HomeMy WebLinkAbout20080680 Ver 1_More Info Received_20090109()8- 01.080
peat St?itG? Znjineerinj, Inc. k "Ak?
139 Pine/ iurst Aev. Ste C
J Southern Pines, NC 28387
Phone: (910) 695-8825
Fax: (910) 695-8832,
wwrv.nsengineering.com
Letter of Transmittal JAN 2009
DENR - WATER QUALITY
WET! ANDS AND STOMAWATER BR+'h?H
To: Cyndi Karoly Date: 1/08/09
NC Division of Water Quality Job Number: 0522502
2321 Crabtree Blvd. Suite 250 Job Name: Savannah's Garden Subdivision
Raleigh, NC 27604 Via: UPS
This Transmission includes the following:
..._ ......................._._..:
Attached
r Samples
? Plans
................... _.__.._? Prints
_.... _ ............... _..._...i Specifications
.................. _...... _
Shop Drawings
Other
These are transmitted:
.. . . . . . . . . . . ................
For approval
............................. For your use
As requested
r Approved as submitted
Approved as noted
? For review/comment
....
Other
Please take the following action:
........................... _ ... _ .
Submit
i. _._....__............_ Resubmit
............................ . . .
Return
Make corrections and return
Copies Date Number Description
............................................. ---.I_.......
5 .................................................. ........
1/08/09 ......... _..... _.... _.................................
0522502 ... ..... .... ........................................... ..................................... ....__.............. ..... ............_.._................................ _..- -._._....._.....................__..........
Cover, C1-C5 of 5 Stormwater Management
Plans-Stormwater Wetlands
5 ....................... _..:...... ..
1/08/09 ..... ................. ................................. _.
0522502 ........ .... .......................................
Stormwater Wetlands-BMP Supplement
-..._.._.._..5............_._.+..... _.. .................................................. ........ ........
............ .........................._........
0522502
......._...._.........._....._.__....._.....__
. . ............ _ ......
........ ..... .......................................... ........................ ......._...__._..._................
Operating and Maintenance Agreement
-
5
.......................... ........._........_ ; ........... --
1/08/09 !
..........
_. ---.._ .......................................
0522502 ...............................................................
---_
................................ ...------ _.._.........
Required Items Checklist
5 .
............................._._.........
1/08/09 .......................... .................... ..........
0522502 ........ ..........................- .._.._..... _...................... - .............................. _.._....... _........
__-
Soils Report
i_ .........
5 ..................................................:........
1/08/09 ! ..........................................................
0522502 ........,........._...................--........................................_ .
Calculations
t....._.._
1 .._._.._..- --..__...._.._...;--
1/08/09 -.._...._ ................................. ........
0522502 ............... _........ .......... .......................................... _.... _.. ..... _...... _._ ....._...... __..............
Response Letter/DWQ Comments Letter
Remarks:
Please call if you have any questions.
Bryan C Welborn
January 8, 2009
Cyndi Karoly
NC Division of Water Quality
2321 Crabtree Blvd. Suite 250
Raleigh, NC 27604
Re: Savannah's Garden for Quality Built Homes
Carthage, North Carolina
Response to Letter dated December 9, 2008
NSE Job #0522502
DWQ Project #08-0680
Dear Cyndi Karoly,
This letter is in response to a letter dated November 10, 2008. DWQ's comments have
been copied and italicized and our responses are as follows:
1. The DWQ remains unconvinced that Drainage Area 4 is low density. Based on the
topography, the open space to the left of the swale that serves Drainage Area 4 is
not part of the drainage area and therefore it is not appropriate to include it in
impervious surface calculations. Once that open space is removed from Drainage
Area 4, then it will clearly be greater than 24% impervious and will require a
stormwater management plan.
If you wish to retain the currently proposed site plan, then an appropriately
selected and designed BMP must be provided to treat the stormwater from
Drainage Area 4. Please provide a completer BMP Supplement Form with all
required items...
NSE has provided the appropriate stormwater management plan with the
required BMP Supplement Form with all required items.
Neal Smith F,ngineering, /nc. Southern Pincs, NC'
DWQ NOV
NSE Job # 0522502
2
2. The only possibility that the DWQ can identify of keeping Drainage Area 4 below
24% impervious by taking ALL THREE of the following steps:
1. Permanently protecting the open space north of lots 9-13.
2. Permanently protecting the open space across from lots 25-26, AND
3. Permanently abandoning plans to develop lots 14-17, 19, and 42.
The owner will comply with the requirements of statement #1.
If you have additional comments, please feel free to call me at 695-8825.
Sincerely,
NEAL SMITH ENGINEERING, INC.
A. Scott Matthews, PLS, Principal
Neal Siuith Englucei'iug. h1c. Soulhcru Pnncs, NC
r O?CF W A T ?RQ?i Michael F. Easley, Govemor
William G. Ross Jr., Secretary
r North Carolina Department of Environment and Natural Resources
O C Coleen H. Sullins, Director
Division of Water Quality
December 9, 2008
DWQ Project # 08-0680
Moore County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Ron Jackson
Quality Built Homes, Inc. ; \Y/ A`
Fields Drive p L - L? ?'! A`
Aberdeen, NC 28315-8611
JAN 9 20,99
Subject Property: Savannah's Garden Subdivision
Killets Creek [03061, 17-30-3-(1), WSIII, CA] DENR-OfAlEi°,t.0AL';ti
Tai,gNDS AND ST0R%. iWATEC .bRA.NG.4
REQUEST FOR MORE INFORMATION
Dear Mr. Jackson:
On April 11, 2008, the Division of Water Quality (DWQ) received your application dated April 9, 2008,
to fill or otherwise impact 0.48 acres of 404/wetland to construct a residential development at the site. On
May 12, 2008, September 30, 2008,.November 3, 2008, and December 8, 2008, the DWQ received
additional information from you, however, the DWQ has determined that your application remains
incomplete and/or provided inaccurate information as discussed below. The DWQ will require additional
information in order to process your application to impact protected wetlands and/or streams on the
subject property. Therefore, unless we receive five copies of the additional information requested below,
we will place this project on hold as incomplete until we receive this additional information. If we do not
receive the requested information, your project will be formally returned as incomplete. Please provide
the following information so that we may continue to review your project.
Additional Information Requested:
1. The DWQ remains unconvinced that Drainage Area 4 is low density. Based on the topography,
the open space to the left of the Swale that serves Drainage Area 4 is not part of the drainage area
and therefore it is not appropriate to include it in impervious surface calculations. Once that open
space is removed from Drainage Area 4, then it will clearly be greater than 24% impervious and
will require a stormwater management plan.
If you wish to retain the currently proposed site plan, then an appropriately selected and designed
BMP must be provided to treat the stormwater from Drainage Area 4. Please provide a
completed BMP Supplement Form with all required items (see
http://h2o.eiir.state.iic.us/su/bmp forms.htm.
2. The only possibility that the DWQ can identify of keeping Drainage Area 4 below 24%
impervious by taking ALL THREE of the following steps:
1. Permanently protecting the open space north of lots 9-13,
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: 919-733-1786 / FAX 919-733-6893 / Internet: littL).('h2n enr.state. nc.u>,_nc,,vctlands
"_pr?trttCarolina
Aaturallry
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Quality built Homes, 1nc.
Page 2 of 3
December 9, 2008
2. Permanently protecting the open space across from lots 25-26, AND
3. Permanently abandoning plans to develop lots 14-17, 19 and 42.
If you are interested in pursing the low density option, then please provide calculations for the
above conditions in order for the DWQ to determine whether or not low density criteria has been
met.
Please submit this information within 30 calendar days of the date of this letter. If we do not receive this
requested information within 30 calendar days of the date of this letter, your project will be withdrawn
and you will need to reapply with a new application and a new fee.
This letter only addresses the application review and does not authorize any impacts to wetlands, waters
or protected buffers. Please be aware that any impacts requested within your application are not
authorized (at this time) by the DWQ. Please call Ms. Cyndi Karoly or Mr. Ian McMillan at 919-733-
1786 if you have any questions regarding or would like to set up a meeting to diAckss this matter.
Sincerely,
4tL
4
Cyndi Karoly, Supervisor
401 Oversight/Express Review Permitting Unit
CBK/ijm
cc: Ken Averitte, DWQ Fayetteville Regional Office
Chad Turlington, DWQ Fayetteville Regional Office
Belinda Henson, DWQ Fayetteville Regional Office
Emily Burton, USACE Wilmington Regulatory Field Office
File Copy
Matt Matthews, DWQ Branch Manager
Jennifer Freeman, Dr. J.H. Carter & Associates, Inc., 515-F Midland Road, Southern Pines, NC 28387
Shelton Sullivan, DWQ Compliance and Enforcement
Phillip Reynolds, Attorney General's Office
Neal Smith Engineering, 139 Pinehurst Avenue, Suite C, Southern Pines, NC 28387
Filename: 080680Sava nnahsGardenSD(Moore)On_Hold5
Permit No.
8 '- 0 6 8 0 (to be provided by DWQ)
IIL REQUIRED ITEMS' CHECKLIST
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.
Initials Pagel Plan
Sheet No.
C1 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),
- Wetland dimensions (and length to width ratio),
Pretreatment system,
- Maintenance access,
Proposed drainage easement and public right of way (ROW),
Overflow device, and
Boundaries of drainage easement.
C1 2. Plan details (1" = 50' or larger) for the wetland showing:
Wetland dimensions (and length to width ratio)
- Pretreatment system,
Maintenance access,
Proposed drainage easement and public right of way (ROW),
Design at ultimate build-out,
Off-site drainage (if applicable),
Overflow device, and
Boundaries of drainage easement.
C2 3. Section view of the wetland (1" = 20' or larger) showing:
Side slopes, 3:1 or lower
- Wetland layers
All wetlands: Shallow land depth, shallow water depth, deep pool depth
Option 1, no clay liner: SLWT depth
Option 2, clay liner: Depth of topsoil on top of liner, liner specifications
C3 4. A detailed planting plan (1 " = 20' or larger) prepared by a qualified individual showing:
A variety of suitable species (not including cattails),
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.
C2 5. A construction sequence that shows how the wetland will be protected from sediment until the entire
drainage area is stabilized.
A
Booklet 6. The supporting calculations (including drawdown calculations).
Attached 7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
N/A 8. A copy of the deed restrictions (if required).
Booklet 9. 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.
SW401-Wetla nd-Rev.3 Part III, page 1 of 1
January 8, 2009
Re: Savannah's Garden for Quality Built Homes
Carthage, North Carolina
Stormwater Wetland Operation and Maintenance Agreement
NSE Job #0522502
DWQ Project #08-0680
The owner is finalizing the Stormwater Wetland and Maintenance Agreement and NSE
will forward the signed agreement upon completion.
Neal 5/)11117I?i? rn?°rrii?„ Ill(. Solilhcrrt Pillc.?, NC
Permit No.
(to be provided by DWQ)
Jill. : REQUIRED ITEMS CHECKLIST
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.
Initials Page/ Plan
Sheet No.
C1 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),
- Wetland dimensions (and length to width ratio),
Pretreatment system,
Maintenance access,
Proposed drainage easement and public right of way (ROW),
Overflow device, and
Boundaries of drainage easement.
C1 2. Plan details (1" = 50' or larger) for the wetland showing:
Wetland dimensions (and length to width ratio)
Pretreatment system,
Maintenance access,
- Proposed drainage easement and public right of way (ROW),
Design at ultimate build-out,
Off-site drainage (if applicable),
Overf low device, and
Boundaries of drainage easement.
C2 3. Section view of the wetland (1" = 20' or larger) showing:
Side slopes, 3:1 or lower
- Wetland layers
All wetlands: Shallow land depth, shallow water depth, deep pool depth
Option 1, no clay liner: SLWT depth
Option 2, clay liner: Depth of topsoil on top of liner, liner specifications
C3 4. A detailed planting plan (1 " = 20' or larger) prepared by a qualified individual showing:
A variety of suitable species (not including cattails),
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.
C2 5. A construction sequence that shows how the wetland will be protected from sediment until the entire
drainage area is stabilized.
,?
/' ' Booklet 6. The supporting calculations (including drawdown calculations).
Attached 7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
N/A 8. A copy of the deed restrictions (if required).
Booklet 9. 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.
SW401-Wetla nd-Rev.3
Part III, page 1 of 1
January 8, 2009
Re: Savannah's Garden for Quality Built Homes
Carthage, North Carolina
Stormwater Wetland Operation and Maintenance Agreement
NSE Job #0522502
DWQ Project #08-0680
The owner is finalizing the Stormwater Wetland and Maintenance Agreement and NSE
will forward the signed agreement upon completion.
Neu/ Srrtith I nghwerirrg, ]u('. Southcra Pales, NC
r
OF W A TF9
A G'A O? ?G
T
r
NCDENR Y
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WETLAND SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all the required information.
L' PROJECT' INFORMATION
Project name Savannah's Garden
Contact name Ron Jackson
Phone number 910-295-0365
Date January 6, 2009
Drainage area number 4
111. DESIGN INFORMATION
Site Characteristics
Drainage area 784,041.00 ft2
Impervious area 209,956.00 ft2
Percent impervious 26.8%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
1-yr, 24-hr rainfall depth
1-yr, 24-hr intensity
Pre-development 1-yr, 24-hr runoff
Post-development 1-yr, 24-hr runoff
Pre/Post 1-yr, 24-hr peak control
Storage Volume: Non-SA Waters
Minimum required volume
08- 062c) Permit Number
(to be provided by DWQ)
3.08 in
0.13 in/hr
11.09 ft3/sec
26.06 ft3/sec
14.97 ft3/sec
19,014.00 ft3
Volume provided (temporary pool volume) 19,411.00 ft3 OK
Depth of temporary pool/ponding depth (DPia,ts) 12.00 in OK
Drawdown time 3.20 days OK
Diameter of orifice 1.50 in OK
Coefficient of discharge (CD) used in orifice diameter
calculation
Driving head (Ho) used in the orifice diameter calculation
0.60 (unitless)
1.41 ft
OK
Storage Volume: SA Waters Parameters
1.5" runoff volume
Pre-development 1-yr, 24-hr runoff volume
Post-development 1-yr, 24-hr runoff volume
Minimum volume required
Volume provided
0.00 ft3
0.00 ft3
0.00 ft3
0.00 ft3
0.00 ft3
OK
Form SW401-Wetland-Rev.3 Parts I and Il. Project Design Summary, Page 1 of 3
Permit Number
(to be provided by DWQ)
Surface Areas of Wetland Zones
Surface Area of Entire Wetland 19,411.00 ft2 OK
Shallow Land 7,602.00 ft2 OK
The shallow land percentage is: 0.39%
Shallow Water 8,151.00 ft2 OK
The shallow water percentage is: 0.42%
Deep Pool
Forebay portion of deep pool (pretreatment) 1,986.00 ft2 OK
The forebay surface area percentage is: 0.10%
Non-forebay portion of deep pool 1,672.00 ftZ OK
The non-forebay deep pool surface area percentage is: 0.09%
Total of wetland zone areas 19,411.00 ft2 OK
Add or subtract the following area from the zones 0.00 ft2
Topographic Zone Elevations
Temporary Pool
Shallow Land (top) 447.00 fmsl
Permanent Pool
Shallow Water (top) 446.00 fmsl
Deep Pool (top) 446.00 fmsl
Most shallow point of deep pool's bottom 443.50 fmsl
Deepest point of deep pool's bottom 443.00 fmsl
Design must meet one of the following two options:
This design meets Option #1,
Y (Y or N)
Deep pool is 6'inches below SLWT, If yes:
SLWT (Seasonally Low Water Table) 444.00 fmsl OK
This design meets Option #2,
Has a clay liner N
If yes:
Depth of topsoil above clay liner N/A in
Topographic Zone Depths
Temporary Pool
Shallow Land 12.00 in OK
Permanent Pool
Shallow Water 0.00 in
Deep Pool (shallowest) 30.00 in OK
Deep Pool (deepest) 36.00 in OK
Planting Plan
Are cattails included in the planting plan? N (Y or N) OK
Number of Plants in planting plan recommended:
Herbacious (Cinch diameter) 588
Shrubs/small trees (1 gallon or larger) 392
Trees (1.5" dbh) 98
Number of Plants in planting plan provided (several species of
each plant type are recommended):
Herbacious (4'inch diameter) Seed Mix OK
Shrubs/small trees (1 gallon or larger) 24 Higher density is recommended.
Trees (2.5" dbh) 7 Higher density is recommended.
Form SW401-Wetland-Rev.3 Parts I and II. Project Design Summary, Page 2 of 3
Permit Number
(to be provided by DWQ)
Additional Information
Can the design volume be contained?
Does volume in excess of the design volume flow evenly
distributed through a vegetated filter?
What is the length of the vegetated filter?
Are calculations for supporting the design volume provided in the
application?
Is BMP sized to handle all runoff from ultimate build-out?
Is the BMP located in a recorded drainage easement with a
recorded access easement to a public Right of Way (ROW)?
The length to width ratio is:
Approximate wetland length
Approximate wetland width
Approximate surface area using length and width provided
Will the wetland be stabilized within 14 days of construction?
Y (Y or N)
Y (Y or N)
30.00 ft
Y (Y or N)
Y (Y or N)
Y (Y or N)
2.74 :1
233.00 ft
85.00 ft
19,805.00 ft2
Y (Y or N)
OK
OK
OK
OK
OK
OK
This approx. surface area is within this number of square
feet of the entire wetland surface area reported above:
OK
Form SW401-Wetland-Rev.3 Parts I and II. Project Design Summary, Page 3 of 3
HAL OWEN & ASSOCIATES, INC.
SOIL & ENVIRONMENTAL SCIENTISTS
P.O. Box 400, 266 Old Coats Road
Lillington, NC 27546-0400
Phone (910) 893-8743 / Fax (910) 893-3594
E-mail: service@halowensoil.com O g- O B C7
Mr. Ron Jackson
Quality Built Homes
PO Box 4065
Pinehurst, NC 28374
6 January 2009
Reference: Savannah's Garden
Soil Scientist Investigation for Stormwater Management
Proposed Constructed Wetland
Dear Mr. Jackson,
A site investigation has been conducted for the above referenced property, located on the
western side of US Hwy 15-501, Moore County, North Carolina. The purpose of this
investigation was to determine the characteristics of the soils at the designated location for the
proposed constructed wetland stormwater management structure. This investigation was
conducted in accordance with the USDA Field Book for Describing and Sampling Soils and
represents my professional opinion as a Licensed Soil Scientist.
The Moore County Soil Survey shows that the site is underlain, by soils of the Vadduse
series (VaD) (copy attached). Soils at this site have dominantly been disturbed and are best
identified as Udorthents, loamy. The natural layering sequence of the soil has been so altered by
earth moving operations that identification of the natural. soil is not "feasible.- This situation
makes traditional soil evaluation more difficult and the' following ,water "table depths are
approximate. The disturbed soils at
the site sometimes contained
significant amounts of organic staining
and redoximorphic features that are
clearly relic of previous conditions but
transition into active zones of
oxidation-reduction. Determining the
boundary that represents the current
water table conditions at the site is a
matter of best professional judgment
augmented with visual monitoring of
the apparent water table that was
conducted.
Three soil profile descriptions
(attached) were collected across the
site and are indicated in Figure 1.
A ?' N '
1 ? 1 %
` ??
%
1
i
9L %
Figure 1. Location of Soil Profile Descriptions
Soil Science Investigations + Wetland Delineations,..Permitting, and Consulting
HAL OWEN & ASSOCIATES, INC.
Soil borings B1, B2 and B3 were described in the area proposed for the location of the
stormwater management structure. The profile descriptions show B 1 and B2 to have 24 and 18
inches of fill material placed over the natural surface at some point in the past. Seasonal high
water tables of 36 and 35 inches indicate that the natural water table prior to the addition of the
fill material ranged from 12 to 18 inches below surface. B3 may have had some topsoil removed
in the past and currently exhibits a seasonal high water table of 20 inches below ground surface.
The apparent water table depths in each boring were higher than the soil morphological
characteristics indicated. This phenomenon was attributed to a recent rainfall coupled with the
effect of the fill and mechanical disturbance at the site. These activities have also likely
damaged or destroyed some soil structure and reduced the overall permeability. Therefore, a
permeability value of 0.1 inches per hour is approximated for this site. Infiltration of rainwater is
dependent on particle-size distribution, organic matter content, structure of the surface horizon,
and soil management practices. The surface soils across the study area have been disturbed and
are now more compacted with significantly less soil structure and infiltrative capacity.
Numerous observations were made.at this property to determine the depth to the apparent
water table in an effort to delineate the wetland boundary in the disturbed soils at the site in
February, 2007. The precipitation patterns were slightly below -normal at that time (see attached
State Climate Office Data), as the drought officially began in March according to the NC
Drought Management Advisory Council (see attachments). That investigation consisted of
digging several deep auger borings and measuring the depth to free water in the borings after
three hours and again after twenty-four hours. The depth to free water was observed to range
from 9 to 33 inches below ground surface in the vicinity of the proposed stormwater wetland.
The location of the 33 inch water table at that time correlates well with the B2 boring showing a
seasonal high water table at 35 inches and an apparent water table at-27 inches in December,
2008. This portion of the site exhibits the highest elevation* and deepest -watet'table depth. The
site quickly becomes wetter as you move away from this area toward the wetland boundary. It
appears that relatively minimal amounts of material will need to be removed to establish wetland
hydrology characteristics in this area. The heavier textured subsoil materials underlying this site
will help to hold water that is directed into the structure.
The seasonal low water table is estimated to range from 30 inches below surface on the
lower end of the area to 60 inches at the highest elevation (including 18 to 24 inches of fill
material). The nearby stream was observed to have significant base flow, even during the worst
of the drought of 2007. Maintaining wetland hydrology throughout the winter and early spring
of a typical year should be accomplishable with proper design.
Soil Science Investigations + Wetland Delineations, Permitting, and Consulting ..
HAL OWEN & ASSOCIATES, INC.
The area proposed for a created wetland stormwater management structures appears well
suited for that purpose and appears to have high potential for success. I appreciate the
opportunity to provide this service and trust that you will feel free to call on me again in the
future. If you have any questions or need additional information, please contact me at your
convenience.
Sincerely,
Hal Owen
Licensed- Soil Scientist
CC: Scott Matthews, Neal Smith Engineering
Soil Science Investigations • Wetland Delineations,.Pennitting, and Consulting
N y
w
C
Q 79' 261"
Ov ?Z
O ?
c?'o m
pzi ;fJ
^*. cp
0 (A
7 CC
c y O O
p ? N
W O
N ?
O g
S V
2
O.
O
O >
N
m
W
O Oi
O X
J
m
m
7
O `
9
Z
A?
O
0,7
O
O 0
O
CO
ON Of
O_. N
C/) ?
C
N
-0 i?
67
N
CD W
? N
O o
(A N
79'24'18"
79' 25 1"
79.24' 18"
U)
O
N
O
O
m
C1
O
C
3
K
Z
O
n
N
O_
3
?4 ?4
SOIL PROFILE DESCRIPTIONS
CLIENT: Ron Jackson DATE EVALUATED: 22 December 2008
PROJECT NAME: Savannahs Garden PROJECT #:
COUNTY: Moore STATE: NC
LOCATION OF SITE: Carthage NC
EVALUATED BY:.. Hal Owen ._.(LSS# 1102) and John Roberts (LSS# 1292)
PROFILE: R1
HORIZON DEPTH (IN) MATRIX MOTTLES TEXTURE STRUCTURE CONSIS-
TENCE BOUNDARY NOTES
0-24 dark loamy fill
24-36 SL 2 M SBK
36-42 SL 2 M SBK
AWT 30 inches SHWT 36 inches SLOPE 5%
ELEVATION DRAINAGE Moderately well PERMEABILITY moderate
VEGETATION
SOIL SERIES
COMMENTS:
PROFILE:. R.2. •:
HORIZON DEP'T'H (IN) MATRIX MOTTLES TEXTURE STRUCTURE' CONSIS-
TENCE BOUNDARY NOTES
048 dark loamy CS fill
18-35 5Y 5/3 LS 2 M GR VFR CS
35-35
5Y 6/6 10YR6/1 c2P
10YR5/6 c2D.
SYR4/8 c2D
SCL
2 M SBK
VFR .
AWT 27 inches SHWT 35 inches SLOPE.' S%
ELEVATION DRAINAGE Moderately well PERMEABILITY moderate
VEGETATION
SOIL SERIES
COMMENTS:
PRnFTT.R- R't
HORIZON DEPTH (IN) MATRIX MOTTLES TEXTURE STRUCTURE CONSIS-
TENCE BOUNDARY NOTES
0-4 i0YR3/I SL I MGR VFR
4-20 l OYR 6/3 10YR7/3 f2F
7.5YR5/8 flP SCL 2 M SBK FR
20-26 1 OYR 518
1 OYR 7/1 VAREIGATED SCL 2 M SBK FI
26-30 IOYR 8/1 IOYR713 cID SCL M VFI
AWT 18 inches SHWT 20 inches SLOPE 5%
ELEVATION DRAINAGE Somewhat poorly PERMEABILITY slow
VEGETATION
SOIL SERIES
COMMENTS:
Page 1 of 2
LEGEND OF ABBREVIATIONS FOR SOIL PROFILE DESCRIPTIONS
TEXTURE MOIST CONSISTENCE
S - Sand VFR -Very Friable
LS - Loamy Sand FR - Friable
SL - Sandy Loam FI - Firm
L - Loam VFI - Very Firm
SCL - Sandy Clay Loam EFI - Extremely Firm
CL - Clay Loam
SiL - Silt Loam
Si - Silt
SiCL- Silt Clay Loam AWT - Apparent Water Table
SC - Sandy Clay SHWT - Seasonal High Water Table
C - Clay
SiC - Silty Clay
O - Organic
BOUNDARY
A -Abrupt S. - Smooth
C -Clear W -Wavy
G -Gradual I - Irregular
D - Diffuse B - Broken
MOTTLES
f - few 1 - fine F - Faint
c _ common 2 - medium D; -Distinct
m - many 3 - coarse P - Prominent
STRUCTURE
1 - very fine w -weak G - Single Grain
2 - f ne m -moderate M - Massive
3 -medium s - strong CR - Crumb
4 -coarse GR - Granular
5 - very coarse SBK - Subangular Blocky
ABK - Angular Blocky
PL - Platy
PR - Prismatic
Page 2 of 2
North Carolina Drought Management Advisory Council
WON=
http://www.ncdrought.org/archive/index.php
Home I Current Conditions I News I About I Contacts I Education I Archives
Select Past Archive:
US Drought Monitor of USDA' Lq?,A
W-Va
NORTH CAROLINA j1? zV? W""t*ft
Drought Monitor History
Links
Counties Under
Current Advisory
D1 - Moderate Drought
Ashe
Cherokee
Clay
Graham
Haywood
Jackson
Macon
Madison
Mitchell
Swain
Yancey
Total: 11
DD - Abnormally Dry
Alleghany
Avery
Buncombe
Burke
Caldwell
Henderson
McDowell
Polk
Rutherford
Transylvania
'Watauga
Wilkes
Total: 12
HOM I C•UCJ.i",II>: Conditions I News I About I Contacts I d r a ion I Archives I Links
I_of 1 ..__ _.
1/5/2009 11:43 AM
Ilrought brtem ally Diry ns
CD DO - AbnvrmaA;* D 0 COUrtY Boundaries C3 Mai" River Basins (View a
® DI -ModersteDrmxjt Hi-Resolution Imaoe
D2 -Severe Drought The U.S. Drought k4x*or focuses on broad Scale emalom. Information
D3 - Extrem Drought provided for North C-Km k reWtlve to the WomnAlm provided from so
D4 - Exceptional Drought otter slates and the North Carolina Drought h 6nagement Advisory
Coma. loaf cord"Ons may vary.
North Carolina Drought Management Advisory Council
s
http: //ww w.nedrought. org/archi ve/index.php
Home I Current Conditions I News I About ( Contacts Education I Archives I Links
Select Past Archive-
oughR tasslfisstions
°? Dl) - Abnormaly Dry
11"
D1 - Moderate Drought
® D2 - Seme Drought
D3 - Extreme Drought
D4 - Exceptional Drought
County Boundaries ? Major River Basins (View Ma
The U.S. OrcugM Mxkor foouses on broad scale dmdlkiam. hformalion
provided for Ndrth Gooor a is relative to the hfmmation provided from all
other states and the North Carolina Dough mmnement Advisory
Council. Local cord iom may vary.
Drought Monitor Histo
Counties Under
Current Advisory
D1 - Moderate Drought
Ashe
Cherokee
Clay
Graham
Haywood
Jackson
Macon
Madison
Mitchell
Swain
Yancey
Total: 11
DO - Abnormally Dry
Alleghany
Avery
Buncombe
Burke
Caldwell
Henderson
McDowell
Polk
Rutherford
Transylvania
Watauga
Wilkes
Total: 12
Home i Current Conditions I News I About I Contacts I Education I Archives I Linlsa
10- 1 1/5/2009 11:43 AM
US Drought Monitor of USDA
NORTH CAROLINA OW ?, ?? f
-qb . .
North Carolina Drought Management Advisory Council
i MSIMi?1111ii
htq)://www.ncdrought.org(archive/index.pbp
Home Current Conditions News About I Contacts I Education I Archives I Links
Select Past Archive: '
Allow
US Drought Monitor of USDA
NORTH CAROLINA 11W C Iff
Drought Monitor Historv
1 oft
Counties Under
Current Advisory
D1 - Moderate Drought
Alleghany
Ashe
Avery
Buncombe
Burke
Caldwell
Cherokee
Clay
Graham
Haywood
Henderson
Jackson
Macon
Madison
McDowell
Mitchell
Swain
Transylvania
Watauga
'Yancey
Total: 20
DO - Abnormally Dry
Alamance
Alexander
Anson
Beaufort
Bertie
Bladen
Brunswick
Cabarrus
Camden
Carteret
Caswell
Catawba
Chatham
Chowan
Cleveland
Columbus
Craven
Cumberland
Currituck
Dare
Davidson
Davie
Duplin
Durham
Edgecombe
Forsyth
Franklin
Gaston
Gates
1/5/2009 1:26 PM
Drou Cbesiftc?ione ? County Bmrdarlw ? Nklor Diver Bashi (View a
DO - Abnormally Dry
D1 - Moderate Drought The U.S. Drought hdnkw foouses on broad scale candltWa. Inramalion
¦ 02 -Severe Or peed for North Carollm is relative to the information provided from all
other states and the North Carolina Drought Wnayement Advisory
¦ D3 -Extreme DM4 ttt Council. Local owd Ums may vary.
¦ D4 - Exce0lonal Drought
0
EROSION CONTROL,
STORMWATER WETLANDS
AND
DRAINAGE
CALCULATIONS
FOR
SAVANNAH'S GARDEN SUBDIVISION
FOR
QUALITY BUILT HOMES
PINEHURST, NORTH CAROLINA
•
JANUARY 6, 2009
0
NEAP SMi'm ENGINEERING, INC. Project No. 0522502
Q F9@9\vlffq
JAN 9 2009
DENR - WATER QIJALII"Y
WETLANDS AND STQRPAWATER BRANCH
•
•
DRAWDOWN CALCULATION SPREADSHEET
Project Name: Savannah's Garden Stormwatcr Wetlands
Project Location: Carthage, North Carolina
NSE Project Number: 522502
Restrictors are required to regulate the discharge of storm water to the allowable discharge rate established
for the site. Restrictors are typically in the form of an orifice. The outlet pipe however should be checked as
a metering line to verify that its capacity is not restricting the discharge.
ORIFICE
The circular in-line restrictor is sized based on the orifice formula.
STORAGE
The volume to drawdown in 2-5 days.
V= 19,411 CF
a = Qo/[ 0.62 (64.4(h))'/
a = area of orifice (sq. ft.)
Q2 = Maximum Allowable Outflow (cfs)
Q5 = Minimum Allowable Outflow (cfs)
h = head differential from center of orifice to hydraulic grade line of detention facility at
maximum capacity (ft).
CALCULATION
Q2 = 0.11 ' cfs
h = 1.41 ft.
a = 0.02 sq. ft.
Orifice Dia. = 0.16 ft.
Orifice Dia. = 1.9 in.
Drawdown Calculation
FORMULA
Q=CD*A* 2*g*H
Q=Flow based on orifice pipe diameter
A= area of pipe (sq. ft)
CD = Coefficient of Discharge
g = Acceleration of Gravity (32.2 ft/sec^2)
H = Driving head(ft) above centroid of orifice
CALCULATION
Pipe Dia. = 1.5 in.
Pipe Dia. = 0.125 ft.
A = 0.012 sq. ft.
CD = 0.600
g = 32.200 ft/sec^2
H = 1.410 ft
Q= 0.07 cfs
Drawdown
Time= 3.202 Days
OK
CALCULATION
Q5 = 0.04 cfs
h = 1.41 ft.
a = 0.01 sq. ft.
Orifice D 0.10 ft.
Orifice D 1.2 in.
Is Flow Between Maximum and Minimum
r?
LJ
•
NSE Job Number: 522502
Date: 1/6/2009
Name: BCW
Anti-Flotation Design S tormwater Wetlands
FLOTATION OF RISER
RISER DIMENSIONS
Inside Dimensions dia. = 1.5 feet
ELEV. @ TOP OF RISER = 447.60
ELEV. @ BOT. OF RISER = 446.00
H = 1.60 ft
AREA OF RISER - 1.8 SF
VOLUME OF RISER = 2.8 Cubic Feet
DIAMETER OF BARREL = 12 inch
AREA OF BARREL = 0.8 SF
EXPOSED LENGTH = 2.00 ft
VOLUME OF BARREL = 1.6 Cubic Feet
WEIGHT OF WATER DISPLACED = 274.45 lb
FACTOR OF SAFETY (10%) 301.89 lb
VOLUME OF CONCRETE ANCHOR = 3.4 Cubic Feet
WEIGHT OF OUTLET STRUCTURE
Weight of Riser 28.94 lb
Weight of Barrel 19.14 lb
Total Weight 48 Ib
ANIT-FLOTATION WEIGHT REQUIRED = 254 lb
ANIT-FLOTATION VOLUME REQUIRED = 2.9 Cubic Feet
ANTI-FLOTATION PAD RE QUIRED
DEPTH = 1.00 ft
WIDTH = 2.00 ft
LENGTH = 2.00 ft
VOLUME PROVIDED = 4.0 Cubic Feet
'
'
'
- S02.0
Lx3.0
Wx1
Dp Concrete Pad Required
•
x
a
`
z
\
_
I
}
Q
? U O LL
U Z W
_
d
0
'm
10
,6
O
O O
m
O ?: O
W
O I m'Im
Q O
01,0 O
M
0 O
M
0 O
M
10
I m
Q
O
I
T
+ N
N
IO
i O
M
O
I
I-
I m
'Q
I0 N
N
i0 N
A
i 0
i
j N
n
i0 IG0p
•Qltn
0'O Im
Q
IO
I p
?N
10 m
'Q
'D m N
Q. o
O 0 l
:?
10 Ip
n
O
0
0
a
6
s
6
m
0
?
1 O
I0
j O 1
1 O
iO
'
IV
0
N
10
Z m
N
N W z
° O
N
j U
0
O a'
2 LL
U
W Z
Z ~ m T?
- Z c
F? rn
N
m rn
N
m m
N
ad .m
'N
W m
N
lw m
N
O1 m m
N N
m m m
I N
lm ;m
I N
O) m
IN
OD m
IN
m Im
' mN m
N
m m
N
Im m
N
m m
N
m m
N
m lm'm
'N;, N
m'm 1 m
IN
m l0,
N
OD IN
m IN'N
W 0 N
m N
m N
lm N
m N
0 N
m N
m N
m IN
0 N
0 N
0 N
W
o a
U ¢ cr O ? U
l
U
W Z
?s?Z
F LL
8
N
8
h
8
8
8
5
6
8
u) S
8
I N
5
6
8
N
S
N
I
8
N
I
'8
IN
I
I
8
N
8
N •
i
°
N
°
N
l
S8
Y) N ??
I
I
8
' N
8
N
8
i N
I
I
8
0
8
U]
I
18
N
8
0
8
N
8
?0
8
N
8
N
8
h
8
N
8
N
8
N
8
.1
8
h
j
O I I I i
a
a r ?.
°
GO
o
0
N
0
0
1
lm
i0
0
m
0
A
m
0
.?
?
N
0
N
¢?
8
c
n
o
o
Q
l.-
lo
j I
8
0
?
0
g
0
gj
o V
n
N t?!
I??
'1
I?
Im
1 l'? I
8
to
?
8
0 I
IA
O
0
'
Q
0
E
E
0
S
0
N
Ill
0
8
c
9
o
8
0
Q
7
0
N
M
0
l
Q
0
8
0
m
0
0
1 1
R
t0
w
??
O O z
W
0
o
a N
)
N
N
O
m
?
m m
Y
U
?
U z W W 2
-
J
_
8
S
8
S
N
8
8 _
18
NIo
8
N
8
N
8
?
8
B
IN
S
N
8
N
8
h
8
Y)
8
N
8
IN N
II8
h
8
?
8
8
N
8
0
I
8
0
8
0
8
N
8
N
8
N
8
luj
8
(j
8
N
8
N
8
N
8
N
8
N
J m _
a Q
F- W U
0
a
?p
N
0
M
A
0
O
m
0
m
m
0
0
Q
?
m
m
A
m
n
m
n
m
A
m
I
m
Q
0
N
N
m
M
m
Q
A
N
?
'm
m
m
0
Q
N
m
O
'r
-
T
Y
N
lm
Q
N
m
N
n
A
n
A
n
m
M
N
M
O
tp
O
M
Q
m
m
O
n
n
Q ? I C O O O O O - N fV N
? ? •N N N N 6 6 6 6 N N
W a
J= LL
U m m N
N N
? m
Q N
?[1 N
N
IS
8
8
m CO
Q
' N
N N
YI m
0 m
- Q
? 0
n M
N
N m
A A
CD M
Q
? m
fV N
M
8 m
m m
r m N
?f m m Q fD
Z
N
.-
O
N
O
•0
0
0
0
0
1 O
-
0
0
N
W
0
N
.-
tD
'C
.-
V
O
O
Y
O N t M
O
O O N
LL
W O LL
J
Z W
? O 0
pp
i[1
0
g
aD
0
pp
m
0
0
o
0
6
O
!!00
0
m
Q
6
N
n
6
O
M
0
N
1,
0
0
6
m
Q
0
N
n
0
O
M
0
O
Q
0
N
n
0
N
n i
0
N
n
0
O
Q
O
Ip
I W
O
?
m
Q
C
N
0
I
m
Q
0
I
m
Q
N
A
9
W
Q
0
0
O
M
0
m
Q
m
Q
0
m
Q
m
Q
m
Q 1
00
R' j 7 7 0 C 6 0 6 0 0 0 01
- -
N - - - - - - - - - - - - -
W O
Q
0 p
m
0 p
O+
0 p
m
0 p
N
0 0
0 -M
0
A
0 p
O
0 O
r
6 b
0 O
M
0 O
A p
8
I O
M O'.
A Oi
n O
r 01
M p
8 1 0
M 0
Q O
M 0
M 01
A p
8 p
8 p
&
R p
O 0
M 8
Hl
p
p
8
OM
p
8
op
M
po
Q?
-
I 6 6 I
I d l
I o 0 0 6 C D o 0 0 0 0 0 . 0 0 6 O o 0 0 6 C
J
W
~ W U
J ¢Q
? Q a
?/
0
0
0
O
00
Q
0
O
6
M
0
S
6
S
o
S
S
6
a
O
O
X
m
O
A
N
N - - -
On -- - -
NI -
N - -
0 -
0 -
8 - - -
m -
N - - -
M
O -
N
O -
N
M -
o
M
O
n
N
c 0 6 0 0 1 0 0 0 0 ? cs
O 01 0 B O 6
G -i 0 O 0 0 0 0 .
N6
Q
m
t ? U
a ° W
W
f
H m
r
O
Z
~
J
¢
I
a? QQ
Q
I
¢•
¢
¢
¢
al
¢
¢
I
¢
m
a
¢
,
m
NI
m
Mi
m
Nm
m m
m
AI
m
m
m
N
IW
w
N
W
m
LY
N;
IL'
M
Q
w
n
mo
W
m
W
O
W
NI
a
z
z
a
l
a
a
a
a
a
a
a
¢
¢
¢
I
I
a
I
m
m
m
m
I
,
m
l
'w
l
w
j
w
T
w w
w
w
w
w
U
r m
W C z
O l l ?
o> ?p
UU¢r
O 1
I
I
j
i
aU) oU N
I I I
M ? N
O N
O L
0
y
¢
¢
a
¢
a
¢
N
¢ ¢'
I
¢ ?
S
¢
?
¢ I
Q
¢I
I
¢
'
¢
+ i i
I
'm
!
M
m
m SIN
mlm mlm
it )
?
m
m
?
1
N N
m SID
I i
I i l
I
Nlo
W?W
::
W W
_
W
_
W I
i
Q
WI
I
W
'
WI
m
W
O
W
L
W
I
I
UI
M
U
...
Q
LL
¢
N
Q.
¢'
NI
¢
m
¢
A•
¢'
m1 ?1
¢,
¢
_N
¢
_M
¢
¢
I
M
¢
m
a
Oil
_
Q
j i
m
N
m ,
MIN ml?
m: ml ml m
IA
ml I
ml I?
m
I
i
N
WW
Nl m
W
WI
'I
W
i
?
W
M
W
Q
W
I
A
W
m
W
m
W
O
W
I
I
I
I
I
"I
N
"I
0
1]
_
I xl
`
_
\I
_
\
I ??>j
V W
~N a W `.
1 O
? f
m
' m
P ,
m
O ,
'r
Q I
II
n
Q I
IIW.
tO
P I
v
tD
P
Im
'tO
Q I
i
l m
P
ln
m
'P
n
m
P j
^
. m
!Q l
l ll
N
P l
I I l
'om
.?
'P
?om,
P II
°n
O
I Y
ip
O
P
m
IL
iP
0
b
P
p
N
P i
I
!Y?
;P I I
D
P %
m
O
O
Y I
l
, I I
co
P I
m
N
8
P
N
P ?
C
IO
M
Q
N
Q
0
N
p
u4i
,P
n
N
u4i
P ;
m
n
n
N
iP
Ip
l m
tO
N
P I
'' I
O
P
CO
ttOO
P
O
Q
(p
??tppp
P
?
m
n
N
V
..-
N
n
N
V
In
m
'N
N
P I
IN
m
N
N
IP I
2
CL
Z
O
S
L _
2> r^
W
3
?
•1
O
V
?
O
I P
' M
'
m
N
to
I.-
p
?eD
'
r
mV
O
?
?
p
Of
M
I
?
N
'
'
m
eh
Oi
O
'
N
N
m
M
m
m
n
Cpp
Cn
i
n
n
0
C7 y
J
N W 2
W O
o a U _
m
)
W
m
O
U
W
¢
W
S
P
O U
w Z LL
O
J IN
n
P
m
m
Q
{p
`cg
P
O
m
Q
Oi
?[1
P
Oi
N
P
n
h
Q
n
N
P
n
Uf
P
Cp
N
. Q
a?
IN
:. Q
aD
m
Q
.
Cli
IN
P
Oi
N
IP
'
'
- IP
M
Y
aD
O
Y
Y
Y
eh
Q
m
IC
1
m
IO
N
?p
a
C?
Y
N
O
m
Q
P
m
Y
C`
Q
P
th
Y
M
R
Q
O
Y
j
pN
Q
0
O
I
w
p,
C
? M
P
?
n
Q
!(?p
tD
P h
c?p
tO
P r
?
t00
' N
N
Q N
N
P
I
?+.
N
Q 10
;
h
Q m
N
Q N
?p
N
I P n
f00
Q
i N
! f00
P
i I?
N
Q ? N
yy
I m
P I O
pp
tD
P II ?
N
P I ?
'i N
I P IC?
' N
I P :m
?n
I' N
IP
i
m
m
Q
I
?n
N
P M
prn
f0
P
I m
n
4
P
?p
Q
P
NP m
n
P O
n
O
'P N
rn
m
?
I m
pm
N
P
P
n
m P m
(c
{{pp
P
rn
QV
?i
N
:P
I
I n
pm
PN '
n
' h
Q I
ww
f
N
; O
N
8
M
S
N o
N n
O n
O lm
;N P
Imo ,c
NI
O ,
NI v>
O m
O ?n
IO lm
IP M
O n
O y
t+i pp??
0 m
? I
$ n
P
c n
a
O pp??
i0
F- O d lO O O d d 0 0 0 0 O 0 0 O d 6 1 6 O O O O O O O 0 0 I
0 0 6 6 d N
0 6
0
, O
O
C
_
I
I
I
I
I
i
1
',
I I
I
I
1
Of
O Z
H
w
a
N
j
'
C C14
0
m
m m
O
W
1
ow
Z (J LL
Z
J m
M m
N v
P C
.- n
N n
Q N
? m
, N N
N O
m 'r'
ry m
C'1 m
N O
n n
N P
?O m
N
tN`J m
N N
t+l n
N
[?V O
t?f n
N
[V m
N m
N O
M I Q
N n
N n
N
O M
Q ,(+1
P n
N N
t")
a m m m n I '
LL V
0
0
P
l 0
P O
m N
n N
n
i m
m m
m N
P N
M to
N O
mI m
m m
m N
n M
II
O N
m
1 Q
m n
? m
to C
1
? e-
? N
m m
o m
m N
n
? m
a m
m N
H P
IS
- - - - - - - - - - - - - -
Q D LL
a v U
n YY m t'I l+)
m n
m
N V? N
(?V m
- cNV t0
tNV m N
Gi N
vi m
tai N
n m
Oi tD
gyn., m
?vOj N
N n
Ih m
m O
N m
n { np
cV P
tN+l m Q
m m
C? m
N/ Cl!
N N
N M.
m .-
Oi
CCU477 I I I I
Q Z N N N ?C1 N m N N N N N
I N
? ' ' UI N
? VI N ^ m N ? N N N N ' P
N Q:
N P
N P
N SCI N N N ' m I ?f] h
p
z ?N _Z
FS.. N ... o
'O ?
m rn n
' aoD. ?i m n
N, o
CG aoDl
m m
Ito
IN gi
Y b
Vi vni
d l
Oi
CG
N m
O) m
m
O
Di vmi
N ? nmi'
N ?
N m
N rn'
N ?
O M
N
h
O
1?
CV N
aD a
V7
O
• U
•
L
E
W
j
p
W
U d
J
m m
N
o
0 m
'
0 m
N
o'
0
N
h
0,
o
0 m
0 M
'-
o'
0 .-
M
8
0 N
N
0'
0 p
8
o
0
pp
0
0
0
m
n
0
0 I
N
n
01
oI
N
n
8
o
n P O?
M N
l7 m
IS o 0 0
o 0 0 01
I
nl'
mI
oj
0;
?
S
0
I
N
Q
o
0
i
o 0
Q
N
g'
0
'
pp
N
o
0
r
0
M
o
0
O
0
0
0
0
N
8
0
p
M
c
0
0
0
vnj
8
0
?Q
$
3
0
S
0
0
j
o
0
_
?
yypp;;
Sl
0i
o
6
c°i o
v (A
cw7
00 V
8
81
m!
=
S
I
81
8,
8
O
S
8
00
?8
I
81
8 ?
1
10 o
B
8?
8?
8
8
8?
8
WI
C
8
8
I
8
8
?
8
8
S
S
8
W P Q to r.
N d o . o o oi o c o d o o
C o o 0
Io 61 d, ?? o o o? d I Io I d o ad d d o d d d d °o
d d t co 0
z?D =d ° z I I:
W C
• m
O>
m
O
a L
C
O Q
¢ LL
Iv1
N
N ?p
l'1
oi ?p
M
m
amD'
m
0
of
?
0
O
CND
CND
m
CND.
I'm
I
O
N
O
0 81
NmN Pi
2I
m!
0
ol
I
O
NI
m
'?
i
n
pl
p
S
m
N
N
N
to
fD
p
tO
o
m
n
m
M
nl
'
PI
O
N
O O O
N N I
I
I' 'I
? ? V I I
O O
f fy
¢ PI
a Nm nj
¢'',¢ a;
j
I mi ?i?
a
a¢ I
M
a! 'I l
?
I
N'
P N Q' O NI M:N m I'
QI 'm m.m ml
al¢ ¢ a j m m '
mIN
mlm ',.m m
N N.
iw w;w
SIN I
WIW w I
I
,
P
w
0I
w
Imim
W w
O
w
N
w
IN,IN
U U
If
I
I? -
:
i I I lI I I
?
?
I
I
I
??
?
I
?
I
I I
`
?
LL
_
¢I
? I
ff??
¢
QI¢ ¢
i
I QiI I
a
I I
I
al
I
'P
I
I
II
? " i
Q m O NMN m?
¢la a ¢I m m m mlm ml
I II I I I V I I I I i
I
nm IpI
mim Im I,
II
'NI N
W W WI
! I I I
I
m•-INI
WIW W
? I
I
'
i
L I I
P'
I I
I I I
nm
'w WI
I I
m
wI
i
O
W
I
I
^I Ni
IU U
J
•
`
I
I _ T o
4
N
N
17M
1'
1 Q
tM
n
e7
1+1
fM
n
O
Q
I
: G
O
I
n
IA
0
o
L
N
l
0
O
i
W
_ \ `
O ?
a W'
Z
Lu (n
Z
07
O
O
W
_
V R
Z
~ Z
O W F
0_
V OJ
N_
8
n
N
5
Ip
. 011
? 8
? 0
O
01
0
.-
m
8
Q
N
8
n
N
0
n
IN
8 1
A
N
8
A
N
8
CO
S
i 0
1pp
0
pp?
8
N
p
o
N
O
A
S
17
I A
8
1
N
S
O
I N
' S
j
m
I O
01
N
8
S
8
pp
N
8
r?i
a0
l7
N
e7
N
m
((pp
$
T
N
1^
N
(n W Z
W Q O
W
W
1-
W
W
Z
O
LL In
0
0
0
0
0
0
O
'O
G
O
O
O
1
O
O
?
CO
IO
1O
O
0
O
0
0
0
0
0
O
0
0
0
0
0
0
0
0
0
O
S
6
O
O s
'0
0 O
0 S
0 0
0 10
0
O a 0 ¢ ¢ O U 1 1 1 1 i
_
zco
Ip 8
0 0
0 8
0 8
0 8
0 18
6 8
0 18
0 8
0 !8
0 00
0 j 8
0 S
0 8
0 8
0 8
o ,8
o 8
o 8
c 8
o 8 8
0 8 8 '8 8 8 8 8
8
8
8
8
8
8
8
8
.
-
' I 10 ,0 0 0
I 0 0 0 0 0 0 0 0 0 0 0 0
N
0
N 11 I
Y W
O o
0
I
W
0
=
O
O
N
m
O
A
1 N
O
I
18
,?
N
O
_:
O)
6
n
Q
6
N
6
01
0
n
P1
0
A
6
N
IO
O
S
i0
18
O
!
l7
10
0
N
0
n
17
0
'ao
O
M
N
7
01
N
0
??18
?O
17
A
O
O
t0
O
t7
O
CD
O
N
A
Q
O
Q
l4i
N
B
A
lau
N
1D
N
O
8
0
8
O
0
C
1p
0
C
'
O
I
1A
z
m rn
O
0
x°
8
8
8
8
18
8
8
18
8
8
00
8 1
8
8
18
8
8
8
!8 !
8
IB
S
1
8
8
8
8
8
0
8
8
8
j
'
8
8
8
8
1
O
U
O
W
Z
0
0
0
0
0
0
O
O
O
0
0
O
O
, G
O
O
OO
s
OO
O
0
0
O .
0
0 1
0
0 0
0
O
D
o
O .
O
0
0 8
O 8
O
i0
W W N
N Y
W m
0 o
a
o
m
m
UZ
O I
?
!
!
n N J _
0 0 0 1
W OW S 2 O
0
0
0 N O O' O O O O ' 8 8 0 0 0 t7
! p
N
N N
O $
' b OI
O M
r O
r m
M 01
M . O?
O OO
m
N
S
S
O
M
O
CD
O p
0
0
0
0
0
0
0
10
1
0
0
0
0
0
0
0
0
?
6
0
10
0
0
0
0
0
0
0
0
0
0
0
0
0
1 Q
0 Q
0
r - r
0
=
N
O
61
M'
O
0
0:,1
7
0
N
7
0
N N
0
-
0
0 N
0
N 0
0
0 N
0
N O
'
0
N
O
0
'
O
O
1
1
0
S
0
O
0
01
0
0 N
0 I
N n
O
Q
C
?
N'
?I
O
'
O
0
a7
O
0
O
8
0
O
0
0
NN
6
N
6
N
6 1p
8
C
(
ON
O
8
O
8
C
0
G
NO
O
107
0
M
0
I ,
?p1 0 M n NI p {p N ?p Q CO 1 -
! 1 1
$
O
0
n
0
Q
0
t0
- -
N
0
l.
0
1'11
0
O
0
O
0
N
6
N
6 17
O
O
8
O
8
O N
O.
O 0)
O
Ol t7
!7
0 t7
Q
< 0
N
0 Q
N
0
1
1 f7
0
0 {p
f0
c; N
M
O, (O
O {{pp
IO 17
N
O W
0
.-
N
O
N
N
O r
N
O p
0
.-
O
0
Q
0
n
O
O
N
A
O
0
a: LL 8
0 8 m 8 8
6 8 8
0 0 8
0 8
0 8
0 81
0I 8
0 8 j 8
0 81
0 8
0 " 8
0 8
0 1 8
0 8
0 1 8 8
0 8
0 1
m ?
a 81
0 8
0 . 8
0 8
01 8
0 8
0
W
Q Q
0
0
17
0
N
0
N
0
0
Q
17>
0
l Oy
111
O
N
O
O
N
O
O
O
O
O
O
O
O
O
N
17
O
!7
0
O
O
O
O
O
t7
O
17
O
O
M
O ? S2
W
Z a z
U
W
W
C
j
Z
O
Q
N
Q3
L'
W Q
Q a W
Qr a'
Q a Q .?
N
n
N
N
-
NI
n,
N'
N
-
N
n
N'
N
N
n
N
N
N
n
ry
(V
n
f0
A
r
!D
Q
?
Cl
N
Q
l7
f0
Q
l7
!D
?I
M
OI
?
M
!
N
A
N
N
r
1
l
1
N
A
N
N
N
A
N
.
N
AI
N
N
NI
AI
N
NI
N'
A'
N
N
'
n,
Ip,
n:
N
Q
?
10
^
Nl
N
A
Ni
NI
NI
n
fNy
N'
'
N
A
N
N
n
N
N
A
N 1
m
N
ID,
N
I
1
N
A
N
N
n
N
N
A
N
N
A
N
N
A
N
'
n
I
N
n
V
tNI
N
n
N
i , i I ?i f7 ?? M [M t"> M
?
I
l7 N M
O N N
G
f?I O
N
I I I
N n mom' "117 1
I
I
QN I I
1 I , i 'I I', I !
I I I I' ''. I III I I I
pl IN ,
?
'
1
!
I
Q Q I
Q Q Q Q
<< Q I?
QIQ ,
N l7 N'O)
CO NI 1A IiW'
m 6l m G1 m 6) m m
Q Q
'
m W Nl 'I?
I
W QIN
W
W m
W 0)
W p N
W N m1
11 11
C Q I
'
l
i
I
I I w W
W
W i
- i
H4 S W U of
O
LL qttyy
QI Q'
Q IN
Q QiQ QI l
Q Q
"M Mi
Q Q Q?
m.0 E- Nlc7'IN OI A 0 PPI S
I
Q
I
m
Q1 O7 0]
m ml ml
N
Ni10 N
'
M,Q
n
W I
M
0 I
!N
I Q
I
l
,
I p] i
W W W; W'I W W
i W W WI W W` W UU
I 1 i I i 1
C
?
?
?
l
?
I
l
I ?
I
I
I
I
l
I
, I i
? ?I
?
I
! I
I !I
I Ili
IIII?
! j?
I
I -?
it ? I?III
? I
! !
I I
" I I I
,-,-;Iill I;?I' I ;
! ? I
I' I 'I
, I II
l I III
?
i
' ji'
I!
I I
, i
V
?I
I
I l
I
I
i
'
I ?I
II
l
! 'I
l
I I
I
I j
? 1
I
I
I
I I '
I
I
i
I
!
?
I II
I
I i
!
I
I
?
I
1
'' II
i
?I
'III
I I I 1
;I ? I
j I, ?
I
j ,II
I I
l
l I
?
j I
1
1
i
1
!
I
?
i
I I
?I
Ii I
I
I?!!I? ?
?
I I ,
I ??
I
I
I? ?
i
I
I
I
?
? I
US Xl,i
-I ,l_I
a
z ¢ z
0 o
j N 5 ,
to W Zj
0 Ux w
Uir
a ?0
0
c
a
a
m o ?
o %r77
z q O V w f
c
p r z U
a
r v N t Z n -
9
a a Q LL
0
C
Z .O
m W
M 0 n
O E C
u o
Y LL
Z
.
t L C
w o z + > Sa
ax O
W <®°
0 Y
m F p 7° y a o c
5 i V
w
z
Of r N
O 0 K
W
0 N L O m
U Z f
W
`
O
U
N
3 y
W? z
? 7 Z W
g E
W tNp Z Z p ay
O
N > V x W fN
w a a o w
0. O m m U Z
Z !, j O !
W
f Y
O Y
O Y
O Y
O Y
O Y
O Y
O Y
O Y
O Y
I0 Y
0 Y
O IY
0 Y
0 Y
0 Y!Y
00 Y
0 Y
0 IY
0
l Y
0 Y
0 Y
IO
! Y
0 Y
0 Y
0 Y
0 Y
0 Y
0 Y
0 Y'
0 Y
0 Y
0 Y
0 Y
0 J
W
O
0 ( 0
'
Q
W W
W O t0
P
M N
P .-
N
M
O
M M
Q
M N
0
P N
a7
M n
Q
IV
m
N N
0
N N
O
M 0)
N
O M
0
M
Q
V N
O
V N
N O
N) C
O
t7 m
N m
N
N
m
N
Vf
N
17
O)
of
N
V
O
O
m
O
N
O
-
r
O
0
O
n
m
O
V
N
ry
7
r
O
m
O
LL m I I
Z
00
3F?
r
W
r
W
r
W
r
W
r
W
r
W
r
W
r
w
r
W
r
r
r
r
r
r
W
r
r
'
r
w
r
r
r
r
r
ui
r
r
W
r
r
W
-
r
W
r
r
r
r
w
r
O p r
LL Z O
J
Z
J
Z
J
Z
J
Z
J
2
J
2
J
Z J
r
7
J
Z W
J
Z W
J
2 W
J
Z W
J
Z W
J
Z J
r
7 W
J
2
- W
J
Z
- W
J
Z
- J
r
7 W
J
Z
- W
J
Z
_ W
J
Z
- W
J
Z
- J
r
7 W
J
Z
- J
r
7 W
J
Z_ J
r
7 W
J
Z J
r
7 W
J
Z J
r
7 W
J
2 W
J
2 W
J
2 J
r
7 W
J
Z
O U O O O O O O - 0 -1 O - - - O -
W o _
W
7
Mi
n
n
m
Q
On
0 ?p
81
?
?
G
r
tpp
N
N {p
O
vOi
NcO
N
mI
N i
<V<
10 p
kQ
? 9 p
1p
I
0
Ci
(OV'
N I
I
Q
OI
'i
L
M I
0).0.
'
!
0.
O
r
pNp
?
m
K
M.
?
N
m
O
O
N.
O
?
rD
Q
t0
ml p
0
.
m
r
n ?p 1
Dp 04
N 0 0
N
= P Q Q P P Q !Q Q P P Q P Q Q Q, P, 0! O O {
p
QI OI a Y Q Ip
Q Y QI V O O P e O p
P O Y C ?p
V Y O N
P I
P SO
P' v Q
> _ i
2
!
?
V w r
10 J r
> M
?
W 01
r
m
O M
Q
O O
M f0
+l Q 01
Yf I? N
.- (0
O Of
A 01
m Q
Q 1?
a0 0>
M Q
N
N pp'I? M (O
? 101 m
Q
5 M
O ?,
O
' 1?
N (O
m ?; P i(1
O N j N
m !-
Op M
O N
? (0
!? N
a? M
M p
?D N
M O
O1 O
N
C
W
> Z Z
r O
z
N
Q
N
Q
^
Q
P t
P? ? O
O I0
Q Q 01
N
P O:
N
P m
h
P
N
Q
I O
f`
P O
O
P
Q
I
P Q
N t
Y1
O O p
P P Q,P P
Q
10
Qj P
?: fD
QP N
Q ? Y N,'
tD c0 N
Q P Q 10
??ll1l
Q 1+1
tl1
P t?l
N
Q
Q
P N
?p
Q tN0
Q N
P
Q ?,
Q m
P
t J -
_
C
97
W
U
L
O u//
J 0
~
r rz ri
7
00
9
h
P
Ni
?
Q
b
D7
10
P
O
N
(p
Q 1pp
N
N
10
Q
O Pi
P
01
LO
N
P
"
0
N
Q
O
6
N
Q
p
N
m
N
Q
4
Q
!
100
W
V
1
n
O
0
P
N
O'
pi
VI
N
Q
O I
N'N,w V"
Q'. {Np 01
P
Q
V
tNV.
M
P
t0 m
Q W
- YP N
P
l
^
01
?(1
P
M N N
W A
P!Q!
' !
?
QI
gyp!
Q
p1
O
0
N
V
O
t?
Y
Q
N
O
f00
rNp
P
W!
N I
YI
v
Q
NQ
p
NQ
I ((pp
t0f
I QQ
01
N
Q
Z N
L Z
Z
= >
r W I 1 t (
I
i +
W C O l0 W F-
J ?1 0 M ?p
Oi p
N n'N. {p
O r mi n p
ID , ? N VI t
DI NIit^i
O {p
tO NISI ' p
O NI m O O? oN')' ! n? 0 tp0 01 dp
(?l 0pi N?1 0
(0
0 >
d' W L
C
N
Y F
-
7 N ...
0 m
P ni
Qi m
Q 10
Q 1?p
P m?-
PIQ N
Q G
p
N
P Nl
Q,i m
Q
1
1001.
Q
t00
P,
t00
PI
{N{pp
P Q
y
t0'1?pI ?IN
Q'I I?IP P
YN'?I
Q, m
I!
IIi QI,
I
N
Q'
j
N
?, Pi
I
P,,
Ni
P
01
1p
i/1
Q
?
Q
Np
Q
l
PI
p
tn
P
Mji
Q
I
'
i
QI
N
Q
w t4 J U Z
I '
O N N
0 I
tryy
Q N110 C-IN
al. a?a
a,a ala (
IiI I11 ! !
N M: Q 0 NI 1' N_M'
P IN Mi 01 m'N IN r.
I Im m m m ml M16 wl
W ,
l m m? m ? W W WIwW
a a a
al ai al a I !
PIN
IWW
m
Wi
L
W
I III
Ni N-M
p
W W UU
i I
i
i
I
?
C p ! I I I i I I I I I
?
0
U. 'P N'tp 'p?
a?lla a aa;a
I 'I ?. MI'PI 'M 01 OI N':1M N 0.`- r.mi I Q?
a a m mlm m m m, m; mll wW w w,?
a a<j¢ ai j l l w w
m
I I ? I ?I I I I ? ' I III I
I I, ? 'I I I !, li I I I ! I I w w
I
i ? j
? I
W
I m
wl
I Of?1p I,N
W?wl U'IUII
? I I!' I
I' I j j
0
Riprap Velocity Dissipator Pad No. 3
Savannah's Garden
Carthage, NC
NSE Job#0522502
25 -Year Design Storm
New York DOT Method
BACKGROUND: Use the E&S Control Planning & Design Manual, Section 8.06.
REFERENCE: (NCDEHNR, June, 2006)
Velocity FES C-3
15" HDPE @ 0.96%
V = 7.4 feet per second
Zone 2
Size Length
6 x Dia. =7.50' Long
Width @ Outlet
3 x Dia. = 3.75' Wide
Width downstream
3 x Dia. x 1.25 = 4.68' Wide
Solution Use 6.0' Wd X 12.0' L X 8.0' Wd X 18" D
Class "B" Ri ra pad
0
Riprap Velocity Dissipator Pad No. 4
Savannah's Garden
Carthage, NC
NSE Job#0522502
25 -Year Design Storm
New York DOT Method
BACKGROUND: Use the E&S Control Planning & Design Manual, Section 8.06.
REFERENCE: (NCDEHNR, June, 2006)
Velocity FES E-12
24" HDPE @ 1.00%
V = 7.2 feet per second
Zone 2
Size Length
6 x Dia. =12.0' Long
Width @ Outlet
3 x Dia. = 6.00' Wide
Width downstream
3 x Dia. x 1.25 = 7.50' Wide
Solution Use 6.0' Wd X 12.0' L X 8.0' Wd X 18" Dp
Class "B" Ripra pad
0
0
Channel No.1
Savannah's Garden
Carthage, NC
NSE Job #0522502
Design Storm
25 Year
OBJECTIVE: Design a
and Temporary Liner for erosion control
SOLUTION - Qp: Use the calculated Time of Concentration and the Rational Method to determine
the peak inflow from the design storm.
CHANNEL
INPUT OUTPUT
L = N/A ft. Surface Mannings Bare Earth
Hv = N/A ft. n= 0.02
Tc = 5.00 minutes
A= N/A acres I= 8.29 in./hr.
C= N/A Qp = 41.71 cfs
Slope 0.014 ft/ft from topo
z 3 ft/ft side slope
B 0 ft bottom width
D 2 ft
CHECK FOR BARE SOIL
n for soil 0.02 Table 8.05b or Table 8.05f
V all 2.5 Table 8.05d
V = 14.12 Liner Require
DESIGN LINER
Get Liner Type from 8.05f (n) for liner 0.068 Rock Ri ra Liner (D50=9") Table 8.05f
Td = 3 Table 8.05g
CHECK T, and Q,,t for normal depth
d(ft) A(ft^2) R(ft) n V (fps) Q--cfs)
2.3 15.87 1.09 0.068 2.77 43.99
T_t = 2.04 Good
TERMINOLOGY:
L= Watershed Hydraulic Length, (ft)
Hv = Watershed Vertical Relief, (ft)
C = Rational Runoff Coefficient
Qp = Peak Inflow, (cfs)
I = Rainfall Intensity, (in./hr.)
A = Watershed Area, (acres)
C = Rational Runoff Coefficient
Tc = Time of Concentration
I = Rainfall Intensity, (in./hr.)
0