19970558 Ver 1_COMPLETE FILE_19970623

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
Wake County Public School System
c/o Mr. Sam Pridgen
PO Box 14005
RTP, NC 27709
Dear Mr. Pridgen:
WQC Project #970558
Wake County
A4?
?EHNF1
December 8, 1997
On June 19,1997, you requested a 401 Water Quality Certification from the Division
of Water Quality for your project (sewer installation) located near Cary in Wake County.
We spoke to you on July 18, 1997 discussing concerns that we have regarding the design
of the project, which we need a map and placing it on hold until those concerns are
addressed. As of today, we have not received a response to our earlier letter. Unless we
receive a written response from you by December 19, 1997, we will consider that you have
withdrawn this application and are not interested in pursuing the project at this time.
Please call me at 919-733-1786 if you have any questions or would like to discuss this
matter.
S
cc: Raleigh DWQ Regional Office
Wilmington District Corps of Engineers
Central Files
Join R. ISorney
Wlitter Quality Certi cation Program
970558.clr
Division of Water Quality • Environmental Sciences Branch
4401 Reedy Creek Rd., Raleigh, NC 27626-0535 • Telephone [phone] • FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post-consumer paper
THE JOHN R. McADAMS COMPANY, INC.
CONSULTING ENGINEERS
970558
POST OFFICE BOX 14005
RESEARCH TRIANGLE PARK, NORTH CAROLINA 27709
[phone] FAX [phone]
LETTER OF TRANSMITTAL
To: Mr. Eric Alsmeyer
US Army Corps of Engineers
Regulatory Branch Office
6508 Falls of the Neuse Road, Suite 120
Raleigh, North Carolina 27615
Re: BBB High School, Cary, NC
Carpenter Upchurch Road
I am sending you the following item(s):
So`i ??
C)
?0
Date: June 19, 1997
Job No:
CHY-96000
COPIES DATE NO. DESCRIPTION
1 Original of Pre-Construction Notification Form
1 Copy of Pret Construction Notification Form
1 ea. Engineering Drawings C401, C402, C403, C404

These are transmitted as checked below:
As requested
_X- For approval
For review and comment
Remarks:
For your use
Copy to: Mr. ohn orney. DWQ
Signed A 6
Samuel I. Pridg6fi
Preconstruction Manager

3 '
DEM ID: 97055F CORPS ACTION ID: `
NATIONWIDE PERMIT REQUESTED (PROVIDE NATIONWIDE PERMIT #):
PRE-CONSTRUCTION NOTIFICATION APPLICATION
FOR NATIONWIDE PERMITS THAT REQUIRE:
1) NOTIFICATION TO THE CORPS OF ENGINEERS
2) APPLICATION FOR SECTION 401 CERTIFICATION
3) COORDINATION WITH THE NC DIVISION OF COASTAL MANAGEMENT
SEND THE ORIGINAL AND (1) COPY OF THIS COMPLETED FORM TO THE APPROPRIATE
FIELD OFFICE OF THE CORPS OF ENGINEERS (SEE AGENCY ADDRESSES SHEET). SEVEN
(7) COPIES SHOULD BE SENT TO THE N.C. DIVISION OF ENVIRONMENTAL MANAGEMENT
(SEE AGENCY ADDRESSES SHEET). PLEASE PRINT.
1. OWNERS NAME: Wake County Public School System
2. MAILING ADDRESS: 3600 Wake Forest Road.
SUBDIVISION NAME: N/A
CITY: Raleigh STATE: - NC ZIP CODE: 27609
PROJECT LOCATION ADDRESS, INCLUDING SUBDIVISION NAME-(IF DIFFERENT FROM
MAILING ADDRESS ABOVE): Carpenter Upchurch Road at Green Elope School Road
3. TELEPHONE NUMBER (HOME): N/A (WORK): _(919) 856-8249
4. IF APPLICABLE: AGENT'S NAME OR RESPONSIBLE CORPORATE OFFICIAL, ADDRESS,
PHONE NUMBER: Mark Janes, Project ManaLrer
;'lake County Public School Systems
Construction Management Department
Facilities Building
1551 Rock Quarry Road
Raleigh, NC 27610
5. LOCATION OF WORK (PROVIDE A MAP, PREFERABLY A COPY OF USGS TOPOGRAPHIC
MAP OR AERIAL PHOTOGRAPHY WITH SCALE):
COUNTY: Wake - NEAREST TOWN OR CITY: Cary
1
Parallel to unnamed creek east of
Carpenter Upchurch Road SPECIFIC LOCATION (INCLUDE ROAD
NUMBERS, LANDMARKS, ETC.):
6. IMPACTED OR NEAREST STREAM/RIVER: None
RIVER BASIN: Cape Fear
7a. IS PROJECT LOCATED NEAR WATER CLASSIFIED AS TROUT, TIDAL SALTWATER
(SA), HIGH QUALITY WATERS (HQW), OUTSTANDING RESOURCE WATERS (ORW), WATER
SUPPLY (WS-I OR WS-II)? YES [ ] NO [X] IF YES, EXPLAIN:
7b. IS THE PROJECT LOCATED WITHIN A NORTH CAROLINA DIVISION OF COASTAL
MANAGEMENT AREA OF ENVIRONMENTAL CONCERN (AEC)? YES [ ] NO [$)
7c. IF THE.PROJECT- IS LOCATED WITHIN A COASTAL COUNTY (SEE PAGE 7 FOR
LIST OF COASTAL COUNTIES), WHAT IS THE LAND USE PLAN (LUP) DESIGNATION?
No
8a. HAVE ANY SECTION 404 PERMITS BEEN PREVIOUSLY REQUESTED FOR USE ON
THIS PROPERTY? YES [ ] NO [X] IF YES, PROVIDE ACTION I.D. NUMBER OF
PREVIOUS PERMIT AND ANY ADDITIONAL INFORMATION (INCLUDE PHOTOCOPY OF 401
CERTIFICATION):
8b. ARE ADDITIONAL PERMIT REQUESTS EXPECTED FOR THIS PROPERTY IN THE
FUTURE? YES [ ] NO []q IF YES, DESCRIBE ANTICIPATED WORK:
9a. ESTIMATED TOTAL NUMBER OF ACRES IN TRACT OF LAND: N/A
9b. ESTIMATED TOTAL NUMBER OF ACRES OF WETLANDS LOCATED ON PROJECT SITE:
NIA
2
10a. NUMBER OF ACRES OF WETLANDS IMPACTED BY THE PROPOSED PROJECT BY:
FILLING: EXCAVATION:
FLOODING: OTHER:
DRAINAGE:
TOTAL ACRES TO BE IMPACTED: N/A
10b. (1) STREAM CHANNEL TO BE IMPACTED BY THE PROPOSED PROJECT (IF
RELOCATED, PROVIDE DISTANCE BOTH BEFORE AND AFTER RELOCATION): None
LENGTH BEFORE: FT AFTER: 'FT
WIDTH BEFORE (based on normal high water contours): FT
WIDTH AFTER: FT
AVERAGE DEPTH BEFORE: FT AFTER: FT
(2) STREAM CHANNEL IMPACTS WILL RESULT FROM: (CHECK ALL THAT APPLY)
OPEN CHANNEL RELOCATION: PLACEMENT OF PIPE IN CHANNEL:
CHANNEL EXCAVATION: CONSTRUCTION OF A DAM/FLOODING:
OTHER: None
11. IF CONSTRUCTION OF A POND IS PROPOSED, WHAT IS THE SIZE OF THE
WATERSHED DRAINING TO THE POND? None
WHAT IS THE-EXPECTED POND SURFACE AREA?
12. DESCRIPTION OF PROPOSED WORK INCLUDING DISCUSSION OF TYPE OF
MECHANICAL EQUIPMENT TO BE USED (ATTACH PLANS: 8 1/2" X 11" DRAWINGS
ONLY) : Gravity sewer line to be installed parallel to creek using conventional
excavatine equipment used to install utilities The sewer line is beinff
installed to serve the new BBB Hiah School on Carpenter UDburch Road
13. PURPOSE OF PROPOSED WORK: See #12
3
49
14.. STATE REASONS WHY IT IS BELIEVED THAT THIS ACTIVITY MUST BE CARRIED
OUT.IN WETLANDS. (INCLUDE ANY MEASURES TAKEN TO MINIMIZE WETLAND
IMPACTS) : The sewer line will run throuth an existing Town of Cary utility
easement located approximately parallel to an unnamed creek_ The -easement
runs across several properties not owned by the Town or the Wake County
Public School System Wetlands have not been identified throughout the
sewer line route.
15. YOU ARE REQUIRED TO CONTACT THE U.S. FISH AND WILDLIFE SERVICE ?/,.
(USFWS) AND/OR NATIONAL MARINE FISHERIES SERVICE (NMFS) (SEE AGENCY li v ?•• " =
ADDRESSES SHEET) REGARDING THE PRESENCE OF ANY FEDERALLY LISTED OR
PROPOSED FOR LISTING ENDANGERED OR THREATENED SPECIES OR CRITICAL HABITAT
IN THE PERMIT AREA THAT MAY BE-AFFECTED BY THE PROPOSED PROJECT. DATE
CONTACTED: N/A (ATTACH RESPONSES
FROM THESE AGENCIES.)
16. YOU ARE REQUIRED TO CONTACT THE STATE HISTORIC,-PRESERVATION.•OFFICER !.? c?
(SHPO) (SEE AGENCY ADDRESSES. SHEET) REGARDING THE PRESENCE OF HISTORIC
PROPERTIES IN THE PERMIT AREA WHICH MAY BE AFFECTED BY THE-PROPOSED -
PROJECT. DATE CONTACTED:. N/A
17. DOES THE PROJECT INVOLVE AN EXPENDITURE OF PUBLIC FUNDS OR THE USE OF
PUBLIC (STATE) LAND?
YES N NO [) (IF NO, GO TO 18)
a. IF YES, DOES THE PROJECT REQUIRE PREPARATION OF AN ENVIRONMENTAL
DOCUMENT PURSUANT TO THE REQUIREMENTS OF THE NORTH CAROLINA ENVIRONMENTAL
POLICY ACT?
YES [I NO [
b. IF YES, HAS THE DOCUMENT BEEN REVIEWED THROUGH THE NORTH CAROLINA
DEPARTMENT OF ADMINISTRATION STATE CLEARINGHOUSE?
YES (I NO [
IF ANSWER TO 17b IS YES, THEN SUBMIT APPROPRIATE DOCUMENTATION FROM THE
STATE CLEARINGHOUSE TO DIVISION OF, ENVIRONMENTAL MANAGEMENT REGARDING
COMPLIANCE WITH THE NORTH CAROLINA ENVIRONMENTAL POLICY ACT.
QUESTIONS REGARDING THE STATE CLEARINGHOUSE REVIEW PROCESS SHOULD BE
DIRECTED TO MS. CHRYS BAGGETT, DIRECTOR STATE CLEARINGHOUSE, NORTH
CAROLINA DEPARTMENT OF ADMINISTRATION, 116 WEST JONES STREET, RALEIGH,
NORTH CAROLINA 27603-8003, TELEPHONE [phone].
4

18. THE FOLLOWING ITEMS SHOULD BE INCLUDED WITH THIS APPLICATION IF
PROPOSED ACTIVITY INVOLVES THE DISCHARGE OF EXCAVATED OR FILL MATERIAL
INTO WETLANDS:
a. WETLAND DELINEATION MAP SHOWING ALL WETLANDS, STREAMS, LAKES
AND PONDS ON THE PROPERTY (FOR NATIONWIDE PERMIT NUMBERS 14, 18, 21, 26,
29, AND 38). ALL STREAMS (INTERMITTENT AND PERMANENT) ON THE PROPERTY
MUST BE SHOWN ON THE MAP. MAP SCALES SHOULD BE 1 INCH EQUALS 50 FEET OR 1
INCH EQUALS 100 FEET OR THEIR EQUIVALENT.
b. IF AVAILABLE, REPRESENTATIVEIPHOTOGRAPH OF WETLANDS TO BE
IMPACTED BY PROJECT.
C. IF DELINEATION WAS PERFORMED BY A CONSULTANT, INCLUDE ALL DATA
SHEETS RELEVANT TO THE PLACEMENT OF THE DELINEATION LINE.
d. ATTACH A COPY OF THE STORMWATER MANAGEMENT PLAN IF REQUIRED.
e. WHAT IS LAND USE OF SURROUNDING PROPERTY? Rural/ Residential
f. IF APPLICABLE, WHAT IS PROPOSED METHOD OF SEWAGE DISPOSAL?
Proposed sewer line connects to the Town of Cary's public sewer system.
g. SIGNED AND DATED AGENT AUTHORIZATION LETTER, IF APPLICABLE.
NOTE: WETLANDS OR WATERS OF THE U.S. MAY NOT BE IMPACTED PRIOR TO:
1) ISSUANCE OF A SECTION 404 CORPS OF ENGINEERS PERMIT,
2) EITHER THE ISSUANCE OR WAIVER OF A 401 DIVISION OF
ENVIRONMENTAL MANAGEMENT (WATER QUALITY) CERTIFICATION, AND
3) (IN THE TWENTY COASTAL COUNTIES ONLY) , A LETTER FROM THE
NORTH CAROLINA DIVISION OF COASTAL MANAGEMENT STATING THE PROPOSED
ACTIVITY IS CONSISTENT WITH THE NORTH CAROLINA COASTAL MANAGEMENT
PROGRAM.
0 R'S/AGENT'S SIGNATURE
H. Spencer Graves
(AGENT'S SIGNATURE VALID ONLY
IF AUTHORIZATION LETTER FROM
THE OWNER IS PROVIDED (18g.))
DATE
5
State oNgorth Carolina
Department of Environment, _X 1W
Health and Natural Resources • •
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt Secretary C) E H N F1
A. Preston Howard, Jr., P.E., Director ,
December 9, 1997
r

Mr. Dennis Pitts
McNeely Associates
PO Drawer 30126
Raleigh, NC 27622
Dear Mr. Pitts:
Re: Stormwater plan approval
BBB High School
Wake County
DWQ # 960730
Recently we received a stormwater management plan for the proposed BBB High
School (Green Hope High) dated November 13, 1997 from yourself. This plan is adequate
to meet the stormwater condition of our certification. All other conditions of the Certification
are still applicable.
Please call Mr. Ray Cox or myself at 919-733-1786 if you have any questions.
S' cerel ,
n R. Dorney
cc: Raleigh Field Office, US COE
DWQ Raleigh regional Office
Ray Cox
Kevin Martin S & E C
Central Files
Division of Water Quality • Non-Discharge Branch
4401 Reedy Creek Rd., Raleigh, NC 27607 Telephone [phone] FAX # [phone]
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MEMORANDUM
Date: December 4, 1997
To: John Domey
From: J. Ray Cox, EIT
Environmental Engi r
Subject: Approved Stormwater Management Plan
BBB High School
DWQ #960730
Wake County
Comments: I spoke yesterday (12/3/97), with Dennis Pitts, the Landscape Architect in
charge of designing the stormwater management system for the subject
system. He indicated that he had met or spoken with you early in the process
and that you had both agreed on a "non-intrusive approach." He also
indicated that he and Tony Evans had been through the details to the point
where the only missing piece was a signed O&M agreement (and Tony's
notes support this idea).
The design he has submitted is certainly not standard, but it does seem to be
well-planned. He has included grassed swales wherever possible to route the
stormwater (a total of 29 swales are incorporated into the site plan). The
dam was removed from the old farm pond located at the southern edge of the
property. A low-flow channel has formed there and the previously ponded
area is growing into a wetland. Several stormwater lines have been designed
to drain into this area. The increased hydrology from those lines should
facilitate development of the wetland area.
Mr. Pitts also discussed the design of the stormwater dry detention/wetland
area proposed at the northeastern corner of the site. A rock weir is proposed
across the stormwater channel in that area. The weir has been designed to
allow low flows to pass through fairly readily. Water from larger storms will
be detained, forming an impoundment behind the weir. The 10-year storm
event should completely inundate the 2.1 acres intended to be used for this
purpose. The 100-year storm will pass over the weir without sacrificing its
integrity according to Mr. Pitts.
I am convinced that the design will function well to handle the stormwater
from this particular site, and may indeed establish beneficial wetland areas
along the southern and northeastern edges of the site. The signed O&M
agreement ensures that both the Town of Cary and the Wake County Public
School System are dedicated to the proper functioning of this system. Wake
County Public School System maintains the financial responsibility. I
recommend approval of the stormwater management plan for this project.
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landscape architects & planning consultants
PO Drawer 30126 • Raleigh, NC 27622 • [phone]
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RECEIVED
NOV ^ ; 1997
ENUIRONMENTALSCIENOES
Letter of Transmittal
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Date 1 NOV .
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GENTLEMEN:
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Copies Date Sheet Description
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WAKE COUNTY PUBLIC SCHOOL SYSTEM
FACILITY PLANNING
AND CONSTRUCTION DEPARTMENT
November 3, 1997
Mary G. Barry, Director
Parks, Recreation & Cultural Resources
Town of Cary
P. O. Box 8005
Cary, NC 27512-8005
Ref: Maintenance Agreement for Stormwater Management O & M Manual
Dear Mary,
Wake County Public School System will be responsible for inspections and maintenance
of the stone filter dam as outline in the enclosed Operation and Maintenance Manual.
The inspections shall be performed after a heavy rain and at least twice annually. The
draw down time shall be maintained between 24 and 48 hours. The maintenance shall
be performed in accordance with section F of the O & M Manual.
If you would sign the bottom of this letter and the last page of the O & M Manual, I will
forward the original to the NCDHNR. Thank you for your assistance and if you have any
question contact me at 856-8249.
Sincerely,
Mark C. Jane, /PE
Wake County Public School
Mary G. ry, Director
Parks, Recreation & Cultural Resources
Town of Cary
C: Mike Burriss, Heery International
Nick Harrison, WCPSS, Director of Buildings and Grounds
File 9158-93-dd
1551 ROCK QUARRY ROAD 0 FACILITIES BUILDING 9 RALEIGH, NORTH CAROLINA 27610 0 TELEPHONE [phone]

McNeely Associates pa
BBB High School
Stormwater Management
Operations and Maintenance Manual
A. LOCATION:
BBB High School
Carpenter-Upchurch Road
Cary, NC
B. OWNERS:
Wake County Public School System: Town of Cary:
Contact: Mr. Spencer Graves
Facilities Building
1551 Rock Quarry Rd.
Raleigh, NC, 27610
856-08280
BBBHS
5/12/97
Contact: Ms. Mary Barry
Parks & Recreation Dept.
Building B
Town Hall Campus
Cary, NC 27512-8005
469-4061
C. RECEIVING WATER BODY:
Crabtree Creek
D. INSPECTIONS:
The stone filter dam (Area A) and the farm pond dam (Area B) will be inspected
following a heavy rain and at least twice per year. Debris will be removed from
the spillway, displaced rip-rap or stone will be replaced and the "draw down" '
time will be monitored and confirmed to be between 24 and 48 hours from a full,
static ponded condition.
E. DRAW-DOWN TIMING:
If the draw-down time is found to be less than 24 hours or more than 48 hours,
modifications will be made to bring the timing within acceptable limits.
MAPA 1 of 4
McNeely Associates pa
F. MAINTENANCE:
Volunteer grasses and plant material will not be mown and will be allowed to
'naturalize'.
Formula 10-10-10 fertilizer at a rate of 10 Ibs/1000sq.ft. will be broadcast over
the wetted perimeter area in the Spring for the first two (2) years after the school
opens.
No herbicides will be used within the wetted perimeter of either area.
When sediment accumulates to one-half the design depth, this sediment will be
removed and the basin will be restored to original dimensions. Every attempt
will be made to protect existing volunteer tree seedlings and saplings from the
sediment removal operations.
After the sediment has been removed, the wetted perimeter will be seeded
according to the following requirements:
A. SEEDBED PREPARATION AND SEEDING SPECIFICATIONS -
Wetland Areas
1. Surface water control measures to be installed according to plan
2. Areas to be seeded shall be ripped and spread with available topsoil 6"
deep. Total seed bed prepared depth shall be 6" to 8" deep.
3. Loose rocks, roots and other obstructions shall be removed from surface
so that they will not interfere with establishment and maintenance of
vegetation. Surface for final seedbed preparation, at finish grades
shown, shall be reasonably smooth.
4. Provide agricultural lime at rate required to bring soil acidity to slightly
acid - ph 6, according to soil test report.
5. Lime and fertilizer shall be applied uniformly and mixed with the soil
during seedbed preparation.
6. Apply 0-20-10 commercial fertilizer at the rate of 20 Ibs/1,000 s.f. for
warm season mix (see schedule).
7. Apply 10-20-10 commercial fertilizer at the rate of 20 Ibs/1,000 s.f. for
cool season mix (see schedule).
8. Apply 10-10-10 commercial fertilizer at the rate of 20 Ibs/1,000 s.f. for
temporary cover crops. In addition, provide 15 Ibs/1,000 s.f. of
superphosphate.
9. The following is for the warm season mix:
a. All warm grass seed shall be debearded or conditioned by
brushing to create a product nearly the same as bedearding. This
does not apply to Switchgrass.
MAPA 2 of 4
McNeely Associates pa
b. Disc two times to break-up crop residue and dirt clods prior to
seeding.
C. Pack soil to create a firm seedbed with a cultpacker or roller.
d. If a rain shower should fall after the seedbed is prepared but
before planting break-up any crust formation.
e. Seeding shall be installed to a depth of 1/4" utilizing a rangeland
drill or conventional grass drills. It is extremely important that seed
not be planted deeper than 1/4" depth. Do not disc or harrow after
seeding. This will put the seed too deep. A Brillion seeder will be
acceptable.
10. Seed in accordance with the following schedule and application rates:
Dates Types Pate
April 1 - July 15 Warm Season Mix
Switchgrass, Cave-
in-rock, Alamo 8 pts #/acre or 4 oz/1000sf
Smartweed 2 bulk #/acre or 1 oz/1000sf
and
Japanese Millet or 20 lb/acre or 1/2 lb/1 000sf
Sorghum Sudan Grass
Hybrids
(Mow prior to maturity)
July 16 - Sept. 1 Temporary crop of 20 lb/acre or 1/2 lb/1000sf
Sorghum Sudan Grass
Hybrids (To be followed
by permanent mixture)
Sept. 2 - Nov.1 Cool Season Mix
Reed Canary Grass 12 bulk #/acre or 6 oz/1000sf
Smartweed 2 bulk #/acre or 1 oz/1000sf
Nov. 1 - March 31 Temporary Crop of 40 lb/acre
(To be followed by
permanent mixture)
11. Contractor shall be required to provide a permanent mixture according to the
schedule.
12. Temporary crops must be incorporated prior to seeding of permanent mixtures.
13. Cover crops or temporary crops must be mowed at proper times to prevent
seed heads from maturing. Wheat may be harvested.
14. Grass mix and temporary covers shall be mulched with straw applied at the rate
MAPA 3 of 4
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McNeely Associates pa
of 75 Ibs to 100 Ibs/1000sf. Use clean Wheat Straw.
15. If hydroseeded use Virgin Paper Mulch only.
Note:
Seed and additional information for the wetland mix as well as for other grass
areas may be purchased from, but not limited to:
Sharp Brothers Seed Company
Route 4, Box 237 A
Clinton, Missouri 64735
Phone [phone]
Contact: Jef Hodges
16. Wetlands crossings shall be covered with "Terra Jute" erosion control netting or
equal installed per manufacturer directions.
Local Distributor:
Web Tec, Inc.
PO Box 240302
Charlotte, NC 28224
1-800-438-0027 or 704-552-6722
Should evidence downstream indicate a problem with the principal spillway, the
rip-rap apron at the outlet shall be inspected for any damage. The size and
elevation of the basin, dam and spillway shall also be inspected to ensure it
meets design specifications. Any erosion damage or other problems found
shall be repaired immediately.

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landscape architects & planning consultants Project:
PO Drawer 30126 • Raleigh, NC 27622 • [phone] Pape of
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Dennis E. Pitts, ASLA
Larry J. Ragland, ASLA
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From:
? T¢ STATf q'
P MnY North Carolina Department of Environment
Health, and Natural Resources O? Printed on Recycled Paper
State of North Carolina
10 Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
September 8, 1997
McNeely Associates
Dennis Pitts
PO Drawer 30126
Raleigh, NC 27622
Subject: BBB High School
Project No. DWQ 960730
Wake County
Dear Mr. Pitts
This correspondence is concerning the stormwater management plan for the subject project.
The Stormwater Group is responsible for evaluating stormwater management plans
proposed in conjunction with 401 Water Quality Certifications. Stormwater Group staff
have reviewed the submitted plan and have determined that additional information is
necessary to complete the technical review process. The required additional information is
as follows:
• Dry Detention Pond
The dry detention pond must be designed according to design requirements in the
Stormwater Best Management Practices (BMP) manual (NCDEHNR, November 1995).
• Additional Control Measures Needed
The installation of the dry detention pond alone will not meet the required pollutant removal
of 85% TSS. Some type of other control measures that can be used in combination with
the dry detention pond and will meet the criteria include: grassed swales, filterstrips or
pockets wetlands. The descriptions and design requirements are also included in the BMP
manual.
• Operation and Maintenance Agreement
An operation and maintenance agreement is required. A stormwater control structure will
not operate as designed without regular maintenance. Typical requirements for an
operation and maintenance plan include the following:
• Vegetation management/mowing schedule
• Semi-annual inspections
• Debris check after every storm event
• Benchmark for sediment removal (specific elevations listed)
• Designation of a responsible: party
An example operation and maintenance plan is attached for your convenience. Please note
that the example plan is not site specific. Should you choose to use the example plan, it is
necessary to modify all of the "if' statements and provide specific benchmarks for sediment
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post-consumer paper

removal. The operation and maintenance agreement must also be signed by the responsible
party and notarized.
• Drainage Area
The proposed dry detention basin must be designed to treat all of the runoff draining to it.
Please verify the drainage area, including off-site drainage, for the proposed wet detention
basin.
• Design Storm
The design requirements must show that the pond must rout the volume of the 1 yr.-24
hour storm through the pond over a 48 hour period or hold the 1-inch volume of runoff for
2 to 5 days. The simple method can be used to calculate the volume of runoff for the latter.
Division stormwater staff will strive to complete a final technical review within 10 working
days of receipt of the requested information. If you have any questions or would like to
discuss this project, please contact me at [phone], extension 584
Sincerely,
Antonio Evans
Stormwater Engineer
cc: John Dorney, Ecological Assessment Group
Raleigh Regional Office
Jeanette Powell, Permits and Engineering
Central Files
Project No. DWQ
DIVISION OF WATER QUALITY
WET DETENTION BASIN WORKSHEET
Project Name : (3Q B :N4 yL Basin No.
Contact Person: John - r®yrn 5 _ Phone Number:
Sam I'r td 2n ?" ,
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a wet detention basin worksheet for each
basin, design calculations, plans and specifications showing all basin details, and a fully executed
operation and maintenance agreement. If your submittal package is incomplete you will be contacted for
additional information. This action will substantially delay the final review and approval of your project.
I. DESIGN PARAMETERS
Elevations
Bottom of Basin
Permanent Pool
Temporary Pool
Areas
Permanent Pool
Drainage Area
Impervious Area
Volumes
Permanent Pool
Temporary Pool
Forebay
Other Parameters
SA/DA used
Diameter of Orifice
ft.
ft. (elevation of the orifice invert out)
ft. (elevation of the outlet structure invert in)
sq. ft. (surface area of basin at permanent pool elevation)
ac. (include on and off-site drainage to the basin)
ac. (include on and off-site drainage to the basin)
cu. ft. (volume of main basin and forebay)
cu. ft.
cu. ft.
in. (draw down orifice diameter)
II. DESIGN REQUIREMENTS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices
manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and
Administrative Code Section: 15 A NCAC 2H .1008.
Verify that the following design requirements have been met. If not, attach an explanation of why.
()
()
()
O
O
()
()
()
O
()
Temporary pool controls runoff from 1 inch event
Length to width ratio greater than 3:1
Side slopes no steeper than 3:1
Submerged and vegetated perimeter shelf at less than 6:1
Vegetation to permanent pool elevation
Emergency drain provided to drain pond
Permanent pool depth between 3 and 6 feet (required minimum of 3 feet)
Draw down in 2 to 5 days
Forebay equal to approximately 20% of total basin volume
Sediment storage in permanent pool
Access provided for maintenance
30 foot vegetative filter at outlet
Site specific Operation and Maintenance Plan provided
() Vegetation management/mowing schedule
() Semi-annual inspections
() Debris check after every storm event
() Specific sediment clean-out benchmark listed (list elevation or depth, do not reference plans)
() Designation of a responsible party
DRAFT DIVQ Fonn SWG100 Revision 0 Jute 19, 1997

McNeely Associates pa
BBB High School
Stormwater Management
Operations'and Maintenance Man
A. LOCATION:
BBB High School
Carpenter-Upchurch Road
Cary, NC
B. OWNERS:

Wake County Public School System: Town of Cary:
Contact: Mr. Spencer Graves Contact:
Facilities Building
1551 Rock Quarry Rd.
Raleigh, NC, 27610
856-08280
C. RECEIVING WATER BODY:
Crabtree Creek
D. INSPECTIONS:

BBBHS
5/12/97
Ms. Mary Barry
Parks & Recreation Dept.
Building B
Town Hall Campus
Cary, NC 27512-8005
469-4061
The stone filter dam (Area A) and the farm pond dam (Area B) will be inspected
following a heavy rain and at least twice per year. Debris will be removed from
the spillway, displaced rip-rap or stone will be replaced and the "draw down" '
time will be monitored and confirmed to be between 24 and 48 hours from a full,
static ponded condition.
E. DRAW-DOWN TIMING:
If the draw-down time is found to be less than 24 hours or more than 48 hours,
modifications will be made to bring the timing within acceptable limits.
MAPA 1 of 4

McNeely Associates pa
F. MAINTENANCE:
Volunteer grasses and plant material will not be mown and will be allowed to
'naturalize'.
Formula 10-10-10 fertilizer at a rate of 10 Ibs/1000sq.ft. will be broadcast over
the wetted perimeter area in the Spring for the first two (2) years after the school
opens.
No herbicides will be used within the wetted perimeter of either area.
When sediment accumulates to one-half the design depth, this sediment will be
removed and the basin will be restored to original dimensions. Every attempt
will be made to protect existing volunteer tree seedlings and saplings from the
sediment removal operations.
After the sediment has been removed, the wetted perimeter will be seeded
according to the following requirements:
A. SEEDBED PREPARATION AND SEEDING SPECIFICATIONS -
Wetland Areas
1. Surface water control measures to be installed according to plan
2. Areas to be seeded shall be ripped and spread with available topsoil 6"
deep. Total seed bed prepared depth shall be 6" to 8" deep.
3. Loose rocks, roots and other obstructions shall be removed from surface
so that they will not interfere with establishment and maintenance of
vegetation. Surface for final seedbed preparation, at finish grades
shown, shall be reasonably smooth.
4. Provide agricultural lime at rate required to bring soil acidity to slightly
acid - ph 6, according to soil test report.
5. Lime and fertilizer shall be applied uniformly and mixed with the soil
during seedbed preparation.
6. Apply 0-20-10 commercial fertilizer at the rate of 20 Ibs/1,000 s.f. for
warm season mix (see schedule).
7. Apply 10-20-10 commercial fertilizer at the rate of 20 Ibs/1,000 s.f. for
cool season mix (see schedule).
8. Apply 10-10-10 commercial fertilizer at the rate of 20 Ibs/1,000 s.f. for
temporary cover crops. In addition, provide 15 Ibs/1,000 s.f. of
superphosphate.
9. The following is for the warm season mix:
a. All warm grass seed shall be debearded or conditioned by
brushing to create a product nearly the same as bedearding. This
does not apply to Switchgrass.
MAPA 2 of 4
. ta - I%
McNeely Associates pa
b. Disc two times to break-up crop residue and dirt clods prior to
seeding.
C. Pack soil to create a firm seedbed with a cultpacker or roller.
d. If a rain shower should fall after the seedbed is prepared but
before planting break-up any crust formation.
e. Seeding shall be installed to a depth of 1/4" utilizing a rangeland
drill or conventional grass drills. It is extremely important that seed
not be planted deeper than 1/4" depth. Do not disc or harrow after
seeding. This will put the seed too deep. A Brillion seeder will be
acceptable.
10. Seed in accordance with the following schedule and application rates:
Dates Types Rate
April 1 - July 15 Warm Season Mix
Switchgrass, Cave-
in-rock, Alamo 8 pts #/acre or 4 oz/1000sf
Smartweed 2 bulk #/acre or 1 oz/1000sf
and
Japanese Millet or 20 lb/acre or 1/2 Ib/1000sf
Sorghum Sudan Grass
Hybrids
(Mow prior to maturity)
July 16 - Sept. 1 Temporary crop of 20 lb/acre or 1/2 lb/1000sf
Sorghum Sudan Grass
Hybrids (To be followed
by permanent mixture)
Sept. 2 - Nov.1 Cool Season Mix
Reed Canary Grass 12 bulk #/acre or 6 oz/1000sf
Smartweed 2 bulk #/acre or 1 oz/1000sf
Nov. 1 - March 31 Temporary Crop of 40 lb/acre
(To be followed by
permanent mixture)
11. Contractor shall be required to provide a permanent mixture according to the
schedule.
12. Temporary crops must be incorporated prior to seeding of permanent mixtures.
13. Cover crops or temporary crops must be mowed at proper times to prevent
seed heads from maturing. Wheat may be harvested.
14. Grass mix and temporary covers shall be mulched with straw applied at the rate
MAPA 3 of 4

McNeely Associates pa
of 75 Ibs to 100 Ibs/1000sf. Use clean Wheat Straw.
15. If hydroseeded use Virgin Paper Mulch only.
Note:
Seed and additional information for the wetland mix as well as for other grass
areas may be purchased from, but not limited to:
Sharp Brothers Seed Company
Route 4, Box 237 A
Clinton, Missouri 64735
Phone [phone]
Contact: Jef Hodges
16. Wetlands crossings shall be covered with "Terra Jute erosion control netting or
equal installed per manufacturer directions.
Local Distributor:
Web Tec, Inc.
PO Box 240302
Charlotte, NC 28224
1-800-438-0027 or 704-552-6722
Should evidence downstream indicate a problem with the principal spillway, the
rip-rap apron at the outlet shall be inspected for any damage. The size and
elevation of the basin, dam and spillway shall also be inspected to ensure it
meets design specifications. Any erosion damage or other problems found
shall be repaired immediately.
MAPA 4 of 4
.!' l ~
McNeely Associates pa
BBB High School
Stormwater Management
Operations and Maintenance Manual
A. LOCATION:
BBB High School
Carpenter-Upchurch Road
Cary, NC
B. OWNERS:
C'S
C.
Wake County Public School System: Town of Cary:
BBBHS
5/12/97
Contact: Ms. Mary Barry
Parks & Recreation Dept.
Building B
Town Hall Campus
Cary, NC 27512-8005
469-4061
Contact: Mr. Spencer Graves
Facilities Building
1551 Rock Quarry Rd.
Raleigh, NC, 27610
856-08280
RECEIVING WATER BODY:
Crabtree Creek
D. INSPECTIONS:
The stone filter dam (Area A) and the farm pond dam (Area B) will be inspected
following a heavy rain and at least twice per year. Debris will be removed from
the spillway, displaced rip-rap or stone will be replaced and the "draw down" '
time will be monitored and confirmed to be between 24 and 48 hours from a full,
static ponded condition.
E. DRAW-DOWN TIMING:
If the draw-down time is found to be less than 24 hours or more than 48 hours,
modifications will be made to bring the timing within acceptable limits.
MAPA 1 of 4

McNeely Associates pa
F. MAINTENANCE:
Volunteer grasses and plant material will = be mown and will be allowed to
'naturalize'.
Formula 10-10-10 fertilizer at a rate of 10 Ibs/1000sq.ft. will be broadcast over
the wetted perimeter area in the Spring for the first two (2) years after the school
opens.
No herbicides will be used within the wetted perimeter of either area.
When sediment accumulates to one-half the design depth, this sediment will be
removed and the basin will be restored to original dimensions. Every attempt
will be made to protect existing volunteer tree seedlings and saplings from the
sediment removal operations.
After the sediment has been removed, the wetted perimeter will be seeded
according to the following requirements:
A. SEEDBED PREPARATION AND SEEDING SPECIFICATIONS -
Wetland Areas
1. Surface water control measures to be installed according to plan
2. Areas to be seeded shall be ripped and spread with available topsoil 6"
deep. Total seed bed prepared depth shall be 6" to 8" deep.
3. Loose rocks, roots and other obstructions shall be removed from surface
so that they will not interfere with establishment and maintenance of
vegetation. Surface for final seedbed preparation, at finish grades
shown, shall be reasonably smooth.
4. Provide agricultural lime at rate required to bring soil acidity to slightly
acid - ph 6, according to soil test report.
5. Lime and fertilizer shall be applied uniformly and mixed with the soil
during seedbed preparation.
6. Apply 0-20-10 commercial fertilizer at the rate of 20 Ibs/1,000 s.f. for
warm season mix (see schedule).
7. Apply 10-20-10 commercial fertilizer at the rate of 20 Ibs/1,000 s.f. for
cool season mix (see schedule).
8. Apply 10-10-10 commercial fertilizer at the rate of 20 Ibs/1,000 s.f. for
temporary cover crops. In addition, provide 15 Ibs/1,000 s.f. of
superphosphate.
9. The following is for the warm season mix:
a. All warm grass seed shall be debearded or conditioned by
brushing to create a product nearly the same as bedearding. This
does not apply to Switchgrass.
MAPA 2 of 4
• l
McNeely Associates pa
b. Disc two times to break-up crop residue and dirt clods prior to
seeding.
C. Pack soil to create a firm seedbed with a cultpacker or roller.
d. If a rain shower should fall after the seedbed is prepared but
before planting break-up any crust formation.
e. Seeding shall be installed to a depth of 1/4" utilizing a rangeland
drill or conventional grass drills. It is extremely important that seed
not be planted deeper than 1/4" depth. Do not disc or harrow after
seeding, This will put the seed too deep. A Brillion seeder will be
acceptable.
10. Seed in accordance with the following schedule and application rates:
Dates TyP_es B-=
April 1 - July 15 Warm Season Mix
Switchgrass, Cave-
in-rock, Alamo 8 pts #/acre or 4 oz/1000sf
Smartweed 2 bulk #/acre or 1 oz/1000sf
and
Japanese Millet or 20 lb/acre or 1/2 lb/1 000sf
Sorghum Sudan Grass
Hybrids
(Mow prior to maturity)
July 16 - Sept. 1 Temporary crop of 20 lb/acre or 1/2 lb/1 000sf
Sorghum Sudan Grass
Hybrids (To be followed
by permanent mixture)
Sept. 2 - Nov.1 Cool Season Mix
Reed Canary Grass 12 bulk #/acre or 6 oz/1000sf
Smartweed 2 bulk #/acre or 1 oz/1000sf
Nov. 1 - March 31 Temporary Crop of 40 lb/acre
(To be followed by
permanent mixture)
11. Contractor shall be required to provide a permanent mixture according to the
schedule.
12. Temporary crops must be incorporated prior to seeding of permanent mixtures.
13. Cover crops or temporary crops must be mowed at proper times to prevent
seed heads from maturing. Wheat may be harvested.
14. Grass mix and temporary covers shall be mulched with straw applied at the rate
MAPA 3 of 4
4
J • ? w. -9
McNeely Associates pa
of 75 Ibs to 100 Ibs/1000sf. Use clean Wheat Straw.
15. If hydroseeded use Virgin Paper Mulch only.
Note:
Seed and additional information for the wetland mix as well as for other grass
areas may be purchased from, but not limited to:
Sharp Brothers Seed Company
Route 4, Box 237 A
Clinton, Missouri 64735
Phone [phone]
Contact: Jef Hodges
16. Wetlands crossings shall be covered with "Terra Jute" erosion control netting or
equal installed per manufacturer directions.
Local Distributor:
Web Tec, Inc.
PO Box 240302
Charlotte, NC 28224
1-800-438-0027 or 704-552-6722
Should evidence downstream indicate a problem with the principal spillway, the
rip-rap apron at the outlet shall be inspected for any damage. The size and
elevation of the basin, dam and spillway shall also be inspected to ensure it
meets design specifications. Any erosion damage or other problems found
shall be repaired immediately.
MAPA 4 of 4