20001195 Ver 6_Stormwater Info_20081027

October 24, 2008
Mr. Joseph Gyamfi C)0 - 119 S
NCDENR DWQ V C.t" LA
1650 Mail Service Center
Raleigh, NC 27699-1650
Re: CDIA SWMP for Area West of 2nd Parallel Runway's request for more information.
Dear Mr. Gyamfi,
HDR Engineer, Inc of the Carolinas has received a request for additional information regarding the
modifications to the stormwater management plan dated September 27, 2008. We have, addressed
all your comments in the letter and are resubmitting only the drawings for Wallace Neel Road, Old
Dowd Road and Taxiway Victor that are essential for your final review. Attached are the following
documents which constitute our Express Review Stormwater Management Plan submittal package
for the above referenced project:
_1. Two (2) copies of only the revised portions of the Express Review Stormwater Management
Plan
2. Two (2) copies of only the revised supporting information pertaining to CDIA SWMP
including
a. Detailed description of the proposed SWMP with TSS and Nutrient removal
calculations for Basin Area B
b. Calculation and summary sheets for the Bioretention Basin and Grass Swales
c. A revised BMP Supplement for the Bioretention Basin
d. Two (2) copies of the signed Operation and Maintenance Plan including the vacuum
sweeping revisions
3. Two (2) copies of full size plans including the selected roadway and SWMP drawings.
4. One (1) data CD of full size plans
We trust this completes the express review package. HDR looks forward to working with
NCDENR in providing these BMPs. If you have any questions concerning the information in this
letter please feel free to contact me at (704) 338 - 6825.
Sincerely,
HDR Engineering, Inc. of the Carolinas
o c
Ronald A. Geiger, PE 7 200$
Project Manager p?NR- gTORMw ???
D
cc: Jack Christine, CDIA?pNDSAN .
Andy Shook, T&B
HDR Engineering, Inc. ofthe Carolinas 128 S Tryon Street Phone: [phone]
Suite 1400 Fax: [phone]
Charlotte, NC 28202-5004 www.hdrine.com
STORM WATER MANAGEMENT PLAN
AREA WEST
OF
2ND PARALLEL RUNWAY

D ?? jaan?,??
O C T 2 7 2008
?+yEpo srTEFt QUALITY
ORMWAIER BRANCH
Charlotte im Douglas
INTERNATIONAL AIRPORT
REVISED OCTOBER 24, 2008
PREPARED BY:
4944 Parkway Plaza Boulevard, SUITE 350
Charlotte, NC 28217
704-426-6070
704-426-6080 (FAX)

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to'?
HDR ONE COMPANY I Many Solutions
128. S. Tryon St., Suite 1400 1 Charlotte, NC 128202-5004
Phone: [phone] Fax: [phone]
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p-0. Box 19066 Chariofite State. NC , Zip:
E y- p o o- 1 1 R S U (.o
EXPRESS RE.v[E +r PROGRAM STORM WATER MANAGEMENT APPLICATION FORM
YMs fb m may be photocopied for us-, its an m-ig naI D
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1. GENERAL INFORMATION 0C 1 2 7 2008
1. Applicant's mane (specify the atame efthe corporation, individual; etc, who owns the project):
Charlotte Douglas International Airport (under the name City of Charlotte) R 00AU
2. Owner/Signing Official's name and title (person legally responsible for facility and compliance): W???S,?U STpRMWA?tBRN't?
Mr Jerry Orr, Airport Director
3_ Nmer Mailing Address for person fisted in itoM 2 above:
City,
28215
Phone Number: (LO4) 359.4000 Fax Ntunber. 70 659-4960_ Email Address: tiorr(mcharlotteairportcom
4. project Name (subdivision, facility, or establishment name - should be consistent with project nacre on
plans, speolfications, letters, inspection. and maintenance a*treenrents, etc.):
CDIA SWMP West f 2"' Parallel Ru ay2008 - -
s. Location of project (Street Addles):
5501 Josh Birmingham ParWay
City:
6. Directions to project site (from nearest major intersection):
Fast off of 1-85 ontg 13014 graham Pa av. then right onto Jpsh BiUingham Parkway.
7. Latirude:35` 12' 20.53" Longitude: 80° 57' 53.761" of project
$. Contact person who can answer questions about the project:
Charlotte
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County: Mecklenburg
Name: Ron Geiger Telephone Number: 04 338.6825
FaxNurnber: [phone] Zaihkddress: rgeigeVdrinc.com
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1/2008 version 1.0 Page 1 of 5
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State of North Carolina
Department of Environment and Natural Resources
Div ision of Water Quality 401/Wetlands Unit
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K PERMI'T' VPORMATIOk
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1. Specify whether project is (check one): New Renewal X Modification
2. If this is anew project, under which local govertunent,s jurisdiction does the project fail (e-g. Town of
Cary; City of Raleigh, or Wake County)? n!a
3. Is there a state-approved stormwater management program implemented by the local govemment or state
under any of the following programs (Check all that apply)?
X Phase 11 Post Construction X Water Supply Watershed Neuse or Tar Pamlico NSW
Randleman WS'WS -GSlvip .Coastal Counties _HQW ORW
4. if this application is being submitted fox a renewal or modification to an existing permit. list ft existing
permit number EXP 06-11 SM and its issue date (ifknown) March 22, 2007
5. Specify the type of project (check one)' X Other
Low Density High Density F-edevelap1=1 General Permit 6_ Additional Project Requirements (check the ones applicable)*
CA.MA ?Major X Sedimentati0n1Erosien C00trol X 404"401 Permit X '\TDES Storntwatsr --Oater
Information on required state permits can be obtained by contacting the Customer Service Centcr at
1-877-623-6748
III, PROJECT INFORMATTON
1. In the space provided below, =raarize how storm-,- ater will be treated. Also attach a detailed AMItive
(one to two pages) describing stormwater management for the projecL
strips, extended
Runoff will be treated through the use of vacuum Sweeping, grass swakas, d6?
Tiro detention basins, and bioretention.
2. Stormwater runoff froth this project drains to the
3. Total Project Area: 682 acres
Catawba River basin..
4. Project Built Upon Area: 18 %
5. How many drainage areas does the project have? 11
6. Complete the following information for each drainage area. If there are more t>tan two drainage areas in
the projec*, attach an additional sheet with. the inf oration fez each area provided in the saute format as
below.
112008 version 1.0 Page 2 of 5
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7. How vas the off -site impervious area listed above derived? nla
1CV_ DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of my 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.
1_ The following covenants are intended to ensure ongoing compliance with state riparian buffer
autharLeatior or General Certification numbers as issued by the
Division of Water Quality- These covenants may not be changed or deleted without the consent of the
,State.
I No more than square feet of any for shall be covered by structures or impervious
materials. Impervious materials include asphalt gravel, concrete, brick, stone, slate or similar material
but do not include wood decking or the water surface of swtmming pools.
3. Swales shall not bef lied h% pipe4 or. altered except as necessary to provide driveway crossing.
4. Built-upon area in excess o{the permitted amount requires a modified water quality certification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater
control system. These connections to the stormwater control system shall be performed in a manner that
maintains the integrity and performance of the system as permitted
By your signature below, you certify that the recorded deed restrictions and protective covenants for this
project shall include all the applicable items required above, that the covenants will be binding on all parties
and persons claiming under them, that they will nun with the land, that the required covenants carmot be
changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any
.r; Air
lot.
i
112005 Version 1.4 Page 3 of 5
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* Impervious area is defrt+ed as the built upon area inctuarng, but nor trmrrea to, Dwjarngs, rvaas, parlunb
areas, sidewalks, gravel areas, etc.
6a. Drainage Area Continuation Sheet
Receiving Stream Name Little Paw Creek Paw Creek Paw Creek Beaverdam Creek
Receiving Stream Class C C C WS-IV; B; CA
Drainage Area 64.53 52.77 4.87 16.66
Existing Impervious Area 14.52 21.48 2.20 0
Proposed Impervious Area 31.62 26.18 1.37 2.96
% Impervious Area (total) 48.99% 49.61% 28.13% 17.780/6
On-site Buildings
On-site Streets 1.37 0.27 1.70
On-site Parkin
On-site Sidewalks
Other on-site (Runway) 30.24 25.91 1.37 1.26
Off-site
Total: 31.62 Total: 26.18 Total: 1.37 Total: 2.96
Receiving Stream Name Coffee Creek Paw Creek Ticer Branch Paw Creek
Receiving Stream Class C C C C
Drainage Area 15.91 24.30 27.89 2.85
Existing Impervious Area 0.46 15.32 4.31 0
Proposed Impervious Area 5.98 5.35 14.44 0.18
% Impervious Area total 37.59% 22.02% 51.77% 6.32%
On-site Buildings
On-site Streets
On-site Parkin
On-site Sidewalks
Other on-site (Runway) 5.98 5.35 14.44 0.18
Off-site
Total: 5.98 Total: 5.35 Total: 14.44 Total: 0.18

Receiving Stream Name Ticer Branch
Receiving Stream Class % C
Total Drainage Area
On-site Drainage Area
Off-site Drainage Area 222.34
Existing Im ervious* Area 0.21
Proposed Im ervious* Are 1.69
% Impervious Area (total) 0.76%
s.rr-

On-site Buildings ------------
On-site Streets
On-site Parkin
On-site Sidewalks
Other on-site
Off-site
Total (s 0.00
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V. SUPPLEM NT FORMS
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The applicable stormwater management supplement form(s) lasted below must be submitted or each BMP
specified for this project- The rrtnsi current form(s) located on the 4011vretlands unit'website at
him:812 enr.state. c-u312_Rf_tM_f_0_rM .htm must be used. Please include both the Design 5WXaV and the
Required Items Checklist along with all required items and supporting design calculations.
Bioretention. Supplement
Wet Detention Supplement
Dry Detention Supplement
Level SpreadexfFilter Strp/Restored Buffer Supplement
Stormwater Wetland Supplement
Grassed Swale Supplement
Sand Filter Supplement
lnfiltratian Trench Supplement
Infiltration Basin Supplement
Vl_ SUB1v1ITTA.L REQUMMENTS
only complete application packages will be accepted and reviewed by the Division of Water Quality (DbVQ).
A complete pact.-age includes all of the items listed below- The complete application package should be
submitted to the DWQ Central Office.
1. Please indicate that you have provided the following required information by initialing in the space
provided next to each item. Initials
• Original and two copies of the Express Review Stormwater Management Application
• Signed and Notarized Inspectlon and !Maintenance Agreement
• Three copies of the applicable Supplement Fount(s) for each 13W
• Application processing fee (payable to DWQ)
a Detailed narrative description of stormwater treatment/managemerit
• Three copies ofplans and specifications, including:
- Development/proj ect name
Engineer and firm
. Legend
- North arroNv
Scale
- Revision number & date
Vean high water line
- pimensioned property/project boundary
-Location map with named streets or NCSR numbers
. Original contours, proposed contours, spot elevations, finished floor elevations
- Details ofroads, drainage features, collection system, and stormwater control measures
_ Wetlands and streams delineated, or a note on plans that none exist
- Existing drainage (including off site), drainage easements, pipe sizes, runoff ealailations
- Drainage areas delineated
- Vegetated butlers (where required)
1/2008 version 3.0 Page 4 of 5
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VII. AGIEN'T AUTHORIZATION
If you Nri3h to designate authority to another individual or firm so that they may provide i iformation on your
behalf, please complete Us scction.
Ron Geiger @ HDR Engineering Inc
Designated agent (individual or firm):
mailir:g Address: 125 South Tryon St. Suite 1400
Civ: charlotte State: NC Zip- 28202-3004
Fhoze: 7(_ 4) 338-8825 Fax: (704) 33&8760
VU A PijcANT'S CERTIFICATION
4 (print or type name of person filled in Gemrai Jnformalion, item 2) J e r r v ir r
certify that the information included on this application foram is, to the best of my knowledge, correct and that
the project will be constructed in confDrinance 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 2N .1000.
Signature: 8 ' • O
0 J L ? 0 C Ch
r„,rr
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1/2008 version 1.0 Page 5 of 5
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CHARLOTTE - DOUGLAS INTERNATIONAL AIRPORT
STORM WATER MANAGEMENT PLAN
Operation & Maintenance Plan
for
Area West of 2nd Parallel Runway
Prepared by Talbert Bright Inc.
In association with HDR Engineering
Revised October 15, 2008
The following Operation & Maintenance Plan (OMP) has been prepared in compliance with
NCDENR DWQ 401 permitting requirements for the construction and operation of the project
entitled, Taxiway Victor Old Dowd Rd Relocation and Wallace Neel Road Relocation" located at
Charlotte/Douglas International Airport (CDIA), Charlotte, North Carolina. This project involves the
construction of a new parallel taxiway west of the existing terminal facility, Old Dowd Road
Relocation and the relocation of Wallace Neel Road. The OMP describes CDIA maintenance
responsibilities for the monitoring, cleaning, and necessary maintenance of the following Best
Management Practices (BMPs) for these new facilities:
1. Grassed Swales
2. Filter Strips
3. Extended Dry Detention Basins
4. Pavement Sweeper with Vacuum
5. Bioretention Basin
OPERATION AND MAINTENANCE AGREEMENT
I acknowledge and agree by my signature below that 1 am responsible for the
performance of the six maintenance procedures listed in this OMP. I agree to notify
DWQ of any problems with the system or prior to any changes to the system or
responsible party.
Print name: T. J. Orr
Title: Aviation Director
Address:5501 Josh Birmingham Pkwy. Charlotte, NC 28208
Phone [phone]
Signature:
Date:
Robe f 4 A n A f eSS , a Notary Public for the State of North
Carolina, County of Mecklenburg, do hereby certify that
T. --L OR V, _ personally appeared before me this Wk
day of 0--66e f- , 2008, and acknowledge the due execution of the forgoing
Operation & Maintenance requirements. Witness my hand and official seal,
'Rota, CRT AV13 bpc-ss
SEAL
My commission expires S121 AZ o I o
1.0 Grassed Swale
1.1 Description
Grassed swales typically are used in residential and commercial developments as well as
along highway medians as alternatives or enhancements to conventional storm sewers. Swales
remove pollutants from stormwater by filtration through grasses and other vegetation, settling,
and infiltration through soil. Grassed swales are occasionally enhanced with check dams to retain
water and promote infiltration.
1.2 Monitoring
The vegetation in the grassed Swale should be inspected at least twice per year.
1.3 Maintenance
Maintenance of grassed swales involves grooming the vegetation and occasionally removing
trash. Routine mowing is required for turf grasses. Grass shall be cut no lower than 5 inches. In
addition, the grass should be allowed to grow to the maximum height consistent with the species
and aesthetic requirements. The frequency of trash removal depends on the location and
attractiveness of the swale as a disposal site. Excessive sediment should not accumulate if erosion
is controlled adequately upstream. However, if excessive siltation occurs, the sediment must be
removed periodically (no less than once annually). Sediment that accumulates in the Swale may
be prone to resuspension during large storm events and can kill the grass. Sediment should be
removed when it reaches a depth of 4 inches or when it covers the grass. Additional annual
maintenance activities are as follows:
¦ Repair erosion and regrade the Swale to ensure that runoff flows evenly in a thin sheet
through the Swale.
¦ Revegetate the Swale as needed to maintain a dense growth.
1.4 Schedule
Activities Frequency
Inspect vegetation in grassed swale Bi-Annually
Remove debris As needed
Remove sediment As needed, (annually or when it reaches a
depth of 4 inches or covers the ass)
Repair erosion Annually
Re grade and reve etate the Swale As needed
Mow grassed Swale Routinely for turf asses to maintain hei ht
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2.0 Filter Strip
2.1 Description
Filter strips are uniformly graded and densely vegetated sections of land, engineered and designed
to treat runoff from and remove pollutants through vegetative filtering and infiltration. Any
natural vegetated form, from grassy meadow to small forest, may be adapted for use as a filter
strip. However, the vegetation must have dense foliage and thick root mat to be effective. Filter
strips are designed to accept runoff from overland sheet flow from upgradient development. The
strips trap sediment and sediment-bound pollutants. Because they "disconnect" impervious
surfaces from storm sewers and lined channels, filter strips reduce effective imperviousness and
help reduce peak discharge rates by increasing travel time and by increasing abstractions from the
total flow. Filter strips typically include some method of spreading the runoff as sheet flow.
2.2 Monitoring
During the first 1 or 2 years after construction, filter strips should be inspected for proper
distribution of flows and signs of erosion during and after major storm events. After the first 1 or
2 years, the strip may be inspected annually or biannually. If evidence of erosion exists, the
eroded areas should be filled in and reseeded. The cause of the erosion should then be determined
and, if possible, eliminated.
2.3 Maintenance
With minimal maintenance, filter strips can be effective indefinitely. However, strips that
are not maintained properly may quickly become nonfunctional. Maintenance involves routine
activities such as mowing, trimming, and replanting when necessary. Strips that are used for
sediment removal may require periodic regrading and reseeding of their upslope edgy because
deposited sediment can kill grass and change the elevation of the edge such that the s ornnwater
no longer flows through the strip in thin sheets. Maintenance requirements are as follows:
¦ Remove deposited sediment, especially from the upstream edge, to maintain original
contours and grading.
¦ Repair gullies and rills that form and regrade the filter strip to ensure that the runoff flows
evenly in a thin sheet over the filter strip.
¦ Reseed and regrade the filter strip to maintain a dense growth of vegetation, especially if
the strip has been used for sediment control.
• Mow filter strips vegetated with grasses and harvest the clippings two to three times a
year to promote the growth of thick vegetation with optimum pollutant removal
efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to
grow as tall as 12 inches depending on aesthetic requirements.
¦ Keep the filter strip free of litter.
¦ Evaluate the runoff from adjacent areas to determine if it is providing enough water and
nutrients or if additional irrigation and fertilizer are needed.
¦ Perform periodic aeration of the soil if excessive compaction is interfering with
maintaining a good vegetative cover.
¦ Test the soil pH and compare it to the recommended pH for the specific vegetation. Add
lime if indicated.
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2.4 Schedule
Activities Frequency
Inspect filter strips and level spreaders For the first two years during and after major
storm events
After first two ears annually or bianruall
Remove deposited sediment Annually, as needed
Repair gullies and rills that form As needed
Re grade the filter strip As needed
Reseed and re grade the filter strip As needed
Mow filter strips vegetated with grasses Regularly to maintain height
Harvest clippings Two to three times per ear

Remove debris .
As needed
Evaluate runoff from adjacent areas As needed
Perform eriodie aeration of the soil As needed
Test the soil pH As needed
3.0 Extended Dry Detention Basins
3.1 Description
As the name of this BMP implies, these basins are typically dry between storm events. To qualify
as a BMP, dry basins should incorporate extended detention of runoff derived from small rainfall
events. In dry ED basins, a low-flow outlet slowly releases water retained below the primary
outlet device over a period of days. This BMP can be applied in low-density residential,
industrial, and commercial developments where sufficient space is available. The primary
purpose of dry ED basins is to attenuate and delay stormwater runoff peaks. The dry ED basins
for this project will include a sand filter bottom with a subsurface piping system for removal of
the filtered water to enhance the pollution removal of the dry ED basin.
3.2 Monitoring
• The facility should be inspected annually to verify that the facility is operating as designed
and to schedule any required maintenance. If possible, inspections should occur during Nvet
weather to verify that the facility is maintaining desirable retention times.
• As a minimum, the following items should be included in the annual inspection:
¦ Embankment settling, woody growth, animal burrowing, and signs of piping
• Condition of grass cover on the embankment, basin floor, and perimeter of the tasin
¦ Riprap displacement or failure
¦ Principal and emergency spillway to confirm that they meet design plans for operation
• Outlet controls, debris racks
¦ Outlet channel conditions
¦ Safety features
¦ Access for maintenance equipment
• Clogging of the low-flow orifice and sub-drainage piping
¦ Drainage of the low-flow channel
• Sediment accumulation in the sand media
3.3 Maintenance
Maintaining turf grass on the tops of berms and on the exterior slopes of embankments is
advisable to facilitate access to the facility and inspection of the embankment. Any seedlings or
planting should be removed at the earliest opportunity and the disturbed areas should be stabilized
properly. Control of woody vegetation will require periodic mowing and a policy of not allowing
plantings on these facilities. The facility should be managed with grass no shorter than 6 to 8
inches and be mowed at least twice annually.
Root voids and animal burrows should be plugged with material similar to the surrounding
materials, and capped just below grade with stone, concrete, or other material. If plugging the
burrows does not discourage burrowing animals from returning, further measures should be taken
to remove the animal population or to make critical areas of the facility unattractive to them.
Dry ED basins should have enough volume to account for sediment accumulation over time.
Trash and debris can accumulate quickly in dry ED basins, requiring frequent cleaninat least
twice annually. The accumulated sediment, mud, sand, and debris must be cleaned out Nvith earth-
moving equipment and disposed of properly, on average, every 2 to 10 years or when the basin
has lost approximately 20 percent of its capacity. Caution should be taken not to damage the sub-
drainage system. Once these materials are removed, the disturbed areas should be stabilized and
revegetated immediately; otherwise; sediment will move to downstream areas. Freshly seeded
areas should be protected with an erosion mat that has been securely staked in place to prevent
flotation. In many cases, sodding offers the best approach to stabilization after removal of
sediment and debris.
The sand filter bottom and sub-drainage piping system should be inspected bi-annually for
uniform slope and depth conditions in the sand. The bottom of the basin must be accessible for
maintenance. The access path should be a minimum of 10 feet wide, have a maximum slope of
5H:1 V. Steeper slopes may result in rutting and require more access path maintenance.
3.4 Schedule
Activities Frequency
Inspect the dry ED basins Annually (once during rain event, once during
d period)
Maintain turf ass As needed

Remove seedlings or planting _
As needed
Mow Biannually (as a minimum) to maintain height
Unplug root voids and animal burrows As needed
Remove debris Biannually
Remove sediment, mud, sand, and debris Every 2 to 10 years or when the basin has lost
approximately 20 percent of its capacity
Stabilize and reve etate As needed
Maintain access path As needed
4.0 Pavement Sweeper with Vacuum
4.1 Description
Pavement sweeping and vacuuming includes use of self-propelled or walk-behind equipment to
remove sediment from streets, roadways, and other pavements. Sweeping and vacuuming
prevents sediment from the project site from entering storm drains or receiving waters.
4.2 Monitoring
Regular inspection of the pavement is critical. Make sure that the sweeper does not sweep up
anything hazardous, since it might cause damage to the machine. Schedule sweeping will occur
immediately after special events like installation of lighting in pavement, pavement closures, and
following grass cutting operations. A trash and leaf litter pick-up program will be conducted
weekly to avoid leaf piles and decomposition of the leaves and other trash in the storm drain
inlets. Pavement sweeping will be attempted prior to rain events that have 1" or greatar rainfall
depth when there is advanced storm prediction.
Management of the debris from sweeper hoppers shall include collecting and taking debris to a
secure temporary storage area or directly to its permanent disposal site. Do not empty sweeper
hoppers temporarily onto areas near storm drains or surface water bodies or where wind or rain
could re-entrain or scatter the debris. Avoid conducting sweeping operations during rainstorms.
Sampling and testing procedures will be conducted to evaluate the effectiveness of vacuum
sweeping with respect to the pollutant removal credits assigned to it. A quarterly repot shall be
submitted to DWQ for review. Debris collected will be weighed prior to final disposal and logged
for inclusion in the DWQ report. Prior to initial operation, a testing procedure will be established
to identify the sweeping protocol for debris removal and to establish the expected removal
efficiency from this practice. The testing procedure and its results will be submitted to DWQ for
review and approval.
4.3 Maintenance
Inspect pavement prior to forecast of extended rain events, weekly during the rainy season, and at.
monthly intervals during the non-rainy season. More frequent removal may be require3 in some
jurisdictions, if considerable sediment/debris is observed during inspection. Be careful not to
sweep up any unknown substance or any object that may be potentially hazardous. Adjust
brooms frequently; maximize efficiency of sweeping operations. After sweeping is finished;
properly dispose of sweeper wastes at an approved dumpsite.
4.4 Schedule
Activities Fre uenc
Inspect pavement Monthly
Sweep pavement Bi-Weekly, after special events prior ?o reo penintr
Submttal of sweeping logs to DWQ Quarterly
Pick u trash and leaves Weekly
Monitoring/logging of debris collected After each sweeping event
Inspect and Adjust brooms Quarterly
Dispose of sweeper waste After each sweeping event
Bioretention Basins
5.1 Description
• Bioretention Basins treat stormwater runoff on development sites commonly located in
densely site constraints such as parking lot islands or within small pockets of land uses.
Surface runoff is directed into shallow, ground depressions. These depressions are
designed to integrate many of the pollutant removal methods that function in natural
• ecosystems. During rainstorm events, runoff ponds above the mulch and soil in the
bioretention system then filters through the mulch and prepared soil mix. Typically, the
filtered runoff is collected in a perforated underdrain and diverted to the storm drain
system.
•
5.2 Monitoring
After the bioretention basin is established, an inspection will be conducted once a month
• and within 24 hours after every storm event greater than 1.0 inches.
5.3 Maintenance

• Like any landscape feature, bioretention areas must be pruned, mulched, and initially
watered and limed. Grassed bioretention cells are usually mowed. Because plw its are an
important investment and essential to the aesthetic appeal of bioretention systems, they
• need to be established as quickly as possible. The need for rapid establishment requires
• bioretention cells to be limed, if indicated by a soil test. Additionally, plants may need to
be spot-fertilized to ensure growth and survival in soils. Watering the plants ev,:ry 2 to 3
days for a couple of months helps ensure vegetation survival. The frequency of these
• tasks varies seasonally, with more frequent maintenance required in summer than in
• winter. Maintenance to bioretention basins include occasional removal of mulch and the
top layer of fill soil. Since clogging occurs frequently at the top of the soil column, the
bioretention basins rarely need to be completely excavated.

Watering should not be required after establishment (about 2 to 3 years).
H
i
owever, water
ng may be required during prolonged dry periods after plants
• are established.
• 0 Inspect flow entrances, ponding area, and surface overflow areas periodically.
Replace soil, plant material, and/or mulch in areas where erosion has occurred.
If
di
se
ment is deposited in the bioretention facility, immediately determine the
source, remove excess deposits, and correct the problem.
• • Occasional pruning and removal of dead plant material may be necessary.
Periodic weeding is necessary until groundcover plants are established.
0 Replace mulch annually in bioretention facilities where heavy metal deposition is
likely (e.g., commercial/ industrial uses, parking lots, or roads). In residential or
• other settings where metal deposition is not a concern, replace or add mulch as
needed to maintain a 2 to 4 inch depth at least once every two years.

• Soil mixes for bioretention facilities are design to maintain long-term fertility and
pollutant processing. Therefore, the capability tests should be conducted in 20
years for metal toxicity. If this is above the standard allowance then the soil.
should be replaced.
5.4 Schedule
Activities Frequency
Mowing 2-12 times / year
Mulching 1-2 times / year
Mulch removal 1 time / 2-3 ears
Watering 1 time 12-3 days for first 1-2 months.
Sporadically after establishment
Fertilization 1 .time initially
Misc. upkeep 12 times / ear
Reference:
http://www.bae.ncsu. edu/stonnwater/PublicationFil esBioretention2006.pdf
http://h2o.enr.state.nc.us/su/documents/Ch l2-Bioretention_00l .pdf
CHARLOTTE/DOUGLAS INTERNATIONAL AIRPORT
STORM WATER MANAGEMENT PLAN
Project Narrative
for
Area West of 2nd Parallel Runway
Prepared by Talbert Bright Inc.
In association with HDR Engineering
September 8, 2008
Project Description
Charlotte/ Douglas International Airport (CDIA) is proposing to construct a new
runway and taxiways just west of the existing terminal on airport property in
accordance with the airport's master plan. The project also includes two cross-
connector taxiways to connect to the taxiway network, the associated navigation
aids and lighting for the new airfield pavements to the existing runway, and the
relocation of Wallace Neel Road to the western portion of the property (from
Garrison Road to Old Dowd Road). Old Dowd Road relocation connects the
relocated Wallace Neel Road to the existing Old Dowd Road. The existing
buildings and pavement within the footprint of the proposed airfield will be
removed.
Construction Phasing and Temporary Measures
Improvements to allow the new runway and taxiways to be completely
functional will take approximately three years. Phasing will consist of a
Construction Package 1 - Clearing, Grading, and Drainage, and a Construction
Package 2 - Final Grading, Pavement, and Lighting. Relocation of the existing
roadways will be integrated into the airfield improvements. On-site soils will be
used to construct all improvements. Package 1 is anticipated to be two years in
duration, with Package 2 lasting 1 1/2 years. Some overlap of these two
construction contracts is anticipated. An addendum for Package 1 is planned to
incorporate the final roadway design plans (to include fine grading, pavement,
and roadway drainage).
Construction to allow the relocation of Wallace Neel Road to be completed and
vehicular traffic restored has been programmed to be expedited within the two
contracts. Taxiway Victor and relocation of Old Dowd Road has been
incorporated into the second phase of the project. Therefore, permanent storm
drainage facilities and best management practices (BMPs) for the roadway are
planned to be operational prior to the facilities on the airfield.
Temporary Sediment and Erosion Control measures are proposed and are
illustrated on the plans. This project has obtained an approved NCDENR
sediment and erosion control permit based on the attached plans.
Storm Water Management Facilities
Permanent drainage facilities have been proposed in accordance with the various
governing jurisdictions for this project. Storm water conveyance on the airport's
airfield has been designed in accordance with FAA criteria to pass the 10-year
design storm. Drainage for the roadway relocation has been designed in
accordance with NCDOT criteria to pass the 50-year storm for cross pipes, and
the 10-year storm for roadway systems. In addition, because of the proximity to
Interstate 485, NCDOT has required a 100-year check on the systems to prevent
overtopping on 1-485. Lastly, the onsite systems are designed in accordance with
City of Charlotte Land Development Peak Discharge control to limit the 2-year
and 10-year storm events to the pre-development peak discharges. To
accommodate this requirement, detention facilities are located on the airfield to
attenuate the discharge. These areas have been modified to act as extended dry
detention basins for water quality control as well.
Permanent post-construction site runoff control has been planned to take
advantage of the site requirements for runway and taxiway operations per FAA
requirements, and to work within the limitations of the site layout. In addition,
FAA requirements prevent some of the more acceptable BMPs (i.e. wet ponds are
prohibited within 10,000 feet of an airfield). Given these requirements and site
characteristics, the proposed site runoff controls for storm water treatment
consist of the following:
¦ Filter Strips - Grass shoulders along the runway and taxiway pavements,
graded at 3% slope, will serve as a filter strip. The longitudinal slope of
these pavements supports runoff in a laminar flow. These shoulders range
from 70 feet to 200 feet in width. TSS removal for each 50 feet of filter strip
is projected at 25%, and N removal at 25%.
¦ Grassed Swales - The site design includes perimeter swales at mild slopes
to collect runoff from the grass shoulders (Filter Strip) and transport it to a
proposed drainage inlet, or a fill slope flume. The longitudinal slope is 2%
or less, and will serve as a water quality device. TSS removal for grassed
swales is projected at 35%, with N removal at 20%.
¦ Extended Dry Detention Basins - These basins will also serve for peak
discharge control. These basins will have a sand filter bottom with an
underdrain system to allow for higher efficiency in pollutant removal, and
to prevent standing water. TSS removal is projected at 50%, while N
removal is 10%.
¦ Pavement Sweeping with Vacuum - This non-structural BMP will be
employed on a frequent basis, in accordance with the operation and
management plan. Because of FAA requirements for airfield safety, this
practice is a common occurrence with CDIA, and will be performed on a
weekly basis. CDIA proposes the purchase of a Vacuum Sweeper that will
have a TSS removal performance of 78%, and N removal of 60%. A copy
of the type proposed is included in the SWMP submittal.
¦ Bioretention - The design will incorporate grass as the growing media for
TSS removal performance. This has a removal of 85 % for TSS. This
design has the ability to be installed in a compacted area along a road
side. A filter strip will lead the stormwater to the bioretention basin.
Supporting Calculations of Treatment Devices
A preliminary discussion with NCDENR DWQ staff has confirmed this project
shall follow the calculation procedure to be listed in the BMP Manual for
treatment train processes (i.e. BMPs in series). Supporting calculations are
attached in spreadsheet form to illustrate the use of the above BMPs throughout
the project. Plans are attached to illustrate where each BMP is located to allow
runoff from the pavement to go through a series of treatment devices prior to
discharging off-site. The calculations include the use of pavement sweeping as a
non-structural BMP.
Eleven drainage areas comprise the project area's stormwater runoff. Two of
those areas discharge to a water supply watershed which requires nutrient
removal (35% N and P). The other seven areas are designed to remove the
targeted 85% TSS goal.
FAA Requirements
TAXIWAY SAFETY AREAS
Design Standards. The taxiway safety area shall be:
(1) cleared and graded and have no potentially hazardous ruts, humps,
depressions, or other surface variations;
(2) drained by grading or storm sewers to prevent water accumulation;
(3) capable, under dry conditions, of supporting snow removal equipment,
aircraft rescue and firefighting equipment, and the occasional passage of aircraft
without causing structural damage to the aircraft, and
(4) free of objects, except for objects that need to be located in the taxiway safety
area because of their function. Objects higher than 3 inches (7.6 cm) above grade
should be constructed on low impact resistant supports (frangible mounted
structures) of the lowest practical height with the frangible point no higher than
3 inches (7.6 cm) above grade. Other objects, such as manholes, should be
constructed at grade. In no case should their height exceed 3 inches (7.6 cm)
above grade.
RUNWAY SAFETY AREAS
Design Standards. The runway safety area shall be:
(1) cleared and graded and have no potentially hazardous ruts, humps,
depressions, or other surface variations;
(2) drained by grading or storm sewers to prevent water accumulation;
(3) capable, under dry conditions, of supporting snow removal equipment,
aircraft rescue and firefighting equipment, and the occasional passage of aircraft
without causing structural damage to the aircraft; and
(4) free of objects, except for objects that need to be located in the runway safety
area because of their function. Objects higher than 3 inches (7.6 cm) above grade
should be constructed, to the extent practicable, on low impact resistant supports
(frangible mounted structures) of the lowest practical height with the frangible
point no higher than 3 inches (7.6 cm) above grade. Other objects, such as
manholes, should be constructed at grade. In no case should their height exceed
3 inches (7.6 cm) above grade.
CDIA SWMP
Area West of 2nd Parallel Runway
BMP Treatment Train Effeciency
Summarv
October 13, 2008
HDR Engineering, Inc
of the Carolinas

Outfall Total
Impervious
Area (Ac)
% TSS
Removal
% N
Removal
% P
Removal Weighted
Removal
Eff
Total Weighted Site
Composite
A 1.47 92% 1.35
B 16.58 91% 15.03
D 1.63 91% 1.49
E 0.00 0% 0.00
F 6.23 87% 5.44
G 26.65 88% 23.46
H 20.62 89% 18.28
K 32.20 88% 28.27
L 14.35 85% 68% 66% 12.23
M 5.24 90% 68% 66% 4.71
N 38.75 86% 33.35
P 9.82 89% 8.77
-116.04 1 51.31 88%
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Sweep System-Power
E1194le
Make John Deere 4045 Tier II
Type 4 cylinder Turbocharged Diesel
Displacement 2276 in' (4.5 L)
Horsepower 99 (75 kW) @ 2500 RPM
Fuel Tank Capacity 50 gal (189 L)
Air Cleaner Two stage, dry type
Oil Filter Spin-on, full flow
Auto Shutdown for high temp/low oil pressure
with visual indicator
Engine Pre-Cleaner Standard
Sweep System-Components
Instrumentation
Tachometer, hour meter, oil pressure, fuel, volt-
meter, engine temperature, air intake restriction
indicator, hydraulic filter restriction indicator,
low spray water, hopper up, full load indicator
Electrical System
Alternator 120 amperes
Battery 12 volt. group 31, 1000 CCA
Lights Side broom, rear clearance, rear
identification
Reversing Safety Electric back-up alarm, sweep
components raise automatically
Circuit Breaker Auto reset
Wiring Harnesses Color coded, hot stamped
and labeled every 4 in (I00ntm)
General Specifications
Sweeping path:
Suction nozzle only
30 in (762 nun)
Suction nozzle and one side broom
50 in (1270 mm)
Suction nozzle and extension broom
83 in (2108 mm)
Suction nozzle, side and extension broom
102 in (2591 mm)
Blower
Drive Fluid Coupler
Speed 2500 RPM
Blower Rating 15,560 CFM (441 m'/min.)
02500 RPM
Blower Construction Abrasion resistant
steel vanes
Blower Housing 10 gauge (3.4 mm), rubber
lined for extended wear
Vacuum Nozzle and Hoses
Nozzle width 30 in (762 mm)
Pickup Area 174 in' (1119 cm')
Construction Abrasion resistant
steel components
Hose Connection Quick disconnect type at
lower area near pickup head
Hose Construction Flexible rubber, steel
reinforced smooth bore
Hose 1 I in (280 mm) inside diameter
Automatic Shutter Door
Options
Side Broom
Diameter 28 in (711 mm)
Disc Construction Steel plate
Speed Constant
Drive Hydraulic motor, protected by relief valve
Mounting Free floating trailing arm
Adjustment Inward/outward, forward/backward
Digging Pressure/Wear Control Pneumatic
in cab
Lift Control Pneumatic from control panel
Type Segment set disposable
Material Oil tempered steel wire
Extension Broom
Diameter 16 in (406 mm)
Length 60 in (1524 nun)
Speed Constant, non-reversible
Drive Hydraulic motor, protected by relief valve
Digging Pressure/Wear Control Pneumatic
in cab
Lift Control Pneumatic from control panel
Type Polypropylene prefab, disposable
Location Center of sweeper
Hydraulic System
Purpose Powers hydraulic motors on side
broom, extension broom, and hopper cycle
Hydraulic Pump Capacity 16 GPM (61 LPM)
@ 2500 RPM
Hydraulic Pump Direct gear driven, tandem
type
Reservoir Capacity 23 gal (87 L)
Filter 10 micron, spin-on type with in-cab
restriction indicator
Debris Hopper
Volumetric Capacity 8.0 yds' (6.0 m )
Floor Angle 10°
Dump Angle 60°
Construction 7 gauge ( 4.5mm) steel sides and
top, 7 gauge (4.5mm) steel floor
Lifting Double acting hydraulic cylinder
Hopper Dump Door Opens and closes
hydraulically, latches automatically
Clearance required when dumping 13 ft 1 in
(3988 mm)
Full load indicator Weight actuated with
in-cab warning light
Hinged Hopper Screens
Safety prop Steel bar under body
Spray Water System
Water Tank Construction Polyethylene,
removable
Water Tank Capacity 330 gal (1250 L)
Pump Type Centrifugal with run-dry capability
Pump Capacity 5 GPM (19 LPM)
Pump Pressure 40 PSI (2.8 bar)
Spray Nozzles 7 inside each suction nozzle
4 at extension broom
2 at each side broom
Controls Variable flow switches located on
control panel
Filter 100 mesh, cleanable
Anti-Siphon Fill Standard
Hydrant Fill Hose 16 ft 8 in (5080 mm) with
coupling
Standard Equipment
Washdown Hose 25 ft (7620 mm) with nozzle
Chassis Warranty
Consult factory Sweeper
1 year parts and labor
Engine
Consult factory
Paint
Dual Sweeping Left Side Broom Tilt
side vacuum nozzle Front Spray Bar
and hose assembly, Stainless Steel Hopper
side broom, water Floor, Sides and
system, pivoting Rear Door
extension broom Epoxy Hopper Liner
Wandering Hose 8 in. Inspection Door
(203 mtn.) inside Hydraulic Aux. Pump
diameter, 12 ft. Rear Flood Light(s)
(3658 mm.) long, Rotating Beacon Light
hydraulic power Infinitely Variable
assisted, boom Side Broom
supported - Speed
Automatic Lubrication Beacon or Flood Light
System Protector
Diesel Cold Weather High Pressure Wash
Start Aid Down
Powder Coated, Stan-
dard Elgin white and
gray (for other colors
consult factory)
Your Elgin Dealer is:
Printed in U.S.A. 62006 Federal Signal Corporation
Federal Signal Corporation is listed on the NYSE. by the symbol FSS.
ecti;;:
Elgin Sweeper Company
1300 W. Bartlett Rd.
Elgin, Illinois, U.S.A. 60120-7529
847-741-5370 Phone
847-742-3035 Fax
www.eiginsweeper.com
Effective 4106 P/N: 0705241-1
Specifications subject to change without notice
Street and Parking Lot Sweeping
Urban streets and parking lots can accumulate large amounts of pollutants that can be
washed off during storm events. Streets and parking lots comprise a significant portion of the
total impervious area within a developed watershed, and a large percentage, if not the entire area,
of streets and parking lots are usually directly connected to the storm drain system. In an
investigation conducted by Bannerman (Bannerman et al, 1993), data on runoff volumes from
streets and parking lots collected during 4 years from two urbanized areas in Wisconsin indicated
that 54 percent of the total runoff volume from residential areas was due to direct runoff from
streets and parking lots, and that 80 percent of the total runoff volume from commercial areas was
due to direct runoff from streets and parking lots. A breakdown of the runoff volumes based on
source area is shown in Table 5-1.
Table 5-1. Percent Runoff Volumes Contributed by Source Area in Two Urbanized Areas
of Wisconsin
Source Area Percent Runoff Contribution
Feeder Collector Arterial Parking Total % due Total
Land Use Streets Streets Streets Lots to roads and Other %*
parking lots
Residential 34 20 -- -- 54 46
Commercial -- 10 21 49 80 20
* Other land uses include lawns, driveways, rooftops and sidewalks
Source: Adapted from Bannerman et al, 1993
Furthermore, Bannerman found that runoff from streets and parking lots contributed a
significant portion of the total runoff pollutant loading. Table 5-2 summarizes the pollutant load
contributions based on land uses, and indicates the total contaminant contribution in the urbanized
area attributable to runoff from streets and parking lots.
5-34
Table 5-2. Contaminant Load Percentages in Two Urbanized Areas of Wisconsin
Percent Contribution by Source Area Total
C
t
i
t
on
am
nan
Residential Commercial Industrial Contribution
by Streets
Contaminant

Streets Parking
Streets Parking
Streets Parking and
Lots Lots Lots Parking Lots
Total Solids 76 -- 57 31 20 60 78
Suspended 80 -- 68 27 25 55 80
Solids
Total 58 -- 56 28 19 29 5
Phosphorus
Dissolved 46 -- 50 27 18 11 39
Phosphorus
Dissolved 73 -- 50 39 16 73 82
Copper
Total Copper 78 -- 60 32 22 67 85
Total Zinc 80 -- 45 32 9 30 49
Fecal 78 -- 82 10 10 19 71
Coliform
Source: Adapted from Bannerman et al, 1993
Based on these data, streets and parking lots can contribute significant pollutant loadings
to urban runoff. Therefore, sweeping programs that can remove a portion of these materials from
streets and parking lots may significantly reduce the pollutant load contributions to urban runoff.
Road and Ditch Maintenance
Road and street surfaces undergo breakdown due to frictional action of traffic, freeze-
thaw breakdown, frost heaving, and erosion of road subbase. Failure to correct deteriorating
pavement can allow exposure of unstabilized subbase material to erosive forces of water and
subsequent increases in suspended solids concentrations. The same process occurs in roadside
ditches where high runoff rates cause channelization and erosion. Roadside ditches also
accumulate sediment and debris from the road surface, which enters runoff during rainfall events.
Maintenance of roads and cleaning and stabilization of ditches can help to reduce pollutant
loadings from these sources. In roadside ditches, reducing the length and slope of ditch runs and
5-35
IIC 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.
Pagel Plan
Initials Sheet No.
JGC SWMP 1. Plans (1" - 50' or larger) of the entire site showing:
pgs 2-5, 8-11 Design at ultimate build-out,
- Off-site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Forebay (if applicable),
- High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW), and
Boundaries of drainage easement.
JGC NIA 2. Plan details (1" = 30' or larger) for the level spreader showing:
- Forebay (if applicable),
- High flow bypass system,
- One foot topo lines between the level lip and top of stream bank,
- Proposed drainage easement, and
- Design at ultimate build-out.
JGC NIA 3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
- Level lip,
- Upslope channel, and
- Downslope filter fabric.
JGC NIA 4. A date-stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
Project not
constructed
yet
JGC N/A 5. A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.
JGC See this 6. The supporting calculations.
section
JGC See this 7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
section
JGC + N/A 8. A copy of the deed restrictions (if required).
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Part III, page 1 of 1
?? rtq
INC?NR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)I
11. PROJECT INFORMATION `I
Project name CDIA SAW Area inter uI Znu Sara lei
Contact name Ron Gieger
Phone number 704-338-&825
Date September 15, 2008
Drainage area number VIABCD
II DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP
Type of BMP Vacuum Sweeping
Drawdown flow from the BMP n/a cfs
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area
Impervious surface area
Percent impervious
Rational C coefficient
Peak flow from the 1 in/hr storm
Time of concentration
Rainfall intensity, 10-yr storm
Peak flow from the 10-yr storm
n/a
fe
fe
cfs
min
in/hr
cfs
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Where Does the Level Spreader Discharge?
To a grassed bioretention cell?
To a mulched bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
Width of dense ground cover
Width of wooded vegetation
Total width
Elevation at downslope base of level lip
Elevation at top of bank of the receiving water
Slope (from level lip to to top of bank)
Are any draws present?
Level Spreader Design
Forebay surface area
Feet of level lip needed per cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm?
Length based on the 10-yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
Length of the level lip
Are level spreaders in series?
n/a
(Y or N)
(Y or N)
(Y or N)
(Y or N)
30.00 ft
0.00 ft
0.00 ft
30.00 ft
730.00 fmsl
728.00 fmsl
6.67 %
N (Y or N)
n/a
sq ft
13 ft/cfs
(Y or N)
(Y or N)
(Y or N)
cfs
(Y or N)
ft
(Y or N)
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Note: Vacum Sweeping is being used
OK
No forebay is needed.
Bypass Channel Design (if applicable) n/a
Does the bypass discharge through a wetland? (Y or N)
Does the channel enter the stream at an angle? (Y or N)
Dimensions of the channel (see diagram below):
M ft
B ft
W ft
y ft
Peak velocity in the channel during the 10-yr storm cfs
Channel lining material
•
•
•
•
•
•
•
•
•
Akv-i

NCO" f Wnip
A
n'
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)!
I. PRO,lECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel
Contact name Ron Gieger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number V2A
II. DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP nla
Type of BMP dacuum Sweeping
Drawdown flow from the BMP n/a cfs
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area
Impervious surface area
Percent impervious
Rational C coefficient
Peak flow from the 1 in/hr storm
Time of concentration
Rainfall intensity, 10-yr storm
Peak flow from the 10-yr storm
Where Does the Level Spreader Discharge ?
To a grassed bioretention cell?
To a mulched bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
Width of dense ground cover
Width of wooded vegetation
Total width
Elevation at downslope base of level lip
Elevation at top of bank of the receiving water
Slope (from level lip to to top of bank)
Are any draws present?
nla
fe
fe
cfs
min
in/hr
cfs
n/a
(Y or N)
(Y or N)
(Y or N)
(Y or N)
nla
30.00 ft
0.00 ft
0.00 ft
30.00 ft
725.00 fmsl
724.00 fmsl
3.33 %
N (Y or N)
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Note: Vacum Sweeping is being used
OK
OK
Level Spreader Design
Forebay surface area
Feet of level lip needed per cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm?
Length based on the 10-yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
Length of the level lip
Are level spreaders in series?
n/a
sq ft
13 ft/cfs
(Y or N)
(Y or N)
(Y or N)
cfs
(Y or N)
ft
(Y or N)
No forebay is needed.
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material
nla
(Y or N)
(Y or N)
ft
ft
ft
ft
cfs
AVA
MCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)!
G
I. PROJECT INFORMATION
Project name a ?a3.d faiiei
Contact name Ron Gieger
Phone number 704338-6825
Date September 15, 2008
Drainage area number V26
II. DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP n/a
Type of BMP Vacuum Sweeping
Drawdown flow from the BMP n/a cis
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area
Impervious surface area
Percent impervious
Rational C coefficient
Peak flow from the 1 in/hr storm
Time of concentration
Rainfall intensity, 10-yr storm
Peak flow from the 10-yr storm
Where Does the Level Spreader Discharge ?
To a grassed bioretention cell?
To a mulched bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
Width of dense ground cover
Width of wooded vegetation
Total width
Elevation at downslope base of level lip
Elevation at top of bank of the receiving water
Slope (from level lip to to top of bank)
Are any draws present?
Level Spreader Design
Forebay surface area
Feet of level lip needed per cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm?
Length based on the 10-yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
Length of the level lip
Are level spreaders in series?
n/a
fe
fe
cfs
min
in/hr
cfs
n/a
(Y or N)
(Y or N)
(Y or N)
(Y or N)
30.00 ft
0.00 ft
0.00 ft
30.00 ft
718.00 fmsl
716.50 fmsl
5.00 %
N (Y or N)
n/a
sq it
13 ft/cfs
(Y or N)
(Y or N)
(Y or N)
cfs
(Y or N)
ft
(Y or N)
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Note: Vacuum Sweeping is being used
OK
OK
No forebay is needed.
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material
n/a
(Y or N)
(Y or N)
ft
ft
ft
ft
cfs
03? G
FN
NyyEW Z
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)!
I. PROJECT INFORMATION
Project name CDIA MW Area Aest ui 2nd raraiiei
Contact name n Gieger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number V2C
II DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP
Type of BMP Vacuum Sweeping
Drawdown flow from the BMP n/a cfs
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area
Impervious surface area
Percent impervious
Rational C coefficient
Peak flow from the 1 in/hr storm
Time of concentration
Rainfall intensity, 10-yr storm
Peak flow from the 10-yr storm
n/a
ftz
ft?
cfs
min
in/hr
cfs
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Where Does the Level Spreader Discharge?
To a grassed bioretention cell?
To a mulched bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
Width of dense ground cover
Width of wooded vegetation
Total width
Elevation at downslope base of level lip
Elevation at top of bank of the receiving water
Slope (from level lip to to top of bank)
Are any draws present?
Level Spreader Design
Forebay surface area
Feet of level lip needed per cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm?
Length based on the 10-yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
Length of the level lip
Are level spreaders in series?
n/a
(Y or N)
(Y or N)
(Y or N)
(Y or N)
30.00 ft
0.00 ft
0.00 It
30.00 ft
707.00 imsl
705.00 fmsl
6.67 %
N - (Y or N)
n/a
sq ft
13 fucfs
(Y or N)
(Y or N)
(Y or N)
ds
(Y or N)
ft
(Y or N)
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Note: Vacum Sweeping is being used
OK
No forebay is needed.
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material
n/a
(Y or N)
(Y or N)
ft
ft
ft
ft
cfs
A?W?]?y
MCDENP.
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)!
? W?ipgO
I PROJECT INFORMATION
Project name ea We r c. no arallel
Contact name Ron Gieger
Phone number 704338-6825
Date September 15,2008
Drainage area number W
IL DESIGN INFf?Y4ATI0N
For Level Spreaders Receiving Flow From a BMP
Type of BMP Vacuum Sweeping
Drawdown flow from the BMP n/a cfs
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area
Impervious surface area
Percent impervious
Rational C coefficient
Peak flow from the 1 inthr storm
Time of concentration
Rainfall intensity, 10-yr storm
Peak flow from the 10-yr storm
Where Does the Level Spreader Discharge ?
To a grassed bioretention cell?
To a mulched bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
Width of dense ground cover
Width of wooded vegetation
Total width
Elevation at downslope base of level lip
Elevation at top of bank of the receiving water
Slope (from level lip to to top of bank)
Are any draws present?
Level Spreader Design
Forebay surface area
Feet of level lip needed per cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm?
Length based on the 10-yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
Length of the level lip
Are level spreaders in series?
n/a
ftz
ftz
cfs
min
in/hr
cfs
n/a
_ (Y or N)
(Y or N)
(Y or N)
(Y or N)
30.00 ft
0.00 ft
0.00 ft
30.00 ft
715.00 fmsl
711.00 fmsl
13.33 %
N (YorN)
n/a
sq It
13 ft/cfs
(Y or N)
(Y or N)
(Y or N)
cfs
(Y or N)
ft
(Y or N)
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Note: Vacum Sweeping is being used
Level spreaders must be placed in series.
OK
No forebay is needed.
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material
n/a
(Y or N)
(Y or N)
ft
ft
ft
ft
cfs
ArA-
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)!
I PROJECT INFORMATION
Project name MIA SWMP Area West of 2nd Parallel
Contact name Ron Gieger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number V8
II. D£SK'sN INFORMATION
For Level Spreaders Receiving Flow From a BMP nia
Type of BMP Vacuum Sweeping
Drawdown flow from the BMP n/a cfs
For Level Spreaders Receiving Flow from the Drainage Area n/a
Drainage area e
Impervious surface area fe
Percent impervious %
Rational C coefficient
Peak flow from the 1 in/hr storm cfs
Time of concentration min
Rainfall intensity, 10-yr storm in/hr
Peak flow from the 10-yr storm cis
Where Does the Level Spreader Discharge ?
To a grassed bioretention cell?
To a mulched bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
Width of dense ground cover
Width of wooded vegetation
Total width
Elevation at downslope base of level lip
Elevation at top of bank of the receiving water
Slope (from level lip to to top of bank)
Are any draws present?
Level Spreader Design
Forebay surface area
Feet of level lip needed per cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm?
Length based on the 10-yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
Length of the level lip
Are level spreaders in series?
n/a (Y or N)
nia (Y or N)
nla (Y or N)
n/a (Y or N)
n/a
30.00 ft
0.00 ft
0.00 ft
30.00 ft
735.00 fmsl
731.00 fmsl
13.33 %
N` (Y or N)
n/a
sq ft
13 ft/cfs
(Y or N)
(Y or N)
(Y or N)
cfs
(Y or N)
ft
(Y or N)
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Note: Vacum Sweeping is being used
Level spreaders must be placed in series.
OK
No forebay is needed.
Bypass Channel Design (if applicable) n/a
Does the bypass discharge through a wetland? (Y or N)
Does the channel enter the stream at an angle? (Y or N)
Dimensions of the channel (see diagram below):
M ft
B ft
W ft
y ft
Peak velocity in the channel during the 10-yr storm cfs
Channel lining material
CDIA SWMP
Area West of 2nd Parallel Runway
Filter StriD Worksheet
September 15, 2008
HDR Engineering, Inc
of the Carolinas
ID # Sub-Basin
ID Drainage
Area Ac. Impervious
Area Ac. Minimum
Length Ft. Plan
Length Ft. Results
V1 V1ABCD 13.49 8.8 879.0 3486 Good
V2 V2A 5.32 3.7 373.0 1428 Good
V2 V213 7.32 4.8 475.8 2282 Good
V2 V2C 5.07 3.6 360.3 1317 Good
V3 Ms 1.16 1.0 97.0 330 Good
V4 V4n 1.86 1.09 109.4 615 Good
V4 V4s 1.88 1.23 123.0 654 Good
V5 V5n 2.11 1.26 125.7 653 Good
V5 V5s 1.99 1.27 126.9 653 Good
V6 V6s 1.08 0.72 71.9 311 , Good
V7 V7 3.18 2.0 202.0 1000 Good
V8 V8 3.01 2.0 195.0 1000 Good
Note:
All other Filter Strips on this project have been previously approved
by DWQ in March 2007, and therefore worksheets are not included.
CDIA SWMP Area West of 2nd Parallel Runway
October 15, 2008
Grass Swale Design Analysis for Wallace Neel Road
A comparative analysis was performed for the roadside ditches along Wallace Neel Road for
qualification as a water quality grass swale. A comparison was made between the guidance
provided in the NC BMP Manual and the actual design section proposed by the Roadway
design engineer. Space limitations along the road corridor have limited the back slope of the
swale to be greater than 5:1. To increase the effectiveness of pollutant removal along
Wallace Neel Road, grass swales were considered along both sides of the pavement. The
effectiveness of a grass swale in reducing pollutants is a function of the velocity and the
wetted perimeter of the channel cross section. The installed swale is trapezoidal in cross
section.
The grass swale side slope next to the Wallace Neel Road pavement is 6:1. The swale bottom
width is 2 ft and the back slope is 3:1. In comparison to the DWQ design standard, the grass
swale required side slopes are 5:1 with a 2 ft base width. For the purpose of this analysis,
sample calculations for basin area "KOIAs" have been provided displaying the design wetted
perimeter and velocities.
The 10-year peak flow for this section of road is 3.96 cfs. The velocity of the proposed ditch
section was evaluated using Manning's equation. The grass swale is designed with
roughness of a dense cover of Fescue grass (Manning's "n" = 0.035). The longitudinal slope
of the swale is 3.4%. The velocity calculated is 3.1 fps. Additionally, the wetted perimeter
for KOIAs of 5.32 ft was determined.
Utilizing the same flow and longitudinal slope for KOIAs, and using the BMP Manual's
suggested section, the velocity calculated was 3.0 fps, a difference of 0.10 fps. The wetted
perimeter is 5.57 ft a difference of 0.25 ft.
As a result of potential high velocities in either case, check dams will be required. Once
check dams are installed the flow pattern from the road into the ditch turns to a varied flow
condition, thereby requiring a different calculation methodology to examine velocity and set
the spacing of the check dams. To account for this varied flow condition, and to identify the
location of the first check dam, an iterative process was used to find the location of the check
dam that produces 1 fps velocity over the check dam. A drainage area of 0.14 acres produces
a velocity of 1 fps, therefore; the first check dam will start at 250 ft from the crest of the grass
swale. Additional check dams downstream will be required as additional drainage enters the
swale. To account for this, additional check dams will be placed in 150 ft incremental lengths
from the placement of the first check dam through out the rest of the grass swale. This
methodology holds for all road sections in question given the weir equation does not take
into account slope, and therefore each section of road drainage will have the first check dam
placed 250 feet from the start of the Swale, and subsequent check dams will be placed 150
feet apart.
Attachments to this design memo include sketches of the two ditch sections, velocity
calculations, and supporting data on check dam performance.
HDR Engineering 1
Permit No:
(to be assigned by DWQ)
III. 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.
. JGC SWMP 1. Plans (1" = 50' or larger) of the entire site showing:
pgs:1-5, 8-11 - Design at ultimate build-out,
- Off-site drainage (if applicable),
• - Delineated drainage basins (include Rational C coefficient per basin),
• - Swale dimensions (width, length, depth),
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
• - Grass species, and
• - Boundaries of drainage easement.
• JGC RW SWMP 2. Plan details (1" = 50' or larger) for the grassed swale showing:
• pgs: 3,14 - Swale dimensions (width, length, depth),
- Maintenance access,
- Proposed drainage easement and public right of way (ROW),
. - Design at ultimate build-out,
• - Grass species,
- Off-site drainage (if applicable),and
- Boundaries of drainage easement.
• JGC RW SWMP pgs: 3. Section view of the grassed swale (1" = 20' or larger) showing:
Typ: 3 - Side slopes,
Profile:8 -11 - Longitudinal slope,
• Typ:14 - Freeboard
• Profile: 20 - 24 - Swale dimensions, and
- SHWT level(s)
JGC See 2nd pg of 4. Supporting calculations (including maximum velocity calculations for applicable storms)
• this section
• JGC See 0 & M 5. A copy of the signed and notarized operation and maintenance (0&M) agreement.
section
JGC N/A 6. A copy of the deed restrictions (if required).
• SW401-Grassed Swale-Rev.3 Part III, Page 1 of 1
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CDIA SWMP
Area West of 2nd Parallel Runway
October 15, 2008
HDR Engineering, Inc.
of the Carolinas
Velocity Calculations for K01As in the Grass Swale
K01As Design section
Front Slope Base Back Slope
6 :1 2 3 :1
L Up h Dwn h delta h i
ft ft ft ft ft/ft
1,100 732.00 695 37.00 0.0336 Qdesign = 3.96
Manning's Equation
Q v B Y z A n P R
cfs fps ft ft sq ft Grass ft
1.41 2.3 2 0.21 4.5 0.6 0.035 3.94 0.16
2.11 2.6 2 0.26 4.5 0.8 0.035 4.40 0.19
2.96 2.8 2 0.31 4.5 1.1 0.035 4.86 0.22
5.18 3.3 2 0.41 4.5 1.6 0.035 5.78 0.27
6.55 3.5 2 0.46 4.5 1.9 0.035 6.24 0.30
8.11 3.7 2 0.51 4.5 2.2 0.035 6.70 0.33
K01As suggested sections
Front Slope Base Back Slope
5 :1 2 5 :1
K01As
L Up h Dwn h delta h i
ft ft ft ft ft/ft
1,100 732.00 695 37.00 0.0336 Qdesisn = 3.96
Manning's Equation
Q v B Y z A n P R
cfs fps ft ft sq ft Grass ft
1.31 2.2 2 0.20 5 0.6 0.035 4.04 0.15
2.01 2.5 2 0.25 5 0.8 0.035 4.55 0.18
2.87 2.7 2 0.30 5 1.1 0.035 5.06 0.21
3.91 3.0 2 0.35 5 1.3 0.035 5.57 0.24
5.13 3.2 2 0.40 5 1.6 0.035 6.08 0.26
6.55 3.4 2 0.45 5 1.9 0.035 6.59 0.29
8.17 3.6 2 0.50 5 2.3 0.035 7.10 0.32
CDIA SWMP October 15, 2008
Area West of 2nd Parallel Runway HDR Engineering, Inc.
of the Carolinas
Velocity Calculations for K01As using 1/4 the Drainage Area
K01As
Front Slope Base Back Slope
6 :1 2 3 :1
L Up h Dwn h delta h i
ft ft ft ft ft/ft
1,100 732.00 695 37.00 0.0226 Qdesign - 2 1/2 the area
1.33 1/3 the area
0.98 1/4 the area
Manning's Equation
Q v B Y Z A n P R
cfs fps ft ft sq ft Grass ft
0.55 1.5 2 0.14 4.5 0.4 0.035 3.29 0.11
0.96 1.8 2 0.19 4.5 0.5 0.035 3.75 0.14
1.48 2.0 2 0.24 4.5 0.7 0.035 4.21 0.18
2.13 2.2 2 0.29 4.5 1.0 0.035 4.67 0.21
2.91 2.4 2 0.34 4.5 1.2 0.035 5.13 0.23
3.83 2.6 2 0.39 4.5 1.5 0.035 5.60 0.26
4.90 2.8 2 0.44 4.5 1.8 0.035 6.06 0.29
Velocity over Weir
L 6.5 ft Top of weir length
Cw 3 Broad crested weir flow coefficient
Qdesign = 0.98 cfs Drainage/Channel flow
Z 4.5 :1 Average Side Slope (6+3)/2
Q V H A
0.71 0.92 0.11 0.77 A Trapezoidal water area calculations over the weir
0.97 1.01 0.14 0.96 H Height of water over the weir
1.25 1.08 0.16 1.16
1.55 1.14 0.19 1.36
1.88 1.20 0.21 1.56
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Permit Number:
(to be provided by DWQ)
5
NCO"
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number F01Aw

111, DESIGN INFORMATION . .
Site Characteristics
Drainage area 88,368.30 ft'
Impervious area 19,602.00 f?
Percent impervious 22.2%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 3.15 ft3/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter Y below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes
Swale length ft
Option 2: Conveyance Swale Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 ft/sec
Side slopes 5.00 :1
Swale length 1,200.00 ft
Form SW401-Grassed Swale-Rev.3
OK
OK
OK
Parts I and 11. Project Design Summary, Page 1 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x
2.00 ft
12.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
2.00 ft OK
703.50 fmsl
702.00 fmsl
700.00 fmsl
0.33% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and It. Project Design Summary, Page 2 of 62
Permit Number:
(to be provided by DWQ)
doe wnrEq `
l? o?o
NCDM
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I: PROJECT INFORMATION' ?, '
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number F01Ae
F' DESIGN INFORMATION
Site Characteristics
Drainage area 119,476.83 ff
Impervious area 19,602.00 ft
Percent impervious 16.4%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 3.15 ft3/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter "x" below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes
Swale length ft
Option 2: Conveyance Swale Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 fUsec OK
Side slopes 5.00 :1 OK
Swale length 1,200.00 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 3 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x;
2.00 ft
12.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
2.00 ft OK
703.50 fmsl
702:00 fmsl
700.00 fmsl
0.33% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and 11. Project Design Summary, Page 4 of 62
•
•
•
•
Permit Number:
(to be provided by DWQ)
??f WAT?
O
G
ATA
NW'ENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number F01 Bnw
II; DE51GN INFORMATION . _:, .
Site Characteristics
Drainage area 23,073.66 fe
Impervious area 8,058.60 ft
Percent impervious 34.9%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 1.30 ft3/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) X
Grass Type (enter Y below)
Bermuda
Tall fescue X
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes 1
Swale length ft
Option 2: Conveyance Swale, Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 ft/sec
Side slopes 5.00 :1
Swale length 500.00 ft
Form SW401-Grassed Swale-Rev.3
OK
OK
OK
Parts 1 and II. Project Design Summary, Page 5 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal x
Parabolic
V-shaped
Width of the bottom of the Swale 2.00 ft
Width of the top of the Swale 12.00 ft
Additional Information
Is the swale sized for all runoff from ultimate build-out? Y (Y or N) Insufficient sizing
Is the BMP located in a proposed drainage easement with a recorded Y (Y or N) Insufficient ROW location.
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT? 2.00 ft OK
What is the ground level elevation? 700.50 fmsl
What is the elevation of the bottom of the swale? 699.00 fmsl
What is the SHWT elevation? 697.00 fmsl SHWT not found in Boring Logs
What is the longitudinal slope of the swale? 0.60% OK
What is the depth of freeboard? 0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 6 of 62
Permit Number:
(to be provided by DWQ)
F
AV ?c
HcVGw
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT INFORMATION '
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number F01 Bne

It. DESIGN INFORMATION
Site Characteristics
Drainage area 72,594.26 ft
Impervious area 8,058.60 fe
Percent impervious 11.1% %
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 1.30 ft3/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 fUsec
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter Y below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes 1
Swale length ft
Option 2: Conveyance Swale, Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 ft/sec
Side slopes 5.00 :1
Swale length 500.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 7 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the Swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x
2.00 ft
12.00 ft
Y (Y or N)
Y (Y or N)
2.00 ft
700.50 fmsl
699.00 fmsl
697.00 fmsl
0.60%
0.50 ft
Insufficient sizing
Insufficient ROW location.
OK
SHWT not found in Boring Logs
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and 11. Project Design Summary, Page 8 of 62
Permit Number:
(to be provided by DWQ)
pf WATcw
AAWA
"ME
o??O
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number F01 Bsw

II. DESIGN INFORMATION
"
Site Characteristics
Drainage area 18,070.25 ftz
Impervious area 7,840.80 ft
Percent impervious 43.4%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 1.26 ft3/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter "x" below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes :1
Swale length ft
Option 2: Conveyance Swale, Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 ft/sec
Side slopes 5.00 :1
Swale length 490.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and 11. Project Design Summary, Page 9 of 62
Permit Number.
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the Swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
X
2.00 ft
12.00 ft
Y (Y or N)
Y (Y or N)
2.00 ft
700.50 fmsl
699.00 fmsl
697.00 fmsl
2.24%
0.50 ft
Insufficient sizing
Insufficient ROW location.
OK
SHWT not found in Boring Logs
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 10 of 62
Permit Number:
(to be provided by DWQ)
a??F w?rfa `
HCDM
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number F01 Bse
IL DE51GN'INFORMATION,"
Site Characteristics
Drainage area 58,258.74 flz
Impervious area 7,840.80 fC
Percent impervious 13.5%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 1.26 ft3/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter Y below)
Bermuda
Tall fescue X
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes 1
Swale length ft
Option 2: Conveyance Swale Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 ft/sec OK
Side slopes 5.00 :1 OK
Swale length 490.00 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 11 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x
2.00 ft
12.00 ft
Y (Y or N)
Y (Y or N)
2.00 ft
700.50 fmsl
699.00 fmsl
697.00 fmsl
2.24%
0.50 ft
Insufficient sizing
Insufficient ROW location.
OK
SHWT not found in Boring Logs
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 12 of 62
Permit Number:
(to be provided by DWQ)
A
?nF W A TfA ff,?..
p? t
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required
information.
I; PROJECT *1 0RMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-388-6825
Date September 8, 2008
Drainage area number 9/1512008
II. DESIGN INFORMATION
Site Characteristics
Drainage area 21,379.80 ft
Impervious area 16,117.20 ftz
Percent impervious 75.4%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.02 in/hr
Post-development 10-yr storm peak flow 2.59 ft'/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter 'x' below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter 'x' below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes
Swale length
Option 2: Conveyance Swale Seeking Pollutant Credit:
Maximum velocity for 10-yr storm
Side slopes
Swale length
:1
ft
y (Y or N)
1.00 ft/sec OK
5.00 :1 OK
728.00 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and H. Project Design Summary, Page 13 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal x
Parabolic
V-shaped
Width of the bottom of the swale 2.00 ft
Width of the top of the Swale 10.00 ft
Additional Information
Is the swale sized for all runoff from ultimate build-out? Y (Y or N) Insufficient sizing
Is the BMP located in a proposed drainage easement with a Insufficient ROW
recorded access easement to a public Right of Way (ROW)? Y (Y or N) location.
What is the distance from the bottom of the swale to the SHWT? 36.30 It OK
What is the ground level elevation? 717.00 fmsl
What is the elevation of the bottom of the swale? 715.50 fmsl
What is the SHWT elevation? 679.20 fmsl
What is the longitudinal slope of the swale? 0.62 % OK
What is the depth of freeboard? 0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts 1 and H. Project Design Summary, Page 14 of 62
Permit Number:
(to be provided by DWQ)
c?1r o~
MCKM
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required
information.
L 'PROJECT INFORMATION
Project name CDIA GIMP Area "lest of 2nd Parallel Ru."ay
Contact name Ron Geiger
Phone number 704-388-6825
Date September 15, 2008
Drainage area number G01aE
IL DESIGNJNFORMATION
Site Characteristics
Drainage area 33,645.17 ftz
Impervious area 16,117.20 fe
Percent impervious 0.48%
Design rainfall depth 1 inch
Peak Flow Calculations 2JU
10-yr storm runoff depth 4.81 in
10-yrstorm intensity 0.02 in/hr
Post-development 10-yr storm peak flow 2.59 fOlsec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.5 fUsec
Soil characteristics (enter Y below)
Sand/sift (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter Y below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity 5.50
Side slopes 5.00 1
Swale length 728 ft
Option 2: Conveyance Swale, Seeking Pollutant Credit: y (Y or N)
Maximum velocity for 10-yr storm 1.00 fUsec OK
Side slopes 5.00 :1 OK
Swale length 728 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 15 of 62
Permit Number.
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal z
Parabolic
V-shaped
Width of the bottom of the swale 2.00 It
Width of the top of the swale loft
Additional Information
Is the Swale sized for all runoff from ultimate build-out? Y (Y or N)
Is the BMP located in a proposed drainage easement with a

recorded access easement to a public Right of Way (ROW)? Y (Y or N)
What is the distance from the bottom of the swale to the

SHWT? 36.30 ft
What is the ground level elevation? 717.00 fmsl
What is the elevation of the bottom of the swale? 715.50 fmsl
What is the SHWT elevation? 679.20 fmsl
What is the longitudinal slope of the swale? 0.62%
What is the depth of freeboard? 0.5 ft
Insufficient sizing
Insufficient ROW
location.
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 16 of 62
Permit Number:
(to be provided by DWQ)
.. ??4 W{fqg
HCD"
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required
information.
1 PROJECT INFORTION -
Project name GDIA SWP.1P Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number H01 aW
II. DESIGN INFO TION - -
Site Characteristics
Drainage area 30,803.47 fly
Impervious area 20,037.60 fe
Percent impervious 0.65%
Design rainfall depth 1 inch
Peak Flow Calculations
10-yr storm runoff depth
10-yr storm intensity
Post-development 10-yr storm peak flow
Velocity
Maximum non-erosive velocity (peak 10-year storm)
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant)
Grass Type (enter "x" below)
Bermuda
Tall fescue
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
Option 2: Conveyance Swale, Seeking Pollutant Credit
Maximum velocity for 10-yr storm
Side slopes
Swale length
4.28 in
0.02 in/hr
3.92 ft3lsec
5.5 ft/sec
x
Y
n (Y or N)
(t
Y (Y or N)
1.00 ft/sec OK
5.00 :1 OK
1200 It OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 17 of 62
Permit Number.
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal x
Parabolic
V-shaped
Width of the bottom of the swale 2.00 ft
Width of the top of the swale 12 ft
Additional Information
Is the swale sized for all runoff from ultimate build-out? Y (Y or N) Insufficient sizing
Is the BMP located in a proposed drainage easement with a Insufficient ROW
recorded access easement to a public Right of Way (ROW)? Y (Y or N) location.
What is the distance from the bottom of the swale to the

SHWT? 50.40 ft OK
What is the ground level elevation? 711.00 fmsl
What is the elevation of the bottom of the swale? 709.50 fmsl
What is the SHWT elevation? 659.10 fmsl
What is the longitudinal slope of the swale? 0.50% OK
What is the depth of freeboard? 0.5 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 18 of 62
Permit Number:
(to be provided by DWQ)
orOF W A lfyOG
AAG"Ah
HWEHR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
L PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway -
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number H01aE
111. DESIGN INFO ATION -
Site Characteristics
Drainage area 136,035.23 ft2
Impervious area 20,037.60 fe
Percent impervious 14.7%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.28 in
10-yr storm intensity 0.02 in/hr
Post-development 10-yr storm peak flow 3.92 fO/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter "x" below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes 1
Swale length ft
Option 2: Conveyance Swale Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 ft/sec OK
Side slopes 5.00 :1 OK
Swale length 1,200.00 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 19 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x'
2.00 ft
12.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
50.40 ft OK
711.00 fmsl
709.50 fmsl
659.10 fmsl
0.50% OK
0.50 It OK
Form SW401-Grassed Swale-Rev.3 Parts I and H. Project Design Summary, Page 20 of 62
Permit Number:
(to be provided by DWQ)
?Op W ATE c
AT o
HCDM
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I, PkOJECT INF MATION
Project name CDIA SWNiP Area4est of 2nd Paialiel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number H01 bnW
IL-DESIGN INFOR TION `
Site Characteristics
Drainage area 21,595.57 ft
Impervious area 13,002.66 fe
Percent impervious 60.2%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth
10-yr storm intensity
Post-development 10-yr storm peak flow
Velocity
Maximum non-erosive velocity (peak 10-year storm)
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant)
Grass Type (enter Y below)
Bermuda
Tall fescue
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
motion 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
ODtlon 2: Convevance Swale, Seekinq Pollutant Credit:
Maximum velocity for 10-yr storm
Side slopes
Swale length
4.81 in
0.20 in/hr
2.09 ft3/sec

5.50 ft/sec

x

x

n (Y or N)
:1
ft
y (Y or N)
1.00 ft/sec
5.00 :1
700.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 21 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x
2.00 ft
12.00 ft
Y (Y or N)
Y (Y or N)
46.90 ft
707.50 fmsl
706.00 fmsl
659.10 fmsl
0.50%
0.50 ft
Insufficient sizing
Insufficient ROW location
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 22 of 62
Permit Number:
(to be provided by DWQ)
?pF WA;FH L
HWENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number H01 bnE
II. DESIGN INFO ATION ;
Site Characteristics
Drainage area 93,112.92 fl?
Impervious area 13,002.66fe
Percent impervious 14.0%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 2.09 ft'/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter Y below)
Bermuda
Tall fescue X
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity 4.50
Side slopes 5.00 :1
Swale length 420.00 ft
Option 2: Conveyance Swale. Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 fUsec
Side slopes 5.00 :1
Swale length 700.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and 11. Project Design Summary, Page 23 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
x
2.00 ft
12.00 ft
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the Swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the Swale?
What is the depth of freeboard?
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
46.90 ft OK
707.50 fmsl
706.00 fmsl
659.10 fmsl
0.50 %a OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 24 of 62
Permit Number.
(to be provided by DWQ)
? CF wsrF9 g
HCOEM
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part ill) must also be filled out, printed and submitted along with all of the required information.
C PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number H01 bsW
11 DESIGN INFORMATION
Site Characteristics
Drainage area 47,748.19 ftz
Impervious area 13,068.00 ft
Percent impervious 27.4%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth
10-yr storm intensity
Post-development 10-yr storm peak flow
Velocity
Maximum non-erosive velocity (peak 10-year storm)
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant)
Grass Type (enter "x" below)
Bermuda
Tall fescue
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
ODtion 2: Convevance Swale, Seekin4 Pollutant Credit:
Maximum velocity for 10-yr storm
Side slopes
Swale length
4.81 in
0.20 in/hr
1.70 ft'/sec
x
5.50 ft/sec
n (Y or N)
:1
ft
y (Y or N)
1.00 fUsec
5.00 :1
750.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 25 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal x
Parabolic
V-shaped
Width of the bottom of the swale 2.00 ft
Width of the top of the swale 12.00 ft
Additional Information
Is the swale sized for all runoff from ultimate build-out? Y (Y or N) Insufficient sizing
Is the BMP located in a proposed drainage easement with a recorded Y (Y or N) Insufficient ROW location.
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT? 21.10 ft OK
What is the ground level elevation? 707.50 fmsl
What is the elevation of the bottom of the swale? 706,00 fmsl
What is the SHWT elevation? 684.90 fmsl
What is the longitudinal slope of the swale? 1.07% OK
What is the depth of freeboard? 0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 26 of 62
Permit Number:
(to be provided by DWQ)
o?cF wR rEgoc
HCDM
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
L PROJECT INFORMATION
Project name CD A SWMP Area West of 2nd Paraliei Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number H01 bsE
II, DESI INFORMATION;'
Site Characteristics
Drainage area 105,282.83 ftz
Impervious area 13,068.00 fe
Percent impervious 12.4%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth
10-yr storm intensity
Post-development 10-yr storm peak flow
Velocity
Maximum non-erosive velocity (peak 10-year storm)
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant)
Grass Type (enter Y below)
Bermuda
Tall fescue
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
Option 2: Convevance Swale, Seeking Pollutant Credit:
Maximum velocity for 10-yr storm
Side slopes
Swale length
4.81 in
0.20 inthr
1.70 ft3/sec
Y
5.50 ft/sec
n (Y or N)
:1
ft
y (Y or N)
1.00 ft/sec
5.00 :1
750.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 27 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x
2.00 ft
12.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
21.10 ft OK
707.50 fmsl
706.00 fmsl
684.90 fmsl
1.07% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 28 of 62
Permit Number:
(to be provided by DWQ)
?pp W A?Fq
AAWA
a?OS
MCD"
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part Ill) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT FORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number K01 anW
IL DESIGN INFORMATION
Site Characteristics
Drainage area 86,543.15 ftz
Impervious area 18,077.40 ftz
Percent impervious 20.9%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 2.91 f0/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 fUsec
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter "x" below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes 1
Swale length ft
Option 2: Conveyance Swale, Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 ft/sec
Side slopes 5.00 :1
Swale length 1,000.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and H. Project Design Summary, Page 29 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal x
Parabolic
V-shaped
Width of the bottom of the Swale 2,00 ft
Width of the top of the swale 12.00 It
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
10.10 ft OK
696.50 fmsl
695.00 fmsl
684.90 fmsl
1.10% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and 11. Project Design Summary, Page 30 of 62
Permit Number:
(to be provided by DWQ)
woe wnrey
?
c
ASIA
NCO"
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
L PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number K01 anE
II. DESIGN I .ORMATI ;.
Site Characteristics
Drainage area 154,115.95 ftz
Impervious area 18,077.40 fe
Percent impervious 117%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth
10-yr storm intensity
Post-development 10-yr storm peak flow
Velocity
Maximum non-erosive velocity (peak 10-year storm)
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant)
Grass Type (enter "x" below)
Bermuda
Tall fescue
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
Option 2: Convevance Swale, Seekin4 Pollutant Credit:
Maximum velocity for 10-yr storm
Side slopes
Swale length
4.81 in
0.20 in/hr
2.91 ft3/sec
5.50 ft/sec
x
X
n (Y or N)
:1
ft
y (Y or N)
1.00 fUsec
5.00 :1
1,000.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and 11. Project Design Summary, Page 31 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x
2.00 ft
12.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
10.10 ft OK
696.50 fmsl
695.00 fmsl
684.90 fmsl
1.10% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 32 of 62
Permit Number:
(to be provided by DWQ)
- pF W?TFN
o?OT
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
L PR JECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number K01asW
11, DESIGN INFORMATION _,. ., ..
Site Characteristics
Drainage area 67,754.83 fe
Impervious area 24,611.40 ftz
Percent impervious 36.3%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 3.96 W/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter Y below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes :1
Swale length ft
Option 2: Conveyance Swale, Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 ft/sec
Side slopes 5.00 :1
Swale length 1,100.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 33 of 62
Permit Number.
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x
2.00 ft
12.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
10.10 ft OK
696.50 fmsl
695.00 fmsl
684.90 fmsl
3.36% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 34 of 62
Permit Number.
(to be provided by DWQ)
?p?f VlAT? l
AAWA
O? rJ O
MCD"
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be rifled out, printed and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number K01asE
IL DESIGN FORMATION. .
Site Characteristics
Drainage area 83,549.94 fe
Impervious area 24,611.40 ft
Percent impervious 29.5%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 3.96 ft3/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter "x' below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes :1
Swale length ft
Option 2: Conveyance Swale, Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 ft/sec
Side slopes 5.00 :1
Swale length 1,100.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev. 3 Parts I and II. Project Design Summary, Page 35 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal x
Parabolic
V-shaped
Width of the bottom of the swale 2.00 ft
Width of the top of the swale 12.00 ft
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
Y (Y or N)
Y (Y or N)
IU.1Utt
696.50 fmsl
695.00 fmsl
684.90 fmsl
3.36%
0.50 ft
Insufficient sizing
Insufficient ROW location
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and H. Project Design Summary, Page 36 of 62
Permit Number:
(to be provided by DWQ)
:`????{.?w?a ? FYJAT?
??
MCKM
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must also be filled out, printed and submitted along with all of the required information.
L PROJECTI FORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number L01Aw
II: DESIGN INFORMATION
Site Characteristics
Drainage area 6,371.88 ft2
Impervious area 6,098.40 fe
Percent impervious 95.7%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth
10-yr storm intensity
Post-development 10-yr storm peak flow
Velocity
Maximum non-erosive velocity (peak 10-year storm)
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant)
Grass Type (enter Y below)
Bermuda
Tall fescue
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
Option 2: Conveyance Swale, Seekinq Pollutant Credit:
Maximum velocity for 10-yr storm
Side slopes
Swale length
4.81 in
0.20 in/hr
0.98 ft3/sec
Y
X
5.50 ft/sec
n (Y or N)
:1
ft
y (Y or N)
1.00 ft/sec
5.00 :1
320.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 37 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
x
2.00 ft
12.00 ft
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
arracc aacamr?nt to n niihlir. Rinht of Wnv (Rnw)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
47.60 ft OK
734.00 fmsl
732.50 fmsl
684.90 fmsl
0.78% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 38 of 62
Permit Number:
(to be provided by DWQ)
?WAr? L
AGA - f?05
MCM.M
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT FORMATION {"
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number L01Ae
111, DESIGN INFORMATION
Site Characteristics
Drainage area 10,821.20 fe
Impervious area 6,098.40 e
Percent impervious 56.4%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 0.98 ft3/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter Y below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes :1
Swale length It
Option 2: Conveyance Swale, Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 ftisec
Side slopes 5.00 :1
Swale length 320.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts 1 and II. Project Design Summary, Page 39 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x
2.00 ft
12.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
47.60 ft OK
734.00 fmsl
732.50 fmsl
684.90 fmsl
0.78% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 40 of 62
Permit Number:
(to be provided by DWQ)
?OF •NArFq
o<
AAAAA
H
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number M01 aW
IL `?ESIGN INFOR TION
Site Characteristics
Drainage area 63,722.22 fe
Impervious area 22,433.40 fe
Percent impervious 35.2%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 3.61 ft3/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter "x" below)
Bermuda
Tall fescue X
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes
Swale length ft
Option 2• Conveyance Swale Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 fUsec
Side slopes 5.00 :1
Swale length 1,285.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 41 of 62
Permit Number.
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x
2.00 ft
12.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
29.60 ft OK
711.50 fmsl
710.00 fmsl
680.40 fmsl
1.95% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev. 3 Parts I and 11. Project Design Summary, Page 42 of 62
Permit Number:
(to be provided by DWQ)
o^., wwrF9o
o ~
AN o?G
P409H t
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number M01 aE
I1. DESIGN INFORMATION
Site Characteristics
Drainage area 62,054.46 ft
Impervious area 22,433.40 fe
Percent impervious 36.2%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 3.61 ft3/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter Y below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
Option 2: Convevance Swale, Seekinq Pollutant Credit_
Maximum velocity for 10-yr storm
Side slopes
Swale length
n (Y or N)
:1
ft
y (Y or N)
1.00 ft/sec
5.00 :1
1.285.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and 11. Project Design Summary, Page 43 of 62
Permit Number.
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an 'x' in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the Swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x'
2.00 ft
12.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
29.60 ft OK
711,50 fmsl
710.00 fmsl
680.40 fmsl
1,95% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and 11. Project Design Summary, Page 44 of 62
Permit Number:
(to be provided by DWQ)
of II t"q
o
AMA MD" E
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out printed and submitted along with all of the required information.
1. PROJ CT I FORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number V1A
II- DE N INFSRVATION,
Site Characteristics
Drainage area 135,369.85 flz
Impervious area 108,232.12 ftz
Percent impervious 80,0%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 18.13 ft3/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter Y below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes :1
Swale length ft
Option 2• Conveyance Swale Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 ft/sec
Side slopes 5.00 :1
Swale length 1,000.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and H. Project Design Summary, Page 45 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out? .
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x
3.uu n
13.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
17.00 ft OK
711.50 fmsl
710.00 fmsl
693.00 fmsl
2.20% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 46 of 62
Permit Number:
(to be provided by DWQ)
+1 ?j OF WRTE9
'i
H CD"
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT INFORMATION -
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number V113
II. DESIGN INFORtMATION
Site Characteristics
Drainage area 132422.4 fe
Impervious area 77543.42 fe
Percent impervious 58.6%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 12.46 ft3/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter "x" below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes :1
Swale length ft
Option 2: Conveyance Swale, Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 ft/sec
Side slopes 5.00 :1
Swale length 875.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 47 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x
3.00 " ft
13.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
14.00 ft OK
708.50 fmsl
707.00 fmsl
693.00 fmsl
0.46% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 48 of 62
Permit Number:
(to be provided by DWQ)
?pF W ATEN
CA a?O
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT INFORMATION '
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number Vic
II. DESIGN INFORMATION
Site Characteristics
Drainage area 108464.4 ft
Impervious area 61937.98 fe
Percent impervious 57.1 % %
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth
10-yr storm intensity
Post-development 10-yr storm peak flow
Velocity
Maximum non-erosive velocity (peak 10-year storm)
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant)
Grass Type (enter "x" below)
Bermuda
Tall fescue
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
Option 2: Conveyance Swale. Seeking Pollutant Credit:
Maximum velocity for 10-yr storm
Side slopes
Swale length
4.81 in
0.20 in/hr
9.95 ft3/sec

5.50 ft/sec

x

X

n (Y or N)

ft
y (Y or N)
1.00 ft/sec
5.00 .1
740.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 49 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
x'
3.00 ft
13.00 ft
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
9.00 ft OK
703.50 fmsl
702.00 fmsl
693.00 fmsl
1.08% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and It. Project Design Summary, Page 50 of 62
Permit Number:
(to be provided by DWQ)
Yp WATEq
F?
H .. o?O
CD"
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
L PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number V1 Dn

II. RE N INFORMATION
Site Characteristics
Drainage area 68389.2 ftz
Impervious area 40587.60 ftz
Percent impervious 593% %
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth 4.81 in
10-yr storm intensity 0.20 in/hr
Post-development 10-yr storm peak flow 14.49 ft3/sec
Velocity
Maximum non-erosive velocity (peak 10-year storm) 5.50 ft/sec
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant) x
Grass Type (enter Y below)
Bermuda
Tall fescue x
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale: n (Y or N)
Maximum velocity
Side slopes :1
Swale length ft
Option 2: Conveyance Swale, Seeking Pollutant Credit: Y (Y or N)
Maximum velocity for 10-yr storm 1.00 ft/sec
Side slopes 5.00 :1
Swale length 700.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 51 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x
3.00 ft
13.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
7.00 ft OK
701.50 fmsl
700.00 fmsl
693.00 fmsl
0.86% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 52 of 62
Permit Number:
(to be provided by DWQ)
of wat?y
.dAl A
? Y
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I... PROTECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number V1 Ds
IL DESIGN INFORMATION
Site Characteristics
Drainage area 142,876.80 ftz
Impervious area 84,513.10 ft2
Percent impervious 59.2%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth
10-yr storm intensity
Post-development 10-yr storm peak flow
Velocity
Maximum non-erosive velocity (peak 10-year storm)
Soil characteristics (enter "x" below)
Sand/silt (easily erodible)
Clay mix (erosion resistant)
Grass Type (enter "x" below)
Bermuda
Tall fescue
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
Option 2: Conveyance Swale. Seekina Pollutant Credit:
Maximum velocity for 10-yr storm
Side slopes
Swale length
4.81 in
0.20 in/hr
14.49 ft3/sec

5.50 ft/sec

x

X

n (Y or N)
:1
ft
y (Y or N)
1.00 fUsec
5.00 :1
700.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and 11. Project Design Summary, Page 53 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the Swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
3,00 ft
13.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
7.00 ft OK
701.50 fmsl
700.00 fmsl
693.00 fmsl
2.14% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and It. Project Design Summary, Page 54 of 62
Permit Number:
(to be provided by DWQ)
AGA
HCDM
coz?? 4
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part IIQ must also be filled out, printed and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number V07W
II. DESIGN I FORMATION
Site Characteristics
Drainage area 112,384.80 ft2
Impervious area 61,595.90 ft'
Percent impervious 54.8%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth
10-yr storm intensity
Post-development 10-yr storm peak flow
Velocity
Maximum non-erosive velocity (peak 10-year storm)
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant)
Grass Type (enter Y below)
Bermuda
Tall fescue
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
ODtlon 2: Convevance Swale. Seeking Pollutant Credit:
Maximum velocity for 10-yr storm
Side slopes
Swale length
4.81 in
0.20 in/hr
9.90 ft3/sec
5.50 ftisec
n (Y or N)
:1
ft
y (Y or N)
1.00 ft/sec
5.00 :1
832.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 55 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
3.00 ft
13.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
8.00 ft OK
702.50 fmsl
701.00 fmsl
693.00 fmsl
1.68% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and 11. Project Design Summary, Page 56 of 62
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Permit Number:
(to be provided by DWQ)
W5_
P WnT ASIA oSTORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
L PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number V7e
II. DESIGN NFORMATION
Site Characteristics
Drainage area 40,946.40 fe
Impervious area 26,474.67 ftZ
Percent impervious 64.7%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth
10-yr storm intensity
Post-development 10-yr storm peak flow
Velocity
Maximum non-erosive velocity (peak 10-year storm)
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant)
Grass Type (enter Y below)
Bermuda
Tall fescue
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
Option 2: Convevance Swale. Seekino Pollutant Credit:
Maximum velocity for 10-yr storm
Side slopes
Swale length
Form SW401-Grassed Swale-Rev.3
4.81 in
0.20 in/hr
4.25 ft3/sec

5.50 ft/sec

x

X

n (Y or N)
:1
it
y (Y or N)
1.00 ft/sec
5.00 :1
287.00 ft
OK
OK
OK
Parts I and It. Project Design Summary, Page 57 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
x
3.00 ft
13.00 ft
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
11.00 ft OK
705.50 fmsl
704.00 fmsl
693.00 fmsl
1.05% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and 11. Project Design Summary, Page 58 of 62
Permit Number.
(to be provided by DWQ)
J?^'? ?Qf WATpq
a`g
MCN-W
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
1. PROJECT RFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number V8w
I[, DESIGN INFOR ION -
Site Characteristics
Drainage area 98445.6 ft
Impervious area 48153.32 ft'
Percent impervious 48.9%%
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth
10-yr storm intensity
Post-development 10-yr storm peak flow
Velocity
Maximum non-erosive velocity (peak 10-year storm)
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant)
Grass Type (enter Y below)
Bermuda
Tall fescue
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
Option 2: Convevance Swale, Seekino Pollutant Credit:
Maximum velocity for 10-yr storm
Side slopes
Swale length
4.81 in
0.20 in/hr
8.75 ft3/sec

5.50 ftlsec

x

x

n (Y or N)
:1
ft
y (Y or N)
1.00 ft/sec
5.00 :1
770.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 59 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x
3.00 ft
13.00 ft
Y (Y or N) Insufficient sizing
Y (Y or N) Insufficient ROW location.
28.00 ft OK
722.50 fmsl
721.00 fmsl
693.00 fmsl
1.43% OK
0.50 ft OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 60 of 62
Permit Number:
(to be provided by DWQ)
:???? ?F W ATEq
O
•YVii` STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
GRASSED SWALE SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must also be filled out, printed and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name CDIA SWMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number V8e
Ill. DESIGN INFORMATION:
Site Characteristics
Drainage area 47916 fe
Impervious area 30540.72 ftz
Percent impervious 637% %
Design rainfall depth 1.00 inch
Peak Flow Calculations
10-yr storm runoff depth
10-yr storm intensity
Post-development 10-yr storm peak flow
Velocity
Maximum non-erosive velocity (peak 10-year storm)
Soil characteristics (enter Y below)
Sand/silt (easily erodible)
Clay mix (erosion resistant)
Grass Type (enter Y below)
Bermuda
Tall fescue
Bahiagrass
Kentucky bluegrass
Grass-legume mixture
Swale type: Fill out one of the options below:
Option 1: Curb Outlet Swale:
Maximum velocity
Side slopes
Swale length
Option 2: Conveyance Swale. Seekino Pollutant Credit:
Maximum velocity for 10-yr storm
Side slopes
Swale length
4.81 in
0.20 in/hr
4.91 ft3/sec

5.50 ft/sec

x

x

n (Y or N)
:1
ft
y (Y or N)
1.00 ft/sec
5.00 :1
335.00 ft
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 61 of 62
Permit Number:
(to be provided by DWQ)
Swale Characteristics
Swale Shape: Enter an Y in the appropriate cell below:
Trapezoidal
Parabolic
V-shaped
Width of the bottom of the swale
Width of the top of the swale
Additional Information
Is the swale sized for all runoff from ultimate build-out?
Is the BMP located in a proposed drainage easement with a recorded
access easement to a public Right of Way (ROW)?
What is the distance from the bottom of the swale to the SHWT?
What is the ground level elevation?
What is the elevation of the bottom of the swale?
What is the SHWT elevation?
What is the longitudinal slope of the swale?
What is the depth of freeboard?
x_
3.00 It
13.00 ft
Y (Y or N)
Y (Y or N)
28.00 ft
722.50 fmsl
721.00 fmsl
693.00 fmsl
1.79%
0.50 ft
Insufficient sizing
Insufficient ROW location.
OK
OK
OK
Form SW401-Grassed Swale-Rev.3 Parts I and II. Project Design Summary, Page 62 of 62
Permit No:
(to be assigned by DWQ)
III. 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.
Pagel Plan
Initials Sheet No.
JGC SWMP 14 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,
Proposed drainage easement and public right of way (ROW),
Clean out pipe locations,
Overflow device, and
Boundaries of drainage easement.
JGC SWMP 14 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.
JGC SWMP 14 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]
JGC
JGC
See this 4. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
section 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
P-index.
N/A 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.
JGC SWMP 14
JGC See this
section
JGC See0&M
section
JGC N/A
Form SW401-Bioretention-Rev.3
6. A construction sequence that shows how the bioretention cell will be protected from sediment until the
entire drainage area is stabilized.
7. The supporting calculations (including underdrain calculations, if applicable).
8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
9. A copy of the deed restrictions (if required).
Part III, Page 1 of 2

• Permit No:
(to be assigned by DWQ)
of W A TE,
??OY
•
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 CDIA SV`VMP Area West of 2nd Parallel Runway
Contact name Ron Geiger
Phone number 704-338-6825
Date September 15, 2008
Drainage area number Old Dowd Road A2

II. DESIGN INFORMATION

Site Characteristics
Drainage area 88,429.23 ft2
• Impervious area 64,193.00 ft2
Percent impervious 72.6% %
Design rainfall depth 1.00 inch
Peak Flow Calculations
• 1-yr, 24-hr runoff depth 2.77 in
1-yr, 24-hr intensity 0.12 in/hr
Pre-development 1-yr, 24-hr peak flow 8.90 ft3/sec
• Post-development 1-yr, 24-hr peak flow 17.70 ft3/sec
3
Pre/Post 1-yr, 24-hr peak control 8.80 ft
/sec
•
Storage Volume: Non-SR Waters
Design volume 7,083.77 ft3
• Storage Volume: SR Waters
Pre-development 1-yr, 24-hr runoff
3
ft
Post-development 1-yr, 24-hr runoff ft 3
• Minimum volume required ft 3
• Volume provided ft3
Cell Dimensions
Ponding depth of water 12.00 inches OK
• Ponding depth of water 1.00 ft
2
Surface area of the top of the bioretention cell OK
7200.00 ft
Length: 120.00 ft OK
• Width: 60.00 ft OK
-or- Radius ft

Soils Report Summary
• Drawdown time, ponded volume 8.00 hr OK
. Drawdown time, to 24 inches below surface 16.00 hr OK
Drawdown time, total: 24.00 hr
in-situ soil:
• Soil permeability 0.60 in/hr OK
Planting media soil:
• Soil permeability 1.50 in/hr OK
Soil composition
%u Sand (by weight) 85% OK
• % Fines (by weight) 10% OK
% Organic (by weight) 5% OK
Total: 100%
• Phosphorus Index (P-Index) 20 (unitless) OK
• Note: Phosphorous is not a concern in this area.
Form SW401-Bioretention-Rev.3 Part III, Page 1 of 2
Permit No:
(to be assigned by DWQ)
Basin Elevations
Temporary pool elevation 683.20 fmsl
Planting elevation (top of the mulch) 682.20 fmsl OK
Bottom of the cell 679.00 fmsl
Planting depth 3.20 ft
Depth of mulch 2.00 inches OK
SHWT elevation 669.00 fmsl OK
Are underdrains being installed? Y (Y or N)
How many clean out pipes are being installed? 8 OK
What factor of safety is used for sizing the underdrains? (See

BMP Manual Section 12.3.6) 2.00 OK
Additional distance between the bottom of the planting media and

the bottom of the cell to account for underdrains 1.00 ft
Bottom of the cell required 678.00 fmsl
Distance from bottom to SHWT 9.00 ft OK
Type of bioretention cell (answer "Y" to only one of the two following
questions):
Is this a grassed cell? Y (Y or N) OK
Is this a cell with trees/shrubs? N (Y or N)
Planting Plan
Number of tree species 0 More species are recommended.
Number of shrub species 0 More species are recommended.
Number of herbaceous groundcover species 1 More species are recommended.
Additional Information
Does volume in excess of the design volume bypass the Y (Y or N) OK
bioretention cell?
Does volume in excess of the design volume flow evenly distributed Y (Y or N) OK
through a vegetated filter?
What is the length of the vegetated filter? 40 ft
Does the design use a level spreader to evenly distribute flow? Y (Y or N) Submit a level spreader supplement.
Is the BMP located at least 30 feet from surface waters (50 feet if Y (Y or N) OK
SA waters)?
Is the BMP located at least 100 feet from water supply wells? Y (Y or N) OK
Are the vegetated side slopes equal to or less than 3:1? Y (Y or N) OK
Is the BMP located in a recorded drainage easement with a Y (Y or N) OK
recorded access easement to a public Right of Way (ROW)?
Inlet velocity (from treatment system) ft/sec
Is the area surrounding the cell likely to undergo development in the N (Y or N) OK
future?
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
(8inches gravel followed by 3-5 ft of grass) X

Grassed swale
N OK
Forebay N
Form SW401-Bioretention-Rev.3 Part III, Page 2 of 2
AGA,
MCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)I

PROJECT INFORMATION
Project name GDIA 6AMP Area Aesl of 2nd Paia6ei
Contact name Ron Gieger
Phone number 704338-6825
Date October 16, 2008
Drainage area number Old Dowd Road A2
II. DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP
Type of BMP
Drawdown flow from the BMP cfs
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area 88,429.23 e
Impervious surface area 64,193.00 fe
Percent impervious 72.59 %
Rational C coefficient 0.80
Peak flow from the 1 in/hr storm 1.62 cfs
Time of concentration 9.25 min
Rainfall intensity, 10-yr storm 6.23 in/hr
Peak flow from the 10-yr storm 10.12 cfs
Where Does the Level Spreader Discharge ? n/a
To a grassed bioretention cell? Y (Y or N) Do not complete filter strip characterization below.
To a mulched bioretention cell? N (Y or N)
To a wetland? N (Y or N)
To a filter strip or riparian buffer? N (Y or N)
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass ft
Width of dense ground cover It
Width of wooded vegetation It
Total width ft
Elevation at downslope base of level lip fmsl
Elevation at top of bank of the receiving water fmsi
Slope (from level lip to to top of bank) %
Are any draws present? (Y or N)
Level Spreader Design
Forebay surface area 400.00 sq It OK
Feet of level lip needed per cfs 13 ft/cfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm? Y (Y or N)
Length based on the 10-yr storm? N (Y or N)
Length based on the BMP discharge rate? N (Y or N)
Design flow 1.62 cfs
Is a bypass device provided? Y (Y or N) OK
Length of the level lip 40.00 ft Level spreader length OK.
Are level spreaders in series? N (Y or N)
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland? N (Y or N)
Does the channel enter the stream at an angle? Y (Y or N)
Dimensions of the channel (see diagram below):
M 2.00 ft
B 10.00 ft
W 18.00 ft
y 2.00 ft
Peak velocity in the channel during the 10-yr storm 3.30 cfs
Channel lining material Grass `
•
cx7
M

`, 1
------------- ?
M
? B i
Charlotte Airport,
Precipitation Data Chart From: http://hdsc.nws.noaa.gov/hdsc/pfds/
Preci pitat ion Frequent Estima tes ( inches)
ARI*
(years) 5
min 10
min 15
min 30
min 60
min 120
min 3
hr 6
hr 12
hr 24
hr 4
day 7
day 10
day 20
day 30
day 45
day 60
day
1 0.4 0.63 0.79 1.09 1.35 1.57 1.68 2.03 2.41 2.77 k 3.63 4.17 4.78 6.41 7.92 9.96 11.8
2 0.47 0.75 0.94 1.3 1.64 1.9 2.02 2.45 2.91 3.34 4.36 4.97 5.69 7.57 9.31 11.7 13.8
5 0.55 0.88 1.11 1.57 2.02 2.36 2.52 3.06 3.64 4.19 4.86 5.37 6.04 6.83 8.93 10.8 13.3 15.6
10 0.6 0.96 1.22 1.77 2.3 2.71 2.91 3.54 4.23 4.86 5.62 6.18 6.9 7.73 10 12 14.6 17
25 0.67 1.06 1.35 1.99 2.65 3.16 3.44 4.19 5.04 576 6.64 7.28 8.08 8.94 11.5 13.5 16.2 18.8
50 0.71 1.13 1.43 2.16 2.93 3.51 3.85 4.7 5.69 6.48 7.45 8.15 9.01 9.89 12.6 14.7 17.5 20.1
100 0.75 1.19 1.51 2.31 3.19 3.85 4.27 5.23 6.36 7.22 8.27 9.04 9.97 10.9 13.7 15.9 18.7 21.4
200 0.79 1.25 1.57 2.45 3.44 4.19 4.7 5.77 7.06 7.97 9.11 9.95 11 11.8 14.9 17.1 19.9 22.
7
500 0.83 1.31 1.65 2.62 3.76 4.64 5.29 6.52 8.04 9 10.3 11.2 12.3 1 16.4 18 1
.
1000 0.86 1.35 1.69 .74 4 4.97 5.75 7.11 8.82 9.8 11.2 12.2 13.3 14.1 17.6 11 .
Finding The 10-yr, 24-hr Storm:
Read Chart:
Time of Conc.: T,=
=(L3/H).385/128
Hydraulic Length, L
Change in Elev., H
Intensity, Peak 10-yr
d(in)/t jm in)*60(min/hr)
Depth at Tc & 10-y,: d=
Intensity, Peak 1-yr
d(in)/t,(min)*60(min/hr)
Depth at Tc & 1-y,: d=
4.86 inches
9.25 min (Calculate this value from the hydraulic length and the change in elevation
along the hydraulic length)
1200 ft Furthest distance water flows to BMP
18 ft Over hydraulic length
6.23 in/hr
0.96 in
0.31 in/hr
0.63 in

• POINT PRECIPITATION •,
• FREQUENCY ESTIMATES ` i
`
FROM NOAA ATLAS 14 ,,.,.
CHARLOM WSO ARPT, NORTH CAROLINA (31-1690) 352225 N 809542 W728 feet
• soom Tadpb1iam-n.q-X Attu dtlu imil&d St s' NOAA Atlu U, Vohme 2, V-iam 3
G.M. B-, D. Matra, B. Lm, T. Parybok, M.Yd U, and D. air y
NOAA, Naiawl W.6- Savxe, Silva Ste, Mayla:d, 2004
• flmuted. M- Ad 21 2008
Confidence Limits Seasonality Location Maps ; Other Mfo GIS data Maps Help Does G Map
•
•

• Precipitation Intensity Estim ates (itulw)

•
ARarI*

(yes)'

5 m1n
10

min _ ..:.:
16
-
min

- ._
30 60

min --[i0-.
-
in
120

-1i6.
-
min

-
3 hr

6 hr

12 hr .....:_

24 hr

481 :d day

7 day _
10
20

day
30

d?
45

dda
6D

dda

• 1 4.76
_ 3.80 3 17

: 2.17 11.35 0.79 10.56 0.34 0.20

: 0 12 0 07

` D 04 0.02 0,02
..... ID 01
. 0.01 0.01 0.01
2 5 64 4,51 3 78 2,61 '1 64 0.95 10.67 0.41 0.24 0,14 0,09 0.05 O.D3 0.02 0 ,02
0.01
0.01
0.01
5 6.55 '55.25 4,43 3 14 -2.02 1.18 0.84 0.51 1030 0.17 O JO 1 0.06 10.04 U3 ;0.02 0.02 F0.01 : 0.01
10 7 22 5 78 A4 87 153
-
- 2.30 135 0 97 0.59 0 35 0 20 012 0 06 0.04 0 03 0.02 0.02 0.01 ! O.DI
25 X7.99 6.37 5 38 3.9
9 ,2.65 1.58 !1.14 0.70 0.42 0.24 0.14 0.08 0.05 0.04 0.02 0,02 10.02 0.01
50 8.53 X6.80 X5.74 4.32 2.93 ;1.75 1.28 0.79 0.47 D.27 0.16 0.08 0.05 0.04 0.03 0.02 0.02 0.01
100 9.02 I7 16 6.04 4.62 [3.19- 1.93 1.42 0.87 X0.53 0.30 iD I7 ,0.09 0.06 0.05 =0 03 0.02 !R02 0 DI

•
20D ?-
944
._..._7 49
6 30
490
3 -04
2 10
X1__m_.57
0 96 ?
1i0 59
D.33
(0 19
0 10
ID 07
0.05
0 03
0.02
'66i
D 02
500 9.94 17.86 06.59 5.25 3 76 2.32 1 76 1.09 0.67 0.38 [0 21 :0.12 (0.07 0.05 D 03 0.03 (0.02 D.02
1000 10.27 ;8.09 6.77 5.48 4 00 2.49 1.91 :1.19 0 73 0.41 0 23 0.13 0.08 0.06 0 04 0.03 0.02 0.02 '
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
*These precipilation frequency estimates are based on a partial duration series. ARIisthe Aerage Recurrence Internal.
Please refertothe documentation for more information. NOTE: Formatting forces estimates near zero to appear as zero.
•
•
•
CDIA SWMP
Area West of 2nd Parallel Runway
Bioretention Calculations for Drainage Area A2 only
Volume Calculations
IA= Impervious portion of Drainage Area = 1.47 = 0.24
Total Drainage Area 6.098
R„ = 0.05 + 0.91A = 0.27
Total Drainage Area = 7.31 ac
Volume = 3630*RD*Rv*A = 7083.77 cft
Dimentions of Bioretention Cell = 60 x 120 sqft
Ponding Depth = 1 ft
Volume = 7200 cft
Drawdown Calculations
Total volume to be treated 7084 cft
Permability of Soil (POS) 1.5 in/hr
Surface Area of Soil (SA) 7200 cft
Draw down time for ponded area
V to be treated
PoS * SA of Soil
7084 _ 7.9 hrs
0.125 7200
Drawdown Time to 24 in below surface
1 ft of Ponding Depth into soil is 8 hrs
2 ft of soil is 16 hrs
Total Drawdown time 24 hrs
Underdrain Sizing
Q in Volume 7084 cft
Time 24 hr
V = 0.08 cfs
T
Using Orfice Equation
CD 0.4
D 4 in
Area 0.09 sqft
Hav9 1.5 ft
Q out Cd * A * SQRT (2gH) = 0.19 cfs
Using a 4 in underdrain exceeds the flow into the underdrains by 0.11 cfs. No backwater will occur.
October 15, 2008
HDR Engineering, Inc
of the Carolinas

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STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)I
?J N
o? y
[1, PROJECT INFORMATiON
Project name i A'Y r1P,:i
Contact name Ron Gieger
Phone number 704338-6825
Date October 16, 2008
Drainage area number Old Dowd Road A2
II, DESIGN INFORMATION -- __-- ? -- ??
For Level Spreaders Receiving Flow From a BMP
Type of BMP
Drawdown flow from the BMP cfs
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area 88,429.23 ftz
Impervious surface area 64,193.00 fe
Percent impervious 72.59 %
Rational C coefficient 0.80
Peak flow from the 1 in/hr storm 1.62 cfs
Time of concentration 9.25 min
Rainfall intensity, 10-yr storm 6.23 inlhr
Peak flow from the 10-yr storm 10.12 cfs
Where Does the Level Spreader Discharge ? n/a
To a grassed bioretention cell? Y (Y or N) Do not complete filter strip characterization below.
To a mulched bioretention cell? N (Y or N)
To a wetland? N (Y or N)
To a filter strip or riparian buffer? N (Y or N)
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass ft
Width of dense ground cover ft
Width of wooded vegetation ft
Total width ft
Elevation at downslope base of level lip fmsl
Elevation at top of bank of the receiving water fmsl
Slope (from level lip to to top of bank) %
Are any draws present? (Y or N)
Level Spreader Design
Forebay surface area 400.00 sq It OK
Feet of level lip needed per cfs 13 fucfs
Answer "Y" to one of the following:
Length based on the 1 in/hr storm? Y (Y or N)
Length based on the 10-yr storm? N (Y or N)
Length based on the BMP discharge rate? N (Y or N)
Design flow 1.62 cfs
Is a bypass device provided? Y (Y or N) OK
Length of the level lip 40.00 ft Level spreader length OK.
Are level spreaders in series? N (Y or N)
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr storm
Channel lining material
N (Y or N)
Y (Y or N)
2.00 ft
10.00 ft
18.00 ft
2.00''' ` ft
3.30 , cfs
Grass

1 + -------
M
i B i
1
--------------
M

CDIA SWMP
Area West of 2nd Parallel Runway
October 15, 2008
HDR Engineering, Inc.
of the Carolinas
Velocity Calculations for A01 Bypass Channel For Filter Strip
A02 Design section
Front Slope Base Back Slope
6:1 2 3:1

L Up h Dwn h delta h i
ft ft ft ft ft/ft
1,100 732.00 695 37.00 0.0336 Qdesign =
Manning's Equatio n
Q v B Y z A n P R
cfs fps ft ft sq ft Grass ft
2.96 2.1 10 0.14 2 1.4 0.035 10.63 0.14
4.94 2.5 10 0.19 2 2.0 0.035 10.85 0.18
7.31 2.9 10 0.24 2 2.5 0.035 11.07 0.23
10.05 13 10 0.29 2 3.1 0.035 11.30 0.27
13.13 3.6 10 0.34 2 3.6 0.035 11.52 0.32
16.55 3.9 10 0.39 2 4.2 0.035 11.74 0.36
20.29 4.2 10 0.44 2 4.8 0.035 11.97 0.40

10.12
Ultra-Urban BMP - FHWA
Page 1 of 4
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Stormwater Best Management Practices in an Ultra-Urban
Setting: Selection and Monitoring
Fact Sheet - Street Sweepers
Streetsweeping is an effective ultra-urban best management practice for reducing total suspended solids and
associated pollutant washoff from urban streets. Recent studies have found that streetsweeping programs using
equipment based on new technologies can significantly reduce pollutant washoff from urban streets, with potential
reductions of up to 80 percent in annual total suspended solids and associated pollutants (Sutherland and Jelen,
1996).
Applicability
• Streetsweeping is well suited to ultra-urban environments where little land is available for installation of structural
controls. It should be considered in commercial business districts, industrial sites, and intensely developed areas in
close proximity to receiving waters. For highway applications, streetsweeping may be considered for road
shoulders, where safety permits, rest stop parking areas, or maintenance yards. The benefits of streetsweeping will
be best realized by using the most sophisticated sweepers at a weekly to bimonthly frequency depending on local
• conditions, with a careful assessment of whether certain rules such as restricted street parking prior to and during
sweeping can be enforced. Streetsweeping is not effective in removing oil and grease, and older conventional
mechanical sweepers are limited in their ability to remove fine sediment.
Types of Street Sweepers
Mechanical sweepers employ a rotating gutter broom to remove particles from the street gutter area, with a water
• spray used to control dust. The particles removed are placed in the path of a cylindrical broom that rotates to carry
the material onto a conveyor belt and into a storage hopper. This is the most widely used equipment for street
cleaning in the United States.
Vacuum-assisted sweepers also use gutter brooms to remove particles from the street. However, the refuse is
then placed in the path of a vacuum intake that transports the dirt to the hopper. The transported dirt is usually
saturated with water. The overall efficiency of vacuum-assisted cleaners is generally higher than that of mechanical
cleaners, especially for particles larger than the dust and dirt range (larger than about 3 mm).
Tandem sweeping operations involve two successive cleaning passes, first by a mechanical (broom and conveyor
belt) sweeper, followed immediately by a vacuum-assisted sweeper.
Regenerative air sweepers blow air onto the pavement and immediately vacuum it back to entrain and capture
accumulated sediments. Air is regenerated for blowing through a dust separation system.'If the accumulated
loading is not too great, regenerative air sweepers are generally considered effective for removing fine sediment
(Sutherland and Jelen, 1996).
Vacuum-assisted dry sweepers combine the important elements of tandem sweeping into a single unit. These
sweepers apply technology originally developed to remove spilled coal and coal dust from railroad tracks. The
technology has also been applied to industrial sites where complete removal without leakage of particulate matter is
important. The mechanical sweeping component in these sweepers is completely dry. A specialized rotating brush
is used to scratch and loosen dirt and dust from impervious surfaces, allowing the vacuum system to recover
practically all particulate matter. A continuous filtration system prevents very fine particulate matter from leaving the
hopper, which prevents the formation of the dust trails typically seen with conventional mechanical sweepers.
http://www.fhwa.dot.gov/environment/ultraurb/3fsI6.htm 10/15/2008
Ultra-Urban BMP - FHWA
Effectiveness
The effectiveness of streetsweeping programs depends on several factors, including:
Page 2 of 4
Type and operation of equipment used: Vacuum-assisted and regenerative air sweepers are generally more
efficient than mechanical sweepers at removing finer sediments, which often bind a higher proportion of heavy
metals (Table 18). The performance of sweepers can be enhanced by operating them at optimal speeds (6 to 8
mi/h), ensuring that brushes are properly adjusted, and ensuring that appropriate rotation rates and sweeping
patterns are used. Tests conducted on the newer vacuum-assisted dry sweepers have shown they have
significantly enhanced capabilities to remove sediment compared to conventional sweepers, with projected
reductions of up to 79 percent in total suspended solids loadings from urban streets. In addition, these sweepers are
extremely effective at removing respirable (PM-10) particulate matter (particles with an aerodynamic diameter less
than or equal to 10 microns) compared to conventional sweepers (Table 19) and are designed to help meet National
Ambient Air Quality standards.
Table 18. Efficiencies of mechanical (broom) and vacuum-assisted sweepers
Constituent Mechanical sweeper efficiency (%) Vacuum-assisted sweeper efficiency (%)
Total Solids 55 93
Total Phosphorus 40 74
Total Nitrogen 42 77
COD 31 63
BOD 43 77
Lead 35 76
Zinc 47 85
Source: NVPDC (1992), as cited in Young et al. (1996).
Table 19. PM-10 Particulate removal efficiencies for
various sweepers
Sweeper type Removal Efficiency (%)
Mechanical - Model 1 -6.7
Mechanical - Model 2 8.6
Regenerative Air 31.4
Vacuum-assisted wet - Model 1 40.0
Vacuum-assisted wet - Model 2 82.0
Vacuum-assisted dry 99.6
Sweeping frequency and number of passes: To achieve a 30 percent removal of street dirt, the sweeping interval
should be less than two times the average interval between storms. To achieve 50 percent removal, sweeping must
occur at least at least once between storms. Generally two passes per run should be conducted, which will result in
the removal of up to 75 percent of total solids present before sweeping. Certain conditions may warrant increased
sweeping frequencies. These include streets with high traffic volumes in industrial areas and streets with high litter
or erosion zones. In addition, the sweeping frequency should be increased just before the wet season to remove
sediments accumulated during the summer.
Climate: Sweeping appears most effective in areas with distinct wet and dry seasons (CDM et al., 1993).
http://www.thwa.dot.gov/environment/ultraurb/3fsI 6.htm 10/15/2008
Ultra-Urban BMP - FHWA Page 3 of 4
Factors that limit the overall effectiveness of streetsweeping programs include:
o Presence of parked cars and traffic congestion during sweeping.
4 Poor road surface and curb conditions.
o Presence of construction projects nearby.
. Considerations for Equipment Selection
The selection of the type of sweeper will depend on specific conditions prevailing at sites targeted for sweeping. In
• general, mechanical sweepers are more effective at picking up large debris and cleaning wet streets and have lower
capital and operating costs. However, mechanical sweepers can create large amounts of airborne dust. Vacuum-
assisted and regenerative air sweepers are more effective at removing fine particles and associated heavy metals
• but tend to be ineffective at cleaning wet streets. They may also be noisier than mechanical sweepers, which can
restrict the hours of operation in some areas. It may also be necessary to deploy a mechanical sweeper ahead of
• vacuum-assisted sweepers to remove large debris.
The somewhat larger capital costs associated with the newer vacuum-assisted dry sweepers may be warranted for
• areas where worker and public safety from respirable particulate matter is of concern. Vacuum-assisted sweepers
• are capable of providing close to 100 percent removal of PM-10 particulates and also provide better overall removal
of sediment.
Maintenance and Operational Requirements
The overall maintenance requirements for mechanical sweepers are greater than those for vacuum-assisted and
regenerative air sweepers since mechanical sweepers contain more moving parts that require periodic replacement.
Vacuum-assisted dry sweepers have significantly less down time than water-based sweepers (less than 10 percent
of total operating time compared to about 50 percent for water-based sweepers) because they require no water
loading. In addition, clean-up and dumping times are shorter.
For an effective streetsweeping program, consideration should be given to the following operational requirements:
o Ensure there are adequately trained sweeper operators and maintenance personnel.
e Provide traffic control officers to enforce parking restrictions.
o Choose sweeping frequencies and cleaning routes to optimize overall sweeping efficiencies.
o Make appropriate arrangements for disposal of collected waste.
o Reduce source loadings through various measures such as public awareness of proper disposal procedures
for used oil and yard waste, and enforcement of erosion control and stormwater pollution prevention
practices at urban construction sites.
Cost Considerations
Conventional sweeper costs range from $69,000 to $127,000 (1995 dollars), with the higher end of this range
associated with vacuum-assisted and regenerative air sweepers (CDM, 1993). The useful life span of these
sweepers is generally four to seven years, and the operating cost associated with these sweepers about $70 per
hour (1996 dollars; Finley, 1996). The capital cost of vacuum-assisted dry sweepers is on the order of $170,000
(1996 dollars; Enviro Whirl Technologies, personal communication, 1996) with a projected useful life span of about
eight years and operating costs of approximately $35 per hour (Satterfield, 1996 dollars).
References
• Camp Dresser & McKee (CDM), Larry Walker Associates, Uribe and Associates, and Resources Planning
Associates. 1993. California Stormwater Best Management Practice Municipal Handbook. BMP: Street Cleaning,
• pp. 4-64 to 4-66.
Enviro Whirl Technologies, Inc. 1996. Product literature. Enviro Whirl Technologies, Inc., Centralia, IL.
httD://www.fhwa.dot.Rov/environment/ultraurb/3fsI6.htm 10/15/2008
Ultra-Urban BMP - FHWA
Page 4 of 4
Finley, S. 1996. Sweeping Works. Pavement Maintenance and Reconstruction. October/November, pp. 16-17.
NVPDC. 1992. Northern Virginia BMP Handbook: A Guide to Planning and Designing Best Management Practices
in Northern Virginia. Prepared by Northern Virginia Planning District Commission (NVPDC) and Engineers and
Surveyors Institute.
Satterfield, C. 1996. Enviro Whirl I PM-10 Efficiency Study Removing Reentrained Road Dust. Prepared for Enviro
Whirl Technologies Inc. by Satterfield & Associates, June Lake, CA.
Sutherland, R.C., and S.L. Jelen. 1996. Studies Show Sweeping has Beneficial Impact on Stormwater Quality.
APWA Reporter (November): 8-23.
Young, G.K., S. Stein, P. Cole, T. Kammer, F. Graziano, and F. Bank. 1996. Evaluation and Management of
Highway Runoff Water Quality. FHWA-PD-96-032. Federal Highway Administration, Office of Environment and
Planning.
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