.00
523.22 0.00
523.24 0.00
523.26 0.00
523.28 0.00
523.30 0.00
523.32 0.00
523.34 0.00
523.36 0.00
523.38 0.00
523.40 0.00
523.42 0.00
523.44 0.00
523.46 0.00
523.48 0.00
523.50 0.00
523.52 0.00
523.54 0.00
523.56 0.00
523.58 0.00
523.60 0.00
523.62 0.00
523.64 0.00
523.66 0.00
523.68 0.00
523.70 0.00
523.72 0.00
523.74 0.00
523.76 0.00
523.78 0.00
523.80 0.00
523.82 0.00
523.84 0.00
523.86 0.00
523.88 0.00
523.90 0.00
523.92 0.00
523.94 0.00
523.96 0.00
523.98 0.00
524.00 0.00
524.02 0.00
Stage-Discharge for Pond FBA: FOREBAY 1
Elevation Primary
(feet) (cfs)
524.04 0.00
524.06 0.00
524.08 0.00
524.10 0.00
524.12 0.00
524.14 0.00
524.16 0.00
524.18 0.00
524.20 0.00
524.22 0.00
524.24 0.00
524.26 0.00
524.28 0.00
524.30 0.00
524.32 0.00
524.34 0.00
524.36 0.00
524.38 0.00
524.40 0.00
524.42 0.00
524.44 0.00
524.46 0.00
524.48 0.00
524.50 0.00
524.52 0.00
524.54 0.00
524.56 0.00
524.58 0.00
524.60 0.00
524.62 0.00
524.64 0.00
524.66 0.00
524.68 0.00
524.70 0.00
524.72 0.00
524.74 0.00
524.76 0.00
524.78 0.00
524.80 0.00
524.82 0.00
524.84 0.00
524.86 0.00
524.88 0.00
524.90 0.00
524.92 0.00
524.94 0.00
524.96 0.00
524.98 0.00
525.00 0.00
525.02 0.00
525.04 0.00
525.06 0.00
Elevation Primary
(feet) (cfs)
525.08 0.00
525.10 0.00
525.12 0.00
525.14 0.00
525.16 0.00
525.18 0.00
525.20 0.00
525.22 0.00
525.24 0.00
525.26 0.00
525.28 0.00
525.30 0.00
525.32 0.00
525.34 0.00
525.36 0.00
525.38 0.00
525.40 0.00
525.42 0.00
525.44 0.00
525.46 0.00
525.48 0.00
525.50 0.00
525.52 0.00
525.54 0.00
525.56 0.00
525.58 0.00
525.60 0.00
525.62 0.00
525.64 0.00
525.66 0.00
525.68 0.00
525.70 0.00
525.72 0.00
525.74 0.00
525.76 0.00
525.78 0.00
525.80 0.00
525.82 0.00
525.84 0.00
525.86 0.00
525.88 0.00
525.90 0.00
525.92 0.00
525.94 0.00
525.96 0.00
525.98 0.00
526.00 0.00
526.02 0.53
526.04 1.50
526.06 2.76
526.08 4.24
526.10 5.93
Elevation Primary
(feet) (cfs)
526.12 7.80
526.14 9.83
526.16 12.01
526.18 14.33
526.20 16.78
526.22 19.37
526.24 22.09
526.26 24.93
526.28 27.88
526.30 30.94
526.32 34.11
526.34 37.39
526.36 40.76
526.38 44.24
526.40 47.81
526.42 51.44
526.44 55.16
526.46 58.97
526.48 62.85
526.50 66.82
526.52 70.87
526.54 75.00
526.56 79.20
526.58 83.48
526.60 87.84
526.62 92.06
526.64 96.34
526.66 100.66
526.68 105.04
526.70 109.46
526.72 113.93
526.74 118.44
526.76 123.00
526.78 127.59
526.80 132.23
526.82 137.17
526.84 142.16
526.86 147.22
526.88 152.32
526.90 157.49
526.92 162.70
526.94 167.97
526.96 173.30
526.98 178.67
527.00 184.10
•
Rain Garden-1-Post Type 1124-hr Eden 1 year Rainfall=2.81"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 12
Stage-Area-Storage for Pond FB-1: FOREBAY 1
•
•
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
523.00 386 0
523.05 410 20
523.10 434 41
523.15 458 63
523.20 482 87
523.25 506 111
523.30 529 137
523.35 553 164
523.40 577 193
523.45 601 222
523.50 625 253
523.55 649 285
523.60 673 318
523.65 697 352
523.70 721 387
523.75 745 424
523.80 768 462
523.85 792 501
523.90 816 541
523.95 840 582
524.00 864 625
524.05 891 669
524.10 919 714
524.15 946 761
524.20 974 809
524.25 1,001 858
524.30 1,029 909
524.35 1,056 961
524.40 1,084 1,015
524.45 1,111 1,069
524.50 1,139 1,126
524.55 1,166 1,183
524.60 1,193 1,242
524.65 1,221 1,303
524.70 1,248 1,364
524.75 1,276 1,427
524.80 1,303 1,492
524.85 1,331 1,558
524.90 1,358 1,625
524.95 1,386 1,694
525.00 1,413 1,764
525.05 1,443 1,835
525.10 1,474 1,908
525.15 1,504 1,982
525.20 1,534 2,058
525.25 1,564 2,136
525.30 1,594 2,215
525.35 1,625 2,295
525.40 1,655 2,377
525.45 1,685 2,461
525.50 1,716 2,546
525.55 1,746 2,632
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
525.60 1,776 2,720
525.65 1,806 2,810
525.70 1,837 2,901
525.75 1,867 2,993
525.80 1,897 3,087
525.85 1,927 3,183
525.90 1,957 3,280
525.95 1,988 3,379
526.00 2,018 3,479
526.05 2,051 3,581
526.10 2,084 3,684
526.15 2,117 3,789
526.20 2,151 3,896
526.25 2,184 4,004
526.30 2,217 4,114
526.35 2,250 4,226
526.40 2,283 4,339
526.45 2,316 4,454
526.50 2,350 4,571
526.55 2,383 4,689
526.60 2,416 4,809
526.65 2,449 4,931
526.70 2,482 5,054
526.75 21515 5,179
526.80 2,548 5,306
526.85 2,582 5,434
526.90 2,615 5,564
526.95 2,648 5,695
527.00 2,681 5,829
Rain Garden-1-Post Type// 24-hr Eden 9 year Rainfall=2.89"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 13
Summary for Pond RG-1: Rain Garden
Inflow Area = 4.670 ac, 42.18% Impervious, Inflow Depth = 1.16" for Eden 1 year event
Inflow = 11.60 cfs @ 11.97 hrs, Volume= 0.450 of
Outflow = 1.38 cfs @ 12.33 hrs, Volume= 0.282 af, Atten= 88%, Lag= 21.6 min
Primary = 1.38 cfs @ 12.33 hrs, Volume= 0.282 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Peak Elev= 525.09'@ 12.33 hrs Surf.Area= 7,915 sf Storage= 8,019 cf
Plug-Flow detention time= 219.6 min calculated for 0.282 of (63% of inflow)
Center-of-Mass det. time= 96.8 min ( 954.8 - 858.0)
Volume Invert Avail.Storage Storage Description
#1 524.00' 25,073 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
524.00 6,816 0 0
525.00 7,820 7,318 7,318
526.00 8,882 8,351 15,669
527.00 9,925 9,404 25,073
• Device Routing Invert Outlet Devices
#1 Primary 525.00' 20.0' long x 12.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.57 2.62 2.70 2.67 2.66 2.67 2.66 2.64
Primary OutFlow Max=1.37 cfs @ 12.33 hrs HW=525.09' (Free Discharge)
t1=13road-Crested Rectangular Weir (Weir Controls 1.37 cfs @ 0.77 fps)
0
•
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
Pond RGA: Rain Garden
Stage-Discharge
0
d
d
c
0
m
w
Primary
u Lu 40 60 80 100 120 140
Discharge (cfs)
Rain Garden-1-Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 15
Pond RG-1: Rain Garden
Stage-Area-Storage
Surface/Horizontal/Wetted Area (sq-ft)
1,000 2,000 3.000 4.000 5 nnn a nnn 7 nnn n nnn nnn
a?
m
c
0
m
w

0 Surface
® Storage
0
iv,uvu 1b,000 20,000 25,000
Storage (cubic-feet)
Rain Garden-1-Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 16
Hydrograph for Pond RG-1: Rain Garden
Time Inflow Storage Elevation Primary
(hours) (cfs) (cubic-feet) (feet) (cfs)
0.00 0.00 0 524.00 0.00
1.50 0.00 0 524.00 0.00
3.00 0.00 0 524.00 0.00
4.50 0.00 0 524.00 0.00
6.00 0.00 0 524.00 0.00
7.50 0.00 0 524.00 0.00
9.00 0.00 0 524.00 0.00
10.50 0.00 0 524.00 0.00
12.00 10.60 5,133 524.72 0.00
13.50 0.49 7,683 525.05 0.53
15.00 0.31 7,570 525.03 0.32
16.50 0.23 7,521 525.03 0.23
18.00 0.19 7,501 525.02 0.19
19.50 0.15 7,480 525.02 0.16
21.00 0.13 7,462 525.02 0.13
22.50 0.13 7,454 525.02 0.13
24.00 0.12 7,447 525.02 0.12
25.50 0.00 7,319 525.00 0.00
27.00 0.00 7,318 525.00 0.00
28.50 0.00 7,318 525.00 0.00
30.00 0.00 7,318 525.00 0.00
31.50 0.00 7,318 525.00 0.00
33.00 0.00 7,318 525.00 0.00
34.50 0.00 7,318 525.00 0.00
36.00 0.00 7,318 525.00 0.00
37.50 0.00 7,318 525.00 0.00
39.00 0.00 7,318 525.00 0.00
40.50 0.00 7,318 525.00 0.00
42.00 0.00 7,318 525.00 0.00
43.50 0.00 7,318 525.00 0.00
45.00 0.00 7,318 525.00 0.00
46.50 0.00 7,318 525.00 0.00
48.00 0.00 7,318 525.00 0.00
t?J
•
r-]

Rain Garden-1-Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 17
Elevation Primary
(feet) (cfs)
524.00 0.00
524.02 0.00
524.04 0.00
524.06 0.00
524.08 0.00
524.10 0.00
524.12 0.00
524.14 0.00
524.16 0.00
524.18 0.00
524.20 0.00
524.22 0.00
524.24 0.00
524.26 0.00
524.28 0.00
524.30 0.00
524.32 0.00
524.34 0.00
524.36 0.00
524.38 0.00
524.40 0.00
524.42 0.00
524.44 0.00
524.46 0.00
524.48 0.00
524.50 0.00
524.52 0.00
524.54 0.00
524.56 0.00
524.58 0.00
524.60 0.00
524.62 0.00
524.64 0.00
524.66 0.00
524.68 0.00
524.70 0.00
524.72 0.00
524.74 0.00
524.76 0.00
524.78 0.00
524.80 0.00
524.82 0.00
524.84 0.00
524.86 0.00
524.88 0.00
524.90 0.00
524.92 0.00
524.94 0.00
524.96 0.00
524.98 0.00
525.00 0.00
525.02 0.15
Stage-Discharge for Pond RG-1: Rain Garden
Elevation Primary
(feet) (cfs)
525.04 0.41
525.06 0.76
525.08 1.16
525.10 1.63
525.12 2.14
525.14 2.69
525.16 3.29
525.18 3.93
525.20 4.60
525.22 5.31
525.24 6.07
525.26 6.85
525.28 7.67
525.30 8.53
525.32 9.41
525.34 10.33
525.36 11.28
525.38 12.25
525.40 13.26
525.42 14.31
525.44 15.39
525.46 16.50
525.48 17.64
525.50 18.81
525.52 20.01
525.54 21.24
525.56 22.50
525.58 23.78
525.60 25.10
525.62 26.33
525.64 27.59
525.66 28.86
525.68 30.15
525.70 31.45
525.72 32.77
525.74 34.11
525.76 35.46
525.78 36.83
525.80 38.21
525.82 39.64
525.84 41.08
525.86 42.54
525.88 44.02
525.90 45.51
525.92 47.02
525.94 48.54
525.96 50.08
525.98 51.63
526.00 53.20
526.02 54.82
526.04 56.47
526.06 58.12
Elevation Primary
(feet) (cfs)
526.08 59.80
526.10 61.49
526.12 63.20
526.14 64.92
526.16 66.67
526.18 68.42
526.20 70.20
526.22 71.93
526.24 73.68
526.26 75.44
526.28 77.22
526.30 79.00
526.32 80.80
526.34 82.61
526.36 84.44
526.38 86.28
526.40 88.13
526.42 89.95
526.44 91.79
526.46 93.64
526.48 95.50
526.50 97.37
526.52 99.25
526.54 101.13
526.56 103.03
526.58 104.94
526.60 106.86
526.62 108.87
526.64 110.89
526.66 112.93
526.68 114.97
526.70 117.03
526.72 119.10
526.74 121.19
526.76 123.28
526.78 125.39
526.80 127.51
526.82 129.64
526.84 131.78
526.86 133.94
526.88 136.10
526.90 138.28
526.92 140.47
526.94 142.67
526.96 144.88
526.98 147.11
527.00 149.34
•
Rain Garden-1-Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 18
Stage-Area-Storage for Pond RGA: Rain Garden
•
•
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
524.00 6,816 0
524.05 6,866 342
524.10 6,916 687
524.15 6,967 1,034
524.20 7,017 1,383
524.25 7,067 1,735
524.30 7,117 2,090
524.35 7,167 2,447
524.40 7,218 2,807
524.45 7,268 3,169
524.50 7,318 3,534
524.55 7,368 3,901
524.60 7,418 4,270
524.65 7,469 4,642
524.70 7,519 5,017
524.75 7,569 5,394
524.80 7,619 5,774
524.85 7,669 6,156
524.90 7,720 6,541
524.95 7,770 6,928
525.00 7,820 7,318
525.05 7,873 7,710
525.10 7,926 8,105
525.15 7,979 8,503
525.20 8,032 8,903
525.25 8,086 9,306
525.30 8,139 9,712
525.35 8,192 10,120
525.40 8,245 10,531
525.45 8,298 10,945
525.50 8,351 11,361
525.55 8,404 11,780
525.60 8,457 12,201
525.65 8,510 12,625
525.70 8,563 13,052
525.75 8,617 13,482
525.80 8,670 13,914
525.85 8,723 14,349
525.90 8,776 14,786
525.95 8,829 15,226
526.00 8,882 15,669
526.05 8,934 16,114
526.10 8,986 16,562
526.15 9,038 17,013
526.20 9,091 17,466
526.25 9,143 17,922
526.30 9,195 18,381
526.35 9,247 18,842
526.40 9,299 19,305
526.45 9,351 19,772
526.50 9,404 20,240
526.55 9,456 20,712
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
526.60 9,508 21,186
526.65 9,560 21,663
526.70 9,612 22,142
526.75 9,664 22,624
526.80 9,716 23,108
526.85 9,769 23,595
526.90 9,821 24,085
526.95 9,873 24,578
527.00 9,925 25,073
0
•
Rain Garden-1-Post Type// 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 19
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA1: Post Runoff Area=4.670 ac 42.18% Impervious Runoff Depth=3.36"
Tc=5.0 min CN=84 Runoff=27.97 cfs 1.308 of
Pond FB-1: FOREBAY 1 Peak Elev=526.28' Storage=4,071 cf Inflow=27.97 cfs 1.308 of
Outflow=27.92 cfs 1.229 of
Pond RG-1: Rain Garden Peak Elev=525.61' Storage=12,258 cf Inflow=27.92 cfs 1.229 of
Outflow=25.50 cfs 1.061 of
Total Runoff Area = 4.670 ac Runoff Volume =1.308 of Average Runoff Depth = 3.36"
57.82% Pervious = 2.700 ac 42.18% Impervious =1.970 ac
0
Rain Garden-1-Post Type// 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
is HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 20
Summary for Subcatchment DA1: Post
Runoff = 27.97 cfs @ 11.96 hrs, Volume= 1.308 af, Depth= 3.36"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 10 year Rainfall=5.10"
Area (ac) CN Description
0.440 98 Paved parking, HSG C
1.530 98 Roofs, HSG C
2.700 74 >75% Grass cover, Good, HSG C
4.670 84 Weighted Average
2.700 57.82% Pervious Area
1.970 42.18% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment DA1: Post
Hydrograph
,..,.
0 2 4 6 8 10 12 14 16 18 210-2,12 2'4'-'2'6'-2'i8-
4 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
0
•
Rain Garden _1_Post Type// 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 21
Hydrograph for Subcatchment DA1: Post
•

Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.03 0.00 0.00
1.20 0.06 0.00 0.00
1.80 0.10 0.00 0.00
2.40 0.14 0.00 0.00
3.00 0.18 0.00 0.00
3.60 0.22 0.00 0.00
4.20 0.26 0.00 0.00
4.80 0.31 0.00 0.00
5.40 0.35 0.00 0.00
6.00 0.41 0.00 0.01
6.60 0.46 0.00 0.03
7.20 0.53 0.01 0.06
7.80 0.59 0.02 0.09
8.40 0.66 0.04 0.14
9.00 0.75 0.06 0.22
9.60 0.85 0.09 0.27
10.20 0.97 0.14 0.42
10.80 1.13 0.21 0.69
11.40 1.38 0.35 1.38
12.00 3.38 1.84 23.72
12.60 3.79 2.19 1.82
13.20 4.00 2.37 1.22
13.80 4.14 2.50 0.91
14.40 4.25 2.60 0.74
15.00 4.35 2.68 0.66
15.60 4.44 2.76 0.57
16.20 4.51 2.83 0.49
16.80 4.58 2.89 0.46
17.40 4.64 2.94 0.43
18.00 4.70 2.99 0.40
18.60 4.75 3.04 0.36
19.20 4.80 3.09 0.33
19.80 4.84 3.13 0.30
20.40 4.88 3.16 0.28
21.00 4.92 3.20 0.27
21.60 4.96 3.23 0.27
22.20 4.99 3.27 0.26
22.80 5.03 3.30 0.26
23.40 5.07 3.33 0.25
24.00 5.10 3.36 0.24
24.60 5.10 3.36 0.00
25.20 5.10 3.36 0.00
25.80 5.10 3.36 0.00
26.40 5.10 3.36 0.00
27.00 5.10 3.36 0.00
27.60 5.10 3.36 0.00
28.20 5.10 3.36 0.00
28.80 5.10 3.36 0.00
29.40 5.10 3.36 0.00
30.00 5.10 3.36 0.00
30.60 5.10 3.36 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 5.10 3.36 0.00
31.80 5.10 3.36 0.00
32.40 5.10 3.36 0.00
33.00 5.10 3.36 0.00
33.60 5.10 3.36 0.00
34.20 5.10 3.36 0.00
34.80 5.10 3.36 0.00
35.40 5.10 3.36 0.00
36.00 5.10 3.36 0.00
36.60 5.10 3.36 0.00
37.20 5.10 3.36 0.00
37.80 5.10 3.36 0.00
38.40 5.10 3.36 0.00
39.00 5.10 3.36 0.00
39.60 5.10 3.36 0.00
40.20 5.10 3.36 0.00
40.80 5.10 3.36 0.00
41.40 5.10 3.36 0.00
42.00 5.10 3.36 0.00
42.60 5.10 3.36 0.00
43.20 5.10 3.36 0.00
43.80 5.10 3.36 0.00
44.40 5.10 3.36 0.00
45.00 5.10 3.36 0.00
45.60 5.10 3.36 0.00
46.20 5.10 3.36 0.00
46.80 5.10 3.36 0.00
47.40 5.10 3.36 0.00
48.00 5.10 3.36 0.00
Rain Garden-1-Post Type// 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 22
Summary for Pond F13-1: FOREBAY 1
Inflow Area = 4.670 ac, 42.18% Impervious, Inflow Depth = 3.36" for Eden 10 year event
Inflow = 27.97 cfs @ 11.96 hrs, Volume= 1.308 of
Outflow = 27.92 cfs @ 11.96 hrs, Volume= 1.229 af, Atten= 0%, Lag= 0.2 min
Primary = 27.92 cfs @ 11.96 hrs, Volume= 1.229 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Peak Elev= 526.28'@ 11.96 hrs Surf.Area= 2,204 sf Storage= 4,071 cf
Plug-Flow detention time= 49.9 min calculated for 1.229 of (94% of inflow)
Center-of-Mass det. time= 15.8 min ( 821.6 - 805.7 )
Volume Invert Avail.Storage Storage Description
#1 523.00' 5,829 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
523.00 386 0 0
524.00 864 625 625
525.00 1,413 1,139 1,764
526.00 2,018 1,716 3,479
527.00 2,681 2,350 5,829
Device Routing Invert Outlet Devices
#1 Primary 526.00' 70.0' long x 17.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Primary OutFlow Max=27.51 cfs @ 11.96 hrs HW=526.28' (Free Discharge)
't1=Broad-Crested Rectangular Weir (Weir Controls 27.51 cfs @ 1.42 fps)
0
Rain Garden-1-Post Type 11 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 23

Pond FB-1: FOREBAY 1
Hydrograph
= = --- - -
IN Inflow

30 2Ze7 ae

I I
27.e2d5

?
Inflow Area=4
670-ac
O Primary
28 :
26 L
- - - r - - - -
.. - 6
v= 2--
Peak
E a
29 '
I

24

.
1 -
..
.
e
_.
-
-
I
- 1
22 I
Storage=4,071 cf

20
--,
1 -L - - - ----
-, - - ----- ----

H 18
w
- 1
..._.?. _ .. _I. __._... --,-_._...... .._ .. ..
?- 16
3
1
0 14
LL ---,- -1 - - - -- -. - - - - - - - - - - - - --
12 -
I , I
10

8 -- -'---

I ,
- - - - - --- - - - - -- -'-
-- -- - --

4 I 1 I
I ' I I ? 1

2 , , I I
0

0 2 4 6 8 10 12 14 16 ...
18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
Pond FB-1: FOREBAY 1
Stage-Discharge
527
? ?
I
,:, °
®Primary
r
1
I ,
I : I
I
ci?r?asf R. - - - - -
ed . qtari9u7ar Weir - -
526
I I ;
I I I I I 1

w ' I I
I I I I I i : , r I I ?i
I
0 525
?..
W ..

524 _ _ _ _ - - _ _ - _

1 L _ _ _.- _ _ _ _ - _ 1 - _ - - - _ _
. , -- --- , - - -

; -

1 I I
, I ? I 1
1 I
I
I I
523 • ,
0 10 20 30 40 50 60 70
80 90 100 110 120 130 140 150 160 170
180
Discharge (cfs)
Rain Garden_1_Post Type// 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 24
Pond FBA: FOREBAY 1
Stage-Area-Storage
Surface/HorizontalMetted Area (sq-ft)
0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 p Surface
® Storage
527
- - -, - - ;---- - - - - ---- -- - - -- ------:-,
526
---- ---- ----------- ------------ -------- ---------------------
0 525 '
d
W
- - -- -- ----- - - -- - -'-------------------------------- --'---
•
0ala`
0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 5,500
Storage (cubic-feet)
•
Rain Garden _1_Post Type 11 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 25
Hydrograph for Pond FB-1: FOREBAY 1
Time Inflow Storage Elevation Primary
(hours) (cfs) (cubic-feet) (feet) (cfs)
0.00 0.00 0 523.00 0.00
1.50 0.00 0 523.00 0.00
3.00 0.00 0 523.00 0.00
4.50 0.00 0 523.00 0.00
6.00 0.01 4 523.01 0.00
7.50 0.08 231 523.46 0.00
9.00 0.22 952 524.34 0.00
10.50 0.53 2,725 525.60 0.00
12.00 23.72 4,019 526.26 24.51
13.50 1.04 3,536 526.03 1.05
15.00 0.66 3,515 526.02 0.66
16.50 0.47 3,505 526.01 0.48
18.00 0.40 3,500 526.01 0.40
19.50 0.32 3,496 526.01 0.32
21.00 0.27 3,494 526.01 0.27
22.50 0.26 3,493 526.01 0.26
24.00 0.24 3,492 526.01 0.24
25.50 0.00 3,479 526.00 0.00
27.00 0.00 3,479 526.00 0.00
28.50 0.00 3,479 526.00 0.00
30.00 0.00 3,479 526.00 0.00
31.50 0.00 3,479 526.00 0.00
33.00 0.00 3,479 526.00 0.00
34.50 0.00 3,479 526.00 0.00
36.00 0.00 3,479 526.00 0.00
37.50 0.00 3,479 526.00 0.00
39.00 0.00 3,479 526.00 0.00
40.50 0.00 3,479 526.00 0.00
42.00 0.00 3,479 526.00 0.00
43.50 0.00 3,479 526.00 0.00
45.00 0.00 3,479 526.00 0.00
46.50 0.00 3,479 526.00 0.00
48.00 0.00 3,479 526.00 0.00
0

•
•
Rain Garden _1_Post Type 11 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 26
Elevation Primary
(feet) (cfs)
523.00 0.00
523.02 0.00
523.04 0.00
523.06 0.00
523.08 0.00
523.10 0.00
523.12 0.00
523.14 0.00
523.16 0.00
523.18 0.00
523.20 0.00
523.22 0.00
523.24 0.00
523.26 0.00
523.28 0.00
523.30 0.00
523.32 0.00
523.34 0.00
523.36 0.00
523.38 0.00
523.40 0.00
523.42 0.00
523.44 0.00
523.46 0.00
523.48 0.00
523.50 0.00
523.52 0.00
523.54 0.00
523.56 0.00
523.58 0.00
523.60 0.00
523.62 0.00
523.64 0.00
523.66 0.00
523.68 0.00
523.70 0.00
523.72 0.00
523.74 0.00
523.76 0.00
523.78 0.00
523.80 0.00
523.82 0.00
523.84 0.00
523.86 0.00
523.88 0.00
523.90 0.00
523.92 0.00
523.94 0.00
523.96 0.00
523.98 0.00
524.00 0.00
524.02 0.00
Stage-Discharge for Pond FB-1: FOREBAY 1
Elevation Primary
(feet) (cfs)
524.04 0.00
524.06 0.00
524.08 0.00
524.10 0.00
524.12 0.00
524.14 0.00
524.16 0.00
524.18 0.00
524.20 0.00
524.22 0.00
524.24 0.00
524.26 0.00
524.28 0.00
524.30 0.00
524.32 0.00
524.34 0.00
524.36 0.00
524.38 0.00
524.40 0.00
524.42 0.00
524.44 0.00
524.46 0.00
524.48 0.00
524.50 0.00
524.52 0.00
524.54 0.00
524.56 0.00
524.58 0.00
524.60 0.00
524.62 0.00
524.64 0.00
524.66 0.00
524.68 0.00
524.70 0.00
524.72 0.00
524.74 0.00
524.76 0.00
524.78 0.00
524.80 0.00
524.82 0.00
524.84 0.00
524.86 0.00
524.88 0.00
524.90 0.00
524.92 0.00
524.94 0.00
524.96 0.00
524.98 0.00
525.00 0.00
525.02 0.00
525.04 0.00
525.06 0.00
Elevation Primary
(feet) (cfs)
525.08 0.00
525.10 0.00
525.12 0.00
525.14 0.00
525.16 0.00
525.18 0.00
525.20 0.00
525.22 0.00
525.24 0.00
525.26 0.00
525.28 0.00
525.30 0.00
525.32 0.00
525.34 0.00
525.36 0.00
525.38 0.00
525.40 0.00
525.42 0.00
525.44 0.00
525.46 0.00
525.48 0.00
525.50 0.00
525.52 0.00
525.54 0.00
525.56 0.00
525.58 0.00
525.60 0.00
525.62 0.00
525.64 0.00
525.66 0.00
525.68 0.00
525.70 0.00
525.72 0.00
525.74 0.00
525.76 0.00
525.78 0.00
525.80 0.00
525.82 0.00
525.84 0.00
525.86 0.00
525.88 0.00
525.90 0.00
525.92 0.00
525.94 0.00
525.96 0.00
525.98 0.00
526.00 0.00
526.02 0.53
526.04 1.50
526.06 2.76
526.08 4.24
526.10 5.93
Elevation Primary
(feet) (cfs)
526.12 7.80
526.14 9.83
526.16 12.01
526.18 14.33
526.20 16.78
526.22 19.37
526.24 22.09
526.26 24.93
526.28 27.88
526.30 30.94
526.32 34.11
526.34 37.39
526.36 40.76
526.38 44.24
526.40 47.81
526.42 51.44
526.44 55.16
526.46 58.97
526.48 62.85
526.50 66.82
526.52 70.87
526.54 75.00
526.56 79.20
526.58 83.48
526.60 87.84
526.62 92.06
526.64 96.34
526.66 100.66
526.68 105.04
526.70 109.46
526.72 113.93
526.74 118.44
526.76 123.00
526.78 127.59
526.80 132.23
526.82 137.17
526.84 142.16
526.86 147.22
526.88 152.32
526.90 157.49
526.92 162.70
526.94 167.97
526.96 173.30
526.98 178.67
527.00 184.10
•
•
•
Rain Garden _1_Post Type // 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 27
Stage-Area-Storage for Pond FB-1: FOREBAY 1
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
523.00 386 0
523.05 410 20
523.10 434 41
523.15 458 63
523.20 482 87
523.25 506 111
523.30 529 137
523.35 553 164
523.40 577 193
523.45 601 222
523.50 625 253
523.55 649 285
523.60 673 318
523.65 697 352
523.70 721 387
523.75 745 424
523.80 768 462
523.85 792 501
523.90 816 541
523.95 840 582
524.00 864 625
524.05 891 669
524.10 919 714
524.15 946 761
524.20 974 809
524.25 1,001 858
524.30 1,029 909
524.35 1,056 961
524.40 1,084 1,015
524.45 1,111 1,069
524.50 1,139 1,126
524.55 1,166 1,183
524.60 1,193 1,242
524.65 1,221 1,303
524.70 1,248 1,364
524.75 1,276 1,427
524.80 1,303 1,492
524.85 1,331 1,558
524.90 1,358 1,625
524.95 1,386 1,694
525.00 1,413 1,764
525.05 1,443 1,835
525.10 1,474 1,908
525.15 1,504 1,982
525.20 1,534 2,058
525.25 1,564 2,136
525.30 1,594 2,215
525.35 1,625 2,295
525.40 1,655 2,377
525.45 1,685 2,461
525.50 1,716 2,546
525.55 1,746 2,632
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
525.60 1,776 2,720
525.65 1,806 2,810
525.70 1,837 2,901
525.75 1,867 2,993
525.80 1,897 3,087
525.85 1,927 3,183
525.90 1,957 3,280
525.95 1,988 3,379
526.00 2,018 3,479
526.05 2,051 3,581
526.10 2,084 3,684
526.15 2,117 3,789
526.20 2,151 3,896
526.25 2,184 4,004
526.30 2,217 4,114
526.35 2,250 4,226
526.40 2,283 4,339
526.45 2,316 4,454
526.50 2,350 4,571
526.55 2,383 4,689
526.60 2,416 4,809
526.65 2,449 4,931
526.70 2,482 5,054
526.75 2,515 5,179
526.80 2,548 5,306
526.85 2,582 5,434
526.90 2,615 5,564
526.95 2,648 5,695
527.00 2,681 5,829
Rain Garden _1Post Type ll 24-hr Eden 10 year Rainfall=5.10"
Prepared by WS_P SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 28
Summary for Pond RG-1: Rain Garden
Inflow Area = 4.670 ac, 42.18% Impervious, Inflow Depth = 3.16" for Eden 10 year event
Inflow = 27.92 cfs @ 11.96 hrs, Volume= 1.229 of
Outflow = 25.50 cfs @ 11.99 hrs, Volume= 1.061 af, Atten= 9%, Lag= 1.8 min
Primary = 25.50 cfs @ 11.99 hrs, Volume= 1.061 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Peak Elev= 525.61'@ 11.99 hrs Surf.Area= 8,464 sf Storage= 12,258 cf
Plug-Flow detention time= 91.4 min calculated for 1.060 of (86% of inflow)
Center-of-Mass det. time= 28.0 min ( 849.5 - 821.6 )
Volume Invert Avail.Storage Storage Description
#1 524.00' 25,073 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
524.00 6,816 0 0
525.00 7,820 7,318 7,318
526.00 8,882 8,351 15,669
527.00 9,925 9,404 25,073
Device Routing Invert Outlet Devices
#1 Primary 525.00' 20.0' long x 12.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.57 2.62 2.70 2.67 2.66 2.67 2.66 2.64
Primary OutFlow Max=25.25 cfs @ 11.99 hrs HW=525.60' (Free Discharge)
L1=Broad-Crested Rectangular Weir (Weir Controls 25.25 cfs @ 2.10 fps)

Rain Garden _1Post Type// 24-hr Eden 10 year Rainfall=5.10"
Prepared by WS_P SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 29
Pond RG-1: Rain Garden
Hydrograph
? I I I I I
I ' ¦ Inflow
27.92 cfs - - - '--L --- - - -- ® Primary
.
30 ,' I
28 _ _ Inflow'-Area=4.670 ac
---- ,- _ , - -
26 ? ? II ? _ _
25.50 cfs - - - - P+?ak.. E.lev-52
5.61:'
24
I _
Storage-12,258 cf
22 - -- -1-- ---- - - -- -
20 I- -I- _ I -I- - - - I --; --- -- - -II- ---
y 18
"- I i I I I_-_I
16
- - - -I - - : --r -- r -- --
3 - - - - - - - - - -
o 14 -
LL I I I I I
12
10 I I
_ _ _ - _.- _ - _ _ _ _ - _ _ - _ _ _
g
i
6
I I
4
I I I I

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
Pond RG-1: Rain Garden
Stage-Discharge
® Primary
m
m
c
0
m
w
0
0 20 40 60 80 100 120 140
Discharge (cfs)
Rain Garden _1_Post Type// 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 30
Pond RG-1: Rain Garden
Stage-Area-Storage
Surface/Horizonta[Metted Area (sq-ft)
1,000 2,000 3.000 4.000 5.000 6.000 7 000 A nnn a nnn
a?
m
c
0
m
w
•
0 Surface
¦ Storage
•
u o,uuu 1u,uuu 15,000 20,000 25,000
Storage (cubic-feet)
Rain Garden-1-Post Type 11 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 31
Hydrograph for Pond RG-1: Rain Garden
Time Inflow Storage Elevation Primary
(hours) (cfs) (cubic-feet) (feet) (cfs)
0.00 0.00 0 524.00 0.00
1.50 0.00 0 524.00 0.00
3.00 0.00 0 524.00 0.00
4.50 0.00 0 524.00 0.00
6.00 0.00 0 524.00 0.00
7.50 0.00 0 524.00 0.00
9.00 0.00 0 524.00 0.00
10.50 0.00 0 524.00 0.00
12.00 24.51 12,249 525.61 25.43
13.50 1.05 7,927 525.08 1.11
15.00 0.66 7,751 525.06 0.67
16.50 0.48 7,661 525.04 0.48
18.00 0.40 7,617 525.04 0.40
19.50 0.32 7,573 525.03 0.32
21.00 0.27 7,547 525.03 0.28
22.50 0.26 7,538 525.03 0.26
24.00 0.24 7,529 525.03 0.24
25.50 0.00 7,320 525.00 0.00
27.00 0.00 7,318 525.00 0.00
28.50 0.00 7,318 525.00 0.00
30.00 0.00 7,318 525.00 0.00
31.50 0.00 7,318 525.00 0.00
•
33.00 0.00 7,318 525.00 0.00
34.50 0.00 7,318 525.00 0.00
36.00 0.00 7,318 525.00 0.00
37.50 0.00 7,318 525.00 0.00
39.00 0.00 7,318 525.00 0.00
40.50 0.00 7,318 525.00 0.00
42.00 0.00 7,318 525.00 0.00
43.50 0.00 7,318 525.00 0.00
45.00 0.00 7,318 525.00 0.00
46.50 0.00 7,318 525.00 0.00
48.00 0.00 7,318 525.00 0.00
0
Rain Garden _1_Post Type// 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
• HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 32
•
L
Elevation Primary
(feet) (cfs)
524.00 0.00
524.02 0.00
524.04 0.00
524.06 0.00
524.08 0.00
524.10 0.00
524.12 0.00
524.14 0.00
524.16 0.00
524.18 0.00
524.20 0.00
524.22 0.00
524.24 0.00
524.26 0.00
524.28 0.00
524.30 0.00
524.32 0.00
524.34 0.00
524.36 0.00
524.38 0.00
524.40 0.00
524.42 0.00
524.44 0.00
524.46 0.00
524.48 0.00
524.50 0.00
524.52 0.00
524.54 0.00
524.56 0.00
524.58 0.00
524.60 0.00
524.62 0.00
524.64 0.00
524.66 0.00
524.68 0.00
524.70 0.00
524.72 0.00
524.74 0.00
524.76 0.00
524.78 0.00
524.80 0.00
524.82 0.00
524.84 0.00
524.86 0.00
524.88 0.00
524.90 0.00
524.92 0.00
524.94 0.00
524.96 0.00
524.98 0.00
525.00 0.00
525.02 0.15
Stage-Discharge for Pond RG-1: Rain Garden
Elevation Primary
(feet) (cfs)
525.04 0.41
525.06 0.76
525.08 1.16
525.10 1.63
525.12 2.14
525.14 2.69
525.16 3.29
525.18 3.93
525.20 4.60
525.22 5.31
525.24 6.07
525.26 6.85
525.28 7.67
525.30 8.53
525.32 9.41
525.34 10.33
525.36 11.28
525.38 12.25
525.40 13.26
525.42 14.31
525.44 15.39
525.46 16.50
525.48 17.64
525.50 18.81
525.52 20.01
525.54 21.24
525.56 22.50
525.58 23.78
525.60 25.10
525.62 26.33
525.64 27.59
525.66 28.86
525.68 30.15
525.70 31.45
525.72 32.77
525.74 34.11
525.76 35.46
525.78 36.83
525.80 38.21
525.82 39.64
525.84 41.08
525.86 42.54
525.88 44.02
525.90 45.51
525.92 47.02
525.94 48.54
525.96 50.08
525.98 51.63
526.00 53.20
526.02 54.82
526.04 56.47
526.06 58.12
Elevation Primary
(feet) (cfs)
526.08 59.80
526.10 61.49
526.12 63.20
526.14 64.92
526.16 66.67
526.18 68.42
526.20 70.20
526.22 71.93
526.24 73.68
526.26 75.44
526.28 77.22
526.30 79.00
526.32 80.80
526.34 82.61
526.36 84.44
526.38 86.28
526.40 88.13
526.42 89.95
526.44 91.79
526.46 93.64
526.48 95.50
526.50 97.37
526.52 99.25
526.54 101.13
526.56 103.03
526.58 104.94
526.60 106.86
526.62 108.87
526.64 110.89
526.66 112.93
526.68 114.97
526.70 117.03
526.72 119.10
526.74 121.19
526.76 123.28
526.78 125.39
526.80 127.51
526.82 129.64
526.84 131.78
526.86 133.94
526.88 136.10
526.90 138.28
526.92 140.47
526.94 142.67
526.96 144.88
526.98 147.11
527.00 149.34
•
0
•
Rain Garden-1-Post Type 11 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 33
Stage-Area-Storage for Pond RG-1: Rain Garden
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
524.00 6,816 0
524.05 6,866 342
524.10 6,916 687
524.15 6,967 1,034
524.20 7,017 1,383
524.25 7,067 1,735
524.30 7,117 2,090
524.35 7,167 2,447
524.40 7,218 2,807
524.45 7,268 3,169
524.50 7,318 3,534
524.55 7,368 3,901
524.60 7,418 4,270
524.65 7,469 4,642
524.70 7,519 5,017
524.75 7,569 5,394
524.80 7,619 5,774
524.85 7,669 6,156
524.90 7,720 6,541
524.95 7,770 6,928
525.00 7,820 7,318
525.05 7,873 7,710
525.10 7,926 8,105
525.15 7,979 8,503
525.20 8,032 8,903
525.25 8,086 9,306
525.30 8,139 9,712
525.35 8,192 10,120
525.40 8,245 10,531
525.45 8,298 10,945
525.50 8,351 11,361
525.55 8,404 11,780
525.60 8,457 12,201
525.65 8,510 12,625
525.70 8,563 13,052
525.75 8,617 13,482
525.80 8,670 13,914
525.85 8,723 14,349
525.90 8,776 14,786
525.95 8,829 15,226
526.00 8,882 15,669
526.05 8,934 16,114
526.10 8,986 16,562
526.15 9,038 17,013
526.20 9,091 17,466
526.25 9,143 17,922
526.30 9,195 18,381
526.35 9,247 18,842
526.40 9,299 19,305
526.45 9,351 19,772
526.50 9,404 20,240
526.55 9,456 20,712
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
526.60 9,508 21,186
526.65 9,560 21,663
526.70 9,612 22,142
526.75 9,664 22,624
526.80 9,716 23,108
526.85 9,769 23,595
526.90 9,821 24,085
526.95 9,873 24,578
527.00 9,925 25,073
Rain Garden _1_Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 34
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA1: Post Runoff Area=4.670 ac 42.18% Impervious Runoff Depth=4.40"
Tc=5.0 min CN=84 Runoff=36.06 cfs 1.713 of
Pond FB-1: FOREBAY 1 Peak Elev=526.33' Storage=4,185 cf Inflow=36.06 cfs 1.713 of
Outflow=36.03 cfs 1.634 of
Pond RG-1: Rain Garden Peak Elev=525.73' Storage=13,290 cf Inflow=36.03 cfs 1.634 of
Outflow=33.28 cfs 1.466 of
Total Runoff Area = 4.670 ac Runoff Volume =1.713 of Average Runoff Depth = 4.40"
57.82% Pervious = 2.700 ac 42.18% Impervious =1.970 ac
E
0
•
Rain Garden-1-Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 35
Summary for Subcatchment DA1: Post
Runoff = 36.06 cfs @ 11.96 hrs, Volume= 1.713 af, Depth= 4.40"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 25 year Rainfall=6.22"
Area (ac) CN Description
0.440 98 Paved parking, HSG C
1.530 98 Roofs, HSG C
2.700 74 >75% Grass cover, Good, HSG C
4.670 84 Weighted Average
2.700 57.82% Pervious Area
1.970 42.18% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment DA1: Post
•
Hydrograph
-------- -- -------- -----'--------------- -- ----------- -------------
-- - -
Runoff
36 - - - - - -i 36.06 _ _ _ - - _ _ _ _ _ _ _ _. _ _ - - - _
- ? ---
36 --- - -- ---; - -- -- - TYPell24-hr Eden--
34 -- --- ----- - ----- ---- -- - - ------ -------'---'-- -
32 1-1 ----I-- --'- --- --- - - - - -- -- 25 _year -
30 -- L - -- °- --'-- -L - -
-- --fZainfall-=6:22"--
zs -- -- L-- -- -- ---'--
26 -Run6ff area=4.670 ac-
24 L _ _ ... _ ._.._ _
22
-- Runoff V'
olume=1:11 a#
3 20
LL 18 Runoff Depth=4,40
16
14 - - '_.._ - -- - - 0 min_
12
CN=84 _
10
a
s - -
a -
i
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
0

Rain Garden _1Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WS_P SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 36
Hydrograph for Subcatchment DA1: Post
•

Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.04 0.00 0.00
1.20 0.08 0.00 0.00
1.80 0.12 0.00 0.00
2.40 0.17 0.00 0.00
3.00 0.21 0.00 0.00
3.60 0.26 0.00 0.00
4.20 0.32 0.00 0.00
4.80 0.37 0.00 0.00
5.40 0.43 0.00 0.02
6.00 0.50 0.01 0.05
6.60 0.57 0.02 0.09
7.20 0.64 0.03 0.13
7.80 0.72 0.05 0.17
8.40 0.81 0.08 0.24
9.00 0.91 0.12 0.35
9.60 1.03 0.17 0.42
10.20 1.18 0.24 0.62
10.80 1.38 0.34 1.00
11.40 1.69 0.53 1.92
12.00 4.12 2.48 30.43
12.60 4.62 2.93 2.30
13.20 4.87 3.16 1.54
13.80 5.05 3.32 1.14
14.40 5.19 3.44 0.94
15.00 5.31 3.55 0.82
15.60 5.41 3.65 0.71
16.20 5.50 3.73 0.62
16.80 5.58 3.81 0.58
17.40 5.66 3.88 0.54
18.00 5.73 3.94 0.50
18.60 5.79 4.00 0.46
19.20 5.85 4.06 0.42
19.80 5.90 4.11 0.37
20.40 5.95 4.15 0.35
21.00 6.00 4.20 0.34
21.60 6.05 4.24 0.34
22.20 6.09 4.28 0.33
22.80 6.14 4.32 0.32
23.40 6.18 4.36 0.31
24.00 6.22 4.40 0.30
24.60 6.22 4.40 0.00
25.20 6.22 4.40 0.00
25.80 6.22 4.40 0.00
26.40 6.22 4.40 0.00
27.00 6.22 4.40 0.00
27.60 6.22 4.40 0.00
28.20 6.22 4.40 0.00
28.80 6.22 4.40 0.00
29.40 6.22 4.40 0.00
30.00 6.22 4.40 0.00
30.60 6.22 4.40 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 6.22 4.40 0.00
31.80 6.22 4.40 0.00
32.40 6.22 4.40 0.00
33.00 6.22 4.40 0.00
33.60 6.22 4.40 0.00
34.20 6.22 4.40 0.00
34.80 6.22 4.40 0.00
35.40 6.22 4.40 0.00
36.00 6.22 4.40 0.00
36.60 6.22 4.40 0.00
37.20 6.22 4.40 0.00
37.80 6.22 4.40 0.00
38.40 6.22 4.40 0.00
39.00 6.22 4.40 0.00
39.60 6.22 4.40 0.00
40.20 6.22 4.40 0.00
40.80 6.22 4.40 0.00
41.40 6.22 4.40 0.00
42.00 6.22 4.40 0.00
42.60 6.22 4.40 0.00
43.20 6.22 4.40 0.00
43.80 6.22 4.40 0.00
44.40 6.22 4.40 0.00
45.00 6.22 4.40 0.00
45.60 6.22 4.40 0.00
46.20 6.22 4.40 0.00
46.80 6.22 4.40 0.00
47.40 6.22 4.40 0.00
48.00 6.22 4.40 0.00
•
Rain Garden-1-Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 37
Summary for Pond FBA: FOREBAY 1
C7
Inflow Area = 4.670 ac, 42.18% Impervious, Inflow Depth = 4.40" for Eden 25 year event
Inflow = 36.06 cfs @ 11.96 hrs, Volume= 1.713 of
Outflow = 36.03 cfs @ 11.96 hrs, Volume= 1.634 af, Atten= 0%, Lag= 0.2 min
Primary = 36.03 cfs @ 11.96 hrs, Volume= 1.634 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Peak Elev= 526.33' @ 11.96 hrs Surf.Area= 2,238 sf Storage= 4,185 cf
Plug-Flow detention time= 41.4 min calculated for 1.633 of (95% of inflow)
Center-of-Mass det. time= 14.4 min ( 812.5 - 798.1 )
Volume Invert Avail.Storage Storag e Description
#1 523.00' 5,829 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
523.00 386 0 0
524.00 864 625 625
525.00 1,413 1,139 1,764
526.00 2,018 1,716 3,479
527.00 2,681 2,350 5,829
Device Routing Invert Outlet Devices
#1 Primary 526.00' 70.0' long x 17.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Primary OutFlow Max=35.43 cfs @ 11.96 hrs HW=526.33' (Free Discharge)
L1=Broad-Crested Rectangular Weir (Weir Controls 35.43 cfs @ 1.54 fps)
is
Rain Garden _1_Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
• HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 38

Pond FBA: FOREBAY 1
Hydrograph
40
' -- --- --- -- ¦Inflow

38

' - - = - 36,06 cis - -- - - - - -
- - - - -
? ? - -
¦ Primary
- _ - 36.03 ds - -. ;..
Inflow Area=4
670
36 .
ac

34
32

'
-
- - - -
Peak Elev=526.33`
30
28

--
- -
-- - - Storage=4'1185 cf .
- ---
-

26 ;
,
---- --- ---, ----------
24
w 22 -
3 20 ,
O
16
14 - - -
12
10
g ? I
,
I
6 1
4
2
0

0 2 4 6 8 10 12 14 . .,......
16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
• Time (hours)
Pond FBA: FOREBAY 1
Stage-Discharge
® Primary
m
m
c
0
m
w
C?
- ?? vu ivu Ilu JZU isu 14U 1b0 160 170 180
Discharge (cfs)
•
0
Rain Garden _1_Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 39

Rain Garden_1_Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 40
Hydrograph for Pond FB-1: FOREBAY 1
Time Inflow Storage Elevation Primary
(hours) (cfs) (cubic-feet) (feet) (cfs)
0.00 0.00 0 523.00 0.00
1.50 0.00 0 523.00 0.00
3.00 0.00 0 523.00 0.00
4.50 0.00 0 523.00 0.00
6.00 0.05 98 523.22 0.00
7.50 0.15 644 524.02 0.00
9.00 0.35 1,879 525.08 0.00
10.50 0.77 3,520 526.02 0.77
12.00 30.43 4,120 526.30 31.37
13.50 1.32 3,551 526.04 1.33
15.00 0.82 3,524 526.02 0.83
16.50 0.60 3,511 526.02 0.60
18.00 0.50 3,506 526.01 0.50
19.50 0.39 3,500 526.01 0.40
21.00 0.34 3,498 526.01 0.34
22.50 0.32 3,497 526.01 0.32
24.00 0.30 3,495 526.01 0.30
25.50 0.00 3,479 526.00 0.00
27.00 0.00 3,479 526.00 0.00
28.50 0.00 3,479 526.00 0.00
30.00 0.00 3,479 526.00 0.00
31.50 0.00 3,479 526.00 0.00
•
33.00 0.00 3,479 526.00 0.00
34.50 0.00 3,479 526.00 0.00
36.00 0.00 3,479 526.00 0.00
37.50 0.00 3,479 526.00 0.00
39.00 0.00 3,479 526.00 0.00
40.50 0.00 3,479 526.00 0.00
42.00 0.00 3,479 526.00 0.00
43.50 0.00 3,479 526.00 0.00
45.00 0.00 3,479 526.00 0.00
46.50 0.00 3,479 526.00 0.00
48.00 0.00 3,479 526.00 0.00
0
Rain Garden _1_Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 41
•
•
Elevation Primary
(feet) (cfs)
523.00 0.00
523.02 0.00
523.04 0.00
523.06 0.00
523.08 0.00
523.10 0.00
523.12 0.00
523.14 0.00
523.16 0.00
523.18 0.00
523.20 0.00
523.22 0.00
523.24 0.00
523.26 0.00
523.28 0.00
523.30 0.00
523.32 0.00
523.34 0.00
523.36 0.00
523.38 0.00
523.40 0.00
523.42 0.00
523.44 0.00
523.46 0.00
523.48 0.00
523.50 0.00
523.52 0.00
523.54 0.00
523.56 0.00
523.58 0.00
523.60 0.00
523.62 0.00
523.64 0.00
523.66 0.00
523.68 0.00
523.70 0.00
523.72 0.00
523.74 0.00
523.76 0.00
523.78 0.00
523.80 0.00
523.82 0.00
523.84 0.00
523.86 0.00
523.88 0.00
523.90 0.00
523.92 0.00
523.94 0.00
523.96 0.00
523.98 0.00
524.00 0.00
524.02 0.00
Stage-Discharge for Pond FB-1: FOREBAY 1
Elevation Primary
(feet) (cfs)
524.04 0.00
524.06 0.00
524.08 0.00
524.10 0.00
524.12 0.00
524.14 0.00
524.16 0.00
524.18 0.00
524.20 0.00
524.22 0.00
524.24 0.00
524.26 0.00
524.28 0.00
524.30 0.00
524.32 0.00
524.34 0.00
524.36 0.00
524.38 0.00
524.40 0.00
524.42 0.00
524.44 0.00
524.46 0.00
524.48 0.00
524.50 0.00
524.52 0.00
524.54 0.00
524.56 0.00
524.58 0.00
524.60 0.00
524.62 0.00
524.64 0.00
524.66 0.00
524.68 0.00
524.70 0.00
524.72 0.00
524.74 0.00
524.76 0.00
524.78 0.00
524.80 0.00
524.82 0.00
524.84 0.00
524.86 0.00
524.88 0.00
524.90 0.00
524.92 0.00
524.94 0.00
524.96 0.00
524.98 0.00
525.00 0.00
525.02 0.00
525.04 0.00
525.06 0.00
Elevation Primary
(feet) (cfs)
525.08 0.00
525.10 0.00
525.12 0.00
525.14 0.00
525.16 0.00
525.18 0.00
525.20 0.00
525.22 0.00
525.24 0.00
525.26 0.00
525.28 0.00
525.30 0.00
525.32 0.00
525.34 0.00
525.36 0.00
525.38 0.00
525.40 0.00
525.42 0.00
525.44 0.00
525.46 0.00
525.48 0.00
525.50 0.00
525.52 0.00
525.54 0.00
525.56 0.00
525.58 0.00
525.60 0.00
525.62 0.00
525.64 0.00
525.66 0.00
525.68 0.00
525.70 0.00
525.72 0.00
525.74 0.00
525.76 0.00
525.78 0.00
525.80 0.00
525.82 0.00
525.84 0.00
525.86 0.00
525.88 0.00
525.90 0.00
525.92 0.00
525.94 0.00
525.96 0.00
525.98 0.00
526.00 0.00
526.02 0.53
526.04 1.50
526.06 2.76
526.08 4.24
526.10 5.93
Elevation Primary
(feet) (cfs)
526.12 7.80
526.14 9.83
526.16 12.01
526.18 14.33
526.20 16.78
526.22 19.37
526.24 22.09
526.26 24.93
526.28 27.88
526.30 30.94
526.32 34.11
526.34 37.39
526.36 40.76
526.38 44.24
526.40 47.81
526.42 51.44
526.44 55.16
526.46 58.97
526.48 62.85
526.50 66.82
526.52 70.87
526.54 75.00
526.56 79.20
526.58 83.48
526.60 87.84
526.62 92.06
526.64 96.34
526.66 100.66
526.68 105.04
526.70 109.46
526.72 113.93
526.74 118.44
526.76 123.00
526.78 127.59
526.80 132.23
526.82 137.17
526.84 142.16
526.86 147.22
526.88 152.32
526.90 157.49
526.92 162.70
526.94 167.97
526.96 173.30
526.98 178.67
527.00 184.10
•
Rain Garden _1_Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 42
Stage-Area-Storage for Pond FB-1: FOREBAY 1
•
•
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
523.00 386 0
523.05 410 20
523.10 434 41
523.15 458 63
523.20 482 87
523.25 506 111
523.30 529 137
523.35 553 164
523.40 577 193
523.45 601 222
523.50 625 253
523.55 649 285
523.60 673 318
523.65 697 352
523.70 721 387
523.75 745 424
523.80 768 462
523.85 792 501
523.90 816 541
523.95 840 582
524.00 864 625
524.05 891 669
524.10 919 714
524.15 946 761
524.20 974 809
524.25 1,001 858
524.30 1,029 909
524.35 1,056 961
524.40 1,084 1,015
524.45 1,111 1,069
524.50 1,139 1,126
524.55 1,166 1,183
524.60 1,193 1,242
524.65 1,221 1,303
524.70 1,248 1,364
524.75 1,276 1,427
524.80 1,303 1,492
524.85 1,331 1,558
524.90 1,358 1,625
524.95 1,386 1,694
525.00 1,413 1,764
525.05 1,443 1,835
525.10 1,474 1,908
525.15 1,504 1,982
525.20 1,534 2,058
525.25 1,564 2,136
525.30 1,594 2,215
525.35 1,625 2,295
525.40 1,655 2,377
525.45 1,685 2,461
525.50 1,716 2,546
525.55 1,746 2,632
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
525.60 1,776 2,720
525.65 1,806 2,810
525.70 1,837 2,901
525.75 1,867 2,993
525.80 1,897 3,087
525.85 1,927 3,183
525.90 1,957 3,280
525.95 1,988 3,379
526.00 2,018 3,479
526.05 2,051 3,581
526.10 2,084 3,684
526.15 2,117 3,789
526.20 2,151 3,896
526.25 2,184 4,004
526.30 2,217 4,114
526.35 2,250 4,226
526.40 2,283 4,339
526.45 2,316 4,454
526.50 2,350 4,571
526.55 2,383 4,689
526.60 2,416 4,809
526.65 2,449 4,931
526.70 2,482 5,054
526.75 2,515 5,179
526.80 2,548 5,306
526.85 2,582 5,434
526.90 2,615 5,564
526.95 2,648 5,695
527.00 2,681 5,829
Rain Garden-1-Post Type// 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
• HydroCAD® 9.00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 43
Summary for Pond RG-1: Rain Garden
Inflow Area = 4.670 ac, 42.18% Impervious, Inflow Depth = 4.20" for Eden 25 year event
Inflow = 36.03 cfs @ 11.96 hrs, Volume= 1.634 of
Outflow = 33.28 cfs @ 11.99 hrs, Volume= 1.466 af, Atten= 8%, Lag= 1.7 min
Primary = 33.28 cfs @ 11.99 hrs, Volume= 1.466 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Peak Elev= 525.73'@ 11.99 hrs Surf.Area= 8,593 sf Storage= 13,290 cf
Plug-Flow detention time= 75.2 min calculated for 1.466 of (90% of inflow)
Center-of-Mass det. time= 23.5 min ( 836.1 - 812.5 )
Volume Invert Avail.Storage Storage Description
#1 524.00' 25,073 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
524.00 6,816 0 0
525.00 7,820 7,318 7,318
526.00 8,882 8,351 15,669
527.00 9,925 9,404 25,073
Device Routing Invert Outlet Devices
#1 Primary 525.00' 20.0' long x 12.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.57 2.62 2.70 2.67 2.66 2.67 2.66 2.64
Primary OutFlow Max=32.83 cfs @ 11.99 hrs HW=525.72' (Free Discharge)
t1=Broad-Crested Rectangular Weir (Weir Controls 32.83 cfs @ 2.28 fps)
it
•
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
Pond RG-1: Rain Garden
Stage-Discharge
m
m
c
0
m
w
oU iuu 120 140
• Discharge (cfs)
® Primary
Rain Garden _1Post Type 1124-hr Eden 25 year Rainfall=6.22"
Prepared by WS_P SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 45
Pond RG-1: Rain Garden
Stage-Area-Storage
Surface/Horizontal/Wetted Area (sq-ft)
1,000 2,000 3,000 4,000 5,000 6,000 7,000 8.000 9.000
d
m
w
c
0
.4
m
w
E
0 Surface
0 Storage
0
0 5,000 10,000 15,000 20,000 25,000
Storage (cubic-feet)
Rain Garden_1_Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
. HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 46
Hydrograph for Pond RG-1: Rain Garden
Time Inflow Storage Elevation Primary
(hours) (cfs) (cubic-feet) (feet) (cfs)
0.00 0.00 0 524.00 0.00
1.50 0.00 0 524.00 0.00
3.00 0.00 0 524.00 0.00
4.50 0.00 0 524.00 0.00
6.00 0.00 0 524.00 0.00
7.50 0.00 0 524.00 0.00
9.00 0.00 0 524.00 0.00
10.50 0.77 1,046 524.15 0.00
12.00 31.37 13,262 525.72 33.07
13.50 1.33 8,024 525.09 1.39
15.00 0.83 7,820 525.06 0.85
16.50 0.60 7,722 525.05 0.60
18.00 0.50 7,673 525.05 0.51
19.50 0.40 7,618 525.04 0.41
21.00 0.34 7,585 525.03 0.35
22.50 0.32 7,574 525.03 0.33
24.00 0.30 7,563 525.03 0.31
25.50 0.00 7,320 525.00 0.00
27.00 0.00 7,318 525.00 0.00
28.50 0.00 7,318 525.00 0.00
30.00 0.00 7,318 525.00 0.00
31.50 0.00 7,318 525.00 0.00
33.00 0.00 7,318 525.00 0.00
34.50 0.00 7,318 525.00 0.00
36.00 0.00 7,318 525.00 0.00
37.50 0.00 7,318 525.00 0.00
39.00 0.00 7,318 525.00 0.00
40.50 0.00 7,318 525.00 0.00
42.00 0.00 7,318 525.00 0.00
43.50 0.00 7,318 525.00 0.00
45.00 0.00 7,318 525.00 0.00
46.50 0.00 7,318 525.00 0.00
48.00 0.00 7,318 525.00 0.00
0
•
•
•
Rain Garden-1-Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD@)9.00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 47
Elevation Primary
(feet) (cfs)
524.00 0.00
524.02 0.00
524.04 0.00
524.06 0.00
524.08 0.00
524.10 0.00
524.12 0.00
524.14 0.00
524.16 0.00
524.18 0.00
524.20 0.00
524.22 0.00
524.24 0.00
524.26 0.00
524.28 0.00
524.30 0.00
524.32 0.00
524.34 0.00
524.36 0.00
524.38 0.00
524.40 0.00
524.42 0.00
524.44 0.00
524.46 0.00
524.48 0.00
524.50 0.00
524.52 0.00
524.54 0.00
524.56 0.00
524.58 0.00
524.60 0.00
524.62 0.00
524.64 0.00
524.66 0.00
524.68 0.00
524.70 0.00
524.72 0.00
524.74 0.00
524.76 0.00
524.78 0.00
524.80 0.00
524.82 0.00
524.84 0.00
524.86 0.00
524.88 0.00
524.90 0.00
524.92 0.00
524.94 0.00
524.96 0.00
524.98 0.00
525.00 0.00
525.02 0.15
Stage-Discharge for Pond RG-1: Rain Garden
Elevation Primary
(feet) (cfs)
525.04 0.41
525.06 0.76
525.08 1.16
525.10 1.63
525.12 2.14
525.14 2.69
525.16 3.29
525.18 3.93
525.20 4.60
525.22 5.31
525.24 6.07
525.26 6.85
525.28 7.67
525.30 8.53
525.32 9.41
525.34 10.33
525.36 11.28
525.38 12.25
525.40 13.26
525.42 14.31
525.44 15.39
525.46 16.50
525.48 17.64
525.50 18.81
525.52 20.01
525.54 21.24
525.56 22.50
525.58 23.78
525.60 25.10
525.62 26.33
525.64 27.59
525.66 28.86
525.68 30.15
525.70 31.45
525.72 32.77
525.74 34.11
525.76 35.46
525.78 36.83
525.80 38.21
525.82 39.64
525.84 41.08
525.86 42.54
525.88 44.02
525.90 45.51
525.92 47.02
525.94 48.54
525.96 50.08
525.98 51.63
526.00 53.20
526.02 54.82
526.04 56.47
526.06 58.12
Elevation Primary
(feet) (cfs)
526.08 59.80
526.10 61.49
526.12 63.20
526.14 64.92
526.16 66.67
526.18 68.42
526.20 70.20
526.22 71.93
526.24 73.68
526.26 75.44
526.28 77.22
526.30 79.00
526.32 80.80
526.34 82.61
526.36 84.44
526.38 86.28
526.40 88.13
526.42 89.95
526.44 91.79
526.46 93.64
526.48 95.50
526.50 97.37
526.52 99.25
526.54 101.13
526.56 103.03
526.58 104.94
526.60 106.86
526.62 108.87
526.64 110.89
526.66 112.93
526.68 114.97
526.70 117.03
526.72 119.10
526.74 121.19
526.76 123.28
526.78 125.39
526.80 127.51
526.82 129.64
526.84 131.78
526.86 133.94
526.88 136.10
526.90 138.28
526.92 140.47
526.94 142.67
526.96 144.88
526.98 147.11
527.00 149.34
•
Rain Garden _1_Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 48
Stage-Area-Storage for Pond RG-1: Rain Garden
•

Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
524.00 6,816 0
524.05 6,866 342
524.10 6,916 687
524.15 6,967 1,034
524.20 7,017 1,383
524.25 7,067 1,735
524.30 7,117 2,090
524.35 7,167 2,447
524.40 7,218 2,807
524.45 7,268 3,169
524.50 7,318 3,534
524.55 7,368 3,901
524.60 7,418 4,270
524.65 7,469 4,642
524.70 7,519 5,017
524.75 7,569 5,394
524.80 7,619 5,774
524.85 7,669 6,156
524.90 7,720 6,541
524.95 7,770 6,928
525.00 7,820 7,318
525.05 7,873 7,710
525.10 7,926 8,105
525.15 7,979 8,503
525.20 8,032 8,903
525.25 8,086 9,306
525.30 8,139 9,712
525.35 8,192 10,120
525.40 8,245 10,531
525.45 8,298 10,945
525.50 8,351 11,361
525.55 8,404 11,780
525.60 8,457 12,201
525.65 8,510 12,625
525.70 8,563 13,052
525.75 8,617 13,482
525.80 8,670 13,914
525.85 8,723 14,349
525.90 8,776 14,786
525.95 8,829 15,226
526.00 8,882 15,669
526.05 8,934 16,114
526.10 8,986 16,562
526.15 9,038 17,013
526.20 9,091 17,466
526.25 9,143 17,922
526.30 9,195 18,381
526.35 9,247 18,842
526.40 9,299 19,305
526.45 9,351 19,772
526.50 9,404 20,240
526.55 9,456 20,712
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
526.60 9,508 21,186
526.65 9,560 21,663
526.70 9,612 22,142
526.75 9,664 22,624
526.80 9,716 23,108
526.85 9,769 23,595
526.90 9,821 24,085
526.95 9,873 24,578
527.00 9,925 25,073
•
Rain Garden _1_Post Type 1124-hr Eden 50 year Rainfall=7.1 T'
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 49
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA1: Post Runoff Area=4.670 ac 42.18% Impervious Runoff Depth=5.30"
Tc=5.0 min CN=84 Runoff=42.92 cfs 2.063 of
Pond FB-1: FOREBAY 1 Peak Elev=526.37' Storage=4,276 cf Inflow=42.92 cfs 2.063 of
Outflow=42.88 cfs 1.983 of
Pond RG-1: Rain Garden Peak Elev=525.82' Storage=14,112 cf Inflow=42.88 cfs 1.983 of
Outflow=39.82 cfs 1.815 of
Total Runoff Area = 4.670 ac Runoff Volume = 2.063 of Average Runoff Depth = 5.30"
57.82% Pervious = 2.700 ac 42.18% Impervious =1.970 ac
0

Rain Garden-1-Post Type 1124-hr Eden 50 year Rainfa&7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 50
Summary for Subcatchment DA1: Post
Runoff = 42.92 cfs @ 11.96 hrs, Volume= 2.063 af, Depth= 5.30"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 50 year Rainfall=7.17"
Area (ac) CN Description
0.440 98 Paved parking, HSG C
1.530 98 Roofs, HSG C
2.700 74 >75% Grass cover, Good, HSG C
4.670 84 Weighted Average
2.700 57.82% Pervious Area
1.970 42.18% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment DA1: Post
•
Hydrograph
48 - -
-- - - --- -
46 - ®Runoff
42
44 sz cfs j - - -
r r - - - -i - - - - - _ r - - ?- - r - - - - - _ - - - - - - - -
i
42 - Type-II 24-hr, Eden ...
40 _ -- --- -------------------- -- -- --------------'---'
---
38 -
5Q year- _.
36 - - -- -- ----
-r-- - -- r - - r--
34
Rainfall 7:17"
32 --- --- - -- --- - - ----F - -------- --------------
30 µ Runoff Area=4.670 ac-
-- - - - - - -
?. 28 _ _
- - - - - - - - - - - - - - - - - I - - - ---- ---
26 - Runoff; Volume =2.063 of
24
c 22
Runoff Depth _5:30''_
a 20 __ - __ _
18
Tc=5A min
- - ------------
16 - -' --' - - - - - - - -
----
CN=84
12 r - - - - r - -.
10
..... ..........---i. . .T-f
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
0
•
Rain Garden-1-Post Type// 24-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 51
Hydrograph for Subcatchment DA1: Post
•
•
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.04 0.00 0.00
1.20 0.09 0.00 0.00
1.80 0.14 0.00 0.00
2.40 0.19 0.00 0.00
3.00 0.25 0.00 0.00
3.60 0.30 0.00 0.00
4.20 0.36 0.00 0.00
4.80 0.43 0.00 0.02
5.40 0.50 0.01 0.06
6.00 0.57 0.02 0.10
6.60 0.65 0.03 0.15
7.20 0.74 0.06 0.19
7.80 0.83 0.09 0.24
8.40 0.93 0.12 0.33
9.00 1.05 0.18 0.47
9.60 1.19 0.24 0.55
10.20 1.36 0.33 0.81
10.80 1.59 0.47 1.27
11.40 1.95 0.71 2.39
12.00 4.75 3.05 36.10
12.60 5.33 3.57 2.71
13.20 5.62 3.84 1.80
13.80 5.82 4.03 1.34
14.40 5.98 4.18 1.10
15.00 6.12 4.31 0.97
15.60 6.24 4.42 0.84
16.20 6.34 4.52 0.72
16.80 6.44 4.61 0.67
17.40 6.52 4.69 0.63
18.00 6.60 4.76 0.58
18.60 6.68 4.83 0.53
19.20 6.75 4.90 0.49
19.80 6.81 4.96 0.44
20.40 6.86 5.01 0.41
21.00 6.92 5.06 0.40
21.60 6.97 5.11 0.39
22.20 7.02 5.16 0.38
22.80 7.07 5.21 0.37
23.40 7.12 5.26 0.36
24.00 7.17 5.30 0.35
24.60 7.17 5.30 0.00
25.20 7.17 5.30 0.00
25.80 7.17 5.30 0.00
26.40 7.17 5.30 0.00
27.00 7.17 5.30 0.00
27.60 7.17 5.30 0.00
28.20 7.17 5.30 0.00
28.80 7.17 5.30 0.00
29.40 7.17 5.30 0.00
30.00 7.17 5.30 0.00
30.60 7.17 5.30 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 7.17 5.30 0.00
31.80 7.17 5.30 0.00
32.40 7.17 5.30 0.00
33.00 7.17 5.30 0.00
33.60 7.17 5.30 0.00
34.20 7.17 5.30 0.00
34.80 7.17 5.30 0.00
35.40 7.17 5.30 0.00
36.00 7.17 5.30 0.00
36.60 7.17 5.30 0.00
37.20 7.17 5.30 0.00
37.80 7.17 5.30 0.00
38.40 7.17 5.30 0.00
39.00 7.17 5.30 0.00
39.60 7.17 5.30 0.00
40.20 7.17 5.30 0.00
40.80 7.17 5.30 0.00
41.40 7.17 5.30 0.00
42.00 7.17 5.30 0.00
42.60 7.17 5.30 0.00
43.20 7.17 5.30 0.00
43.80 7.17 5.30 0.00
44.40 7.17 5.30 0.00
45.00 7.17 5.30 0.00
45.60 7.17 5.30 0.00
46.20 7.17 5.30 0.00
46.80 7.17 5.30 0.00
47.40 7.17 5.30 0.00
48.00 7.17 5.30 0.00
Rain Garden _1_Post Type// 24-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 52
Summary for Pond FBA: FOREBAY 1
Inflow Area = 4.670 ac, 42.18% Impervious, Inflow Depth = 5.30" for Eden 50 year event
Inflow = 42.92 cfs @ 11.96 hrs, Volume= 2.063 of
Outflow = 42.88 cfs @ 11.96 hrs, Volume= 1.983 af, Atten= 0%, Lag= 0.2 min
Primary = 42.88 cfs @ 11.96 hrs, Volume= 1.983 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Peak Elev= 526.37'@ 11.96 hrs Surf.Area= 2,265 sf Storage= 4,276 cf
Plug-Flow detention time= 36.4 min calculated for 1.982 of (96% of inflow)
Center-of-Mass det. time= 13.4 min ( 806.3 - 792.9 )
Volume Invert Avail.Storage Storage Description
#1 523.00' 5,829 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
523.00 386 0 0
524.00 864 625 625
525.00 1,413 1,139 1,764
526.00 2,018 1,716 3,479
527.00 2,681 2,350 5,829
Device Routing Invert Outlet Devices
#1 Primary 526.00' 70.0' long x 17.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Primary OutFlow Max=42.15 cfs @ 11.96 hrs HW=526.37' (Free Discharge)
t1=Broad-Crested Rectangular Weir (Weir Controls 42.15 cfs @ 1.64 fps)
0
Rain Garden _1Post Type // 24-hr Eden 50 year Rainfall=7.17"
Prepared by WS_P SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 53
Pond FBA: FOREBAY 1
Hydrograph
----:- -'_,- --_ _ .... _. -..... _..- - ... ....,. . _ _._._, ..-.__. - , - - -
'--

48 .
- -- ' --
---
- - - - - -
- - -

nflow
46 - -
42.92 cfs - -
- -
- -
- - - - - _ - -
- - -
- - ¦ Primary
44 I i
..
I
A
az.eeas r Inflow Mrea= 467o ac

42 i
40 - - - - - - --- ' - --Pea
- - Ele
6
`
38 v=x2
-.37
34 -Stora a-4
276 I
32 ,
-- - ... - _.,__....I

H 28 - , I I I I I I
v 26 -, - - - r - : -
3 24 _- - - --- '- -- '-- - - r ----- ', - - I - -------
_0 22 -,. ---1-...-I -
FL 20 -.
I
I
- -- r -: ------ i- --- . r -. --- : - - - - -- - - - -
I
18
16 -r
14 - - -----; - -- I---------I- --------- ---- ------ ---
12
I
10
I I I I I
.
8 ?" i '. I I I i I I I I_
I : I I - I I
I ? I I
r
4 ,
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
Pond FB-1: FOREBAY 1
Stage-Discharge
® Primary
m
m
w
00
m
W
0
V Iu Lu bu 4u 5V bu tu du 90 100 110 120 130 140 150 160 170 180
Discharge (cfs)
Rain Garden-1-Post Type 1124-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 54
Pond FB-1: FOREBAY 1
Stage-Area-Storage
Surface/Horizontal/Wetted Area (sq-ft)
0 200 400 600 800 1,000 1,200 1,400 1,600 1,800
m
m
w
c
0
m
m
w
•
2,000 2,200 2,400 2,600 p Surface
¦ Storage
?JJ
0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 5,500
Storage (cubic-feet)
Rain Garden-1-Post Type 1124-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
is HydroCAD® 9.00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 55
Hydrograph for Pond FB-1: FOREBAY 1
Time Inflow Storage Elevation Primary
(hours) (cfs) (cubic-feet) (feet) (cfs)
0.00 0.00 0 523.00 0.00
1.50 0.00 0 523.00 0.00
3.00 0.00 0 523.00 0.00
4.50 0.00 1 523.00 0.00
6.00 0.10 271 523.53 0.00
7.50 0.22 1,128 524.50 0.00
9.00 0.47 2,846 525.67 0.00
10.50 0.99 3,532 526.03 0.98
12.00 36.10 4,200 526.34 37.18
13.50 1.54 3,562 526.04 1.55
15.00 0.97 3,532 526.03 0.97
16.50 0.70 3,517 526.02 0.70
18.00 0.58 3,510 526.02 0.58
19.50 0.46 3,504 526.01 0.46
21.00 0.40 3,501 526.01 0.40
22.50 0.38 3,499 526.01 0.38
24.00 0.35 3,498 526.01 0.35
25.50 0.00 3,479 526.00 0.00
27.00 0.00 3,479 526.00 0.00
28.50 0.00 3,479 526.00 0.00
30.00 0.00 3,479 526.00 0.00
31.50 0.00 3,479 526.00 0.00
33.00
0 0.00 3,479 526.00 0.00
34.50 0.00 3,479 526.00 0.00
36.00 0.00 3,479 526.00 0.00
37.50 0.00 3,479 526.00 0.00
39.00 0.00 3,479 526.00 0.00
40.50 0.00 3,479 526.00 0.00
42.00 0.00 3,479 526.00 0.00
43.50 0.00 3,479 526.00 0.00
45.00 0.00 3,479 526.00 0.00
46.50 0.00 3,479 526.00 0.00
48.00 0.00 3,479 526.00 0.00
0
•
•
•
Rain Garden _1_Post Type 11 24-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 56
Elevation Primary
(feet) (cfs)
523.00 0.00
523.02 0.00
523.04 0.00
523.06 0.00
523.08 0.00
523.10 0.00
523.12 0.00
523.14 0.00
523.16 0.00
523.18 0.00
523.20 0.00
523.22 0.00
523.24 0.00
523.26 0.00
523.28 0.00
523.30 0.00
523.32 0.00
523.34 0.00
523.36 0.00
523.38 0.00
523.40 0.00
523.42 0.00
523.44 0.00
523.46 0.00
523.48 0.00
523.50 0.00
523.52 0.00
523.54 0.00
523.56 0.00
523.58 0.00
523.60 0.00
523.62 0.00
523.64 0.00
523.66 0.00
523.68 0.00
523.70 0.00
523.72 0.00
523.74 0.00
523.76 0.00
523.78 0.00
523.80 0.00
523.82 0.00
523.84 0.00
523.86 0.00
523.88 0.00
523.90 0.00
523.92 0.00
523.94 0.00
523.96 0.00
523.98 0.00
524.00 0.00
524.02 0.00
Stage-Discharge for Pond FB-1: FOREBAY 1
Elevation Primary
(feet) (cfs)
524.04 0.00
524.06 0.00
524.08 0.00
524.10 0.00
524.12 0.00
524.14 0.00
524.16 0.00
524.18 0.00
524.20 0.00
524.22 0.00
524.24 0.00
524.26 0.00
524.28 0.00
524.30 0.00
524.32 0.00
524.34 0.00
524.36 0.00
524.38 0.00
524.40 0.00
524.42 0.00
524.44 0.00
524.46 0.00
524.48 0.00
524.50 0.00
524.52 0.00
524.54 0.00
524.56 0.00
524.58 0.00
524.60 0.00
524.62 0.00
524.64 0.00
524.66 0.00
524.68 0.00
524.70 0.00
524.72 0.00
524.74 0.00
524.76 0.00
524.78 0.00
524.80 0.00
524.82 0.00
524.84 0.00
524.86 0.00
524.88 0.00
524.90 0.00
524.92 0.00
524.94 0.00
524.96 0.00
524.98 0.00
525.00 0.00
525.02 0.00
525.04 0.00
525.06 0.00
Elevation Primary
(feet) (cfs)
525.08 0.00
525.10 0.00
525.12 0.00
525.14 0.00
525.16 0.00
525.18 0.00
525.20 0.00
525.22 0.00
525.24 0.00
525.26 0.00
525.28 0.00
525.30 0.00
525.32 0.00
525.34 0.00
525.36 0.00
525.38 0.00
525.40 0.00
525.42 0.00
525.44 0.00
525.46 0.00
525.48 0.00
525.50 0.00
525.52 0.00
525.54 0.00
525.56 0.00
525.58 0.00
525.60 0.00
525.62 0.00
525.64 0.00
525.66 0.00
525.68 0.00
525.70 0.00
525.72 0.00
525.74 0.00
525.76 0.00
525.78 0.00
525.80 0.00
525.82 0.00
525.84 0.00
525.86 0.00
525.88 0.00
525.90 0.00
525.92 0.00
525.94 0.00
525.96 0.00
525.98 0.00
526.00 0.00
526.02 0.53
526.04 1.50
526.06 2.76
526.08 4.24
526.10 5.93
Elevation Primary
(feet) (cfs)
526.12 7.80
526.14 9.83
526.16 12.01
526.18 14.33
526.20 16.78
526.22 19.37
526.24 22.09
526.26 24.93
526.28 27.88
526.30 30.94
526.32 34.11
526.34 37.39
526.36 40.76
526.38 44.24
526.40 47.81
526.42 51.44
526.44 55.16
526.46 58.97
526.48 62.85
526.50 66.82
526.52 70.87
526.54 75.00
526.56 79.20
526.58 83.48
526.60 87.84
526.62 92.06
526.64 96.34
526.66 100.66
526.68 105.04
526.70 109.46
526.72 113.93
526.74 118.44
526.76 123.00
526.78 127.59
526.80 132.23
526.82 137.17
526.84 142.16
526.86 147.22
526.88 152.32
526.90 157.49
526.92 162.70
526.94 167.97
526.96 173.30
526.98 178.67
527.00 184.10
•
Rain Garden _1_Post Type 1124-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 57
Stage-Area-Storage for Pond FB-1: FOREBAY 1
•

Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
523.00 386 0
523.05 410 20
523.10 434 41
523.15 458 63
523.20 482 87
523.25 506 111
523.30 529 137
523.35 553 164
523.40 577 193
523.45 601 222
523.50 625 253
523.55 649 285
523.60 673 318
523.65 697 352
523.70 721 387
523.75 745 424
523.80 768 462
523.85 792 501
523.90 816 541
523.95 840 582
524.00 864 625
524.05 891 669
524.10 919 714
524.15 946 761
524.20 974 809
524.25 1,001 858
524.30 1,029 909
524.35 1,056 961
524.40 1,084 1,015
524.45 1,111 1,069
524.50 1,139 1,126
524.55 1,166 1,183
524.60 1,193 1,242
524.65 1,221 1,303
524.70 1,248 1,364
524.75 1,276 1,427
524.80 1,303 1,492
524.85 1,331 1,558
524.90 1,358 1,625
524.95 1,386 1,694
525.00 1,413 1,764
525.05 1,443 1,835
525.10 1,474 1,908
525.15 1,504 1,982
525.20 1,534 2,058
525.25 1,564 2,136
525.30 1,594 2,215
525.35 1,625 2,295
525.40 1,655 2,377
525.45 1,685 2,461
525.50 1,716 2,546
525.55 1,746 2,632
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
525.60 1,776 2,720
525.65 1,806 2,810
525.70 1,837 2,901
525.75 1,867 2,993
525.80 1,897 3,087
525.85 1,927 3,183
525.90 1,957 3,280
525.95 1,988 3,379
526.00 2,018 3,479
526.05 2,051 3,581
526.10 2,084 3,684
526.15 2,117 3,789
526.20 2,151 3,896
526.25 2,184 4,004
526.30 2,217 4,114
526.35 2,250 4,226
526.40 2,283 4,339
526.45 2,316 4,454
526.50 2,350 4,571
526.55 2,383 4,689
526.60 2,416 4,809
526.65 2,449 4,931
526.70 2,482 5,054
526.75 2,515 5,179
526.80 2,548 5,306
526.85 2,582 5,434
526.90 2,615 5,564
526.95 2,648 5,695
527.00 2,681 5,829
Rain Garden _1_Post Type 11 24-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 58
Summary for Pond RG-1: Rain Garden
Inflow Area = 4.670 ac, 42.18% Impervious, Inflow Depth = 5.10" for Eden 50 year event
Inflow = 42.88 cfs @ 11.96 hrs, Volume= 1.983 of
Outflow = 39.82 cfs @ 11.99 hrs, Volume= 1.815 af, Atten= 7%, Lag= 1.6 min
Primary = 39.82 cfs @ 11.99 hrs, Volume= 1.815 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Peak Elev= 525.82'@ 11.99 hrs Surf.Area= 8,694 sf Storage= 14,112 cf
Plug-Flow detention time= 66.5 min calculated for 1.815 of (92% of inflow)
Center-of-Mass det. time= 22.0 min ( 828.3 - 806.3 )
Volume Invert Avail.Storage Storage Description
#1 524.00' 25,073 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
524.00 6,816 0 0
525.00 7,820 7,318 7,318
526.00 8,882 8,351 15,669
527.00 9,925 9,404 25,073
Device Routing Invert Outlet Devices
#1 Primary 525.00' 20.0' long x 12.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.57 2.62 2.70 2.67 2.66 2.67 2.66 2.64
Primary OutFlow Max=39.23 cfs @ 11.99 hrs HW=525.81' (Free Discharge)
t1=Broad-Crested Rectangular Weir (Weir Controls 39.23 cfs @ 2.41 fps)
E
Rain Garden _1_Post Type 11 24-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 59
Pond RG-1: Rain Garden
Hydrograph

48 - - ,- - - - -- - - - - -

-
¦ Inflow
46 - - - - az.es as
-
- - -
- --- --- ---
- - ¦ Primary
44 r
Infid
w Area-4.670 ac
InfidwArea 4
670 ac
42
.
as.ez
ds
-
ea
E
5
38 P
k-
1ev=
25.82 -
36
34 C -
#orage=14
112 cf
32 ,
-
30 - .- --,---, - ------ - -- - - - - - - - - - - - - - -r -, ---, -,--- --
28
26 - - -
3 24 -----------------
0 22
u 20 ______ ____ _____,---------------
- r

16
14 - - - - - - - - - - -- ; -- - - - - -------- ---------------------
12
10
ML
6 -
A.
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
0 Time (hours)
Pond RG-1: Rain Garden
Stage-Discharge
® Primary
d
m
w
c
0
v
W
0
u cu 4u 60 80 100 120 140
Discharge (cfs)
Rain Garden _1_Post Type 11 24-hr Eden 50 year Rainfall= 7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 60
Pond RG-1: Rain Garden
Stage-Area-Storage
Surface/Horizontal wetted Area (sq-ft)
0 1,000 2,000 3,000 4,000 5.000 6.000 7.000 8 000 s onn
m
m
w
c
0
m
w
•
0 Surface
¦ Storage
0
u 5,000 10,000 15,000 20,000 25,000
Storage (cubic-feet)
Rain Garden-1-Post Type// 24-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 61
Hydrograph for Pond RG-1: Rain Garden
Time Inflow Storage Elevation Primary
(hours) (cfs) (cubic-feet) (feet) (cfs)
0.00 0.00 0 524.00 0.00
1.50 0.00 0 524.00 0.00
3.00 0.00 0 524.00 0.00
4.50 0.00 0 524.00 0.00
6.00 0.00 0 524.00 0.00
7.50 0.00 0 524.00 0.00
9.00 0.00 0 524.00 0.00
10.50 0.98 2,829 524.40 0.00
12.00 37.18 14,068 525.82 39.48
13.50 1.55 8,104 525.10 1.63
15.00 0.97 7,879 525.07 0.99
16.50 0.70 7,764 525.06 0.71
18.00 0.58 7,717 525.05 0.59
19.50 0.46 7,656 525.04 0.48
21.00 0.40 7,617 525.04 0.40
22.50 0.38 7,604 525.04 0.38
24.00 0.35 7,591 525.03 0.36
25.50 0.00 7,320 525.00 0.00
27.00 0.00 7,318 525.00 0.00
28.50 0.00 7,318 525.00 0.00
30.00 0.00 7,318 525.00 0.00
31.50 0.00 7,318 525.00 0.00
33.00 0.00 7,318 525.00 0.00
34.50 0.00 7,318 525.00 0.00
36.00 0.00 7,318 525.00 0.00
37.50 0.00 7,318 525.00 0.00
39.00 0.00 7,318 525.00 0.00
40.50 0.00 7,318 525.00 0.00
42.00 0.00 7,318 525.00 0.00
43.50 0.00 7,318 525.00 0.00
45.00 0.00 7,318 525.00 0.00
46.50 0.00 7,318 525.00 0.00
48.00 0.00 7,318 525.00 0.00
•
•
•
•
Rain Garden_1_Post Type 1124-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 sh 04719 0 2009 HydroCAD Software Solutions LLC Page 62
Elevation Primary
(feet) (cfs)
524.00 0.00
524.02 0.00
524.04 0.00
524.06 0.00
524.08 0.00
524.10 0.00
524.12 0.00
524.14 0.00
524.16 0.00
524.18 0.00
524.20 0.00
524.22 0.00
524.24 0.00
524.26 0.00
524.28 0.00
524.30 0.00
524.32 0.00
524.34 0.00
524.36 0.00
524.38 0.00
524.40 0.00
524.42 0.00
524.44 0.00
524.46 0.00
524.48 0.00
524.50 0.00
524.52 0.00
524.54 0.00
524.56 0.00
524.58 0.00
524.60 0.00
524.62 0.00
524.64 0.00
524.66 0.00
524.68 0.00
524.70 0.00
524.72 0.00
524.74 0.00
524.76 0.00
524.78 0.00
524.80 0.00
524.82 0.00
524.84 0.00
524.86 0.00
524.88 0.00
524.90 0.00
524.92 0.00
524.94 0.00
524.96 0.00
524.98 0.00
525.00 0.00
525.02 0.15
Stage-Discharge for Pond RG-1: Rain Garden
Elevation Primary
(feet) (cfs)
525.04 0.41
525.06 0.76
525.08 1.16
525.10 1.63
525.12 2.14
525.14 2.69
525.16 3.29
525.18 3.93
525.20 4.60
525.22 5.31
525.24 6.07
525.26 6.85
525.28 7.67
525.30 8.53
525.32 9.41
525.34 10.33
525.36 11.28
525.38 12.25
525.40 13.26
525.42 14.31
525.44 15.39
525.46 16.50
525.48 17.64
525.50 18.81
525.52 20.01
525.54 21.24
525.56 22.50
525.58 23.78
525.60 25.10
525.62 26.33
525.64 27.59
525.66 28.86
525.68 30.15
525.70 31.45
525.72 32.77
525.74 34.11
525.76 35.46
525.78 36.83
525.80 38.21
525.82 39.64
525.84 41.08
525.86 42.54
525.88 44.02
525.90 45.51
525.92 47.02
525.94 48.54
525.96 50.08
525.98 51.63
526.00 53.20
526.02 54.82
526.04 56.47
526.06 58.12
Elevation Primary
(feet) (cfs)
526.08 59.80
526.10 61.49
526.12 63.20
526.14 64.92
526.16 66.67
526.18 68.42
526.20 70.20
526.22 71.93
526.24 73.68
526.26 75.44
526.28 77.22
526.30 79.00
526.32 80.80
526.34 82.61
526.36 84.44
526.38 86.28
526.40 88.13
526.42 89.95
526.44 91.79
526.46 93.64
526.48 95.50
526.50 97.37
526.52 99.25
526.54 101.13
526.56 103.03
526.58 104.94
526.60 106.86
526.62 108.87
526.64 110.89
526.66 112.93
526.68 114.97
526.70 117.03
526.72 119.10
526.74 121.19
526.76 123.28
526.78 125.39
526.80 127.51
526.82 129.64
526.84 131.78
526.86 133.94
526.88 136.10
526.90 138.28
526.92 140.47
526.94 142.67
526.96 144.88
526.98 147.11
527.00 149.34
L`
Rain Garden _1_Post Type 11 24-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 63
Stage-Area-Storage for Pond RG-1: Rain Garden
•
•
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
524.00 6,816 0
524.05 6,866 342
524.10 6,916 687
524.15 6,967 1,034
524.20 7,017 1,383
524.25 7,067 1,735
524.30 7,117 2,090
524.35 7,167 2,447
524.40 7,218 2,807
524.45 7,268 3,169
524.50 7,318 3,534
524.55 7,368 3,901
524.60 7,418 4,270
524.65 7,469 4,642
524.70 7,519 5,017
524.75 7,569 5,394
524.80 7,619 5,774
524.85 7,669 6,156
524.90 7,720 6,541
524.95 7,770 6,928
525.00 7,820 7,318
525.05 7,873 7,710
525.10 7,926 8,105
525.15 7,979 8,503
525.20 8,032 8,903
525.25 8,086 9,306
525.30 8,139 9,712
525.35 8,192 10,120
525.40 8,245 10,531
525.45 8,298 10,945
525.50 8,351 11,361
525.55 8,404 11,780
525.60 8,457 12,201
525.65 8,510 12,625
525.70 8,563 13,052
525.75 8,617 13,482
525.80 8,670 13,914
525.85 8,723 14,349
525.90 8,776 14,786
525.95 8,829 15,226
526.00 8,882 15,669
526.05 8,934 16,114
526.10 8,986 16,562
526.15 9,038 17,013
526.20 9,091 17,466
526.25 9,143 17,922
526.30 9,195 18,381
526.35 9,247 18,842
526.40 9,299 19,305
526.45 9,351 19,772
526.50 9,404 20,240
526.55 9,456 20,712
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
526.60 9,508 21,186
526.65 9,560 21,663
526.70 9,612 22,142
526.75 9,664 22,624
526.80 9,716 23,108
526.85 9,769 23,595
526.90 9,821 24,085
526.95 9,873 24,578
527.00 9,925 25,073
Rain Garden-1-Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 64
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA1: Post Runoff Area=4.670 ac 42.18% Impervious Runoff Depth=6.30"
Tc=5.0 min CN=84 Runoff=50.41 cfs 2.451 of
Pond FIB-1: FOREBAY 1 Peak Elev=526.41' Storage=4,371 cf Inflow=50.41 cfs 2.451 of
Outflow=50.36 cfs 2.371 of
Pond RG-1: Rain Garden Peak Elev=525.92' Storage=14,965 cf Inflow=50.36 cfs 2.371 of
Outflow=47.03 cfs 2.203 of
Total Runoff Area = 4.670 ac Runoff Volume = 2.451 of Average Runoff Depth = 6.30"
57.82% Pervious= 2.700 ac 42.18% Impervious= 1.970ac
•
0
Rain Garden-1-Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 65
Summary for Subcatchment DA1: Post
Runoff = 50.41 cfs @ 11.96 hrs, Volume= 2.451 af, Depth= 6.30"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 100 year Rainfall=8.21"
Area (ac) CN Description
0.440 98 Paved parking, HSG C
1.530 98 Roofs, HSG C
2.700 74 >75% Grass cover, Good, HSG C
4.670 84 Weighted Average
2.700 57.82% Pervious Area
1.970 42.18% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment DA1: Post
•
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
0
•
Rain Garden _1_Post Type // 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 66
Hydrograph for Subcatchment DA1: Post
•
is
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.05 0.00 0.00
1.20 0.10 0.00 0.00
1.80 0.16 0.00 0.00
2.40 0.22 0.00 0.00
3.00 0.28 0.00 0.00
3.60 0.35 0.00 0.00
4.20 0.42 0.00 0.02
4.80 0.49 0.01 0.06
5.40 0.57 0.02 0.11
6.00 0.66 0.03 0.16
6.60 0.75 0.06 0.21
7.20 0.85 0.09 0.27
7.80 0.95 0.13 0.33
8.40 1.06 0.18 0.44
9.00 1.21 0.25 0.61
9.60 1.37 0.34 0.70
10.20 1.56 0.45 1.01
10.80 1.82 0.62 1.57
11.40 2.23 0.91 2.92
12.00 5.44 3.68 42.28
12.60 6.10 4.29 3.15
13.20 6.43 4.60 2.10
13.80 6.67 4.83 1.56
14.40 6.85 5.00 1.27
15.00 7.01 5.15 1.12
15.60 7.14 5.28 0.97
16.20 7.26 5.39 0.84
16.80 7.37 5.49 0.78
17.40 7.47 5.59 0.73
18.00 7.56 5.68 0.67
18.60 7.65 5.76 0.62
19.20 7.72 5.83 0.56
19.80 7.79 5.90 0.51
20.40 7.86 5.96 0.48
21.00 7.92 6.02 0.46
21.60 7.98 6.08 0.45
22.20 8.04 6.13 0.44
22.80 8.10 6.19 0.43
23.40 8.16 6.24 0.42
24.00 8.21 6.30 0.41
24.60 8.21 6.30 0.00
25.20 8.21 6.30 0.00
25.80 8.21 6.30 0.00
26.40 8.21 6.30 0.00
27.00 8.21 6.30 0.00
27.60 8.21 6.30 0.00
28.20 8.21 6.30 0.00
28.80 8.21 6.30 0.00
29.40 8.21 6.30 0.00
30.00 8.21 6.30 0.00
30.60 8.21 6.30 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 8.21 6.30 0.00
31.80 8.21 6.30 0.00
32.40 8.21 6.30 0.00
33.00 8.21 6.30 0.00
33.60 8.21 6.30 0.00
34.20 8.21 6.30 0.00
34.80 8.21 6.30 0.00
35.40 8.21 6.30 0.00
36.00 8.21 6.30 0.00
36.60 8.21 6.30 0.00
37.20 8.21 6.30 0.00
37.80 8.21 6.30 0.00
38.40 8.21 6.30 0.00
39.00 8.21 6.30 0.00
39.60 8.21 6.30 0.00
40.20 8.21 6.30 0.00
40.80 8.21 6.30 0.00
41.40 8.21 6.30 0.00
42.00 8.21 6.30 0.00
42.60 8.21 6.30 0.00
43.20 8.21 6.30 0.00
43.80 8.21 6.30 0.00
44.40 8.21 6.30 0.00
45.00 8.21 6.30 0.00
45.60 8.21 6.30 0.00
46.20 8.21 6.30 0.00
46.80 8.21 6.30 0.00
47.40 8.21 6.30 0.00
48.00 8.21 6.30 0.00
Rain Garden _1_Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADD 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 67
Summary for Pond F13-1: FOREBAY 1
Inflow Area = 4.670 ac, 42.18% Impervious, Inflow Depth = 6.30" for Eden 100 year event
Inflow = 50.41 cfs @ 11.96 hrs, Volume= 2.451 of
Outflow = 50.36 cfs @ 11.96 hrs, Volume= 2.371 af, Atten= 0%, Lag= 0.2 min
Primary = 50.36 cfs @ 11.96 hrs, Volume= 2.371 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Peak Elev= 526.41'@ 11.96 hrs Surf.Area= 2,292 sf Storage= 4,371 cf
Plug-Flow detention time= 32.2 min calculated for 2.369 of (97% of inflow)
Center-of-Mass det. time= 12.5 min ( 800.6 - 788.1 )
Volume Invert Avail.Storage Storage Description
#1 523.00' 5,829 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
523.00 386 0 0
524.00 864 625 625
525.00 1,413 1,139 1,764
526.00 2,018 1,716 3,479
527.00 2,681 2,350 5,829
Device Routing Invert Outlet Devices
#1 Primary 526.00' 70.0' long x 17.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Primary OutFlow Max=49.48 cfs @ 11.96 hrs HW=526.41' (Free Discharge)
L1=Broad-Crested Rectangular Weir (Weir Controls 49.48 cfs @ 1.73 fps)
0
Rain Garden-1-Post Type Il 24-hr Eden 100 year Rainfall=8.21"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 68
Pond FBA: FOREBAY 1
Hydrograph
_________,i_____._- _r--_____..,________._________I___.._-_..__
- l ¦ Inflow
55 - 5o aI Ms
1 ?. - -? - - - - - -- - - - - - ? ? - - - - ¦ Primary
50.36 ds
InflowlArea=4 tiT ac
50
-
i H
45 Peak_ E.lev52.6-.41'
40 g 71 cf
Story a=4 3
35-
30- 3
-° 25-
,-
20-
15'
10 --- - L----------------- - L----------- -
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
• Time (hours)
Pond FB-1: FOREBAY 1
Stage-Discharge
® Primary
m
m
c
0
m
w
0
cu ou +U ou ou to uu y0 100 110 120 130 140 150 160 170 180
Discharge (cfs)
Rain Garden _1_Post Type 1124-hr Eden 100 year Rainfall=8.21"
Prepared by WSP SELLS Printed 9110/2009
. HydroCAD® 9.00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 69
Pond FBA: FOREBAY 1
Stage-Area-Storage
Surface/Horizontal/wetted Area (sq-ft)
0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 ? Surface
® Storage
527
i
------------------- --------- - ------------ ------------
526
---
0 525 '
w
----------- ------ . - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
524-
523
0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 5,500
• Storage (cubic-feet)
is
Rain Garden-1-Post Type Il 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD@ 9.00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 70
Hydrograph for Pond FB-1: FOREBAY 1
Time Inflow Storage Elevation Primary
(hours) (cfs) (cubic-feet) (feet) (cfs)
0.00 0.00 0 523.00 0.00
1.50 0.00 0 523.00 0.00
3.00 0.00 0 523.00 0.00
4.50 0.04 35 523.09 0.00
6.00 0.16 547 523.91 0.00
7.50 0.30 1,780 525.01 0.00
9.00 0.61 3,512 526.02 0.61
10.50 1.24 3,545 526.03 1.23
12.00 42.28 4,284 526.38 43.51
13.50 1.79 3,569 526.04 1.80
15.00 1.12 3,540 526.03 1.13
16.50 0.81 3,523 526.02 0.81
18.00 0.67 3,515 526.02 0.67
19.50 0.53 3,508 526.01 0.54
21.00 0.46 3,504 526.01 0.47
22.50 0.44 3,503 526.01 0.44
24.00 0.41 3,501 526.01 0.41
25.50 0.00 3,479 526.00 0.00
27.00 0.00 3,479 526.00 0.00
28.50 0.00 3,479 526.00 0.00
30.00 0.00 3,479 526.00 0.00
31.50 0.00 3,479 526.00 0.00
33.00 0.00 3,479 526.00 0.00
34.50 0.00 3,479 526.00 0.00
36.00 0.00 3,479 526.00 0.00
37.50 0.00 3,479 526.00 0.00
39.00 0.00 3,479 526.00 0.00
40.50 0.00 3,479 526.00 0.00
42.00 0.00 3,479 526.00 0.00
43.50 0.00 3,479 526.00 0.00
45.00 0.00 3,479 526.00 0.00
46.50 0.00 3,479 526.00 0.00
48.00 0.00 3,479 526.00 0.00
0
Rain Garden-1-Post Type ll 24-hr Eden 100 year Rainfall=8.29"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 71
C
•
Elevation Primary
(feet) (cfs)
523.00 0.00
523.02 0.00
523.04 0.00
523.06 0.00
523.08 0.00
523.10 0.00
523.12 0.00
523.14 0.00
523.16 0.00
523.18 0.00
523.20 0.00
523.22 0.00
523.24 0.00
523.26 0.00
523.28 0.00
523.30 0.00
523.32 0.00
523.34 0.00
523.36 0.00
523.38 0.00
523.40 0.00
523.42 0.00
523.44 0.00
523.46 0.00
523.48 0.00
523.50 0.00
523.52 0.00
523.54 0.00
523.56 0.00
523.58 0.00
523.60 0.00
523.62 0.00
523.64 0.00
523.66 0.00
523.68 0.00
523.70 0.00
523.72 0.00
523.74 0.00
523.76 0.00
523.78 0.00
523.80 0.00
523.82 0.00
523.84 0.00
523.86 0.00
523.88 0.00
523.90 0.00
523.92 0.00
523.94 0.00
523.96 0.00
523.98 0.00
524.00 0.00
524.02 0.00
Stage-Discharge for Pond FB-1: FOREBAY 1
Elevation Primary
(feet) (Cfs)
524.04 0.00
524.06 0.00
524.08 0.00
524.10 0.00
524.12 0.00
524.14 0.00
524.16 0.00
524.18 0.00
524.20 0.00
524.22 0.00
524.24 0.00
524.26 0.00
524.28 0.00
524.30 0.00
524.32 0.00
524.34 0.00
524.36 0.00
524.38 0.00
524.40 0.00
524.42 0.00
524.44 0.00
524.46 0.00
524.48 0.00
524.50 0.00
524.52 0.00
524.54 0.00
524.56 0.00
524.58 0.00
524.60 0.00
524.62 0.00
524.64 0.00
524.66 0.00
524.68 0.00
524.70 0.00
524.72 0.00
524.74 0.00
524.76 0.00
524.78 0.00
524.80 0.00
524.82 0.00
524.84 0.00
524.86 0.00
524.88 0.00
524.90 0.00
524.92 0.00
524.94 0.00
524.96 0.00
524.98 0.00
525.00 0.00
525.02 0.00
525.04 0.00
525.06 0.00
Elevation Primary
(feet) (cfs)
525.08 0.00
525.10 0.00
525.12 0.00
525.14 0.00
525.16 0.00
525.18 0.00
525.20 0.00
525.22 0.00
525.24 0.00
525.26 0.00
525.28 0.00
525.30 0.00
525.32 0.00
525.34 0.00
525.36 0.00
525.38 0.00
525.40 0.00
525.42 0.00
525.44 0.00
525.46 0.00
525.48 0.00
525.50 0.00
525.52 0.00
525.54 0.00
525.56 0.00
525.58 0.00
525.60 0.00
525.62 0.00
525.64 0.00
525.66 0.00
525.68 0.00
525.70 0.00
525.72 0.00
525.74 0.00
525.76 0.00
525.78 0.00
525.80 0.00
525.82 0.00
525.84 0.00
525.86 0.00
525.88 0.00
525.90 0.00
525.92 0.00
525.94 0.00
525.96 0.00
525.98 0.00
526.00 0.00
526.02 0.53
526.04 1.50
526.06 2.76
526.08 4.24
526.10 5.93
Elevation Primary
(feet) (cfs)
526.12 7.80
526.14 9.83
526.16 12.01
526.18 14.33
526.20 16.78
526.22 19.37
526.24 22.09
526.26 24.93
526.28 27.88
526.30 30.94
526.32 34.11
526.34 37.39
526.36 40.76
526.38 44.24
526.40 47.81
526.42 51.44
526.44 55.16
526.46 58.97
526.48 62.85
526.50 66.82
526.52 70.87
526.54 75.00
526.56 79.20
526.58 83.48
526.60 87.84
526.62 92.06
526.64 96.34
526.66 100.66
526.68 105.04
526.70 109.46
526.72 113.93
526.74 118.44
526.76 123.00
526.78 127.59
526.80 132.23
526.82 137.17
526.84 142.16
526.86 147.22
526.88 152.32
526.90 157.49
526.92 162.70
526.94 167.97
526.96 173.30
526.98 178.67
527.00 184.10
Rain Garden _1_Post Type // 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 72
Stage-Area-Storage for Pond FB-1: FOREBAY 1
•

Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
523.00 386 0
523.05 410 20
523.10 434 41
523.15 458 63
523.20 482 87
523.25 506 111
523.30 529 137
523.35 553 164
523.40 577 193
523.45 601 222
523.50 625 253
523.55 649 285
523.60 673 318
523.65 697 352
523.70 721 387
523.75 745 424
523.80 768 462
523.85 792 501
523.90 816 541
523.95 840 582
524.00 864 625
524.05 891 669
524.10 919 714
524.15 946 761
524.20 974 809
524.25 1,001 858
524.30 1,029 909
524.35 1,056 961
524.40 1,084 1,015
524.45 1,111 1,069
524.50 1,139 1,126
524.55 1,166 1,183
524.60 1,193 1,242
524.65 1,221 1,303
524.70 1,248 1,364
524.75 1,276 1,427
524.80 1,303 1,492
524.85 1,331 1,558
524.90 1,358 1,625
524.95 1,386 1,694
525.00 1,413 1,764
525.05 1,443 1,835
525.10 1,474 1,908
525.15 1,504 1,982
525.20 1,534 2,058
525.25 1,564 2,136
525.30 1,594 2,215
525.35 1,625 2,295
525.40 1,655 2,377
525.45 1,685 2,461
525.50 1,716 2,546
525.55 1,746 2,632
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
525.60 1,776 2,720
525.65 1,806 2,810
525.70 1,837 2,901
525.75 1,867 2,993
525.80 1,897 3,087
525.85 1,927 3,183
525.90 1,957 3,280
525.95 1,988 3,379
526.00 2,018 3,479
526.05 2,051 3,581
526.10 2,084 3,684
526.15 2,117 3,789
526.20 2,151 3,896
526.25 2,184 4,004
526.30 2,217 4,114
526.35 2,250 4,226
526.40 2,283 4,339
526.45 2,316 4,454
526.50 2,350 4,571
526.55 2,383 4,689
526.60 2,416 4,809
526.65 2,449 4,931
526.70 2,482 5,054
526.75 2,515 5,179
526.80 2,548 5,306
526.85 2,582 5,434
526.90 2,615 5,564
526.95 2,648 5,695
527.00 2,681 5,829
Rain Garden _1_Post Type 1124-hr Eden 100 year Rainfall=8.21"
Prepared by WSP SELLS Printed 9/10/2009
. HydroCAD® 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 73
Summary for Pond RG-1: Rain Garden
Inflow Area = 4.670 ac, 42.18% Impervious, Inflow Depth = 6.09" for Eden 100 year event
Inflow = 50.36 cfs @ 11.96 hrs, Volume= 2.371 of
Outflow = 47.03 cfs @ 11.99 hrs, Volume= 2.203 af, Atten= 7%, Lag= 1.6 min
Primary = 47.03 cfs @ 11.99 hrs, Volume= 2.203 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Peak Elev= 525.92'@ 11.99 hrs Surf.Area= 8,797 sf Storage= 14,965 cf
Plug-Flow detention time= 59.4 min calculated for 2.201 of (93% of inflow)
Center-of-Mass det. time= 21.1 min ( 821.6 - 800.6 )
Volume Invert Avail.Storage Storage Description
#1 524.00' 25,073 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
524.00 6,816 0 0
525.00 7,820 7,318 7,318
526.00 8,882 8,351 15,669
527.00 9,925 9,404 25,073
is Device Routing Invert Outlet Devices
#1 Primary 525.00' 20.0' long x 12.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.57 2.62 2.70 2.67 2.66 2.67 2.66 2.64
Primary OutFlow Max=46.30 cfs @ 11.99 hrs HW=525.91' (Free Discharge)
L1=13road-Crested Rectangular Weir (Weir Controls 46.30 cfs @ 2.54 fps)
C,
Rain Garden _1Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WS_P SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 74
Pond RG-1: Rain Garden
Hydrograph
- -------- ----- -- -- - --r------- - --------- ---
¦Inflow
55 50.36 cfs
- - -
- - -- - ¦ Primary Inflow Area=42.67 0 ac
cfs P ? -ii.- ...
50 47.03
45 ?" - :Peak- Elev..=525.92'
'
40 t0ra a=14'965
g ;-cf
35 ;.
30
3
o
-
FL 2520
15 _ _ r r
--
;
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
Pond RGA: Rain Garden
Stage-Discharge
® Primary
m
m
w
c
0
m
w
0
0 20 40 60 80 100 120 140
Discharge (cfs)
Rain Garden _1_Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 75
Pond RG-1: Rain Garden
Stage-Area-Storage
Surface/Horizontal/Wetted Area (sq-ft)
1,000 2,000 3,000 4,000 5.000 6.000 7.000 8.000 9000
m
m
c
0
m
w
•
El Surface
® Storage
0
u 5,000 10,000 15,000 20,000 25,000
Storage (cubic-feet)
Rain Garden _1_Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 76
Hydrograph for Pond RG-1: Rain Garden
Time Inflow Storage Elevation Primary
(hours) (cfs) (cubic-feet) (feet) (cfs)
0.00 0.00 0 524.00 0.00
1.50 0.00 0 524.00 0.00
3.00 0.00 0 524.00 0.00
4.50 0.00 0 524.00 0.00
6.00 0.00 0 524.00 0.00
7.50 0.00 0 524.00 0.00
9.00 0.61 550 524.08 0.00
10.50 1.23 4,977 524.69 0.00
12.00 43.51 14,901 525.91 46.49
13.50 1.80 8,188 525.11 1.89
15.00 1.13 7,942 525.08 1.15
16.50 0.81 7,809 525.06 0.82
18.00 0.67 7,754 525.06 0.68
19.50 0.54 7,697 525.05 0.55
21.00 0.47 7,652 525.04 0.47
22.50 0.44 7,637 525.04 0.44
24.00 0.41 7,622 525.04 0.41
25.50 0.00 7,320 525.00 0.00
27.00 0.00 7,318 525.00 0.00
28.50 0.00 7,318 525.00 0.00
30.00 0.00 7,318 525.00 0.00
31.50 0.00 7,318 525.00 0.00
33.00 0.00 7,318 525.00 0.00
34.50 0.00 7,318 525.00 0.00
36.00 0.00 7,318 525.00 0.00
37.50 0.00 7,318 525.00 0.00
39.00 0.00 7,318 525.00 0.00
40.50 0.00 7,318 525.00 0.00
42.00 0.00 7,318 525.00 0.00
43.50 0.00 7,318 525.00 0.00
45.00 0.00 7,318 525.00 0.00
46.50 0.00 7,318 525.00 0.00
48.00 0.00 7,318 525.00 0.00
0
•
•
17_?
Rain Garden _1_Post Type 11 24-hr Eden 100 year Rainfall=8.21"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 77
Elevation Primary
Stage-Discharge for Pond RG-1: Rain Garden
Elevation Primary
Elevation Primary
(feet) (cfs)
524.00 0.00
524.02 0.00
524.04 0.00
524.06 0.00
524.08 0.00
524.10 0.00
524.12 0.00
524.14 0.00
524.16 0.00
524.18 0.00
524.20 0.00
524.22 0.00
524.24 0.00
524.26 0.00
524.28 0.00
524.30 0.00
524.32 0.00
524.34 0.00
524.36 0.00
524.38 0.00
524.40 0.00
524.42 0.00
524.44 0.00
524.46 0.00
524.48 0.00
524.50 0.00
524.52 0.00
524.54 0.00
524.56 0.00
524.58 0.00
524.60 0.00
524.62 0.00
524.64 0.00
524.66 0.00
524.68 0.00
524.70 0.00
524.72 0.00
524.74 0.00
524.76 0.00
524.78 0.00
524.80 0.00
524.82 0.00
524.84 0.00
524.86 0.00
524.88 0.00
524.90 0.00
524.92 0.00
524.94 0.00
524.96 0.00
524.98 0.00
525.00 0.00
525.02 0.15
(feet) (cfs)
525.04 0.41
525.06 0.76
525.08 1.16
525.10 1.63
525.12 2.14
525.14 2.69
525.16 3.29
525.18 3.93
525.20 4.60
525.22 5.31
525.24 6.07
525.26 6.85
525.28 7.67
525.30 8.53
525.32 9.41
525.34 10.33
525.36 11.28
525.38 12.25
525.40 13.26
525.42 14.31
525.44 15.39
525.46 16.50
525.48 17.64
525.50 18.81
525.52 20.01
525.54 21.24
525.56 22.50
525.58 23.78
525.60 25.10
525.62 26.33
525.64 27.59
525.66 28.86
525.68 30.15
525.70 31.45
525.72 32.77
525.74 34.11
525.76 35.46
525.78 36.83
525.80 38.21
525.82 39.64
525.84 41.08
525.86 42.54
525.88 44.02
525.90 45.51
525.92 47.02
525.94 48.54
525.96 50.08
525.98 51.63
526.00 53.20
526.02 54.82
526.04 56.47
526.06 58.12
(feet) (cfs)
526.08 59.80
526.10 61.49
526.12 63.20
526.14 64.92
526.16 66.67
526.18 68.42
526.20 70.20
526.22 71.93
526.24 73.68
526.26 75.44
526.28 77.22
526.30 79.00
526.32 80.80
526.34 82.61
526.36 84.44
526.38 86.28
526.40 88.13
526.42 89.95
526.44 91.79
526.46 93.64
526.48 95.50
526.50 97.37
526.52 99.25
526.54 101.13
526.56 103.03
526.58 104.94
526.60 106.86
526.62 108.87
526.64 110.89
526.66 112.93
526.68 114.97
526.70 117.03
526.72 119.10
526.74 121.19
526.76 123.28
526.78 125.39
526.80 127.51
526.82 129.64
526.84 131.78
526.86 133.94
526.88 136.10
526.90 138.28
526.92 140.47
526.94 142.67
526.96 144.88
526.98 147.11
527.00 149.34
•
Rain Garden _1_Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 78
Stage-Area-Storage for Pond RG-1: Rain Garden
•
•
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
524.00 6,816 0
524.05 6,866 342
524.10 6,916 687
524.15 6,967 1,034
524.20 7,017 1,383
524.25 7,067 1,735
524.30 7,117 2,090
524.35 7,167 2,447
524.40 7,218 2,807
524.45 7,268 3,169
524.50 7,318 3,534
524.55 7,368 3,901
524.60 7,418 4,270
524.65 7,469 4,642
524.70 7,519 5,017
524.75 7,569 5,394
524.80 7,619 5,774
524.85 7,669 6,156
524.90 7,720 6,541
524.95 7,770 6,928
525.00 7,820 7,318
525.05 7,873 7,710
525.10 7,926 8,105
525.15 7,979 8,503
525.20 8,032 8,903
525.25 8,086 9,306
525.30 8,139 9,712
525.35 8,192 10,120
525.40 8,245 10,531
525.45 8,298 10,945
525.50 8,351 11,361
525.55 8,404 11,780
525.60 8,457 12,201
525.65 8,510 12,625
525.70 8,563 13,052
525.75 8,617 13,482
525.80 8,670 13,914
525.85 8,723 14,349
525.90 8,776 14,786
525.95 8,829 15,226
526.00 8,882 15,669
526.05 8,934 16,114
526.10 8,986 16,562
526.15 9,038 17,013
526.20 9,091 17,466
526.25 9,143 17,922
526.30 9,195 18,381
526.35 9,247 18,842
526.40 9,299 19,305
526.45 9,351 19,772
526.50 9,404 20,240
526.55 9,456 20,712
Elevation Surface Storage
(feet) (sq-ft) (cubic-feet)
526.60 9,508 21,186
526.65 9,560 21,663
526.70 9,612 22,142
526.75 9,664 22,624
526.80 9,716 23,108
526.85 9,769 23,595
526.90 9,821 24,085
526.95 9,873 24,578
527.00 9,925 25,073
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Permit
(to be provided by DWQ)
OBOE W AT?c9QG
ems.
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name Dan River Combined Cycle Project
Contact person Robert Wylie
Phone number 704-382-4669
Date 9/10/2009
Drainage area number Wet Detention Pond #2
II. DESIGN INFORMATION
Site Characteristics
Drainage area 790,614 ft2
Impervious area, post-development 399,099 ft2
% impervious 50.48 %
Design rainfall depth 1.0 in
Storage Volume: Non-SA Waters
Minimum volume required 33,139 ft3 Insufficient required volume.
Volume provided 35,421 ft3 OK, volume provided is equal to or in excess of volume required.
Storage Volume: SA Waters
1.5' runoff volume ft3
Pre-development 1-yr, 24-hr runoff ft3
Post-development 1-yr, 24-hr runoff ft3
Minimum volume required 0 ft3
Volume provided ft3
Peak Flow Calculations
Is the pre/post control of the 1yr 24hr storm peak flow required?
1-yr, 24-hr rainfall depth
Rational C, pre-development
Rational C, post-development
Rainfall intensity: 1-yr, 24-hr storm
Pre-development 1-yr, 24-hr peak flow
Post-development 1-yr, 24-hr peak flow
Pre/Post 1-yr, 24-hr peak flow control
Elevations
Temporary pool elevation
Permanent pool elevation
SHWT elevation (approx. at the perm. pool elevation)
Top of 1Oft vegetated shelf elevation
Bottom of 1Oft vegetated shelf elevation
Sediment cleanout, top elevation (bottom of pond)
Sediment cleanout, bottom elevation
Sediment storage provided
Y (Y or N)
2.8 in
0.38 (unitless)
0.50 (unitless)
4.36 in/hr OK
2.46 ft3/sec
49.89 ft3/sec
47.43 ft3/sec
531.88 fmsl
530.50 fmsl
519.30 fmsl
531.00 fmsl
530.00 fmsl Data not needed for calculation option #1, but OK if provided.
526.50 fmsl
525.00 fmsl Data not needed for calculation option #1, but OK if provided.
1.50 ft
Is there additional volume stored above the state-required temp. pool?
Elevation of the top of the additional volume
f ?JJ
Y (Y or N)
531.8 fmsl Insufficient. Must equal the temp. pool elev. previously entered.
Form SW401-Wet Detention Basin-Rev.6-2/20/09 Parts I. & II. Design Summary, Page 1 of 2
Permit
(to be provided by DWQ)
II DESIGN INFORMATION
Surface Areas
Z
Area, temporary pool 29,588 ft
Area REQUIRED, permanent pool 21,742 ft2
SAIDA ratio 2.75 (unitless)
Area PROVIDED, permanent pool, Aperm-pool 24,906 ft OK
Area, bottom of 1 Oft vegetated shelf, Abot_shelf 22,095 ft
Area, sediment cleanout, top elevation (bottom of pond). Abol-pond 11,352 ft2
Volumes
Volume, temporary pool 35,421 ft3 OK
Volume, permanent pool, Vpermyod 86,832 ft3
Volume, forebay (sum of forebays if more than one forebay) 16,628 ft3
Forebay % of permanent pool volume 19.1% % OK
SAIDA Table Data
Design TSS removal 90 %
Coastal SAIDA Table Used? N (Y or N)
Mountain/Piedmont SAIDA Table Used? Y (Y or N)
SAIDA ratio 2.75 (unitless)
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-2b) Y (Y or N)
Volume, permanent pool, Vperm pool 86,832 ft' OK
Area provided, permanent pool, Apeno-pool 24,906 ft2 OK
Average depth calculated 3.48 ft OK
Average depth used in SAIDA, d., (Round to nearest 0.5ft) 3.5 ft OK
Calculation option 2 used? (See Figure 10-2b) (Y or N)
Area provided, permanent pool, Apermjod ft2
Area, bottom of 1 Oft vegetated shelf, Abot_shelf ft2
Area, sediment cleanout, top elevation (bottom of pond), Abol-pond 1
"Depth" (distance b/w bottom of 1 Oft shelf and top of sediment) ft
Average depth calculated ft
Average depth used in SAIDA, d,v, (Round to nearest 0.5ft) ft
Drawdown Calculations
Drawdown through orifice? Y (Y or N)
Diameter of orifice (if circular) 2.50 in
Area of orifice (if-non-circular) in2
Coefficient of discharge (CD) 0.60 (unitless)
Driving head (Ho) 0.43 ft
Drawdown through weir? N (Y or N)
Weir type (unitless)
Coefficient of discharge (CW) (unitless)
Length of weir (L) It
Driving head (H) It
Pre-development 1-yr, 24-hr peak flow 2.46 ft3/sec Insufficient pre-development peak flow.
Post-development 1-yr, 24-hr peak flow 2.27 ft3/sec OK
Storage volume discharge rate (through discharge orifice or weir) 0.19 ft3/sec
Storage volume drawdown time 2.31 days OK, draws down in 2-5 days.
Drawdown time varying from expected value by more than a half day.
Additional Information
Vegetated side slopes 3 :1 OK
Vegetated shelf slope 10 :1 OK
Vegetated shelf width 10.0 It OK
Length of flowpath to width ratio 3 :1 OK
Length to width ratio 2.0 :1 OK
Trash rack for overflow & orifice? Y (Y or N) OK
Freeboard provided 1.0 ft OK
Vegetated filter provided? N (Y or N) OK
Recorded drainage easement provided? Y (Y or N) OK
Capures all runoff at ultimate build-out? Y (Y or N) OK
Drain mechanism for maintenance or emergencies 8" DIP
Form SW401-Wet Detention Basin-Rev.6-2/20/09 Parts I. & il. Design Summary, Page 2 of 2
Permit No
(to be provided by DWQ)
•
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
•
•
Page/ Plan
in' ' Is Sheet No.
?. 1• 1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build-out,
- Off-site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Basin dimensions,
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
- Overflow device, and

JW_
C ?• 3 - Boundaries of drainage easement.
2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing:
Outlet structure with trash rack or similar,
- Maintenance access,
Permanent pool dimensions,
Forebay and main pond with hardened emergency spillway,
- Basin cross-section,
Vegetation specification for planting shelf, and

C^74 - Filter strip.
3
S
"
'
.
ection view of the wet detention basin (1
= 20
or larger) showing:
Side slopes, 3:1 or lower,
- Pretreatment and treatment areas, and
- Inlet and outlet structures.
C^7.0 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified

CALL on the plans prior to use as a wet detention basin.
5
A table of
l
ti
i
• .
e
eva
ons, areas,
ncremental volumes & accumulated volumes for overall pond and for forebay,

' to verify volume provided.
]•0
C' 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the
entire drainage area is stabilized.
CC 45 7. The supporting calculations.

` 8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
9
A
f
.
copy o
the deed restrictions (if required).

/ C 9 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
soil maps are not an acceptable source of soils information.
Form SW401-Wet Detention Basin-Rev.6-2/20/09
Part III. Required Items Checklist, Page 1 of 1
•

DAN RIVER COMBINED CYCLE PROJECT
DATE: September 10, 2009
WET POND 2
PRE
area 4.61 ac.
CN 74
tc 36.5 min.
RUNOFF
CFS VOLUME
AC-FT
1-Y 2.46 0.304
10-Y 8.46 0.939
25-Y 11.78 1.295
50-Y 14.69 1.610
100-Y 17.95 1.965
POST
area 18.15 ac.
CN 86
tc 5.0 min.
MAXIMUM

RUNOFF
CFS RUNOFF
VOLUME
AC-FT
OUTFLOW
CFS OUTFLOW
VOLUME
AC-FT
22
STORAGE
AC-FT
381
3 WATER
ELEVATION
FT
59
532
1-Y 49.89 2.270 1.84 1.5 .
033
5 .
69
534
Y
10 73
113 5.385 8.07 4.615 . .
-
25-Y .
145.16 6.986 13.72 6.209 5.921
369
6 535.65
12
536
50-Y 171.71 8.363 43.54 7.582 .
782
6 .
54
536
100-Y 200.66 9.884 92.49 9.100 . .

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Precipitation Frequency Data Server Page 1 of 3
(i) POINT PRECIPITATION
FREQUENCY ESTIMATES
FROM NOAA ATLAS 14
EDEN, NORTH CAROLINA (31-2631) 36.4742 N 79.7433 W 498 feet
from "Precipitation-Frequency Atlas of the United States" NOAA Atlas 14, Volume 2, Version 3
G.M. Bonnin, D. Martin, B. Lin, T. Parzybok, M.Yekta, and D. Riley
NOAA, National Weather Service, Silver Spring, Maryland, 2004
Extracted: Wed Jun 24 2009
Confidence Limits Seasonality Location Maps Other Info. GIS data Maps Docs Return to State Map
•
•
Precipitation Frequency Estimates (inches)
ARI*

(years) 5

min
_ min10
_ 15
mun 30
min 60
min 120
min. 3 hr 6 hr 12
hr
24_hr
48_hr
4 day_
7_day 10
day 20
day 30
day_ 45
aay_ 60
_d.ay
0.36 0.58 0.72 0.99 1.24 1.47 1.59 1.96 237 2.81 3.30 3.68 4.22 4.77 6.43 7.96 10.02 11.98
0 0.43 0.69 0.87 1.20 1.51 1.79 1.93 2.38 2.87 3.40 3.99 4.45 5.07 5.71 7.66 9.41 11.82 14.06
5 0.51 0.82 1.04 1.47 1.89 2.25 2.44 2.99 3.64 4.33 5.04 5.61 6.29 7.01 9.21 11.09 13.76 16.16
10 0.57 0.91 1.15 1.66 2.17 2.61 2.82 3.48 4.26 5.10 5.90 6.57 7.30 8.06 10.44 12.37 15.23 17.74
25 0.63 1.01 1.28 1.89 2.52 3.08 3.33 4.15 5.16 6.22 7.12 7.92 8.72 9.54 12.11 14.04 17.11 19.75
50 0.68 1.07 1.36 2.05 2.78 3.44 3.72 4.70 5.89 7.17 8.14 9.05 9.89 10.74 13.42 15.32 18.52121 23
100 0.72 1.14 1.44 2.20 3.03 3.82 4.13 5.27 6.70 8.21 9.22 10.25 11.13 11.99 14.76 16.56 19.87 22.64
200 0.75 1.19 1.50 2.34 3.28 4.19 4.53 5.86 7.55 9.34 10.38 11.54 12.46 13.30 16.11 17.78 21.17 23.98
500 0.79 1.25 F15-8]E] 3.60 4.69 5.07 6.70 8.80 11.00 12.07 13.39 14.35 15.15 17.95 19.38 22.85 25.67
1000 0.82 1.29 1.62 2.63 3.84 5.08 5.48 7.36 9.82 12.41 13.46 14.93 15.89 16.63 19.37 20.57 24.08 26.89
' These precipitation frequency estimates are based on a partial duration series. ARI is the Average Recurrence Interval.
Please refer to NOAA Atlas 14 Document for more information. NOTE: Formatting forces estimates near zero to appear as zero.
* Upper bound of the 90% confidence interval
Precipitation Frequency Estimates (inches)
ARI** 5 10 15 30 60 120 F
G12 24 4F -1 8 4 7 10 20 30 45 60 F -1
F
miin min
jjjj min min r hr hr hr hr
h
ay day day 11 day 11 day 11 day 11 day
0.40 0.63 0.79 1.09 1.35 1.61 1.73 2.15 2.59 3.04 3.55 3.97 4.51 5.10 6.85 8.42 10.60 12.61
0.47 0.76 0.95 1.31 1.65 1.96 2.11 2.61 3.14 3.67 4.30 4.80 5.42 6.10 8.16 9.96 12.50 14.81
0.56 0.90 1.14 1.61 2.07 2.46 2.66 3.28 F396-][4 66 5.41 6.05 6.72 7.48 9.81 11.73 14.54 17.01
10 0.62 0.99 1.25 1.81 2.36 2.84 3.07 3.80 4.62 5.48 6.32 7.06 7.78 8.60 11.11 13.07 16.07 18.67
25 0.69 1.09 1.39 2.06 2.74 3.35 3.62 4.52 5.57 6.68 7.63 8.51 9.28 10.16 12.89 14.85 18.06 20.77
50 0.73 1.17 1.48 2.23 3.02 3.74 4.04 5.11 6.36 7.69 8.71 9.72 10.53 11.43 14.30 16.19 19.56 22.34
100 0.78 1.24 1.56 2.40 3.30 4.15 4.47 5.72 7.20 8.80 9.88 11.02 11.87 12.79 15.73 17.52 21.01 23.83
200 0.82 1.30 1.64 2.55 3.58 4.55 4.90 6.36 8.10 10.01 11.14 12.43 13.30 14.21 17.20 18.84 22.42 25.27
500 0.86 1.37 1.72 2.74 3.93 5.10 5.49 7.27 9.45 11.80 13.00 14.46 15.37 16.23 19.21 20.59 24.24 27.11
1000 0.90 1.41 1.77 2.87 4.19 5.53 5.95 7.99 10.55 13.34 14.55 16.16 17.08 17.88 20.79 21.93 25.61 28.46
i de upper uuunu ui the confidence mtervai at 90% confidence level is the value wnicn b% or the simulated quantile values for a given frequency are greater than.
"These precipitation frequency estimates are based on a partial duration series. ARI is the Average Recurrence Interval.
Please refer to NOAA Atlas 14 Document for more information. NOTE: Formatting prevents estimates near zero to appear as zero.
* Lower bound of the 90% confidence interval
Precipitation Frequency Estimates (inches)
ARI** 5 10 15 30 60 120 Fh 6 12 24 48 4 7 10 20 30 45 60
(years) min in min min min min hr hr
11 11 J[ I hr hr day day day 11 day 11 day 11 day 11 day
0.33 0.53 0.66 0.91 1.13 1.35 1.46 1.80 2.18 2.61 3.08 3.43 3.96 4.48 6.05 7.54 9.48 11.39
0.40 0.63 0.80 1.10 1.38116 4 1.78 2.19 2.64 3.16 3.72 4.15 4.75 5.37 7.21 8.91 11.18 13.37
0 0.47 0.75 0.95 1.35 1.73 2.06 2.24 2.74 3.33 4.02 4.70 5.23 5.89 6.58 8.66 10.49 13.01 15.36
10 0.52 0.83 1.05 1.52 1798 2.38 2.58 3.18 3.88 4.72 5.48 6.10 6.82 7.55 9.79 11.68 14.38 16.84
25 0.57 0.92 1.16 1.72 2.29 2.80 3.03 3.76 4.66 5.73 6.59 7.33 8.11 8.89 11.32 13.23 16.13 18.71
50 0.61 0.97 1.23 1.85 2.51 3.12 3.38 4.22 5.29 6.56 7.49 8.32 9.15 9.97 12.51 14.39 17.42 20.06
100 0.65 1.02 1.30 1.99 2.73 3.43 3.72 4.70 5.94 7.45 8.43 9.37 10.25 11.08 13.70 15.52 18.64 21.36
200 0.68 1.07 1.35 2.10 2.95 3.74 4.05 5.17 6.62 8.41 9.42 10.46 11.39 12.21 14.88 16.62 19.81 22.57
500 0.71 1.12 1.41 2.24 3.21 4.14 4.48 5.82 7.56 9.77 10.83 12.02 12.96 13.79 16.44 18.00 21.29 24.07
1000 0.73 1.14 1.44 2.33 3.39 4.44 4.80 6.30 8.30 10.89 11.96 13.27 14.24 15.02 17.64 19.03 22.35 25.13
fie rower uuunu ui me uun idence mtervai at au% connpence level is the value which 5% of the simulated quanhle values for a given frequency are less than.
http://dipper.nws.noaa. gov/cgi-binlhdsc/buildout.perl?type=pf&units=us&series=pd&state... 6/24/2009
NCDENR Stormwater BMP Manual Chapter Revised 09-28-07
Table 10-1
Surface Area to Drainage Area Ratio for Permanent Pool Sizing to Achieve 85 Percent TSS
Pollutant Removal Efficiency in the Mountain and Piedmont Regions, Adapted from Driscoll, 1986
Percent
Impervious
Cover

3.0

4.0 Permanent Pool Average Depth (ft)

5.0 6.0 7.0

8.0

9.0
10% 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20% 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30% 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40% 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50% 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60% 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70% 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80% 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90% 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Table 10-2
Surface Area to Drainage Area Ratio for Permanent Pool Sizing to Achieve 85 Percent TSS
Pollutant Removal Efficiency in the Coastal Region, Adapted from Driscoll, 1986

•
Percent
Impervious
Cover

3.0

3.5

4.0 Permanent Pool Average Depth (ft)

4.5 5.0 5.5 6.0

6.5

7.0

7.5'
10% 0.9 0.8 0.7 0.6 0.5 0 0 0 0 0
20% 1.7 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5
30% 2.5 2.2 1.9 1.8 1.6 1.5 1.3 1.2 1.0 0.9
40% 3.4 3.0 2.6 2.4 2.1 1.9 1.6 1.4 1.1 1.0
50% 4.2 3.7 3.3 3.0 2.7 2.4 2.1 1.8 1.5 1.3
60% 5.0 4.5 3.8 3.5 3.2 2.9 2.6 2.3 2.0 1.6
70% 6.0 5.2 4.5 4.1 3.7 3.3a 2.9 2.5 2.1 1.8
80% 6.8 6.0 5.2 4.7 4.2 3.7 3.2 2.7 2.2 2.0
90% 7.5 6.5 5.8 5.3 4.8 4.3 3.8 3.3 2.8 1.3
100% 8.2 7.4 6.8 6.2 5.6 5.0 4.4 3.8 3.2 2.6
Table 10-3
Surface Area to Drainage Area Ratio for Permanent Pool Sizing to Achieve 90 Percent TSS
Pollutant Removal Efficiency in the Mountain and Piedmont Regions, Adapted from Driscoll, 1986
Percent
Impervious
Cover

3.0

3.5

4.0 Permanent Pool Average Depth (ft)

4.5 5.0 5.5 6.0 6.5 7.0

7.5

8.0

8.5

9.0
10% 0.9 0.8 0.8 0.7 0.6 0.6 0.5 0.5 0.5 0.5 0.4 0.4 0.4
20% 1.5 1.3 1.1 1.0 1.0 0.9 0.9 0.9 0.8 0.8 0.8 0.7 0.7
30% 1.9 1.8 1.7 1.5 1.4 1.4 1.3 1.1 1.0 1.0 1.0 0.9 0.9
40% 2.5 2.3 2.0 1.9 1.8 1.7 1.6 1.6 1.5 1.4 1.3 1.2 1.1
50% 3.0 2.8 2.5 2.3 2.0 1.9 1.9 1.8 1.7 1.6 1.6 1.5 1.5
60% 3.5 3.2 2.8 2.7 2.5 2.4 2.2 2.1 1.9 1.9 1.8 1.8 1.7
70% 4.0 3.7 3.3 3.1 2.8 2.7 2.5 2.4 2.2 2.1 2.0 2.0 1.9
80% 4.5 4.1 3.8 3.5 3.3 3.0 2.8 2.7 2.6 2.4 2.3 2.1 2.0
90% 5.0 4.5 4.0 3.8 3.5 3.3 3.0 2.9 2.8 2.7 2.6 2.5 2.4
Wet Detention Basin 10-9 July 2007
•
•
E
DA2
Pre
Subca# Reach on Link Drainage Diagram for Pond _2_Pre
Prepared by WSP SELLS, Printed 7/7/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC
Pond-2-Pre Printed 7/7/2009
Prepared by WSP SELLS Page 2
is HydroCAD®9 00 s/n 04719 © 2009 HydroCAD Software Solutions LLC
Area Listing (all nodes)
Area CN Description
(acres) (subcatchment-numbers)
4.610 74 >75% Grass cover, Good, HSG C (DA2)
4.610 TOTAL AREA
•
0
Pond 2 Pre
Prepared by WSP SELLS Printed 7/7/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 3
Soil Listing (all nodes)
Area
(acres) Soil
Goup Subcatchment
Numbers
0.000 HSG A
0.000 HSG B
4.610 HSG C DA2
0.000 HSG D
0.000 Other
4.610 TOTAL AREA
•
0
Pond-2-Pre Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 7/7/2009
HydroCAD®9 00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 4
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA2: Pre Runoff Area=4.610 ac 0.00% Impervious Runoff Depth=0.79"
Flow Length=516' Tc=36.5 min CN=74 Runoff=2.46 cfs 0.304 of
Total Runoff Area = 4.610 ac Runoff Volume = 0.304 of Average Runoff Depth = 0.79"
100.00% Pervious= 4.610 ac 0.00% Impervious= 0.000 ac
•
0
•
Pond-2-Pre Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 7/7/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 5
Summary for Subcatchment DA2: Pre
Runoff = 2.46 cfs @ 12.36 hrs, Volume= 0.304 af, Depth= 0.79"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 1 year Rainfall=2.81"
Area (ac) CN Description
4.610 74 >75% Grass cover, Good, HSG C
4.610 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
_(min) (feet) (ft/ft) (ft/sec) (cfs)
35.7 300 0.0467 0.14 Sheet Flow,
Woods: Light underbrush n= 0.400 P2= 3.40"
0.8 216 0.0780 4.50 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
36.5 516 Total
Subcatchment DA2: Pre
Hydrograph
•
N
3
0
C
2

Type 1124 hrEden
1 yea r
Rainfall 2.81
Runoff Area=4.610 ac
Runoff V61ume=;0.304 of
Runoff Depth-0.79 Flow Length=516'
Tc=36.5 min
CN=74
®Runoff
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
111,
u
Pond-2-Pre Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 7/7/2009
H ydroCADO 9.00 s/n 04719 C 2009 HydroCAD Software Solutions LLC Page 6
Hydrograph for Subcatchment DA2: Pre
•
•
Time Precip. Excess Runoff
(hours) ( inches) ( inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.02 0.00 0.00
1.20 0.04 0.00 0.00
1.80 0.06 0.00 0.00
2.40 0.08 0.00 0.00
3.00 0.10 0.00 0.00
3.60 0.12 0.00 0.00
4.20 0.14 0.00 0.00
4.80 0.17 0.00 0.00
5.40 0.20 0.00 0.00
6.00 0.22 0.00 0.00
6.60 0.26 0.00 0.00
7.20 0.29 0.00 0.00
7.80 0.32 0.00 0.00
8.40 0.36 0.00 0.00
9.00 0.41 0.00 0.00
9.60 0.47 0.00 0.00
10.20 0.53 0.00 0.00
10.80 0.62 0.00 0.00
11.40 0.76 0.00 0.00
12.00 1.86 0.29 0.52
12.60 2.09 0.39 1.77
13.20 2.20 0.45 0.62
13.80 2.28 0.49 0.38
14.40 2.34 0.52 0.28
15.00 2.40 0.55 0.24
15.60 2.45 0.58 0.21
16.20 2.49 0.60 0.18
16.80 2.52 0.62 0.17
17.40 2.56 0.64 0.15
18.00 2.59 0.66 0.14
18.60 2.62 0.68 0.13
19.20 2.64 0.69 0.12
19.80 2.67 0.70 0.11
20.40 2.69 0.72 0.10
21.00 2.71 0.73 0.10
21.60 2.73 0.74 0.10
22.20 2.75 0.75 0.10
22.80 2.77 0.77 0.09
23.40 2.79 0.78 0.09
24.00 2.81 0.79 0.09
24.60 2.81 0.79 0.03
25.20 2.81 0.79 0.00
25.80 2.81 0.79 0.00
26.40 2.81 0.79 0.00
27.00 2.81 0.79 0.00
27.60 2.81 0.79 0.00
28.20 2.81 0.79 0.00
28.80 2.81 0.79 0.00
29.40 2.81 0.79 0.00
30.00 2.81 0.79 0.00
30.60 2.81 0.79 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 2.81 0.79 0.00
31.80 2.81 0.79 0.00
32.40 2.81 0.79 0.00
33.00 2.81 0.79 0.00
33.60 2.81 0.79 0.00
34.20 2.81 0.79 0.00
34.80 2.81 0.79 0.00
35.40 2.81 0.79 0.00
36.00 2.81 0.79 0.00
36.60 2.81 0.79 0.00
37.20 2.81 0.79 0.00
37.80 2.81 0.79 0.00
38.40 2.81 0.79 0.00
39.00 2.81 0.79 0.00
39.60 2.81 0.79 0.00
40.20 2.81 0.79 0.00
40.80 2.81 0.79 0.00
41.40 2.81 0.79 0.00
42.00 2.81 0.79 0.00
42.60 2.81 0.79 0.00
43.20 2.81 0.79 0.00
43.80 2.81 0.79 0.00
44.40 2.81 0.79 0.00
45.00 2.81 0.79 0.00
45.60 2.81 0.79 0.00
46.20 2.81 0.79 0.00
46.80 2.81 0.79 0.00
47.40 2.81 0.79 0.00
48.00 2.81 0.79 0.00
Pond-2-Pre Type // 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 7/7/2009
• HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 7
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA2: Pre Runoff Area=4.610 ac 0.00% Impervious Runoff Depth=2.44"
Flow Length=516' Tc=36.5 min CN=74 Runoff=8.46 cfs 0.939 of
Total Runoff Area = 4.610 ac Runoff Volume = 0.939 of Average Runoff Depth = 2.44"
100.00% Pervious = 4.610 ac 0.00% Impervious= 0.000 ac
•
0
Pond-2-Pre Type 11 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 7/7/2009
. HydroCADO 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 88
Summary for Subcatchment DA2: Pre
Runoff = 8.46 cfs @ 12.33 hrs, Volume= 0.939 af, Depth= 2.44"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 10 year Rainfall=5.10"
Area (ac) CN Description
4.610 74 >75% Grass cover, Good, HSG C
4.610 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
35.7 300 0.0467 0.14 Sheet Flow,
Woods: Light underbrush n= 0.400 P2= 3.40"
0.8 216 0.0780 4.50 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
36.5 516 Total
•
•
Fl-
L-1
Pond-2-Pre Type // 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 7/7/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 9
Hydrograph for Subcatchment DA2: Pre
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.03 0.00 0.00
1.20 0.06 0.00 0.00
1.80 0.10 0.00 0.00
2.40 0.14 0.00 0.00
3.00 0.18 0.00 0.00
3.60 0.22 0.00 0.00
4.20 0.26 0.00 0.00
4.80 0.31 0.00 0.00
5.40 0.35 0.00 0.00
6.00 0.41 0.00 0.00
6.60 0.46 0.00 0.00
7.20 0.53 0.00 0.00
7.80 0.59 0.00 0.00
8.40 0.66 0.00 0.00
9.00 0.75 0.00 0.00
9.60 0.85 0.01 0.02
10.20 0.97 0.02 0.07
10.80 1.13 0.05 0.16
11.40 1.38 0.11 0.35
12.00 3.38 1.16 2.76
12.60 3.79 1.45 5.57
13.20 4.00 1.59 1.74
13.80 4.14 1.70 0.99
14.40 4.25 1.79 0.72
15.00 4.35 1.86 0.61
15.60 4.44 1.92 0.54
16.20 4.51 1.98 0.46
16.80 4.58 2.03 0.41
17.40 4.64 2.08 0.38
18.00 4.70 2.13 0.36
18.60 4.75 2.17 0.33
19.20 4.80 2.20 0.31
19.80 4.84 2.24 0.28
20.40 4.88 2.27 0.25
21.00 4.92 2.30 0.24
21.60 4.96 2.33 0.23
22.20 4.99 2.36 0.23
22.80 5.03 2.39 0.22
23.40 5.07 2.42 0.22
24.00 5.10 2.44 0.21
24.60 5.10 2.44 0.08
25.20 5.10 2.44 0.01
25.80 5.10 2.44 0.00
26.40 5.10 2.44 0.00
27.00 5.10 2.44 0.00
27.60 5.10 2.44 0.00
28.20 5.10 2.44 0.00
28.80 5.10 2.44 0.00
29.40 5.10 2.44 0.00
30.00 5.10 2.44 0.00
30.60 5.10 2.44 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 5.10 2.44 0.00
31.80 5.10 2.44 0.00
32.40 5.10 2.44 0.00
33.00 5.10 2.44 0.00
33.60 5.10 2.44 0.00
34.20 5.10 2.44 0.00
34.80 5.10 2.44 0.00
35.40 5.10 2.44 0.00
36.00 5.10 2.44 0.00
36.60 5.10 2.44 0.00
37.20 5.10 2.44 0.00
37.80 5.10 2.44 0.00
38.40 5.10 2.44 0.00
39.00 5.10 2.44 0.00
39.60 5.10 2.44 0.00
40.20 5.10 2.44 0.00
40.80 5.10 2.44 0.00
41.40 5.10 2.44 0.00
42.00 5.10 2.44 0.00
42.60 5.10 2.44 0.00
43.20 5.10 2.44 0.00
43.80 5.10 2.44 0.00
44.40 5.10 2.44 0.00
45.00 5.10 2.44 0.00
45.60 5.10 2.44 0.00
46.20 5.10 2.44 0.00
46.80 5.10 2.44 0.00
47.40 5.10 2.44 0.00
48.00 5.10 2.44 0.00
Pond _2_Pre Type 1124-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 7/7/2009
HvdroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 10
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA2: Pre Runoff Area=4.610 ac 0.00% Impervious Runoff Depth=3.37"
Flow Length=516' Tc=36.5 min CN=74 Runoff=11.78 cfs 1.295 of
Total Runoff Area = 4.610 ac Runoff Volume = 1.295 of Average Runoff Depth = 3.37'
100.00% Pervious= 4.610 ac 0.00% Impervious= 0.000 ac
•
0
Pond _2_Pre Type 11 24-hr Eden 25 year Rainfall=6.22"
0 Prepared by WSP SELLS Printed 7/7/2009
HydroCAD®9 00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 11
Summary for Subcatchment DA2: Pre
Runoff = 11.78 cfs @ 12.32 hrs, Volume= 1.295 af, Depth= 3.37"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 25 year Rainfall=6.22"
Area (ac) CN Description
4.610 74 >75% Grass cover, Good, HSG C
4.610 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
7
35 300 0.0467 0.14 Sheet Flow,
. Woods: Light underbrush n= 0.400 P2= 3.40"
0.8 216 0.0780 4.50 Shallow Concentrated Flow,
Unsaved Kv= 16.1 fps
36.5 516 Total
Subcatchment DA2: Pre
Hydrograph

13 -- - - -
-- --
®Runoff
12 ff.?e?
Ypfs
-T a 11 24-hr,-Eden-
25 year
10

`
thw6-.22'
Rarnfa
9
--
Runoff Area=4.610 ac

H - -Runoff^Volum,e - --
,1.295 of
0 6 Runoff Depth=3.37," -
5
Flow Length=516'_
4 Tc=36.5 min
3
CN7
2 .

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)

Pond-2-Pre Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 7/7/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 12
Hydrograph for Subcatchment DA2: Pre
•
•
Time Precip. Excess Runoff
(hours) ( inches) ( inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.04 0.00 0.00
1.20 0.08 0.00 0.00
1.80 0.12 0.00 0.00
2.40 0.17 0.00 0.00
3.00 0.21 0.00 0.00
3.60 0.26 0.00 0.00
4.20 0.32 0.00 0.00
4.80 0.37 0.00 0.00
5.40 0.43 0.00 0.00
6.00 0.50 0.00 0.00
6.60 0.57 0.00 0.00
7.20 0.64 0.00 0.00
7.80 0.72 0.00 0.00
8.40 0.81 0.00 0.01
9.00 0.91 0.01 0.05
9.60 1.03 0.03 0.10
10.20 1.18 0.06 0.17
10.80 1.38 0.11 0.31
11.40 1.69 0.22 0.60
12.00 4.12 1.69 4.09
12.60 4.62 2.07 7.62
13.20 4.87 2.26 2.33
13.80 5.05 2.41 1.31
14.40 5.19 2.52 0.95
15.00 5.31 2.61 0.80
15.60 5.41 2.70 0.70
16.20 5.50 2.77 0.60
16.80 5.58 2.84 0.54
17.40 5.66 2.90 0.50
18.00 5.73 2.96 0.46
18.60 5.79 3.01 0.43
19.20 5.85 3.06 0.40
19.80 5.90 3.11 0.36
20.40 5.95 3.15 0.33
21.00 6.00 3.19 0.31
21.60 6.05 3.22 0.30
22.20 6.09 3.26 0.30
22.80 6.14 3.30 0.29
23.40 6.18 3.34 0.28
24.00 6.22 3.37 0.28
24.60 6.22 3.37 0.10
25.20 6.22 3.37 0.01
25.80 6.22 3.37 0.00
26.40 6.22 3.37 0.00
27.00 6.22 3.37 0.00
27.60 6.22 3.37 0.00
28.20 6.22 3.37 0.00
28.80 6.22 3.37 0.00
29.40 6.22 3.37 0.00
30.00 6.22 3.37 0.00
30.60 6.22 3.37 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 6.22 3.37 0.00
31.80 6.22 3.37 0.00
32.40 6.22 3.37 0.00
33.00 6.22 3.37 0.00
33.60 6.22 3.37 0.00
34.20 6.22 3.37 0.00
34.80 6.22 3.37 0.00
35.40 6.22 3.37 0.00
36.00 6.22 3.37 0.00
36.60 6.22 3.37 0.00
37.20 6.22 3.37 0.00
37.80 6.22 3.37 0.00
38.40 6.22 3.37 0.00
39.00 6.22 3.37 0.00
39.60 6.22 3.37 0.00
40.20 6.22 3.37 0.00
40.80 6.22 3.37 0.00
41.40 6.22 3.37 0.00
42.00 6.22 3.37 0.00
42.60 6.22 3.37 0.00
43.20 6.22 3.37 0.00
43.80 6.22 3.37 0.00
44.40 6.22 3.37 0.00
45.00 6.22 3.37 0.00
45.60 6.22 3.37 0.00
46.20 6.22 3.37 0.00
46.80 6.22 3.37 0.00
47.40 6.22 3.37 0.00
48.00 6.22 3.37 0.00
Pond-2-Pre Type 1124-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 7/7/2009
• HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 13
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA2: Pre Runoff Area=4.610 ac 0.00% Impervious Runoff Depth=4.19"
Flow Length=516' Tc=36.5 min CN=74 Runoff=14.69 cfs 1.610 of
Total Runoff Area = 4.610 ac Runoff Volume = 1.610 of Average Runoff Depth = 4.19"
100.00% Pervious =4.610 ac 0.00% Impervious= 0.000 ac
C7

Pond _2_Pre Type 11 24-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 7/7/2009
HydroCAD89 00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 14
Summary for Subcatchment DA2: Pre
Runoff = 14.69 cfs @ 12.32 hrs, Volume= 1.610 af, Depth= 4.19"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 50 year Rainfall=7.17"
Area (ac) CN Description
4.610 74 >75% Grass cover, Good, HSG C
4.610 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
35.7 300 0.0467 0.14 Sheet Flow,
Woods: Light underbrush n= 0.400 P2= 3.40"
0.8 216 0.0780 4.50 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
36.5 516 Total
Subcatchment DA2: Pre
.7
Hydrograph
- _ ®Runoff
16
15 14.69 ds
-Type-11 24 hr-Eden-
14
- 50-year- -
13
12
Rainfall-=7.17"
11 '
Runoff Area=4.610 ac
10
"t 9* Runoff Volume=1.610 of
3 Runoff Depth-4.19 6 Flow Len tl .=516' ..
5-
: i Tc=36:5 min
4 CN=74
0 2 4 6 8 10 12 1,4 1,6 1,8 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
0

Pond _2_Pre Type 1124-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 7/7/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 15
Hydrograph for Subcatchment DA2: Pre
r?
L`
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.04 0.00 0.00
1.20 0.09 0.00 0.00
1.80 0.14 0.00 0.00
2.40 0.19 0.00 0.00
3.00 0.25 0.00 0.00
3.60 0.30 0.00 0.00
4.20 0.36 0.00 0.00
4.80 0.43 0.00 0.00
5.40 0.50 0.00 0.00
6.00 0.57 0.00 0.00
6.60 0.65 0.00 0.00
7.20 0.74 0.00 0.00
7.80 0.83 0.00 0.02
8.40 0.93 0.01 0.05
9.00 1.05 0.03 0.11
9.60 1.19 0.06 0.19
10.20 1.36 0.10 0.27
10.80 1.59 0.18 0.46
11.40 1.95 0.33 0.84
12.00 4.75 2.17 5.29
12.60 5.33 2.63 9.40
13.20 5.62 2.87 2.83
13.80 5.82 3.04 1.58
14.40 5.98 3.17 1.14
15.00 6.12 3.29 0.96
15.60 6.24 3.39 0.84
16.20 6.34 3.47 0.72
16.80 6.44 3.55 0.64
17.40 6.52 3.63 0.60
18.00 6.60 3.70 0.56
18.60 6.68 3.76 0.51
19.20 6.75 3.82 0.47
19.80 6.81 3.87 0.43
20.40 6.86 3.92 0.39
21.00 6.92 3.97 0.37
21.60 6.97 4.02 0.36
22.20 7.02 4.06 0.35
22.80 7.07 4.11 0.35
23.40 7.12 4.15 0.34
24.00 7.17 4.19 0.33
24.60 7.17 4.19 0.12
25.20 7.17 4.19 0.01
25.80 7.17 4.19 0.00
26.40 7.17 4.19 0.00
27.00 7.17 4.19 0.00
27.60 7.17 4.19 0.00
28.20 7.17 4.19 0.00
28.80 7.17 4.19 0.00
29.40 7.17 4.19 0.00
30.00 7.17 4.19 0.00
30.60 7.17 4.19 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 7.17 4.19 0.00
31.80 7.17 4.19 0.00
32.40 7.17 4.19 0.00
33.00 7.17 4.19 0.00
33.60 7.17 4.19 0.00
34.20 7.17 4.19 0.00
34.80 7.17 4.19 0.00
35.40 7.17 4.19 0.00
36.00 7.17 4.19 0.00
36.60 7.17 4.19 0.00
37.20 7.17 4.19 0.00
37.80 7.17 4.19 0.00
38.40 7.17 4.19 0.00
39.00 7.17 4.19 0.00
39.60 7.17 4.19 0.00
40.20 7.17 4.19 0.00
40.80 7.17 4.19 0.00
41.40 7.17 4.19 0.00
42.00 7.17 4.19 0.00
42.60 7.17 4.19 0.00
43.20 7.17 4.19 0.00
43.80 7.17 4.19 0.00
44.40 7.17 4.19 0.00
45.00 7.17 4.19 0.00
45.60 7.17 4.19 0.00
46.20 7.17 4.19 0.00
46.80 7.17 4.19 0.00
47.40 7.17 4.19 0.00
48.00 7.17 4.19 0.00
Pond-2-Pre Type II 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 7/7/2009
Page 16
HydroCAD®9 00 s/n 04719 © 2009 HydroCAD Software Solutions LLC
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA2: Pre Runoff Area=4.610 ac 0.00% Impervious Runoff Depth=5.11"
Flow Length=516' Tc=36.5 min CN=74 Runoff=17.95 cfs 1.965 of
Total Runoff Area = 4.610 ac Runoff Volume = 1.965 of Average Runoff Depth = 5.11"
100.00% Pervious= 4.610 ac 0.00% Impervious= 0.000 ac
•
0
Pond-2-Pre Type ll 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 7/7/2009
Is HydroCAD®9 00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 17
Summary for Subcatchment DA2: Pre
Runoff = 17.95 cfs @ 12.31 hrs, Volume= 1.965 af, Depth= 5.11"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 100 year Rainfall=8.21"
Area ac CN Description
4.610 74 >75% Grass cover, Good, HSG C
4.610 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min feet ft/ft ft/sec cfs
35.7 300 0.0467 0.14 Sheet Flow,
Woods: Light underbrush n= 0.400 P2= 3.40"
8 216
0 0.0780 4.50 Shallow Concentrated Flow,
. Unpaved Kv= 16.1 fps
36.5 516 Total
Subcatchment DA2: Pre
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 4
Time (hours)
0
Pond-2-Pre Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 7/7/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 18
Hydrograph for Subcatchment DA2: Pre
•
is
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.05 0.00 0.00
1.20 0.10 0.00 0.00
1.80 0.16 0.00 0.00
2.40 0.22 0.00 0.00
3.00 0.28 0.00 0.00
3.60 0.35 0.00 0.00
4.20 0.42 0.00 0.00
4.80 0.49 0.00 0.00
5.40 0.57 0.00 0.00
6.00 0.66 0.00 0.00
6.60 0.75 0.00 0.00
7.20 0.85 0.01 0.02
7.80 0.95 0.02 0.06
8.40 1.06 0.03 0.11
9.00 1.21 0.06 0.19
9.60 1.37 0.11 0.29
10.20 1.56 0.17 0.40
10.80 1.82 0.27 0.64
11.40 2.23 0.46 1.12
12.00 5.44 2.72 6.64
12.60 6.10 3.27 11.37
13.20 6.43 3.55 3.38
13.80 6.67 3.75 1.87
14.40 6.85 3.91 1.35
15.00 7.01 4.05 1.13
15.60 7.14 4.17 0.99
16.20 7.26 4.27 0.85
16.80 7.37 4.37 0.76
17.40 7.47 4.45 0.70
18.00 7.56 4.54 0.65
18.60 7.65 4.61 0.61
19.20 7.72 4.68 0.56
19.80 7.79 4.74 0.51
20.40 7.86 4.80 0.46
21.00 7.92 4.85 0.44
21.60 7.98 4.91 0.43
22.20 8.04 4.96 0.42
22.80 8.10 5.01 0.41
23.40 8.16 5.06 0.40
24.00 8.21 5.11 0.39
24.60 8.21 5.11 0.14
25.20 8.21 5.11 0.01
25.80 8.21 5.11 0.00
26.40 8.21 5.11 0.00
27.00 8.21 5.11 0.00
27.60 8.21 5.11 0.00
28.20 8.21 5.11 0.00
28.80 8.21 5.11 0.00
29.40 8.21 5.11 0.00
30.00 8.21 5.11 0.00
30.60 8.21 5.11 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 8.21 5.11 0.00
31.80 8.21 5.11 0.00
32.40 8.21 5.11 0.00
33.00 8.21 5.11 0.00
33.60 8.21 5.11 0.00
34.20 8.21 5.11 0.00
34.80 8.21 5.11 0.00
35.40 8.21 5.11 0.00
36.00 8.21 5.11 0.00
36.60 8.21 5.11 0.00
37.20 8.21 5.11 0.00
37.80 8.21 5.11 0.00
38.40 8.21 5.11 0.00
39.00 8.21 5.11 0.00
39.60 8.21 5.11 0.00
40.20 8.21 5.11 0.00
40.80 8.21 5.11 0.00
41.40 8.21 5.11 0.00
42.00 8.21 5.11 0.00
42.60 8.21 5.11 0.00
43.20 8.21 5.11 0.00
43.80 8.21 5.11 0.00
44.40 8.21 5.11 0.00
45.00 8.21 5.11 0.00
45.60 8.21 5.11 0.00
46.20 8.21 5.11 0.00
46.80 8.21 5.11 0.00
47.40 8.21 5.11 0.00
48.00 8.21 5.11 0.00
•
•
DA2
Post
Pond 2
• Subcat Reach on Link
D /2P
Pond-2-Post
Prepared by WSP SELLS Printed 9/10/2009
• H ydroCAD®9 00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 2
Area Listing (all nodes)
Area CN Description
(acres) (subcatchment-numbers)
8.990 74 >75% Grass cover, Good, HSG C (DA2)
5.850 98 Paved parking, HSG C (DA2)
3.260 98 Roofs, HSG C (DA2)
0.050 98 Unconnected pavement, HSG C (DA2)
18.150 TOTAL AREA
•
0
Pond-2-Post
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 3
Soil Listing (all nodes)
Area Soil Subcatchment
(acres) Goup Numbers
0.000 HSG A
0.000 HSG B
18.150 HSG C DA2
0.000 HSG D
0.000 Other
18.150 TOTAL AREA
•
0
Pond-2-Post
Prepared by WSP SELLS
HydroCAD D 9.00 s/n 04719 © 2009 1
Line# Node In-Invert
Number (feet)
1 2P 524.80
E
Printed 9/10/2009
?ydroCAD Software Solutions LLC Page 4
Pipe Listing (all nodes)
Out-Invert Length Slope n DiamMidth Height
(feet) (feet) (ft/ft) (inches) (inches)
523.00 104.0 0.0173 0.025 36.0 0.0
0
Pond _2_Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 5
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA2: Post Runoff Area=18.150 ac 50.47% Impervious Runoff Depth=1.50"
Tc=5.0 min CN=86 Runoff=49.89 cfs 2.270 of
Pond 2P: Pond 2 Peak Elev=532.59' Storage=3.381 of Inflow=49.89 cfs 2.270 of
Primary=1.84 cfs 1.522 of Secondary=0.00 cfs 0.000 of Outflow=1.84 cfs 1.522 of
Total Runoff Area =18.150 ac Runoff Volume = 2.270 of Average Runoff Depth =1.50"
49.53% Pervious = 8.990 ac 50.47% Impervious = 9.160 ac
C
0
•
Pond _2_Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment DA2: Post
Runoff = 49.89 cfs @ 11.96 hrs, Volume= 2.270 af, Depth= 1.50"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 1 year Rainfall=2.81"
Area (ac) CN Description
5.850 98 Paved parking, HSG C
0.050 98 Unconnected pavement, HSG C
3.260 98 Roofs, HSG C
8.990 74 >75% Grass cover, Good, HSG C
18.150 86 Weighted Average
8.990 49.53% Pervious Area
9.160 50.47% Impervious Area
0.050 0.55% Unconnected
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment DA2: Post
•
Hydrograph
N
w
V
3
0
U.
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
0
Pond-2-Post Type // 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
• HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 7
Hydrograph for Subcatchment DA2: Post

•
Time Precip. Excess Runoff
(hours) ( inches) ( inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.02 0.00 0.00
1.20 0.04 0.00 0.00
1.80 0.06 0.00 0.00
2.40 0.08 0.00 0.00
3.00 0.10 0.00 0.00
3.60 0.12 0.00 0.00
4.20 0.14 0.00 0.00
4.80 0.17 0.00 0.00
5.40 0.20 0.00 0.00
6.00 0.22 0.00 0.00
6.60 0.26 0.00 0.00
7.20 0.29 0.00 0.00
7.80 0.32 0.00 0.00
8.40 0.36 0.00 0.05
9.00 0.41 0.00 0.15
9.60 0.47 0.01 0.25
10.20 0.53 0.02 0.45
10.80 0.62 0.05 0.86
11.40 0.76 0.09 1.93
12.00 1.86 0.75 42.98
12.60 2.09 0.92 3.44
13.20 2.20 1.00 2.32
13.80 2.28 1.07 1.73
14.40 2.34 1.12 1.43
15.00 2.40 1.16 1.27
15.60 2.45 1.20 1.10
16.20 2.49 1.23 0.95
16.80 2.52 1.26 0.89
17.40 2.56 1.29 0.83
18.00 2.59 1.32 0.77
18.60 2.62 1.34 0.71
19.20 2.64 1.36 0.65
19.80 2.67 1.38 0.59
20.40 2.69 1.40 0.55
21.00 2.71 1.42 0.54
21.60 2.73 1.44 0.53
22.20 2.75 1.45 0.51
22.80 2.77 1.47 0.50
23.40 2.79 1.49 0.49
24.00 2.81 1.50 0.48
24.60 2.81 1.50 0.00
25.20 2.81 1.50 0.00
25.80 2.81 1.50 0.00
26.40 2.81 1.50 0.00
27.00 2.81 1.50 0.00
27.60 2.81 1.50 0.00
28.20 2.81 1.50 0.00
28.80 2.81 1.50 0.00
29.40 2.81 1.50 0.00
30.00 2.81 1.50 0.00
30.60 2.81 1.50 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 2.81 1.50 0.00
31.80 2.81 1.50 0.00
32.40 2.81 1.50 0.00
33.00 2.81 1.50 0.00
33.60 2.81 1.50 0.00
34.20 2.81 1.50 0.00
34.80 2.81 1.50 0.00
35.40 2.81 1.50 0.00
36.00 2.81 1.50 0.00
36.60 2.81 1.50 0.00
37.20 2.81 1.50 0.00
37.80 2.81 1.50 0.00
38.40 2.81 1.50 0.00
39.00 2.81 1.50 0.00
39.60 2.81 1.50 0.00
40.20 2.81 1.50 0.00
40.80 2.81 1.50 0.00
41.40 2.81 1.50 0.00
42.00 2.81 1.50 0.00
42.60 2.81 1.50 0.00
43.20 2.81 1.50 0.00
43.80 2.81 1.50 0.00
44.40 2.81 1.50 0.00
45.00 2.81 1.50 0.00
45.60 2.81 1.50 0.00
46.20 2.81 1.50 0.00
46.80 2.81 1.50 0.00
47.40 2.81 1.50 0.00
48.00 2.81 1.50 0.00
Pond-2-Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
• HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 8
Summary for Pond 2P: Pond 2
Inflow Area = 18.150 ac, 50.47% Impervious, Inflow Depth = 1.50" for Eden 1 year event
Inflow = 49.89 cfs @ 11.96 hrs, Volume= 2.270 cif
Outflow = 1.84 cfs @ 13.67 hrs, Volume= 1.522 af, Atten= 96%, Lag= 102.6 min
Primary = 1.84 cfs @ 13.67 hrs, Volume= 1.522 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Starting Elev= 530.50' Surf.Area= 0.572 ac Storage= 1.993 of
Peak Elev= 532.59' @ 13.67 hrs Surf.Area= 0.723 ac Storage= 3.381 of (1.387 of above start)
Plug-Flow detention time= (not calculated: initial storage excedes outflow)
Center-of-Mass det. time= 493.6 min ( 1,317.8 - 824.2 )
Volume Invert Avail.Storage Storage Description
#1 525.00' 7.253 of Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (acres) (acre-feet) (acre-feet)
525.00 0.101 0.000 0.000
526.00 0.247 0.174 0.174
527.00 0.294 0.271 0.445
528.00 0.417 0.356 0.800
529.00
40 0.461 0.439 1.239
530.00 0.507 0.484 1.724
530.50 0.572 0.270 1.993
531.00 0.640 0.303 2.296
532.00 0.693 0.666 2.963
533.00 0.743 0.718 3.681
534.00 0.804 0.774 4.455
535.00 0.914 0.859 5.314
536.00 0.969 0.942 6.255
537.00 1.026 0.998 7.253
Device Routing Invert Outlet Devices
#1 Primary 524.80' 36.0" Round Culvert
L= 104.0' CMP, square edge headwall, Ke= 0.500
Outlet Invert= 523.00' S=0.0173'/' Cc= 0.900
n= 0.025 Corrugated metal
#2 Device 1 530.50' 2.5" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#3 Device 1 532.10' 10.0" Vert. Orifice/Grate X 2.00 C=0.600
#4 Device 1 535.50' 60.0" x 60.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 536.00' 12.0' long x 19.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63

Pond-2-Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 9
Primary OutFlow Max=1.83 cfs @ 13.67 hrs HW=532.59' (Free Discharge)
L1=Culvert (Passes 1.83 cfs of 70.29 cfs potential flow)
2=Orifice/Grate (Orifice Controls 0.24 cfs @ 6.96 fps)
3=Orifice/Grate (Orifice Controls 1.59 cfs @ 2.38 fps)
4=Orifice/Grate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=530.50' (Free Discharge)
L5=Broad-Crested Rectangular Weir (Controls 0.00 cfs)
Pond 2P: Pond 2
•
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
0
Type 1124 -hr Eden
1 year Rainfall=2.81 "
Pond _2_Post
Printed 9/10/2009
Prepared by WSP SELLS
Page 10
HydroCADO 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC
Pond 2P: Pond 2
Stage -Discharge
0 Total
■ Primary
537
-
■ Secondary
Bioad-on— ed Rectangular
eir`
536
535
534
,.
533
ani 532
MUMM
5
0 31
._
530
_ _ _ _ -
------
w
529
528
527
526
525 ,, ,.. ,�..
0 10 20 30 40
'..: ',
120
50 60 70 80 90 100 110
Discharge (cfs)
Pond 2P: Pond 2
Stage -Area -Storage
Surface/Horizontal/Wetted Area (acres)
1
❑Surface
0
® Storage
537---
- - -
T-----------
-
536
535
534
533
w 532
0 531--
---- - -- -- ----
-- - -- - --- -
-
m 530
LU
529
528
- -
---------- '
-- -
527
- -
_ ---------_,-
526
525
0 1 2
3 4 5 6?
Storage (acre-feet)

Pond _2_Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 11
Hydrograph for Pond 2P: Pond 2
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (acre-feet) (feet) (cfs) (cfs) (cfs)
0.00 0.00 1.993 530.50 0.00 0.00 0.00
1.50 0.00 1.993 530.50 0.00 0.00 0.00
3.00 0.00 1.993 530.50 0.00 0.00 0.00
4.50 0.00 1.993 530.50 0.00 0.00 0.00
6.00 0.00 1.993 530.50 0.00 0.00 0.00
7.50 0.00 1.993 530.50 0.00 0.00 0.00
9.00 0.15 1.999 530.51 0.00 0.00 0.00
10.50 0.61 2.037 530.58 0.03 0.03 0.00
12.00 42.98 2.911 531.92 0.20 0.20 0.00
13.50 1.99 3.380 532.59 1.83 1.83 0.00
15.00 1.27 3.352 532.55 1.61 1.61 0.00
16.50 0.92 3.304 532.48 1.28 1.28 0.00
18.00 0.77 3.267 532.43 1.03 1.03 0.00
19.50 0.62 3.236 532.39 0.86 0.86 0.00
21.00 0.54 3.209 532.35 0.71 0.71 0.00
22.50 0.51 3.192 532.33 0.62 0.62 0.00
24.00 0.48 3.181 532.31 0.57 0.57 0.00
25.50 0.00 3.126 532.23 0.37 0.37 0.00
27.00 0.00 3.087 532.18 0.27 0.27 0.00
28.50 0.00 3.055 532.13 0.24 0.24 0.00
30.00 0.00 3.028 532.09 0.21 0.21 0.00
31.50 0.00 3.003 532.06 0.20 0.20 0.00
33.00 0.00 2.977 532.02 0.20 0.20 0.00
34.50 0.00 2.952 531.99 0.20 0.20 0.00
36.00 0.00 2.928 531.95 0.20 0.20 0.00
37.50 0.00 2.903 531.91 0.20 0.20 0.00
39.00 0.00 2.879 531.88 0.19 0.19 0.00
40.50 0.00 2.856 531.84 0.19 0.19 0.00
42.00 0.00 2.832 531.81 0.19 0.19 0.00
43.50 0.00 2.809 531.78 0.19 0.19 0.00
45.00 0.00 2.786 531.74 0.18 0.18 0.00
46.50 0.00 2.764 531.71 0.18 0.18 0.00
48.00 0.00 2.742 531.68 0.18 0.18 0.00
0
Pond _2_Post Type 1124-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
10 HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 12
Stage-Discharge for Pond 2P: Pond 2
•
•
Elevation Discharge Primary Secondary
(feet) (cfs) (cfs) (cfs)
525.00 0.00 0.00 0.00
525.15 0.00 0.00 0.00
525.30 0.00 0.00 0.00
525.45 0.00 0.00 0.00
525.60 0.00 0.00 0.00
525.75 0.00 0.00 0.00
525.90 0.00 0.00 0.00
526.05 0.00 0.00 0.00
526.20 0.00 0.00 0.00
526.35 0.00 0.00 0.00
526.50 0.00 0.00 0.00
526.65 0.00 0.00 0.00
526.80 0.00 0.00 0.00
526.95 0.00 0.00 0.00
527.10 0.00 0.00 0.00
527.25 0.00 0.00 0.00
527.40 0.00 0.00 0.00
527.55 0.00 0.00 0.00
527.70 0.00 0.00 0.00
527.85 0.00 0.00 0.00
528.00 0.00 0.00 0.00
528.15 0.00 0.00 0.00
528.30 0.00 0.00 0.00
528.45 0.00 0.00 0.00
528.60 0.00 0.00 0.00
528.75 0.00 0.00 0.00
528.90 0.00 0.00 0.00
529.05 0.00 0.00 0.00
529.20 0.00 0.00 0.00
529.35 0.00 0.00 0.00
529.50 0.00 0.00 0.00
529.65 0.00 0.00 0.00
529.80 0.00 0.00 0.00
529.95 0.00 0.00 0.00
530.10 0.00 0.00 0.00
530.25 0.00 0.00 0.00
530.40 0.00 0.00 0.00
530.55 0.02 0.02 0.00
530.70 0.07 0.07 0.00
530.85 0.10 0.10 0.00
531.00 0.12 0.12 0.00
531.15 0.13 0.13 0.00
531.30 0.15 0.15 0.00
531.45 0.16 0.16 0.00
531.60 0.17 0.17 0.00
531.75 0.18 0.18 0.00
531.90 0.19 0.19 0.00
532.05 0.20 0.20 0.00
532.20 0.29 0.29 0.00
532.35 0.69 0.69 0.00
532.50 1.35 1.35 0.00
532.65 2.17 2.17 0.00
Elevation Discharge Primary Secondary
(feet) (cfs) (cfs) (cfs)
532.80 3.04 3.04 0.00
532.95 3.71 3.71 0.00
533.10 4.28 4.28 0.00
533.25 4.77 4.77 0.00
533.40 5.22 5.22 0.00
533.55 5.63 5.63 0.00
533.70 6.01 6.01 0.00
533.85 6.37 6.37 0.00
534.00 6.70 6.70 0.00
534.15 7.03 7.03 0.00
534.30 7.33 7.33 0.00
534.45 7.63 7.63 0.00
534.60 7.91 7.91 0.00
534.75 8.19 8.19 0.00
534.90 8.45 8.45 0.00
535.05 8.71 8.71 0.00
535.20 8.96 8.96 0.00
535.35 9.20 9.20 0.00
535.50 9.44 9.44 0.00
535.65 13.47 13.47 0.00
535.80 20.64 20.64 0.00
535.95 29.86 29.86 0.00
536.10 41.74 40.73 1.02
536.25 57.05 53.02 4.03
536.40 74.79 66.59 8.20
536.55 94.53 81.32 13.22
536.70 108.33 89.56 18.76
536.85 114.99 90.19 24.80
537.00 122.37 90.81 31.56
Pond-2-Post Type 11 24-hr Eden 1 year Rainfall=2.81 "
Prepared by WSP SELLS Printed 9/10/2009
H ydroCAD®9 00 s/n 04719 02009 HvdroCAD Software Solutions LLC Page 13
Stage-Area-Storage for Pond 2P: Pond 2
•

Elevation Surface Storage
(feet) (acres) (acre-feet)
525.00 0.101 0.000
525.15 0.123 0.017
525.30 0.145 0.037
525.45 0.167 0.060
525.60 0.189 0.087
525.75 0.210 0.117
525.90 0.232 0.150
526.05 0.249 0.186
526.20 0.256 0.224
526.35 0.263 0.263
526.50 0.271 0.303
526.65 0.278 0.344
526.80 0.285 0.387
526.95 0.292 0.430
527.10 0.307 0.475
527.25 0.325 0.522
527.40 0.343 0.572
527.55 0.362 0.625
527.70 0.380 0.681
527.85 0.399 0.739
528.00 0.417 0.800
528.15 0.424 0.863
528.30 0.430 0.927
528.45 0.437 0.992
528.60 0.444 1.058
528.75 0.450 1.125
528.90 0.457 1.194
529.05 0.464 1.263
529.20 0.470 1.333
529.35 0.477 1.404
529.50 0.484 1.476
529.65 0.491 1.549
529.80 0.498 1.623
529.95 0.505 1.698
530.10 0.520 1.775
530.25 0.539 1.854
530.40 0.559 1.937
530.55 0.579 2.022
530.70 0.599 2.110
530.85 0.620 2.202
531.00 0.640 2.296
531.15 0.648 2.393
531.30 0.656 2.491
531.45 0.664 2.590
531.60 0.672 2.690
531.75 0.680 2.791
531.90 0.688 2.894
532.05 0.695 2.998
532.20 0.703 3.102
532.35 0.711 3.208
532.50 0.718 3.316
532.65 0.726 3.424
Elevation Surface Storage
(feet) (acres) (acre-feet)
532.80 0.733 3.533
532.95 0.741 3.644
533.10 0.749 3.756
533.25 0.759 3.869
533.40 0.768 3.983
533.55 0.777 4.099
533.70 0.786 4.216
533.85 0.795 4.335
534.00 0.804 4.455
534.15 0.821 4.576
534.30 0.837 4.701
534.45 0.854 4.828
534.60 0.870 4.957
534.75 0.887 5.089
534.90 0.903 5.223
535.05 0.917 5.359
535.20 0.925 5.498
535.35 0.933 5.637
535.50 0.942 5.778
535.65 0.950 5.920
535.80 0.958 6.063
535.95 0.967 6.207
536.10 0.975 6.353
536.25 0.984 6.500
536.40 0.992 6.648
536.55 1.001 6.797
536.70 1.009 6.948
536.85 1.018 7.100
537.00 1.026 7.253
•
Pond-2-Post Type 1124-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 14
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA2: Post Runoff Area=18.150 ac 50.47% Impervious Runoff Depth=3.56"
Tc=5.0 min CN=86 Runoff=113.73 cfs 5.385 of
Pond 2P: Pond 2 Peak Elev=534.69' Storage=5.032 of Inflow=113.73 cfs 5.385 of
Primary=8.07 cfs 4.615 of Secondary=0.00 cfs 0.000 of Outflow=8.07 cfs 4.615 of
Total Runoff Area =18.150 ac Runoff Volume = 5.385 of Average Runoff Depth = 3.56"
49.53% Pervious = 8.990 ac 50.47% Impervious = 9.160 ac
•
0
Pond-2-Post Type 11 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
H ydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 15
Summary for Subcatchment DA2: Post
Runoff = 113.73 cfs @ 11.96 hrs, Volume= 5.385 af, Depth= 3.56"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 10 year Rainfall=5.10"
Area ac CN Description
5.850 98 Paved parking, HSG C
0.050 98 Unconnected pavement, HSG C
3.260 98 Roofs, HSG C
8.990 74 >75% Grass cover, Good, HSG C
18.150 86 Weighted Average
8.990 49.53% Pervious Area
9.160 50.47% Impervious Area
0.050 0.55% Unconnected
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment DA2: Post
is
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
•
Ll
Pond _2_Post Type 1124-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 16
Hydrograph for Subcatchment DA2: Post
•
•
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.03 0.00 0.00
1.20 0.06 0.00 0.00
1.80 0.10 0.00 0.00
2.40 0.14 0.00 0.00
3.00 0.18 0.00 0.00
3.60 0.22 0.00 0.00
4.20 0.26 0.00 0.00
4.80 0.31 0.00 0.00
5.40 0.35 0.00 0.04
6.00 0.41 0.00 0.14
6.60 0.46 0.01 0.26
7.20 0.53 0.02 0.38
7.80 0.59 0.04 0.51
8.40 0.66 0.06 0.72
9.00 0.75 0.09 1.06
9.60 0.85 0.13 1.27
10.20 0.97 0.18 1.91
10.80 1.13 0.27 3.08
11.40 1.38 0.42 5.97
12.00 3.38 1.99 96.05
12.60 3.79 2.36 7.29
13.20 4.00 2.54 4.86
13.80 4.14 2.68 3.61
14.40 4.25 2.78 2.96
15.00 4.35 2.87 2.61
15.60 4.44 2.95 2.26
16.20 4.51 3.01 1.95
16.80 4.58 3.07 1.83
17.40 4.64 3.13 1.70
18.00 4.70 3.19 1.57
18.60 4.75 3.23 1.45
19.20 4.80 3.28 1.32
19.80 4.84 3.32 1.19
20.40 4.88 3.36 1.12
21.00 4.92 3.39 1.09
21.60 4.96 3.43 1.06
22.20 4.99 3.46 1.04
22.80 5.03 3.50 1.01
23.40 5.07 3.53 0.99
24.00 5.10 3.56 0.96
24.60 5.10 3.56 0.00
25.20 5.10 3.56 0.00
25.80 5.10 3.56 0.00
26.40 5.10 3.56 0.00
27.00 5.10 3.56 0.00
27.60 5.10 3.56 0.00
28.20 5.10 3.56 0.00
28.80 5.10 3.56 0.00
29.40 5.10 3.56 0.00
30.00 5.10 3.56 0.00
30.60 5.10 3.56 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 5.10 3.56 0.00
31.80 5.10 3.56 0.00
32.40 5.10 3.56 0.00
33.00 5.10 3.56 0.00
33.60 5.10 3.56 0.00
34.20 5.10 3.56 0.00
34.80 5.10 3.56 0.00
35.40 5.10 3.56 0.00
36.00 5.10 3.56 0.00
36.60 5.10 3.56 0.00
37.20 5.10 3.56 0.00
37.80 5.10 3.56 0.00
38.40 5.10 3.56 0.00
39.00 5.10 3.56 0.00
39.60 5.10 3.56 0.00
40.20 5.10 3.56 0.00
40.80 5.10 3.56 0.00
41.40 5.10 3.56 0.00
42.00 5.10 3.56 0.00
42.60 5.10 3.56 0.00
43.20 5.10 3.56 0.00
43.80 5.10 3.56 0.00
44.40 5.10 3.56 0.00
45.00 5.10 3.56 0.00
45.60 5.10 3.56 0.00
46.20 5.10 3.56 0.00
46.80 5.10 3.56 0.00
47.40 5.10 3.56 0.00
48.00 5.10 3.56 0.00
Pond-2-Post Type// 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 17
Summary for Pond 2P: Pond 2
Inflow Area = 18.150 ac, 50.47% Impervious, Inflow Depth = 3.56" for Eden 10 year event
Inflow = 113.73 cfs @ 11.96 hrs, Volume= 5.385 of
Outflow = 8.07 cfs @ 12.54 hrs, Volume= 4.615 af, Atten= 93%, Lag= 34.7 min
Primary = 8.07 cfs @ 12.54 hrs, Volume= 4.615 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Starting Elev= 530.50' Surf.Area= 0.572 ac Storage= 1.993 of
Peak Elev= 534.69'@ 12.54 hrs Surf.Area= 0.880 ac Storage= 5.032 of (3.039 of above start)
Plug-Flow detention time= 581.9 min calculated for 2.622 of (49% of inflow)
Center-of-Mass det. time= 267.0 min ( 1,066.6 - 799.7 )
Volume Invert Avail Storage Storage Description
#1 525.00' 7.253 of Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) (acres) (acre-feet) (acre-feet)
525.00 0.101 0.000 0.000
526.00 0.247 0.174 0.174
527.00 0.294 0.271 0.445
528.00 0.417 0.356 0.800
529.00 0.461 0.439 1.239
530.00 0.507 0.484 1.724
530.50 0.572 0.270 1.993
531.00 0.640 0.303 2.296
532.00 0.693 0.666 2.963
533.00 0.743 0.718 3.681
534.00 0.804 0.774 4.455
535.00 0.914 0.859 5.314
536.00 0.969 0.942 6.255
537.00 1.026 0.998 7.253
Device Routing Invert Outlet Devices
#1 Primary 524.80' 36.0" Round Culvert
L= 104.0' CMP, square edge headwall, Ke= 0.500
Outlet Invert= 523.00' S=0.0173'/' Cc= 0.900
n= 0.025 Corrugated metal
#2 Device 1 530.50' 2.5" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#3 Device 1 532.10' 10.0" Vert. Orifice/Grate X 2.00 C=0.600
#4 Device 1 535.50' 60.0" x 60.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 536.00' 12.0' long x 19.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
0
Pond _2_Post Type 1124-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 18
Primary OutFlow Max=8.07 cfs @ 12.54 hrs HW=534.69' (Free Discharge)
L1 =Culvert (Passes 8.07 cfs of 80.70 cfs potential flow)
2=0rifice/Grate (Orifice Controls 0.34 cfs @ 9.85 fps)
3=Orifice/Grate (Orifice Controls 7.74 cfs @ 7.09 fps)
4=Orifice/Grate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=530.50' (Free Discharge)
L5=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Pond 2P: Pond 2
Hydrograph
,
,
- - , - - - - - - - LInflow
113.73 cfs ow
8;150 ac ry
Area=1
Inflowndary
120 Peak Elev..-534.69
110
I
torage=5,03.2 of
100-
90-
80'
---------------------
70-
--------------
c 60 _ __
I
I
LL 5O
40
30
8.07 cfs
ZO 8.07 c
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
0
Pond-2-Post Type 11 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
40 HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 19
Pond 2P: Pond 2
Stage-Discharge
Total
¦ Primary
® Secondary•

•
m 532
V-.
0 531
iu 53C
w
0 10 20 30 40
50 60 70
Discharge (cfs)
80 90 100 110 120
Pond 2P: Pond 2
Stage-Area-Storage
S u rface/H o rizonta Metted Area (acres)
0 1
----------------- ------------------r---------- -- -:
537 --- - -- -
536
535 '
,
- - - - - - - - - - - - - - - - - - -----------,-,-
- -- -
534
533-
532-
0 531 - - ------ - - - - - - - - - - - - - -- ---. ---- - - - - - -
-
Startingllwglion
y 530
w
529 '
''-
------- ------------------
- - -
528
------------------------------
--
527 - - - - - - - ; - - - - - - - - - - - - - - - - - - - - - -
?
526
525
0 1 2 3 4 5 6 7
Storage (acre-feet)
10 Surface
® Storage
Pond-2-Post Type // 24-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
H ydroCAD®9 00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 20
Hydrograph for Pond 2P: Pond 2
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (acre-feet) (feet) (cfs) (cfs) (cfs)
00
0 0.00 1.993 530.50 0.00 0.00 0.00
.
50
1 0.00 1.993 530.50 0.00 0.00 0.00
.
00
3 0.00 1.993 530.50 0.00 0.00 0.00
.
4
50 0.00 1.993 530.50 0.00 0.00 0.00
.
00
6 0.14 1.998 530.51 0.00 0.00 0.00
.
50
7 0.44 2.033 530.57 0.03 0.03 0.00
.
00
9 1.06 2.111 530.70 0.07 0.07 0.00
.
50
10 2.38 2.288 530.99 0.11 0.11 0.00
.
12
00 96.05 4.469 534.02 6.74 6.74 0.00
.
50
13 4.16 4.848 534.47 7.68 7.68 0.00
.
00
15 2.61 4.363 533.89 6.45 6.45 0.00
.
50
16 1.89 3.924 533.32 4.99 4.99 0.00
.
00
18 1.57 3.611 532.91 3.54 3.54 0.00
.
50
19 1.25 3.433 532.66 2.25 2.25 0.00
.
00
21 1.09 3.345 532.54 1.56 1.56 0.00
.
50
22 1.03 3.302 532.48 1.27 1.27 0.00
.
24
00 0.96 3.279 532.45 1.11 1.11 0.00
.
50
25 0.00 3.184 532.32 0.58 0.58 0.00
.
00
27 0.00 3.126 532.23 0.38 0.38 0.00
.
50
28 0.00 3.087 532.18 0.28 0.28 0.00
.
30.00 0.00 3.055 532.13 0.24 0.24 0.00
31
50 0.00 3.028 532.09 0.21 0.21 0.00
.
00
33 0.00 3.003 532.06 0.20 0.20 0.00
.
34
50 0.00 2.978 532.02 0.20 0.20 0.00
.
00
36 0.00 2.953 531.99 0.20 0.20 0.00
.
50
37 0.00 2.928 531.95 0.20 0.20 0.00
.
00
39 0.00 2.904 531.91 0.20 0.20 0.00
.
50
40 0.00 2.880 531.88 0.19 0.19 0.00
.
42
00 0.00 2.856 531.84 0.19 0.19 0.00
.
50
43 0.00 2.832 531.81 0.19 0.19 0.00
.
00
45 0.00 2.809 531.78 0.19 0.19 0.00
.
50
46 0.00 2.786 531.74 0.18 0.18 0.00
.
48.00 0.00 2.764 531.71 0.18 0.18 0.00
0
•
•
•
Pond _2_Post Type 1124-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD® 9.00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 21
Stage-Discharge for Pond 2P: Pond 2
Elevation Discharge Primary Secondary
(feet) (cfs) (cfs) (cfs)
525.00 0.00 0.00 0.00
525.15 0.00 0.00 0.00
525.30 0.00 0.00 0.00
525.45 0.00 0.00 0.00
525.60 0.00 0.00 0.00
525.75 0.00 0.00 0.00
525.90 0.00 0.00 0.00
526.05 0.00 0.00 0.00
526.20 0.00 0.00 0.00
526.35 0.00 0.00 0.00
526.50 0.00 0.00 0.00
526.65 0.00 0.00 0.00
526.80 0.00 0.00 0.00
526.95 0.00 0.00 0.00
527.10 0.00 0.00 0.00
527.25 0.00 0.00 0.00
527.40 0.00 0.00 0.00
527.55 0.00 0.00 0.00
527.70 0.00 0.00 0.00
527.85 0.00 0.00 0.00
528.00 0.00 0.00 0.00
528.15 0.00 0.00 0.00
528.30 0.00 0.00 0.00
528.45 0.00 0.00 0.00
528.60 0.00 0.00 0.00
528.75 0.00 0.00 0.00
528.90 0.00 0.00 0.00
529.05 0.00 0.00 0.00
529.20 0.00 0.00 0.00
529.35 0.00 0.00 0.00
529.50 0.00 0.00 0.00
529.65 0.00 0.00 0.00
529.80 0.00 0.00 0.00
529.95 0.00 0.00 0.00
530.10 0.00 0.00 0.00
530.25 0.00 0.00 0.00
530.40 0.00 0.00 0.00
530.55 0.02 0.02 0.00
530.70 0.07 0.07 0.00
530.85 0.10 0.10 0.00
531.00 0.12 0.12 0.00
531.15 0.13 0.13 0.00
531.30 0.15 0.15 0.00
531.45 0.16 0.16 0.00
531.60 0.17 0.17 0.00
531.75 0.18 0.18 0.00
531.90 0.19 0.19 0.00
532.05 0.20 0.20 0.00
532.20 0.29 0.29 0.00
532.35 0.69 0.69 0.00
532.50 1.35 1.35 0.00
532.65 2.17 2.17 0.00
Elevation Discharge Primary Secondary
(feet) (cfs) (cfs) (cfs)
532.80 3.04 3.04 0.00
532.95 3.71 3.71 0.00
533.10 4.28 4.28 0.00
533.25 4.77 4.77 0.00
533.40 5.22 5.22 0.00
533.55 5.63 5.63 0.00
533.70 6.01 6.01 0.00
533.85 6.37 6.37 0.00
534.00 6.70 6.70 0.00
534.15 7.03 7.03 0.00
534.30 7.33 7.33 0.00
534.45 7.63 7.63 0.00
534.60 7.91 7.91 0.00
534.75 8.19 8.19 0.00
534.90 8.45 8.45 0.00
535.05 8.71 8.71 0.00
535.20 8.96 8.96 0.00
535.35 9.20 9.20 0.00
535.50 9.44 9.44 0.00
535.65 13.47 13.47 0.00
535.80 20.64 20.64 0.00
535.95 29.86 29.86 0.00
536.10 41.74 40.73 1.02
536.25 57.05 53.02 4.03
536.40 74.79 66.59 8.20
536.55 94.53 81.32 13.22
536.70 108.33 89.56 18.76
536.85 114.99 90.19 24.80
537.00 122.37 90.81 31.56

Pond-2-Post Type 1124-hr Eden 10 year Rainfall=5.10"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 22
Stage-Area-Storage for Pond 2P: Pond 2
C7
•
Elevation Surface Storage
_(feet) (acres) (acre-feet)
525.00 0.101 0.000
525.15 0.123 0.017
525.30 0.145 0.037
525.45 0.167 0.060
525.60 0.189 0.087
525.75 0.210 0.117
525.90 0.232 0.150
526.05 0.249 0.186
526.20 0.256 0.224
526.35 0.263 0.263
526.50 0.271 0.303
526.65 0.278 0.344
526.80 0.285 0.387
526.95 0.292 0.430
527.10 0.307 0.475
527.25 0.325 0.522
527.40 0.343 0.572
527.55 0.362 0.625
527.70 0.380 0.681
527.85 0.399 0.739
528.00 0.417 0.800
528.15 0.424 0.863
528.30 0.430 0.927
528.45 0.437 0.992
528.60 0.444 1.058
528.75 0.450 1.125
528.90 0.457 1.194
529.05 0.464 1.263
529.20 0.470 1.333
529.35 0.477 1.404
529.50 0.484 1.476
529.65 0.491 1.549
529.80 0.498 1.623
529.95 0.505 1.698
530.10 0.520 1.775
530.25 0.539 1.854
530.40 0.559 1.937
530.55 0.579 2.022
530.70 0.599 2.110
530.85 0.620 2.202
531.00 0.640 2.296
531.15 0.648 2.393
531.30 0.656 2.491
531.45 0.664 2.590
531.60 0.672 2.690
531.75 0.680 2.791
531.90 0.688 2.894
532.05 0.695 2.998
532.20 0.703 3.102
532.35 0.711 3.208
532.50 0.718 3.316
532.65 0.726 3.424
Elevation Surface Storage
(feet) (acres) (acre-feet)
532.80 0.733 3.533
532.95 0.741 3.644
533.10 0.749 3.756
533.25 0.759 3.869
533.40 0.768 3.983
533.55 0.777 4.099
533.70 0.786 4.216
533.85 0.795 4.335
534.00 0.804 4.455
534.15 0.821 4.576
534.30 0.837 4.701
534.45 0.854 4.828
534.60 0.870 4.957
534.75 0.887 5.089
534.90 0.903 5.223
535.05 0.917 5.359
535.20 0.925 5.498
535.35 0.933 5.637
535.50 0.942 5.778
535.65 0.950 5.920
535.80 0.958 6.063
535.95 0-967 6.207
536.10 0.975 6.353
536.25 0.984 6.500
536.40 0.992 6.648
536.55 1.001 6.797
536.70 1.009 6.948
536.85 1.018 7.100
537.00 1.026 7.253
Pond _2_Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
is HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 23
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA2: Post Runoff Area=18.150 ac 50.47% Impervious Runoff Depth=4.62"
Tc=5.0 min CN=86 Runoff=145.16 cfs 6.986 of
Pond 2P: Pond 2 Peak Elev=535.65' Storage=5.921 of Inflow=145.16 cfs 6.986 of
Primary=13.72 cfs 6.209 of Secondary=0.00 cfs 0.000 of Outflow=13.72 cfs 6.209 of
Total Runoff Area =18.150 ac Runoff Volume = 6.986 of Average Runoff Depth = 4.62"
49.53% Pervious = 8.990 ac 50.47% Impervious = 9.160 ac

Pond-2-Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
H ydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 24
Summary for Subcatchment DA2: Post
Runoff = 145.16 cfs @ 11.96 hrs, Volume= 6.986 af, Depth= 4.62"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 25 year Rainfall=6.22"
Area ac CN Description
5.850 98 Paved parking, HSG C
0.050 98 Unconnected pavement, HSG C
3.260 98 Roofs, HSG C
8.990 74 >75% Grass cover, Good, HSG C
18.150 86 Weighted Average
8.990 49.53% Pervious Area
9.160 50.47% Impervious Area
0.050 0.55% Unconnected
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment DA2: Post
Hdroraph -.--
160 _ ®Runoff
145.16 cfs _- '-- -- 24-h 150 ' -`--
- --
Type_ tl r Rden
140-
25 year .
1307:
120 _ - - - - - - - - - - - - - - - - Rainfal-I ? .? 2't
110 _
loo Runoff .Area 18.150 ac
so - -Runoff'Volurne=6:989-af
3 80
- Runoff Depth=4.62"
o ,
M 70 _ , -
r _ Tc=6.0 inin
60
--- - ; -- - CN=8
50 - - -- - -- - -- - - ---- -
40 -
-
30
20
---- --------------
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)

Pond-2-Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
40 HydroCAD® 9.00 s/n 04719 02009 HydroCAD Software Solutions LLC Page 25
Hydrograph for Subcatchment DA2: Post
•

Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.04 0.00 0.00
1.20 0.08 0.00 0.00
1.80 0.12 0.00 0.00
2.40 0.17 0.00 0.00
3.00 0.21 0.00 0.00
3.60 0.26 0.00 0.00
4.20 0.32 0.00 0.00
4.80 0.37 0.00 0.08
5.40 0.43 0.01 0.21
6.00 0.50 0.02 0.35
6.60 0.57 0.03 0.51
7.20 0.64 0.05 0.67
7.80 0.72 0.08 0.84
8.40 0.81 0.11 1.14
9.00 0.91 0.16 1.61
9.60 1.03 0.21 1.88
10.20 1.18 0.29 2.75
10.80 1.38 0.41 4.32
11.40 1.69 0.62 8.13
12.00 4.12 2.66 122.04
12.60 4.62 3.12 9.16
13.20 4.87 3.35 6.09
13.80 5.05 3.52 4.52
14.40 5.19 3.64 3.70
15.00 5.31 3.76 3.26
15.60 5.41 3.85 2.82
16.20 5.50 3.94 2.43
16.80 5.58 4.01 2.28
17.40 5.66 4.09 2.12
18.00 5.73 4.15 1.96
18.60 5.79 4.21 1.80
19.20 5.85 4.27 1.64
19.80 5.90 4.32 1.48
20.40 5.95 4.37 1.39
21.00 6.00 4.41 1.36
21.60 6.05 4.45 1.32
22.20 6.09 4.50 1.29
22.80 6.14 4.54 1.26
23.40 6.18 4.58 1.23
24.00 6.22 4.62 1.20
24.60 6.22 4.62 0.00
25.20 6.22 4.62 0.00
25.80 6.22 4.62 0.00
26.40 6.22 4.62 0.00
27.00 6.22 4.62 0.00
27.60 6.22 4.62 0.00
28.20 6.22 4.62 0.00
28.80 6.22 4.62 0.00
29.40 6.22 4.62 0.00
30.00 6.22 4.62 0.00
30.60 6.22 4.62 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 6.22 4.62 0.00
31.80 6.22 4.62 0.00
32.40 6.22 4.62 0.00
33.00 6.22 4.62 0.00
33.60 6.22 4.62 0.00
34.20 6.22 4.62 0.00
34.80 6.22 4.62 0.00
35.40 6.22 4.62 0.00
36.00 6.22 4.62 0.00
36.60 6.22 4.62 0.00
37.20 6.22 4.62 0.00
37.80 6.22 4.62 0.00
38.40 6.22 4.62 0.00
39.00 6.22 4.62 0.00
39.60 6.22 4.62 0.00
40.20 6.22 4.62 0.00
40.80 6.22 4.62 0.00
41.40 6.22 4.62 0.00
42.00 6.22 4.62 0.00
42.60 6.22 4.62 0.00
43.20 6.22 4.62 0.00
43.80 6.22 4.62 0.00
44.40 6.22 4.62 0.00
45.00 6.22 4.62 0.00
45.60 6.22 4.62 0.00
46.20 6.22 4.62 0.00
46.80 6.22 4.62 0.00
47.40 6.22 4.62 0.00
48.00 6.22 4.62 0.00
Pond _2_Post Type// 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD®9 00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 26
Summary for Pond 2P: Pond 2
Inflow Area = 18.150 ac, 50.47% Impervious, Inflow Depth = 4.62" for Eden 25 year event
Inflow = 145.16 cfs @ 11.96 hrs, Volume= 6.986 of
Outflow = 13.72 cfs @ 12.38 hrs, Volume= 6.209 af, Atten= 91 %, Lag= 25.6 min
Primary = 13.72 cfs @ 12.38 hrs, Volume= 6.209 of
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Starting Elev= 530.50' Surf.Area= 0.572 ac Storage= 1.993 of
Peak Elev= 535.65'@ 12.38 hrs Surf.Area= 0.950 ac Storage= 5.921 of (3.928 of above start)
Plug-Flow detention time= 488.4 min calculated for 4.216 of (60% of inflow)
Center-of-Mass det. time= 253.4 min ( 1,045.7 - 792.3 )
Volume Invert Avail Storage Storage Description
#1 525.00' 7.253 of Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) ( acres) (acre-feet) (acre-feet)
525.00 0.101 0.000 0.000
526.00 0.247 0.174 0.174
527.00 0.294 0.271 0.445
• 528.00 0.417 0.356 0.800
529.00 0.461 0.439 1.239
530.00 0.507 0.484 1.724
530.50 0.572 0.270 1.993
531.00 0.640 0.303 2.296
532.00 0.693 0.666 2.963
533.00 0.743 0.718 3.681
534.00 0.804 0.774 4.455
535.00 0.914 0.859 5.314
536.00 0.969 0.942 6.255
537.00 1.026 0.998 7.253
Device Routing Invert Outlet Devices
#1 Primary 524.80' 36.0" Round Culvert
L= 104.0' CMP, square edge headwall, Ke= 0.500
Outlet Invert= 523.00' S= 0.0173T Cc= 0.900
n= 0.025 Corrugated metal
#2 Device 1 530.50' 2.5" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#3 Device 1 532.10' 10.0" Vert. Orifice/Grate X 2.00 C=0.600
#4 Device 1 535.50' 60.0" x 60.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 536.00' 12.0' long x 19.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
0
Pond _2_Post Type II 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
H ydroCAD®9 00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 27
Primary OutFlow Max=13.53 cfs @ 12.38 hrs HW=535.65' (Free Discharge)
t-1 =Culvert (Passes 13.53 cfs of 85.06 cfs potential flow)
2=Orifice/Grate (Orifice Controls 0.37 cfs @ 10.93 fps)
3=Orifice/Grate (Orifice Controls 9.30 cfs @ 8.53 fps)
=Orifice/Grate (Weir Controls 3.86 cfs @ 1.27 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=530.50' (Free Discharge)
t-5=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
¦ Inflow
Outflow
® Primary
¦ Secondary
C7
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)

Pond _2_Post Type I/ 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 28
Pond 2P: Pond 2
Stage-Discharge
am
°'
c
0
m
w
0 10 20 30 40 50 60 70 80 90 100 110 120
• Discharge (cfs)
Pond 2P: Pond 2
Stage-Area-Storage
Surface/Horizontal/Wetted Area (acres)
0
m
m
w
c
0
m
w
0
0 Total
® Primary
¦ Secondary
1 0 Surface
0 Storage
0 1 2 3 4 5 6 7
Storage (acre-feet)
Pond-2-Post Type 1124-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/1012009
. HydroCAD®9 00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 29
Hydrograph for Pond 2P: Pond 2
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (acre-feet) (feet) (cfs) (cfs) (cfs)
0.00 0.00 1.993 530.50 0.00 0.00 0.00
1
50 0.00 1.993 530.50 0.00 0.00 0.00
.
3.00 0.00 1.993 530.50 0.00 0.00 0.00
4.50 0.02 1.994 530.50 0.00 0.00 0.00
6.00 0.35 2.015 530.54 0.01 0.01 0.00
7.50 0.76 2.079 530.65 0.06 0.06 0.00
9.00 1.61 2.205 530.85 0.10 0.10 0.00
10.50 3.38 2.465 531.26 0.14 0.14 0.00
12.00 122.04 5.287 534.97 8.57 8.57 0.00
13.50 5.22 5.651 535.37 9.23 9.23 0.00
15.00 3.26 5.063 534.72 8.14 8.14 0.00
16.50 2.36 4.477 534.03 6.76 6.76 0.00
18.00 1.96 3.998 533.42 5.27 5.27 0.00
19.50 1.56 3.656 532.97 3.78 3.78 0.00
21.00 1.36 3.453 532.69 2.40 2.40 0.00
22.50 1.28 3.367 532.57 1.72 1.72 0.00
24.00 1.20 3.326 532.51 1.44 1.44 0.00
25.50 0.00 3.207 532.35 0.70 0.70 0.00
27.00 0.00 3.141 532.25 0.43 0.43 0.00
28.50 0.00 3.097 532.19 0.29 0.29 0.00
30.00
50
• 31 0.00
00
0 3.064
3.036 532.15
532.11 0.25
0.21 0.25
0.21 0.00
0.00
.
33.00 .
0.00 3.010 532.07 0.21 0.21 0.00
34.50 0.00 2.985 532.03 0.20 0.20 0.00
36.00 0.00 2.960 532.00 0.20 0.20 0.00
37.50 0.00 2.935 531.96 0.20 0.20 0.00
39.00 0.00 2.911 531.92 0.20 0.20 0.00
40.50 0.00 2.887 531.89 0.19 0.19 0.00
42.00 0.00 2.863 531.85 0.19 0.19 0.00
43.50 0.00 2.839 531.82 0.19 0.19 0.00
45.00 0.00 2.816 531.79 0.19 0.19 0.00
46.50 0.00 2.793 531.75 0.18 0.18 0.00
48.00 0.00 2.771 531.72 0.18 0.18 0.00

•
Pond _2_Post Type 11 24-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 30
Stage-Discharge for Pond 2P: Pond 2
•
•
Elevation Discharge Primary Secondary
(feet) (cfs) (cfs) (cfs)
525.00 0.00 0.00 0.00
525.15 0.00 0.00 0.00
525.30 0.00 0.00 0.00
525.45 0.00 0.00 0.00
525.60 0.00 0.00 0.00
525.75 0.00 0.00 0.00
525.90 0.00 0.00 0.00
526.05 0.00 0.00 0.00
526.20 0.00 0.00 0.00
526.35 0.00 0.00 0.00
526.50 0.00 0.00 0.00
526.65 0.00 0.00 0.00
526.80 0.00 0.00 0.00
526.95 0.00 0.00 0.00
527.10 0.00 0.00 0.00
527.25 0.00 0.00 0.00
527.40 0.00 0.00 0.00
527.55 0.00 0.00 0.00
527.70 0.00 0.00 0.00
527.85 0.00 0.00 0.00
528.00 0.00 0.00 0.00
528.15 0.00 0.00 0.00
528.30 0.00 0.00 0.00
528.45 0.00 0.00 0.00
528.60 0.00 0.00 0.00
528.75 0.00 0.00 0.00
528.90 0.00 0.00 0.00
529.05 0.00 0.00 0.00
529.20 0.00 0.00 0.00
529.35 0.00 0.00 0.00
529.50 0.00 0.00 0.00
529.65 0.00 0.00 0.00
529.80 0.00 0.00 0.00
529.95 0.00 0.00 0.00
530.10 0.00 0.00 0.00
530.25 0.00 0.00 0.00
530.40 0.00 0.00 0.00
530.55 0.02 0.02 0.00
530.70 0.07 0.07 0.00
530.85 0.10 0.10 0.00
531.00 0.12 0.12 0.00
531.15 0.13 0.13 0.00
531.30 0.15 0.15 0.00
531.45 0.16 0.16 0.00
531.60 0.17 0.17 0.00
531.75 0.18 0.18 0.00
531.90 0.19 0.19 0.00
532.05 0.20 0.20 0.00
532.20 0.29 0.29 0.00
532.35 0.69 0.69 0.00
532.50 1.35 1.35 0.00
532.65 2.17 2.17 0.00
Elevation Discharge Primary Secondary
(feet) (cfs) (cfs) (cfs)
532.80 3.04 3.04 0.00
532.95 3.71 3.71 0.00
533.10 4.28 4.28 0.00
533.25 4.77 4.77 0.00
533.40 5.22 5.22 0.00
533.55 5.63 5.63 0.00
533.70 6.01 6.01 0.00
533.85 6.37 6.37 0.00
534.00 6.70 6.70 0.00
534.15 7.03 7.03 0.00
534.30 7.33 7.33 0.00
534.45 7.63 7.63 0.00
534.60 7.91 7.91 0.00
534.75 8.19 8.19 0.00
534.90 8.45 8.45 0.00
535.05 8.71 8.71 0.00
535.20 8.96 8.96 0.00
535.35 9.20 9.20 0.00
535.50 9.44 9.44 0.00
535.65 13.47 13.47 0.00
535.80 20.64 20.64 0.00
535.95 29.86 29.86 0.00
536.10 41.74 40.73 1.02
536.25 57.05 53.02 4.03
536.40 74.79 66.59 8.20
536.55 94.53 81.32 13.22
536.70 108.33 89.56 18.76
536.85 114.99 90.19 24.80
537.00 122.37 90.81 31.56
Pond-2-Post Type 1124-hr Eden 25 year Rainfall=6.22"
Prepared by WSP SELLS Printed 9/10/2009
• H ydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 31
Stage-Area-Storage for Pond 2P: Pond 2
•
•
Elevation Surface Storage
(feet) (acres) (acre-feet)
525.00 0.101 0.000
525.15 0.123 0.017
525.30 0.145 0.037
525.45 0.167 0.060
525.60 0.189 0.087
525.75 0.210 0.117
525.90 0.232 0.150
526.05 0.249 0.186
526.20 0.256 0.224
526.35 0.263 0.263
526.50 0.271 0.303
526.65 0.278 0.344
526.80 0.285 0.387
526.95 0.292 0.430
527.10 0.307 0.475
527.25 0.325 0.522
527.40 0.343 0.572
527.55 0.362 0.625
527.70 0.380 0.681
527.85 0.399 0.739
528.00 0.417 0.800
528.15 0.424 0.863
528.30 0.430 0.927
528.45 0.437 0.992
528.60 0.444 1.058
528.75 0.450 1.125
528.90 0.457 1.194
529.05 0.464 1.263
529.20 0.470 1.333
529.35 0.477 1.404
529.50 0.484 1.476
529.65 0.491 1.549
529.80 0.498 1.623
529.95 0.505 1.698
530.10 0.520 1.775
530.25 0.539 1.854
530.40 0.559 1.937
530.55 0.579 2.022
530.70 0.599 2.110
530.85 0.620 2.202
531.00 0.640 2.296
531.15 0.648 2.393
531.30 0.656 2.491
531.45 0.664 2.590
531.60 0.672 2.690
531.75 0.680 2.791
531.90 0.688 2.894
532.05 0.695 2.998
532.20 0.703 3.102
532.35 0.711 3.208
532.50 0.718 3.316
532.65 0.726 3.424
Elevation Surface Storage
(feet) (acres) (acre-feet)
532.80 0.733 3.533
532.95 0.741 3.644
533.10 0.749 3.756
533.25 0.759 3.869
533.40 0.768 3.983
533.55 0.777 4.099
533.70 0.786 4.216
533.85 0.795 4.335
534.00 0.804 4.455
534.15 0.821 4.576
534.30 0.837 4.701
534.45 0.854 4.828
534.60 0.870 4.957
534.75 0.887 5.089
534.90 0.903 5.223
535.05 0.917 5.359
535.20 0.925 5.498
535.35 0.933 5.637
535.50 0.942 5.778
535.65 0.950 5.920
535.80 0.958 6.063
535.95 0.967 6.207
536.10 0.975 6.353
536.25 0.984 6.500
536.40 0.992 6.648
536.55 1.001 6.797
536.70 1.009 6.948
536.85 1.018 7.100
537.00 1.026 7.253
Pond-2-Post Type 11 24-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
41 H ydroCAD®9 00 s/n 04719 @2009 HydroCAD Software Solutions LLC Page 32
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA2: Post Runoff Area=18.150 ac 50.47% Impervious Runoff Depth=5.53"
Tc=5.0 min CN=86 Runoff=171.71 cfs 8.363 of
Pond 2P: Pond 2 Peak Elev=536.12' Storage=6.369 of Inflow=171.71 cfs 8.363 of
Primary=42.13 cfs 7.571 of Secondary=1.41 cfs 0.011 of Outflow=43.54 cfs 7.582 of
Total Runoff Area =18.150 ac Runoff Volume = 8.363 of Average Runoff Depth = 5.53"
49.53% Pervious = 8.990 ac 50.47% Impervious = 9.160 ac
•
C
u
Pond-2-Post Type 1124-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 33
Summary for Subcatchment DA2: Post
Runoff = 171.71 cfs @ 11.96 hrs, Volume= 8.363 af, Depth= 5.53"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 50 year Rainfall=7.17"
Area (ac) CN Description
5.850 98 Paved parking, HSG C
0.050 98 Unconnected pavement, HSG C
3.260 98 Roofs, HSG C
8.990 74 >75% Grass cover, Good, HSG C
18.150 86 Weighted Average
8.990 49.53% Pervious Area
9.160 50.47% Impervious Area
0.050 0.55% Unconnected
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment DA2: Post
•
Hydrograph
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 4
Time (hours)
0
Pond-2-Post Type // 24-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 34
Hydrograph for Subcatchment DA2: Post
•
•
Time Precip. Excess Runoff
(hours) ( inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.04 0.00 0.00
1.20 0.09 0.00 0.00
1.80 0.14 0.00 0.00
2.40 0.19 0.00 0.00
3.00 0.25 0.00 0.00
3.60 0.30 0.00 0.00
4.20 0.36 0.00 0.07
4.80 0.43 0.01 0.22
5.40 0.50 0.02 0.38
6.00 0.57 0.03 0.56
6.60 0.65 0.06 0.75
7.20 0.74 0.08 0.95
7.80 0.83 0.12 1.15
8.40 0.93 0.16 1.53
9.00 1.05 0.23 2.11
9.60 1.19 0.30 2.42
10.20 1.36 0.40 3.49
10.80 1.59 0.55 5.39
11.40 1.95 0.81 10.00
12.00 4.75 3.24 143.97
12.60 5.33 3.78 10.73
13.20 5.62 4.05 7.13
13.80 5.82 4.24 5.29
14.40 5.98 4.39 4.33
15.00 6.12 4.52 3.81
15.60 6.24 4.64 3.29
16.20 6.34 4.74 2.84
16.80 6.44 4.82 2.66
17.40 6.52 4.91 2.47
18.00 6.60 4.99 2.29
18.60 6.68 5.06 2.10
19.20 6.75 5.12 1.91
19.80 6.81 5.18 1.72
20.40 6.86 5.23 1.62
21.00 6.92 5.29 1.58
21.60 6.97 5.34 1.54
22.20 7.02 5.39 1.51
22.80 7.07 5.44 1.47
23.40 7.12 5.48 1.43
24.00 7.17 5.53 1.39
24.60 7.17 5.53 0.00
25.20 7.17 5.53 0.00
25.80 7.17 5.53 0.00
26.40 7.17 5.53 0.00
27.00 7.17 5.53 0.00
27.60 7.17 5.53 0.00
28.20 7.17 5.53 0.00
28.80 7.17 5.53 0.00
29.40 7.17 5.53 0.00
30.00 7.17 5.53 0.00
30.60 7.17 5.53 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 7.17 5.53 0.00
31.80 7.17 5.53 0.00
32.40 7.17 5.53 0.00
33.00 7.17 5.53 0.00
33.60 7.17 5.53 0.00
34.20 7.17 5.53 0.00
34.80 7.17 5.53 0.00
35.40 7.17 5.53 0.00
36.00 7.17 5.53 0.00
36.60 7.17 5.53 0.00
37.20 7.17 5.53 0.00
37.80 7.17 5.53 0.00
38.40 7.17 5.53 0.00
39.00 7.17 5.53 0.00
39.60 7.17 5.53 0.00
40.20 7.17 5.53 0.00
40.80 7.17 5.53 0.00
41.40 7.17 5.53 0.00
42.00 7.17 5.53 0.00
42.60 7.17 5.53 0.00
43.20 7.17 5.53 0.00
43.80 7.17 5.53 0.00
44.40 7.17 5.53 0.00
45.00 7.17 5.53 0.00
45.60 7.17 5.53 0.00
46.20 7.17 5.53 0.00
46.80 7.17 5.53 0.00
47.40 7.17 5.53 0.00
48.00 7.17 5.53 0.00
Pond-2-Post Type 1124-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAM 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 35
Summary for Pond 2P: Pond 2
Inflow Area = 18.150 ac, 50.47% Impervious, Inflow Depth = 5.53" for Eden 50 year event
Inflow = 171.71 cfs @ 11.96 hrs, Volume= 8.363 of
Outflow = 43.54 cfs @ 12.09 hrs, Volume= 7.582 af, Atten= 75%, Lag= 8.1 min
Primary = 42.13 cfs @ 12.09 hrs, Volume= 7.571 of
Secondary = 1.41 cfs @ 12.09 hrs, Volume= 0.011 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Starting Elev= 530.50' Surf.Area= 0.572 ac Storage= 1.993 of
Peak Elev= 536.12' @ 12.09 hrs Surf.Area= 0.976 ac Storage= 6.369 of (4.376 of above start)
Plug-Flow detention time= 421.5 min calculated for 5.585 of (67% of inflow)
Center-of-Mass det. time= 224.0 min ( 1,011.3 - 787.3 )
Volume Invert Avail Storage Storage Description
#1 525.00' 7.253 of Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) ( acres) (acre-feet) (acre-feet)
525.00 0.101 0.000 0.000
526.00 0.247 0.174 0.174
527.00
528.00 0.294
0.417 0.271 0.445
0.356 0.800
529.00 0.461 0.439 1.239
530.00 0.507 0.484 1.724
530.50 0.572 0.270 1.993
531.00 0.640 0.303 2.296
532.00 0.693 0.666 2.963
533.00 0.743 0.718 3.681
534.00 0.804 0.774 4.455
535.00 0.914 0.859 5.314
536.00 0.969 0.942 6.255
537.00 1.026 0.998 7.253
Device Routing Invert Outlet Devices
#1 Primary 524.80' 36.0" Round Culvert
L= 104.0' CMP, square edge headwall, Ke= 0.500
Outlet Invert= 523.00' S= 0.01737' Cc= 0.900
n= 0.025 Corrugated metal
#2 Device 1 530.50' 2.5" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#3 Device 1 532.10' 10.0" Vert. Orifice/Grate X 2.00 C=0.600
#4 Device 1 535.50' 60.0" x 60.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Secondary 536.00' 12.0' long x 19.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
0
Pond-2-Post Type 11 24-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9110/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 36
Primary OutFlow Max=41.91 cfs @ 12.09 hrs HW=536.12' (Free Discharge)
t-1=Culvert (Passes 41.91 cfs of 87.08 cfs potential flow)
2=Orifice/Grate (Orifice Controls 0.39 cfs @ 11.41 fps)
3=Orifice/Grate (Orifice Controls 9.96 cfs @ 9.13 fps)
4=Orifice/Grate (Weir Controls 31.56 cfs @ 2.56 fps)
Secondary OutFlow Max=1.26 cfs @ 12.09 hrs HW=536.12' (Free Discharge)
t-5=Broad-Crested Rectangular Weir (Weir Controls 1.26 cfs @ 0.91 fps)
¦ Inflow
0 Outflow
¦ Primary
¦ Secondary
•
is
Pond-2-Post Type 1124-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
• HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 37
Pond 2P: Pond 2
Stage-Discharge
532
0 531
?a
530
w
•
0

Pond 2P: Pond 2
Stage-Area-Storage
Surface/Horizontal/Wetted Area (acres)
Storage (acre-feet)
? Total
¦ Primary
¦ Secondary
1
? Surface
® Storage
0 10 20 30 40 50 60 70 80 90 100 110 120
Discharge (cfs)
Pond _2_Post Type 1124-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
• HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 38
Hydrograph for Pond 2P: Pond 2
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (acre-feet) (feet) (cfs) (cfs) (cfs)
0.00 0.00 1.993 530.50 0.00 0.00 0.00
1.50 0.00 1.993 530.50 0.00 0.00 0.00
3.00 0.00 1.993 530.50 0.00 0.00 0.00
4.50 0.14 1.997 530.51 0.00 0.00 0.00
6.00 0.56 2.038 530.58 0.03 0.03 0.00
7.50 1.05 2.130 530.73 0.08 0.08 0.00
9.00 2.11 2.299 531.00 0.12 0.12 0.00
10.50 4.25 2.635 531.52 0.17 0.17 0.00
12.00 143.97 5.981 535.71 16.41 16.41 0.00
13.50 6.10 5.732 535.45 9.36 9.36 0.00
15.00 3.81 5.202 534.88 8.41 8.41 0.00
16.50 2.75 4.630 534.22 7.16 7.16 0.00
18.00 2.29 4.141 533.60 5.76 5.76 0.00
19.50 1.82 3.769 533.12 4.33 4.33 0.00
21.00 1.58 3.524 532.79 2.96 2.96 0.00
22.50 1.49 3.410 532.63 2.07 2.07 0.00
24.00 1.39 3.360 532.56 1.67 1.67 0.00
25.50 0.00 3.224 532.37 0.79 0.79 0.00
27.00 0.00 3.150 532.27 0.46 0.46 0.00
28.50 0.00 3.104 532.20 0.30 0.30 0.00
30.00 0.00 3.070 532.15 0.25 0.25 0.00
31.50 0.00 3.041 532.11 0.22 0.22 0.00
33.00 0.00 3.015 532.07 0.21 0.21 0.00
34.50 0.00 2.989 532.04 0.20 0.20 0.00
36.00 0.00 2.964 532.00 0.20 0.20 0.00
37.50 0.00 2.940 531.97 0.20 0.20 0.00
39.00 0.00 2.915 531.93 0.20 0.20 0.00
40.50 0.00 2.891 531.90 0.19 0.19 0.00
42.00 0.00 2.867 531.86 0.19 0.19 0.00
43.50 0.00 2.843 531.83 0.19 0.19 0.00
45.00 0.00 2.820 531.79 0.19 0.19 0.00
46.50 0.00 2.797 531.76 0.18 0.18 0.00
48.00 0.00 2.774 531.73 0.18 0.18 0.00
E
•
Pond-2-Post Type II 24-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 39
Stage-Discharge for Pond 2P: Pond 2
•
C7
Elevation Discharge Primary Secondary
(feet) (cfs) (cfs) (cfs)
525.00 0.00 0.00 0.00
525.15 0.00 0.00 0.00
525.30 0.00 0.00 0.00
525.45 0.00 0.00 0.00
525.60 0.00 0.00 0.00
525.75 0.00 0.00 0.00
525.90 0.00 0.00 0.00
526.05 0.00 0.00 0.00
526.20 0.00 0.00 0.00
526.35 0.00 0.00 0.00
526.50 0.00 0.00 0.00
526.65 0.00 0.00 0.00
526.80 0.00 0.00 0.00
526.95 0.00 0.00 0.00
527.10 0.00 0.00 0.00
527.25 0.00 0.00 0.00
527.40 0.00 0.00 0.00
527.55 0.00 0.00 0.00
527.70 0.00 0.00 0.00
527.85 0.00 0.00 0.00
528.00 0.00 0.00 0.00
528.15 0.00 0.00 0.00
528.30 0.00 0.00 0.00
528.45 0.00 0.00 0.00
528.60 0.00 0.00 0.00
528.75 0.00 0.00 0.00
528.90 0.00 0.00 0.00
529.05 0.00 0.00 0.00
529.20 0.00 0.00 0.00
529.35 0.00 0.00 0.00
529.50 0.00 0.00 0.00
529.65 0.00 0.00 0.00
529.80 0.00 0.00 0.00
529.95 0.00 0.00 0.00
530.10 0.00 0.00 0.00
530.25 0.00 0.00 0.00
530.40 0.00 0.00 0.00
530.55 0.02 0.02 0.00
530.70 0.07 0.07 0.00
530.85 0.10 0.10 0.00
531.00 0.12 0.12 0.00
531.15 0.13 0.13 0.00
531.30 0.15 0.15 0.00
531.45 0.16 0.16 0.00
531.60 0.17 0.17 0.00
531.75 0.18 0.18 0.00
531.90 0.19 0.19 0.00
532.05 0.20 0.20 0.00
532.20 0.29 0.29 0.00
532.35 0.69 0.69 0.00
532.50 1.35 1.35 0.00
532.65 2.17 2.17 0.00
Elevation Discharge Primary Secondary
(feet) (cfs) (cfs) (cfs)
532.80 3.04 3.04 0.00
532.95 3.71 3.71 0.00
533.10 4.28 4.28 0.00
533.25 4.77 4.77 0.00
533.40 5.22 5.22 0.00
533.55 5.63 5.63 0.00
533.70 6.01 6.01 0.00
533.85 6.37 6.37 0.00
534.00 6.70 6.70 0.00
534.15 7.03 7.03 0.00
534.30 7.33 7.33 0.00
534.45 7.63 7.63 0.00
534.60 7.91 7.91 0.00
534.75 8.19 8.19 0.00
534.90 8.45 8.45 0.00
535.05 8.71 8.71 0.00
535.20 8.96 8.96 0.00
535.35 9.20 9.20 0.00
535.50 9.44 9.44 0.00
535.65 13.47 13.47 0.00
535.80 20.64 20.64 0.00
535.95 29.86 29.86 0.00
536.10 41.74 40.73 1.02
536.25 57.05 53.02 4.03
536.40 74.79 66.59 8.20
536.55 94.53 81.32 13.22
536.70 108.33 89.56 18.76
536.85 114.99 90.19 24.80
537.00 122.37 90.81 31.56
•
Pond _2_Post Type 1124-hr Eden 50 year Rainfall=7.17"
Prepared by WSP SELLS Printed 9/10/2009
HydroCAD®9 00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 40
Stage-Area-Storage for Pond 2P: Pond 2
•
•
Elevation Surface Storage
(feet) (acres) (acre-feet)
525.00 0.101 0.000
525.15 0.123 0.017
525.30 0.145 0.037
525.45 0.167 0.060
525.60 0.189 0.087
525.75 0.210 0.117
525.90 0.232 0.150
526.05 0.249 0.186
526.20 0.256 0.224
526.35 0.263 0.263
526.50 0.271 0.303
526.65 0.278 0.344
526.80 0.285 0.387
526.95 0.292 0.430
527.10 0.307 0.475
527.25 0.325 0.522
527.40 0.343 0.572
527.55 0.362 0.625
527.70 0.380 0.681
527.85 0.399 0.739
528.00 0.417 0.800
528.15 0.424 0.863
528.30 0.430 0.927
528.45 0.437 0.992
528.60 0.444 1.058
528.75 0.450 1.125
528.90 0.457 1.194
529.05 0.464 1.263
529.20 0.470 1.333
529.35 0.477 1.404
529.50 0.484 1.476
529.65 0.491 1.549
529.80 0.498 1.623
529.95 0.505 1.698
530.10 0.520 1.775
530.25 0.539 1.854
530.40 0.559 1.937
530.55 0.579 2.022
530.70 0.599 2.110
530.85 0.620 2.202
531.00 0.640 2.296
531.15 0.648 2.393
531.30 0.656 2.491
531.45 0.664 2.590
531.60 0.672 2.690
531.75 0.680 2.791
531.90 0.688 2.894
532.05 0.695 2.998
532.20 0.703 3.102
532.35 0.711 3.208
532.50 0.718 3.316
532.65 0.726 3.424
Elevation Surface Storage
(feet) (acres) (acre-feet)
532.80 0.733 3.533
532.95 0.741 3.644
533.10 0.749 3.756
533.25 0.759 3.869
533.40 0.768 3.983
533.55 0.777 4.099
533.70 0.786 4.216
533.85 0.795 4.335
534.00 0.804 4.455
534.15 0.821 4.576
534.30 0.837 4.701
534.45 0.854 4.828
534.60 0.870 4.957
534.75 0.887 5.089
534.90 0.903 5.223
535.05 0.917 5.359
535.20 0.925 5.498
535.35 0.933 5.637
535.50 0.942 5.778
535.65 0.950 5.920
535.80 0.958 6.063
535.95 0.967 6.207
536.10 0.975 6.353
536.25 0.984 6.500
536.40 0.992 6.648
536.55 1.001 6.797
536.70 1.009 6.948
536.85 1.018 7.100
537.00 1.026 7.253
Pond-2-Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
H ydroCADO 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 41
Time span=0.00-48.00 hrs, dt=0.03 hrs, 1601 points
Runoff by SCS TR-20 method, UH=SCS
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment DA2: Post Runoff Area=18.150 ac 50.47% Impervious Runoff Depth=6.54"
Tc=5.0 min CN=86 Runoff=200.66 cfs 9.884 of
Pond 2P: Pond 2 Peak Elev=536.54' Storage=6.782 of Inflow=200.66 cfs 9.884 of
Primary=79.70 cfs 8.947 of Secondary=12.68 cfs 0.152 of Outflow=92.39 cfs 9.100 of
Total Runoff Area =18.150 ac Runoff Volume = 9.884 of Average Runoff Depth = 6.54"
49.53% Pervious = 8.990 ac 50.47% Impervious = 9.160 ac
•
0
Pond _2_Post Type // 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Pape 42
Summary for Subcatchment DA2: Post
Runoff = 200.66 cfs @ 11.96 hrs, Volume= 9.884 af, Depth= 6.54"
Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Type II 24-hr Eden 100 year Rainfall=8.21"
Area (ac) CN Description
5.850 98 Paved parking, HSG C
0.050 98 Unconnected pavement, HSG C
3.260 98 Roofs, HSG C
8.990 74 >75% Grass cover, Good, HSG C
18.150 86 Weighted Average
8.990 49.53% Pervious Area
9.160 50.47% Impervious Area
0.050 0.55% Unconnected
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment DA2: Post
• Hydrograph
-
220 - - - - - _ ®Runoff
210 200.66 cfs .. -. ...J -. ; i. ?..- _
200 - -- -- - - - - -
Type 1l 24'hr-Eder' 1-0
190 - 'I- - - - *--;-_.,.-_.------------
-trRainfall=8.21,.
180-,
170 -- -ff --- 18 .150-----
160 - - - - R uno area=..15.ac
150 - Runoff Volume=9:884-af
140 --r-... -- -- -- i- - - - - - - - - - - - -- -- --- -- -- --?--r--------`--- --r--?--
y 130
-Runoff Depth=&54"
120
o - - - - - - - -- ---
3 110 --- - - ---' ----- --' ------ TC- al Q in -
LL -
- 100 CN=86
70
60 -
50 -- -- - - - - - - - - -----------------------------
40
30
20 -- -:-- -- -------- ;- - ------- -} -- ------ ;- --
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
•
•
Pond-2-Post Type// 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 43
Hydrograph for Subcatchment DA2: Post
•
•
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
0.00 0.00 0.00 0.00
0.60 0.05 0.00 0.00
1.20 0.10 0.00 0.00
1.80 0.16 0.00 0.00
2.40 0.22 0.00 0.00
3.00 0.28 0.00 0.00
3.60 0.35 0.00 0.04
4.20 0.42 0.00 0.20
4.80 0.49 0.02 0.39
5.40 0.57 0.03 0.59
6.00 0.66 0.06 0.81
6.60 0.75 0.09 1.04
7.20 0.85 0.13 1.27
7.80 0.95 0.17 1.52
8.40 1.06 0.23 1.97
9.00 1.21 0.31 2.69
9.60 1.37 0.41 3.03
10.20 1.56 0.53 4.32
10.80 1.82 0.71 6.60
11.40 2.23 1.03 12.06
12.00 5.44 3.88 167.86
12.60 6.10 4.51 12.44
13.20 6.43 4.82 8.26
13.80 6.67 5.05 6.12
14.40 6.85 5.22 5.01
15.00 7.01 5.37 4.41
15.60 7.14 5.50 3.81
16.20 7.26 5.62 3.29
16.80 7.37 5.72 3.07
17.40 7.47 5.82 2.86
18.00 7.56 5.91 2.64
18.60 7.65 5.99 2.42
19.20 7.72 6.06 2.21
19.80 7.79 6.13 1.99
20.40 7.86 6.19 1.87
21.00 7.92 6.25 1.83
21.60 7.98 6.31 1.78
22.20 8.04 6.37 1.74
22.80 8.10 6.43 1.70
23.40 8.16 6.48 1.65
24.00 8.21 6.54 1.61
24.60 8.21 6.54 0.00
25.20 8.21 6.54 0.00
25.80 8.21 6.54 0.00
26.40 8.21 6.54 0.00
27.00 8.21 6.54 0.00
27.60 8.21 6.54 0.00
28.20 8.21 6.54 0.00
28.80 8.21 6.54 0.00
29.40 8.21 6.54 0.00
30.00 8.21 6.54 0.00
30.60 8.21 6.54 0.00
Time Precip. Excess Runoff
(hours) (inches) (inches) (cfs)
31.20 8.21 6.54 0.00
31.80 8.21 6.54 0.00
32.40 8.21 6.54 0.00
33.00 8.21 6.54 0.00
33.60 8.21 6.54 0.00
34.20 8.21 6.54 0.00
34.80 8.21 6.54 0.00
35.40 8.21 6.54 0.00
36.00 8.21 6.54 0.00
36.60 8.21 6.54 0.00
37.20 8.21 6.54 0.00
37.80 8.21 6.54 0.00
38.40 8.21 6.54 0.00
39.00 8.21 6.54 0.00
39.60 8.21 6.54 0.00
40.20 8.21 6.54 0.00
40.80 8.21 6.54 0.00
41.40 8.21 6.54 0.00
42.00 8.21 6.54 0.00
42.60 8.21 6.54 0.00
43.20 8.21 6.54 0.00
43.80 8.21 6.54 0.00
44.40 8.21 6.54 0.00
45.00 8.21 6.54 0.00
45.60 8.21 6.54 0.00
46.20 8.21 6.54 0.00
46.80 8.21 6.54 0.00
47.40 8.21 6.54 0.00
48.00 8.21 6.54 0.00
Pond _2_Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCAM 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 44
Summary for Pond 2P: Pond 2
Inflow Area = 18.150 ac, 50.47% Impervious, Inflow Depth = 6.54" for Eden 100 year event
Inflow = 200.66 cfs @ 11.96 hrs, Volume= 9.884 of
Outflow = 92.39 cfs @ 12.05 hrs, Volume= 9.100 af, Atten= 54%, Lag= 5.6 min
Primary = 79.70 cfs @ 12.05 hrs, Volume= 8.947 of
Secondary = 12.68 cfs @ 12.05 hrs, Volume= 0.152 of
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.03 hrs
Starting Elev= 530.50' Surf.Area= 0.572 ac Storage= 1.993 of
Peak Elev= 536.54'@ 12.05 hrs Surf.Area= 1.000 ac Storage= 6.782 of (4.789 of above start)
Plug-Flow detention time= 368.6 min calculated for 7.106 of (72% of inflow)
Center-of-Mass det. time= 200.6 min ( 983.3 - 782.7 )
Volume Invert Avail.Storage Storage Description
#1 525.00' 7.253 of Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
(feet) ( acres) (acre-feet) (acre-feet)
525.00 0.101 0.000 0.000
526.00 0.247 0.174 0.174
. 527.00
528.00 0.294
0.417 0.271 0.445
0.356 0.800
529.00 0.461 0.439 1.239
530.00 0.507 0.484 1.724
530.50 0.572 0.270 1.993
531.00 0.640 0.303 2.296
532.00 0.693 0.666 2.963
533.00 0.743 0.718 3.681
534.00 0.804 0.774 4.455
535.00 0.914 0.859 5.314
536.00 0.969 0.942 6.255
537.00 1.026 0.998 7.253
Device Routing Invert Outlet Devices
#1 Primary 524.80' 36.0" Round Culvert
L= 104.0' CMP, square edge headwall, Ke= 0.500
Outlet Invert= 523.00' S= 0.01737' Cc= 0.900
n= 0.025 Corrugated metal
#2 Device 1 530.50' 2.5" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#3 Device 1 532.10' 10.0" Vert. Orifice/Grate X 2.00 C=0.600
#4 Device 1 535.50' 60.0" x 60.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#5 Seconda ry 536.00' 12.0' long x 19.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
C,
Pond _2_Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydrOCADO 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 45
Primary OutFlow Max=78.92 cfs @ 12.05 hrs HW=536.53' (Free Discharge)
L1=Culvert (Passes 78.92 cfs of 88.83 cfs potential flow)
2=Orifice/Grate (Orifice Controls 0.40 cfs @ 11.82 fps)
3=Orifice/Grate (Orifice Controls 10.52 cfs @ 9.64 fps)
4=Orifice/Grate (Weir Controls 67.99 cfs @ 3.31 fps)
Secondary OutFlow Max=12.38 cfs @ 12.05 hrs HW=536.53' (Free Discharge)
t-5=Broad-Crested Rectangular Weir (Weir Controls 12.38 cfs @ 1.96 fps)
® Inflow
O Outflow
® Primary
¦ Secondary
/ 1J
l
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Time (hours)
0

Pond-2-Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HvdroCAD®9 00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 46
Pond 2P: Pond 2
Stage-Discharge
? Total
¦ Primary
¦ Secondary
•
•
532
0 531
(D 530
U.1
0 10 20 30 40
50 60 70
Discharge (cfs)
80 90 100 110 120
Pond 2P: Pond 2
Stage-Area-Storage
Surface/Horizontal/Wetted Area (acres)
0 1
- -- -- -
537 - - - - - - - - - - - - - - ,
536
535 '
? -----?,-- _ - --- - - - - - - - - - - -?- - - - - - -
534 , --
533 -
w 532
0 531 - - - - - - - - - - - - - - - - - - iSt?Ie411'
d 530. -
w
529
- --------- ----------- --------- --------
528' --'
-' --------------- -----
5277
526
525 7
0 1 2 3 4 5 6
Storage (acre-feet)
? Surface
® Storage
Pond-2-Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
10 HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 47
Hydrograph for Pond 2P: Pond 2
Time Inflow Storage Elevation Outflow Primary Secondary
(hours) (cfs) (acre-feet) (feet) (cfs) (cfs) (cfs)
0.00 0.00 1.993 530.50 0.00 0.00 0.00
1.50 0.00 1.993 530.50 0.00 0.00 0.00
3.00 0.00 1.993 530.50 0.00 0.00 0.00
4.50 0.29 2.005 530.52 0.01 0.01 0.00
6.00 0.81 2.069 530.63 0.06 0.06 0.00
7.50 1.40 2.196 530.84 0.10 0.10 0.00
9.00 2.69 2.417 531.19 0.14 0.14 0.00
10.50 5.23 2.837 531.82 0.19 0.19 0.00
12.00 167.86 6.604 536.36 69.45 62.53 6.93
13.50 7.07 5.782 535.50 9.53 9.53 0.00
15.00 4.41 5.322 535.01 8.64 8.64 0.00
16.50 3.18 4.777 534.39 7.51 7.51 0.00
18.00 2.64 4.285 533.79 6.22 6.22 0.00
19.50 2.10 3.892 533.28 4.86 4.86 0.00
21.00 1.83 3.610 532.90 3.53 3.53 0.00
22.50 1.72 3.463 532.70 2.48 2.48 0.00
24.00 1.61 3.398 532.61 1.97 1.97 0.00
25.50 0.00 3.241 532.40 0.88 0.88 0.00
27.00 0.00 3.160 532.28 0.49 0.49 0.00
28.50 0.00 3.110 532.21 0.32 0.32 0.00
30.00 0.00 3.075 532.16 0.26 0.26 0.00
31.50 0.00 3.045 532.12 0.22 0.22 0.00
33.00 0.00 3.019 532.08 0.21 0.21 0.00
34.50 0.00 2.994 532.04 0.20 0.20 0.00
36.00 0.00 2.968 532.01 0.20 0.20 0.00
37.50 0.00 2.944 531.97 0.20 0.20 0.00
39.00 0.00 2.919 531.94 0.20 0.20 0.00
40.50 0.00 2.895 531.90 0.19 0.19 0.00
42.00 0.00 2.871 531.87 0.19 0.19 0.00
43.50 0.00 2.847 531.83 0.19 0.19 0.00
45.00 0.00 2.824 531.80 0.19 0.19 0.00
46.50 0.00 2.801 531.76 0.18 0.18 0.00
48.00 0.00 2.778 531.73 0.18 0.18 0.00
0
Pond-2-Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
HydroCADO 9.00 s/n 04719 © 2009 HydroCAD Software Solutions LLC Page 48
Stage-Discharge for Pond 2P: Pond 2
•
0
Elevation Discharge Primary Secondary
(feet) (cfs) (cfs) (cfs)
525.00 0.00 0.00 0.00
525.15 0.00 0.00 0.00
525.30 0.00 0.00 0.00
525.45 0.00 0.00 0.00
525.60 0.00 0.00 0.00
525.75 0.00 0.00 0.00
525.90 0.00 0.00 0.00
526.05 0.00 0.00 0.00
526.20 0.00 0.00 0.00
526.35 0.00 0.00 0.00
526.50 0.00 0.00 0.00
526.65 0.00 0.00 0.00
526.80 0.00 0.00 0.00
526.95 0.00 0.00 0.00
527.10 0.00 0.00 0.00
527.25 0.00 0.00 0.00
527.40 0.00 0.00 0.00
527.55 0.00 0.00 0.00
527.70 0.00 0.00 0.00
527.85 0.00 0.00 0.00
528.00 0.00 0.00 0.00
528.15 0.00 0.00 0.00
528.30 0.00 0.00 0.00
528.45 0.00 0.00 0.00
528.60 0.00 0.00 0.00
528.75 0.00 0.00 0.00
528.90 0.00 0.00 0.00
529.05 0.00 0.00 0.00
529.20 0.00 0.00 0.00
529.35 0.00 0.00 0.00
529.50 0.00 0.00 0.00
529.65 0.00 0.00 0.00
529.80 0.00 0.00 0.00
529.95 0.00 0.00 0.00
530.10 0.00 0.00 0.00
530.25 0.00 0.00 0.00
530.40 0.00 0.00 0.00
530.55 0.02 0.02 0.00
530.70 0.07 0.07 0.00
530.85 0.10 0.10 0.00
531.00 0.12 0.12 0.00
531.15 0.13 0.13 0.00
531.30 0.15 0.15 0.00
531.45 0.16 0.16 0.00
531.60 0.17 0.17 0.00
531.75 0.18 0.18 0.00
531.90 0.19 0.19 0.00
532.05 0.20 0.20 0.00
532.20 0.29 0.29 0.00
532.35 0.69 0.69 0.00
532.50 1.35 1.35 0.00
532.65 2.17 2.17 0.00
Elevation Discharge Primary Secondary
(feet) (cfs) (cfs) (cfs)
532.80 3.04 3.04 0.00
532.95 3.71 3.71 0.00
533.10 4.28 4.28 0.00
533.25 4.77 4.77 0.00
533.40 5.22 5.22 0.00
533.55 5.63 5.63 0.00
533.70 6.01 6.01 0.00
533.85 6.37 6.37 0.00
534.00 6.70 6.70 0.00
534.15 7.03 7.03 0.00
534.30 7.33 7.33 0.00
534.45 7.63 7.63 0.00
534.60 7.91 7.91 0.00
534.75 8.19 8.19 0.00
534.90 8.45 8.45 0.00
535.05 8.71 8.71 0.00
535.20 8.96 8.96 0.00
535.35 9.20 9.20 0.00
535.50 9.44 9.44 0.00
535.65 13.47 13.47 0.00
535.80 20.64 20.64 0.00
535.95 29.86 29.86 0.00
536.10 41.74 40.73 1.02
536.25 57.05 53.02 4.03
536.40 74.79 66.59 8.20
536.55 94.53 81.32 13.22
536.70 108.33 89.56 18.76
536.85 114.99 90.19 24.80
537.00 122.37 90.81 31.56
Pond-2-Post Type 11 24-hr Eden 100 year Rainfall=8.21 "
Prepared by WSP SELLS Printed 9/10/2009
• HydroCADO 9.00 s/n 04719 0 2009 HydroCAD Software Solutions LLC Page 49
Stage-Area-Storage for Pond 2P: Pond 2

Elevation Surface Storage
(feet) (acres) (acre-feet)
525.00 0.101 0.000
525.15 0.123 0.017
525.30 0.145 0.037
525.45 0.167 0.060
525.60 0.189 0.087
525.75 0.210 0.117
525.90 0.232 0.150
526.05 0.249 0.186
526.20 0.256 0.224
526.35 0.263 0.263
526.50 0.271 0.303
526.65 0.278 0.344
526.80 0.285 0.387
526.95 0.292 0.430
527.10 0.307 0.475
527.25 0.325 0.522
527.40 0.343 0.572
527.55 0.362 0.625
527.70 0.380 0.681
527.85 0.399 0.739
528.00 0.417 0.800
528.15 0.424 0.863
528.30 0.430 0.927
528.45 0.437 0.992
528.60 0.444 1.058
528.75 0.450 1.125
528.90 0.457 1.194
529.05 0.464 1.263
529.20 0.470 1.333
529.35 0.477 1.404
529.50 0.484 1.476
529.65 0.491 1.549
529.80 0.498 1.623
529.95 0.505 1.698
530.10 0.520 1.775
530.25 0.539 1.854
530.40 0.559 1.937
530.55 0.579 2.022
530.70 0.599 2.110
530.85 0.620 2.202
531.00 0.640 2.296
531.15 0.648 2.393
531.30 0.656 2.491
531.45 0.664 2.590
531.60 0.672 2.690
531.75 0.680 2.791
531.90 0.688 2.894
532.05 0.695 2.998
532.20 0.703 3.102
532.35 0.711 3.208
532.50 0.718 3.316
532.65 0.726 3.424
Elevation Surface Storage
(feet) (acres) (acre-feet)
532.80 0.733 3.533
532.95 0.741 3.644
533.10 0.749 3.756
533.25 0.759 3.869
533.40 0.768 3.983
533.55 0.777 4.099
533.70 0.786 4.216
533.85 0.795 4.335
534.00 0.804 4.455
534.15 0.821 4.576
534.30 0.837 4.701
534.45 0.854 4.828
534.60 0.870 4.957
534.75 0.887 5.089
534.90 0.903 5.223
535.05 0.917 5.359
535.20 0.925 5.498
535.35 0.933 5.637
535.50 0.942 5.778
535.65 0.950 5.920
535.80 0.958 6.063
535.95 0.967 6.207
536.10 0.975 6.353
536.25 0.984 6.500
536.40 0.992 6.648
536.55 1.001 6.797
536.70 1.009 6.948
536.85 1.018 7.100
537.00 1.026 7.253
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August 28, 2009
North Carolina Department of Environment and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
ATTN: Information Management
Reference: NON-RESIDENTIAL WELL CONSTRUCTION
RECORDS - SUBMITTAL #1
Duke Energy Dan River Generating Facility
900 S. Edgewood Road
Eden, North Carolina
S&ME Project No. 1261-08-515 (Phase 300)
Ladies and Gentlemen:
• On behalf of Duke Energy, S&ME, Inc. (S&ME) is submitting the enclosed completed
and signed Non-Residential Well Construction Records for the following two (2)
groundwater monitoring wells installed at the Dan River Generating Facility (DRGF) site
in Eden, North Carolina. The following table contains the ID and coordinates for the
installed wells.
Table 1: Well Coardinntna
Well [D Northing Easting
PZ-1 998282.26 9788678.90
PZ-2 997544.23 9787592.72
Note: Northing and fasting coordinates and ground surface elevations
were provided by Chas. H. Sells. Inc. based on the North
Carolina State Plane Coordinate System (NAD 83/2001).
Dube Energy is voluntarily installing groundwater monitoring wells and/or piezometers
at DRGF as part of a geotechnical evaluation for the proposed Combined Cycle project.
r?
U
S&ME, INC. 1301 Zima Park Drive / Spartanburg, SC 29301 /p 864,574.2360 f 864.576,8730
One Marcus Drive, Suite 301 / Greenville, SC 2961.5 I P 864-232-8987/ www.smeinc.com
•
•
•
Non-Residential Well Construction Records - Submittal #1 S&ME Project No. 1261-08-515
Duke Energy Buck 6eneratina Facilifiv August 28 20D9
On behalf of Duke Energy, S&ME thanks you for your receipt of these records. Should
you have any questions or treed additional information, please contact us.
Sincerely,
S&ME, Inc.
V
Michael Revis, PE
Senior Engineer
cc: Mr. Bobby Pratt, Duke Energy
Mr. George Tolbert, Duke Energy
Mr. Tim Russell, The Shaw Group
S;IGEOTECf!{2ppHlb10S31 S (Gorr River CTCC/ISlornr i{'aler PondriM 1Ye1! FomrrlncAerrr nrll recrords ruGrulua! (lhri Rivrr Nl).doc
ct
2
. STAT£,
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NONRESIDENTIAL WELL CONSTRUCTION RECORD
North Carolina Department of Flivironmew and Natural Resources- Division of Water Quality
IV L L CONTRACTOR CERTIFICATION # 2626
1, WELL CONTRACTOR:
Ted Miller
Well Contractor (Individual} Name
SWE Inc.
Well Contractor Company Name
301 Zima Park Drive
Street Address
Spartanburg SC 29301
City or Town State Zip Code
(864 ) 574-2360
Area code Phone number
2. WELL INFORMATION:
WELL CONSTRUCTION PERMIT#'NlA
OTHER ASSOCIATED PERMIT#(it applicable)NIA -
SITE WELL ID #(it applicable) PZ-1
3. WELL USE (Check One Box) Monitoring V Municipal/Public C1
Industrial/Commercial r1 Agricultural n Recovery F Injection
IrrigationLI Other I7 (list use) -
DATE DRILLED 8/19/09
4. WELL LOCATION:
S Edoewood Road. 900, 27288 _ _
(Street Name, Numbers, Community, Subdivision, Lot No., Parcel, Zip Code)
• CITY: Eden COUNTY Rockingham
TOPOGRAPHIC / LAND SETTING: (check appropriate box)
Alope L7 Valley ? Flat FiRidge n Other
LATITUDE 35 - °_' _" DMS OR 36.49062704 DO
LONGITUDE 80 "DMS OR 793187$502 DD
Latitude/longitude source: VGPS Oropographic map
(location of well must be shown on a USGS logo map andatlached to
this form if nor using GPS)
5, FACILITY (Name of the business where the well is located.)
Dan River C?eneratina Fay
Facility Name Facility ID# (if applicable)
900 dnewood Road
Street Address
Eden N 27288
City or Town State Zip Code
-Duke. Enemy
Contact Name
900 S dclewootl Road
Mailing Address
Eden Nf'?7i3
City or Town State Zip Code
(33-6-b -U3--D2.Q.2.___.___- _
Area code Phone number
6. WELL DETAILS:
a. TOTAL DEPTH: et
b. DOES WELL REPLACE EXISTING WELL? YES 1-} NOG /
• c. WATER LEVEL Below Top of Casing: Ja 2 FT,
(Use "+" if Above Top of Casing)
d. TOP OF CASING IS 2.5 FT Above Land Surface'
'Top of casing terminated at/or below land surface may require
a variance in accordance with 15A NCAC 2C 0118,
' e. YIELD (gpm): N/A METHOD OF TEST N/A
'f. DISINFECTION: Type_ NIA Amount _N/A
g. WATER ZONES (depth):
Top_11.5 Bottom 21.5 Top _ Bottom
' TO P_...___,_. - Bottom__.,_.__. -- Top-- ._._ ._._,__. - Bottom_ __.._ ._...__
Top Bottorn Top Bottom
Thickness/
7. CASING: Depth Diameter Weight Material
: Top +2.5 Bottom 11.5 Fl. 2 in. S 40 PVC
Toll Bottom Ft.
Top Bottom Ft.
8. GROUT: Depth Material Method
Top 0 Bottom 0.5 Ft. Cement Hand Place
;Top 0.5 Bottom 8,5 Ft. Bentonite Pour
1-op Bottom Ft.
9. SCREEN: Depth Diameter Slat Size . Material
Top 11.5 Bottom 21.5 Ft. 2 in, 0.01 in. S 40 PVC
Top Bottom Ft. in, in.
Top Bottom Ft. in, in.
10. SAND/GRAVEL PACK:
Depth Size Material
Top 8.5 _Botiorn_21.5 . Ft. #2-._-_ _Sand
Top Bottom Fl.
Top Bottom Fl.
11. DRILLING LOG
Top Bottom Formation Description
0 / 9.5 Residual -Fine sandy SILT
9.5 ! 13.5 SWR - Silty fine to med. SAND
13.5 /21.5 _SWIR - Silty fine to med SAND
1
/
12. REMARKS:
I DO HERESY CERTIFY TI 147 THIS WELL WAS CONSTRUCTED IN ACCORDANCE WITH
• 15A NCAC 2C, WELL C014STRUCTION STANDARDS. AND THAT A COPY OF THIS
RECORD HAS BEEN OVIDED TO THE W - OWNER,
SIGNATURE OF CERTIFIED WELL CONTRACTOR DATE
PRINTED NAME OF PERSON CONSTRUCTING THE WELL
Submit the original to the Division of Water Quality within 30 days: Attn: Information Mgt., Form 1/08
1617 Mail Service Center Raleigh, NC 27699-1617 Phone No. (919) 807µ630t} Rev. 11108
a 5TAiF?-'
r,a r 4
1. WELL CONTRACTOR:
Ted Miller
NONRESIDENTIAL WELL CONS-1-RUCTION RECORD
:Mortal Csirnlina Department or t:nvironmcnt and Natural Resources- Division of Water Quality
WELL CONTRACTOR CI R'TIBICrt+TION # 2626
Well Contractor (Individual) Name
S&ME. Inc.
Well Contractor Company Narne ~?-
301 Zima Park Drive
Street Address
Spartanbura SC 29301
City or Town State Zip Cade
&-Q4-) 574-2360
._
Area code Phone number
2. WELL INFORMATION:
WELL CONSTRUCTION PERMIT# N/A
OTHER ASSOCIATED PERMIT#(if applicablo) N/A
SITE WELL I D #(ir applicable) PZ-2
3. WELL USE (Check One Box) Monitoring L? Municipal/Public D
Industrial/Commercial CI Agricultural p Recovery D Injection D
Irrigation? Other D (list use) ___._. ____
DATE DRILLED 8/18/09
4. WELL LOCATION:
S Edaewood Road. 900, 27288
(Street Name, Numbers, Community, Subdivision, Lot No., Parcel, Zip Code)
• CITY: Eder! COUNTY Rockingham
TOPOGRAPHIC ! LAND SETTING: (check appropriate box)
[Slope DValley DFlat DRidge DOther
LATITUDE 35 DMS OR 36.4.8857849 DD
LONGITUDE 80 "DMS OR 79.72246113 DO
Latitudeflongitude source: MPS Qropographic map
(location of well must be shown on a USGS topo map andettached to
this form if not using GPS)
5. FACILITY (Name of the business where the well is located.)
D?11 _f3lv.?L.G?1?3111]f?._ F._ 1G?_
Facility Name Facility ID# (if applicable)
900 S. Fdo .wood Road
Street Address
Eden N ..?7
City or Town State Zip Code
Duke EnP.rmz
Contact Name
...900 S EdN?Qd Road
Mailing Address
Eel . n N
City or Town State Zip Code
(- _flL0202
Area code Phone number
6. WELL DETAILS:
a. TOTAL DEPTH:_ 33 Feel
b. DOES WELL REPLACE EXISTING WELL? YES D NO IV
• c. WATER LEVEL Below Top of Casing: _ `( 7.8 FT.
(Use "+" if Above Top of Casing)
d. TOP OF CASING IS 2.5 1--T. Above Land Surface`
'Top of casing terminated at/or below land surface may require
a variance in accordance with 15A NCAC 2C .0118.
e. YIELD (gpm): N/_ METHOD OF TEST N/A
f. DISINFECTION: Type NIA Amount N/A
g. WATER ZONES (depth):
Top. 15___- Bottom 33 Top Bottom
Top Bottom Top„_,_ - Bottom
Top Bottom Top Botlom
Thickness/
7. CASING: Depth Diameter Weight Material
Top--!L2 5
. Bottom 23 Ft. 2 in. S 40 PVC
Top Bottom Ft.
Top Bottom Ft.
8. GROUT: Depth Material Method
Top 0 Bottom 0.5 Ft. Cement Hand Place
Top 0.5 __ Bottom 18.7 Ft. Bentonite Pour
Top Bottom Ft.
9. SCREEN: Depth Diameter Slot Size Material
Top 23 Bottom 33 Ft. 2 in. 0.01 in. S 40 PVC
Top Bottom FL_ in. in.
Top Bottom Ft. in. in.
: 10. SAND/GRAVEL PACK:
Depth Size Material
Top 18.7 Bottom 31 _ Ft._#2.....___....__.. Sand
Top Bottom Ft.
Top Bottom Ft,
11. DRILLING LOG
Top Bottom
0 /6
6 / 8.5
8.5 r 14
1_/ 23.5
23.5 / 28.5
28.5 / 33.5
3.5534.3
Formation Description
Fill - Fine Sandy Clavev SILT
Fill - Fine Sandy Clayey Silt
Residual - Clayey fine Sandy SIL'
?WR - Fine Sandy Silt
Residual - Fine Sandy Silt
Residual - Fine Sandy Silt w/ Roc
SWR - Fine Sandy Silt
12. REMARKS:
1 DO HEREBY CERTIFY THAT THIS WELL WAS CONSTRUCTED IN ACCORDANCE WITH
' I $A.NC,AC 2C. WELL CONSTRUCTION STANDARDS, AND THAT A COPY OF THIS
RECORD HAS BEEN P OVIDED TO THE WELL WNER
SIGNATURE OF CERTIFIED WELL C RACTOR DATE
Ted Miller
PRINTED NAME OF PERSON CONSTRUCTING THE WELL
Submit the original to the Division of Water Quality within 30 days. Attn: information Mgt., Form CW-1b
1617 Mail Service Center- Raleigh, NC 27699-1617 Phone No. [phone] Rev. 11/08