20000141 Ver 1_COMPLETE FILE_20000222

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
July 31. 2000
Durham Count.
DWQ Project tt 000141
APPROVAL of 401 Water Quality Certification and ADDITIONAL CONDITIONS
Mr. David & Tina Lee
3902 Sweeten Creek Road
Chapel Hill, NC 27514
Dear Mr. And Mrs. Lee:
You have our approval, in accordance with the attached conditions and those listed below, to place fill material in 0.13 acres of wetlands
and 228 linear feet of streams for the purpose of constructing the Renaissance Center at South point near SR 1118 and SR 1105 as described in
your revised application dated July 7, 2000. After reviewing your application, we have decided that this fill is covered by General Water .
Quality Certification Number 3108. This certification allows you to use Nationwide Permit Number 26 when the Corps of Engineers issues it.
In addition, you should get any other federal, state or local permits before you go ahead with your project including (but not limited to)
Sediment and Erosion Control. Coastal Stormwater, Non-Discharge and Water Supply Water shed regulations. This approval will expire when
the accompanying 404 or CAMA permit expires unless otherwise specified in the General Certification.
This approval is only valid for the purpose and design that you described in your application except as modifi,;d below. If you change
your project. you must notify us and you may be required to send us a new application. If the property is sold, the new owner must be given a
copy of this Certification and approval letter and is thereby responsible for complying with all conditions. If total wetland fills for this project
(now or in the future) exceed one acre, compensatory mitigation may be required as described in 15A NCAC 2H .0506 (h) (6) and (7). For this
approval to be valid, you must follow the conditions listed in the attached certification and any additional conditions listed below.
1. Deed notifications or similar mechanisms shall be placed on all remaining jurisdictional wetlands and streams to notify the state in order
to assure compliance for future wetland and/or water impact. These mechanisms shall be put in place within 30 days of the date of this
letter or the issuance of the 404 Permit (whichever is later).
2. An additional condition is that a final, written stormwater management plan shall be approved by this Office before the impacts specified
in this Certification occur. The stormwater management plan must include plans and specifications for stormwater management facilities
designed to remove 85% TSS according to the most recent version of the NC DENR Stormwarer Best Management Practices Manual.
Also, before any permanent building is occupied at the subject site, the facilities, as approved by this Office, shall be constructed and
operational, and the stormwater management plan, as approved by this Office, shall be implemented.
If you do not accept any of the conditions of this certification. you may ask for an adjudicatory hearing. You must act within 60 days of
the date that you receive this letter. To ask for a hearing, send a written petition, which conforms to Chapter 1508 of the North Carolina
General Statutes to the Office of Administrative Hearings, P.O. Box 27447, Raleigh, N.C. 276 1 1-7447. This certification and its conditions are
final and binding unless you ask for a hearing.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions.
please telephone John Dorney at 919-733-9646.
Attachment
cc: Corps of Engineers Raleigh Field Office
Raleigh DWQ Regional Office
File copy
Central Files
Todd St. John
Wendell Overby; Soil & Environmental Consultants
Si e y, Lu?v
tevens
la
Division of Water Quality • Non-Discharge Branch
1621 Mail Service Center Raleigh NC 27669-1621 Telephone [phone] FAX # [phone]
An Equal Opportunity Affirmative Action Employer •
50% recycled/10% post consumer paper
DWQ Project #000141
Subject: DWQ Project #000141
Date: Mon, 24 Jul 2000 10:59:33 -0400
From: Charles Brown <char][e-mail]>
To: "Todd St. John" <[e-mail]>
Todd,
The new plans look alot better than they were. I have no problems in
issuing a permit for this project as long as the discharge from the
stormwater pond on the north side does not go into the wetland area.
Charles Brown I
00
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I of 1 7128/00 7:10 AM
Re: Renaissance Center at Southpoint
Subject: Re: Renaissance Center at Southpoint
Date: Tue, 18 Jul 2000 14:08:34 -0400
From: Charles Brown <charles. brown@ncmail. net>
To: "Todd St. John" <[e-mail]>
Todd,
Do you have new plans for the site. I want to see which wetlands they are
avoiding.
Charles
"Todd St. John" wrote:
> DWQ# 000141
> If you remember this project, we had placed it on hold for avoidance and
> minimization per our conversation on 4120100. The applicant has reduced
> impacts from 347 feet of "unimportant" stream and 0.45 acres of wetland
> to 228 feet of stream and 0.13 acres of wetland. Please advise if you
> think we can issue or not...
> thanks
/z ?6w a
1 of 1 7/21/00 9:47 AN
Renaissance Center at Southpoint
Subject: Renaissance Center at Southpoint
Date: Tue, 18 Jul 2000 10:02:10 -0400
From: "Todd St. John" <[e-mail]>
Organization: DWQ Wetlands Unit
To: charles brown <[e-mail]>
CC: "john.dorney" <[e-mail]>
DWQ# 000141
If you remember this project, we had placed it on hold for
minimization per our conversation on 4/20/00. The applicant
impacts from 347 feet of "unimportant" stream and 0.45 acre
to 228 feet of stream and 0.13 acres of wetland. Please adv
think we can issue or not...
thanks
Todd St. John, P.E.
Environmental Engineer II
DWQ
Wetlands Unit
avoidance and
has reduced
s of wetland
ise if you
t of 1 7/18/00 10:04 AM
NCDENR-DWQ
Attn: Mr. John Dorney
4401 Reedy Creek Rd.
Raleigh, NC 27607
Environmental Consultants, Inc.
Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
9.10 W
JUL 7 2000
July 7, 2000
S&EC, Inc. Project #99-3694
1 A?
Dear Mr. Dorney: TE LANDS GROUP
WATER UF.UTY SECT-
The purpose of this letter is to revise requested wetland impacts for the project known as Renaissance
Center at Southpoint. An earlier Pre-Construction Notification was sent to your office February 21, 2000
for this project. The February 401 Certification request was put on hold by your office (DWQ Project
#000141) in a letter dated April 20, 2000.
The property is located east of Fayetteville Road (SR 1118) south of Herndon Road (SR 1105)
approximately 1/2 mile south of Interstate 40 in Durham County, NC (NC Grid N-784143, E-2018926).
Two stormwater ponds are proposed for construction. Design calculations for the stormwater ponds will be
sent to your under by the project engineer under separate cover.
Based on the comments/recommendations of your office, the project engineer has revised the requested
impacts as follows:
Impact 1 now involves 80 if of unimportant channel (160sf)
Impacts 2-6 are no longer requested (avoidance)
Impacts 7-9 remain as previously requested
Impact 7 = 1304 sf,
Impact 8 = 3821 sf,
Impact 9 = 1481f unimportant channel (442 sf)
Total requested project impacts after this revision = 228 if unimportant channel and 5727sf (0.13ac)
Included with the original PCN were: (1) a completed Pre-Construction Notification Application, (2)
Agent Authorization Form, (3) USGS Site Vicinity Map, (4) Construction Plans, (5) Wetland Delineation
Forms, (6) Stormwater Pond Calculations and a check for $475.00 to cover the DWQ permit application
fee. According to the project engineer stormwater pond calculations for the revised impacts are the same
specifications as previously submitted. S&EC believes no mitigation should be required for the requested
impacts. However, if for some reason mitigation is required, our client proposes payment into the North
Carolina Wetland Restoration Fund.

Included with this cover letter please find 1) a wetland impact justification letter from the project
engineer, 2) revised construction plans (11"x17").
Please call if you have questions or require further information. If you intend to erform site visits please t?1
call and we will arrange for someone to accompany you.
Sincerely, 4 6 OKD?
Wendell Overby
Wetland Delineation/Permitting/Mitigation Soil/Site Evaluations On-Site Septic Systems . _ Environmental Assessments/Audit
Neuse Basin and Watershed Buffer Evaluations Groundwater Hydrology Endangered Species
Charlotte Office: [phone] • Hickory Office: [phone]
*!L I
THE JOHN R. McA,DA,MS COMPANY, INC.
William H. Derks, PE PL-
June Director C I G /?Q ?J ??v,,nn?'1 ?
Land Development Services Group `
29, 2000 ( Mr. John R. Dorney
NCDENR - Division of Water Quality
Wetlands / 401 Unit
1621 Mail Service Center
Raleigh, North Carolina 27669-1621
Re: Renaissance Center
DWQ Project # 000141
MDL-99000
SIl ?F7 ?6
k, 0 U 'r
72000
! WETLANDS G?0UP
WATER tittLITY s!-CT;!'
Dear Mr. Dorney:
This re-submittal is in response to your letter of April 20, 2000 indicating denial
of our original impact request and recommending the avoidance of several waters
and/or wetland areas. I apologize for the tardiness of this response but the
proposed plan for this project has gone through several intermediate revisions to
address the concerns of the Durham City / County Planning Department and the
City of Durham and North Carolina Department's of Transportation. During this
process the concerns of the Division of Water Quality have also been kept in the
forefront to insure that the eventual plan that resulted would address the concerns
expressed in your letter.
The Division of Water Quality requested that we look at the possibility of
eliminating impacts to areas 2, 3, 4, 5, 6, 8 and 9. The new plan addresses the
avoidance of 2, 3, 4, 5, and 6. Unfortunately, we were unable to eliminate the
impacts to areas 8 and 9 as requested.
Impacts 8 and 9 occur at the very narrowest portion of the project. Obviously, the
attraction of this site for development is the proximity to the interchange at I-40
and Fayetteville Road and secondly the intersection of Fayetteville Road and
Herndon Road. The retail portion of this mixed-use project is therefore located
facing Fayetteville Road and in the northern end of the project nearest to Herndon
Road. The topography of the site falls approximately 38 feet from Fayetteville
Road to the back of the site. The constraints constructing grades to adequately
address both the reality of a parking lot and also handicap accessibility necessitate
providing as much room as possible between Fayetteville Road and the main
retail arc.
CIVIL ENGINEERING • LAND PLANNING • SURVEYING
PO Box 14005 • Research Triangle Park, NC 27709 • [phone] • fax[phone]
www.johnrmcadams.com
. , r%. .
Since /979
THE JOHN R. McADAMS COMPANY, INC.
Mr. John R. Dorney
June 29, 2000
Page Two
Therefore, we respectively request that the relocation of the stormwater pond off
the initial impacts 2, 3, 4, 5 and 6 be acknowledged and that it be understood that
the constraints of the parcel and retail design be recognized and impacts 8 and 9
be permitted.
Sincerely,
THE JOHN R. McADAMS COMPANY, INC.
7q kdt-z(
William H. Derks, P.E.
Director Land Development
WHD:jsh
c: John I. Silverman
Wetlands Tracking
Facility Name Renaissance Center at Southpoint c/o David & Tina Lee I County Durham
Project Number 00 0141 County2
0Inactive Region Raleigh J
Project Type purpose of residential & commercial DCM Office
Location Crooked Creek I COE Office Raleigh
Inspections/ Violations
Inspection Date Inspector
Compliant
Total for Project:
Letter Type Date Sent Reply Date Current St
M-M
r
?F Inspect.
,r

401s Last Total Total Total Mit Recvd Sent to Recvd Action 401 401 Totals Mit
Recvd From Date Region Region Date Last Action Acres Feet Acres Feet
State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
A L11?•
NC ENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
April 20, 2000
DWQ Project # 000141
Wake County
CERTIFIED MAIL-RETURN RECEIPT REQUESTED
David and Tina Lee
3902 Sweeten Creek Road
Chapel Hill, NC 27514
Dear Mr. And Ms. Lee:
The Division of Water Quality has reviewed your plans for the discharge of fill material into 0.45 acres of
wetlands (0.216 acres indicated in application) and 347 linear feet of streams located east of Fayetteville and south of
Herndon Road approximately ''/s mile south of 140 in Durham County for a proposed commercial and residential
development as described in your application dated February 21, 2000. Insufficient evidence is present in our files to
conclude that your project must be built as planned in waters and/or wetlands in accordance with 15A NCAC 2H
.0506. Therefore, unless modifications of the proposal are made as described below, we will have to move toward
denial of your 401 Certification as required by 15A NCAC 2H.0507(e) and will place this project on hold as
incomplete until we receive this additional information, we are requesting (by copy of this letter) that the U.S. Army
Corps of Engineers place your project on administrative hold.
Please provide us with information supporting your position that states your project must be constructed as
planned and that you have no practicable alternative to placing fill in these waters and/or wetlands. Specifically can
the pond proposed to impact wetlands and streams numbered 2, 3, 4, 5, and 6 be moved or redesigned so that the
pond would not impacts these wetlands or streams? Also, can the road be realigned and the building moved to avoid
the impacts to wetland 8 and stream 9? Any documentation such as maps and narrative that you can supply to
address alternative designs for your project may be helpful in our review of your 401 Certification. Please indicate all
impacts to jurisdictional waters and wetlands on fiill sized plans of at least 50:1 scale that show layouts of buildings,
parking fill slopes, etc., so that this Office can review if the proposed impacts are necessary. Also this project may
require compensatory mitigation as described in 15A NCAC 2H.0506(h).
Please respond within three weeks of the date of this letter by sending a copy of this information to me and
to the Charles Brown, in the Raleigh Regional Office at 3800 Barrett Dr., P.O. Box 27687, Raleigh, NC 27609. If
we do not hear from you in three weeks, we will assume that you no longer want to pursue this project and we will
consider the project as withdrawn. I can be reached at 919-733-9646 if you have any questions.
- John R. orney
cc: Raleigh DWQ Regional Office
Central Files
He Copy
Raleigh Field Office Corps of Engineers
Wendell Overby, S&EC Inc., 244 West Mllbrook Rd., Raleigh, NC 27607
Wetlands/401 Unit1621 Mail Service Center Raleigh, North Carolina 27669-1621
Telephone [phone]FAX # [phone]
An Equal Opportunity Affirmative Action Employer
val. -1 -4 nnv.'--t,.....-,......b-

Environmental Consultants, Inc.
< Road • Raleigh, North Carolina 27609 • Phone: [phone] • Fax: [phone]
Web Page: www.SandEC.com

US Army Corps of Engineers-Regulatory
Attn: Mr. Todd Tugwell
6508 Falls of Neuse Road, Suite 120
Raleigh, NC 27615
Dear Mr. Tugwell and Mr. Dorney:
February 21, 2000
S&EC, Inc. Project #99-3694
NCDENR-DWQ
Attn: Mr. John Dorney
4401 Reedy Creek Rd.
Raleigh, NC 27607
The purpose of this letter is to request the use of Nationwide Permit 26 for the project known as
Renaissance Center at Southpoint. The property is located east of Fayetteville Road (SR 1118) south of
Herndon Road (SR 1105) approximately 1/2 mile south of Interstate 40 in Durham County, NC (NC Grid
N-784143, E-2018926). The site is shown on the attached plans and USGS Topo Quad vicinity map.
Proposed impacts to jurisdictional waters will total 0.216 acres. Construction of the residential/commercial
community will comply with all of the general conditions stated within Nationwide Permit 26. Two
stormwater ponds are proposed for construction.
S&EC believes mitigation will not be required for this project. The project's total permanent impacts under
Nationwide Permit 426 equal 0.216 acres (i.e., less than I acre). So, no wetland mitigation will be
required. Proposed channel impacts equal 347 linear feet. S&EC believes stream mitigation will not be
required for this project because impacts are proposed for non-significant channels. If for some reason
mitigation is required, our client proposes payment into the North Carolina Wetland Restoration Fund.
Included are: (1) a completed Pre-Construction Notification Application, (2) Agent Authorization Form, (3)
USGS Site Vicinity Map, (4) Construction Plans, (5) Wetland Delineation Forms, (6) Stormwater Pond
Calculations and a check for $475.00 to cover the DWQ permit application fee.
Please call if you have questions or require further information. If you intend to perform site visits please
call and we will arrange for someone to accompany you.
Sincerely,
Wendell Overby `
wo 'FLIR nA;MENY 2>
R?CEIVEO ?' ? ,.,,
"'riland Uclun ;i(unil'rlit III ill"'Aliti!,Mmli Sail-Site l:Aaluations On Site Septic Svslcm? Ftivimnmcntal Asscssmcnts/Audits
Ncww Basin and Watershed liuttcl Fvaluations Groundwater 1lydrolm'y Fildangered Species
liruic h (MI, ti ?tinnlt ('nllr? r \?cnuc • Nrwlnn, NC 2x6')x Phone (S.') 16(, ?.101 • kix (82h) 406-7406
{
DWQ ID:
Corps Action ID:
Nationwide Permit Requested (Provide Nationwide Permit #): 26
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 NC Division of Environmental Management (see agency addresses sheet). PLEASE
PRINT.
1. Owner's Name: David and Tina Lee
2. Mailing Address: 3902 Sweeten Creek Road
Subdivision Name:
City: Chapel Hill State: NC Zip Code
27514
Project location address, including subdivision name (if different from mailing address
above): East of Fayetteville Road (SR1118) south of Herndon Rd (SR1105 , approx.
1/4 mile south of Interstate 40 in Durham County (see map).
3) Telephone Number (Home)
408-8228
(Work):
4) If applicable, agent's name or responsible corporate official, address, phone
number:
Soil & Environmental Consultants, Inc. Phone: [phone]
244 West Millbrook Road
Fax: [phone]
Raleigh, NC 27609
5. Location of work (provide a map, preferable a copy of USGS topographic map or
aerial photograph with scale):
County: Durham
Nearest town or city: Durham
Specific Location (include road numbers, landmarks, etc.):
East of Fayetteville Road (SR1118) and south of Herndon Rd (SR1105)
approx. 1/4 mile south of Interstate 1-40
6. Impacted or nearest stream/river: Crooked Creek
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-1 or WS-
II)? YES ? NO ® If yes, explain:
7b. If the project is 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? n/a
8a. Have any Section 404 permits been previously requested for use on this property?
YES ? NO ® If yes, provide Action ID number of pervious permit and
any additional information (including photocopy of 401 certification).
8b. Are additional permit requests expected for this property in the future?
YES ? NO ® If yes, describe anticipated work:
9a. Estimated total number of acres in tract of land:
33.22
9b. Estimated total number or acres of wetlands located on project site: 0.82
10a. Number of acres of wetlands impacted by the proposed project by:
Filling: 0.135
Flooding:
Drainage:
Excavation: 0.08
Other:
Total acres to be impacted: 0.215
10b. (1) Stream channel to be impacted by the proposed project (if relocated,
provide distance both before and after relocation):
Length before: n/a
Width Before (based on normal high water contours): n/a
Width After: n/a
Average depth before:
n/a
After: n/a
(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: Lot fill (347 linear ft); all impacts to non-significant channels
11. If construction of a pond is proposed, what is the size of the watershed draining to
the pond? pond a) 15.4 acres pond b) 32.4 acres
What is the expected pond surface area? pond a)21,260 -,f op nd b) 44,140 sf
12. Description of proposed work including discussion of type of mechanical
equipment to be used (attach plans 81/2" x 11" drawings only):
Construction of commercial / residential community including infrastructure:
After: n/a
roads, stormwater ponds
13. Purpose of proposed work: Construction of commercial / residential community
14. State reasons why it is believed that this activity must be carried out in wetlands
(include any measures taken to minimize wetland impacts): Avoidance of
'important' streams. Addition of larger ponds than impacted.
15. You are required to contact the U.S. Fish and Wildlife Service (USFWS) and/or
National Marine Fisheries Service (NMFS) (see agency 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: (attach responses from these agencies).
to be handled by USACE
16.
You are required to contact the state historic preservation officer (SHPO) (see
agency address sheet) regarding the presence of historic properties in the permit
area which may be affected by the proposed project. Date contacted:
to be handled by USACE
17. Does the project involve an expenditure of public funds or the use of public (state)
land?
YES ? 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 ? NO ?
b. If yes, has the document been reviewed through the North Carolina
Department of Administration State Clearinghouse?
YES ? NO ?
If answers 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].
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, representative photograph 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 used of surrounding property? commercial and residential
f. If applicable, what is proposed method of sewage disposal?
sanitary sewer
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 tVNth arolinaCoastal Management program.
Z/2!/ca
Owner's/Agent're Date
(Agent's signature valid only if Agent Authorization Letter from the owner is provided
(18 g.))
,, c1* i as m..,. ,...? ..?.. --- v.. ... .__ .._.__., ....._ ..-
Soil & Envirorilenta Consultants, Inc,.
2e44 Vest m mbrook Road M Raleigh. Noah Csrelina 27609 ¦ (919) 846-59W a Fax [phone].
AGENT AUT'R0FJZA.T10N FORM
All Blanks To Fil ed_ B e Current i dewner
Name:
nn /..__0 Al a r?lr ?7 s/9-
p),one:
Project Name / Description: ?.
Date:
The Depa meint of the Army toa District
U.S. Anwy Co tps of Fngiraeers. Wilnt g
p.p. Box
Wilmington, NC 28402
Attn:
Fields Office: [ZR t t; I G ?'
Re: Wetlands Related CoTtsulftg And Permi%bng
To Whom It h lny ConMern:
une
I, the current pMpgM owner. hereby desipate and author Soil & FAviratz?tal Car+gultarits, Ixtc. to
t m the processing of pe=rt applications, to fu?h upon request
act in my b?jWf as my agett
suppiQIItental information in support of atppucatfntts, err. fxorn ihis day forward, The ?- aY of
q
MAY _.S
This notification sepersedes any previous correspondence ConcA=%iX19 the gent for this project.
TTO?TCE This autltorimfiort, fur Uability aLud Fmfemlonal courte°y reasons, is vapid only for
when accatapanied by S&EC staff. Xatt should call WEC
Sov,rxnment officials to Lmter the prepCttY
Bite.
to arrange a site meeting prior to Asit?g the - A V t D 1 n: A- ?e I'rmpert}, pK,nez's 5ignaturc
prixtt property owners Name
cc: Mr- Kevin maxtxo
Mr john Dorney
NCD)~14 & NR -'f)WQ. Water 2?.aliry Plaluurtg soil & Fxtvironmental Consultants, (ric-
49,01 Reedy Creek Road asent.im•,
Ra).eigh, NC 27607
Soil/Site E\'itu?tion :.J 14apping and Physical Analysis N Wetlands Mapplp?g an(; Mittgat:on 0 EnVironmental Atid.
011_5'U: %wustc Treatment S•rstems. Ev.,11ontton and Design
?1`?•? Ili ?,I?\ ???? AA -
Midland Atlantic Properties
Fayetteville Rd Tract SOUTHWEST DURHAM QUADRANGLE t '?' ?( lr
1
May 1999 NORTH CAROLINA 0.
S&EC #3694 7,5 MINUTE SERIES (TOPOGRAPHIC)
NW/4 DURHAM SOUTH IS' QUADRANGLE
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U )1111) I INI_S RI.PRESf NI `) iOf) I 1:UNI(IUI2`-;
t`IAIIONAI G1 00t TIC Vf_RIICAI UAIIIM OI P)?')
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IHf', %IAP , OMIT It'' WIIII NAIIONAt MAT' rVlj_ r,, , nlrU`,
TOIL SALE BY U 5_ GEOLO(III(:AI ) OItVI Y
ULNVI Ii, (1OLOHADO 80221!) OR fif 51ON Vlli({INIA )70`.)2
%, IOI UI H UI-`ICHWI? (, I(W06RAPHIC MAT".; AND ';YNIk(W., " vVAIIAH1I UN 10 11111',1
Delineation Performed by: Soil & Environmental Consultants, Inc.
244 West Millbrook Road 231 16th Avenue NE
12aleigh, NC 27609 Hickory, NC 28601
Phone: [phone] Phone: [phone]
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
Project/Site: DVAt *A& OfF'ICC Date: '4&
Applicant/ Owner: KN L- !!kAr *rM County: buRMAM
Investigator: _W. aVERR`L_ State: Nt
Do normal circumstances exist on the site?
Is the site significantly disturbed
(A typical situation)?
Is the area a potential problern area?
(If needed, explain on reverse.)
VEGETATION
Dominant Plant Species Stratum Indicator
1.CARek R-. HERO
2J0NCwf 9M-k6VS 901jr foe-w+
1wae0w"014% AWou1 M et# -CftL
4xa.*W! Aofirgt AO ?T_ FAC4V
5ACM 1tV15AVr% 91t0p FiK
6.F0*rr/v1 1'Ic M%Y(W * - M8f FAC?
7NQVtDAwKAIt- j'WA@w to '1K?t W4
8& 41VU-C S NI&" "Met _F641"-
n No Community ID:
Yes (0 Transit ID:
Yes d!?P Plot ID: _ WE'1&-ANb
Dominant Plant Species
9.(wettLus ?"IrUbs
l o lywotcNkpm
11. RAl'ICA01
12.
1
1
1
Stratum Indicator
,ftie6 FACM/-
nFRR FAe-
Percent of dominant species that are OBL, FACW or FAC (excluding FAC-):
100
Remarks:
HYDROLOGY
Recorded Data (describe in remarks)
Stream, Lake or Tide Gauge
Aerial Photographs
Other
A_ No Recorded Data Available
Field Observations:
Depth of Surface Water:
Depth to Free Water in Pit:
Depth to Saturated Soil: O ? $ ____ (in.)
Wetland Hydrology Indicators:
Primary Indicators:
x Inundated
K Saturated in Upper 12 Inches
Water Marks
Drift Lines
Sediment Deposits
Drainage Patterns in Wetlands
Secondary Indicators: (2 or more required)
Oxidized Root Channels in
Upper 12 Inches
Water-Stained Leaves
Local Soil Survey Data
?t FAC Neutral Test
Other (explain in remarks)
Remarks:
e5P15TUctsr y. t rAt>rNd Yo
I IJt?IJ c»I O N o chmi Ac-re-D ,AREAS. Qu ES-1I* N AS To
WKC''MCIL W(:C ISot'A'ro 0& NoT
WLdata.frm
SOILS
Map Unit Name
(Series and Phase): WG W kee Drainage Class:
Field Observations
Taxonomy (Subgroup): 'Tyr,?- FjQvf xjua60i Confirm Mapped Type? `W No
Profile Description:
Depth Matrix Color
(ins.) I lorizon (Munsell Moist)
O.:i? A- WYR A
`f-It 15 to VOL 7A
Mottle Colors Mottle
(Munsell Moist) Abundance/ Contrast
Texture Concretions,
Structure etc.
SL
${GL
Hydric Soil Indicators:
Histosol
Histic Epipedon
Sulfidic Odor
? Aquic Moisture Regime
? Reducing Conditions
v Gleyed or Low-Chroma Colors
V Concretions
High Organic Content in Surface Layer in Sandy Soil
Organic Streaking in Sandy Soils
_& Listed on Local Hydric Soils List
? Listed on National Hydric Soils List
Other (explain in remarks)
Remarks:
Sow,e Af-CAS W1 s'.+ND1' -r6Y1-V -Vb sO2F ACCC
Wetland Determination
(circle yes or no)
Hydrophytic Vegetation Present? (M No
Wetland Hydrology Present? M No
Hydric Soils Present? C9 No
Is This Sampling Point Within a Wetland? 69 No
Remarks:
c
•r,
„N
.rk??i.aef,i J
WLdata.frm
Delineation Performed by: Soil & Environmental Consultants, Inc.
244 West Millbrook Road 231 16th Avenue NE
Raleigh, NC 27609 Hickory, NC 28601
Phone: [phone] Phone: [phone]
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
Project/ Site: Pultmetr ofFILr Date: 414
Applicant/Owner: Jotloi 1.At'CAS?6R County: bog "P%1"
Investigator: W/.OVCRSy State: WC
Do normal circumstances exist on the site?
Is the site significantly disturbed
(A typical situation)?
Is the area a potential problem area?
(If needed, explain on reverse.)
VEGETATION
No Community ID:
Yes 119 Transit ID:
Yes dZ> Plot ID: 0 f L*W 0
Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator
1.c0kXP?rtvVS CAIPoLINIAW SKt00 FA r, 9. CoRNtX 'FW1tlSA SHINS IF 64-V
24lftyff4>*«u j4fttFitA TRIF F? G 10%ASVANVK VEN1n ^ 4014EMP FAG
30QVIf,APAW IT0mrtd IWN_ Ac,* 11.
44. Woce*N JAO*Awjl ?LtiE IrAC- 12.
5.PQVNVS SEROTM 90 ;''-V 13.
6.ArM1n1WS V106*114W RffE _ FACy- 14.
7.'M&J VS TL f'pp --row W 15.
8rmVk"icmvm ftf y Fit 16.
AcIt,s't1GMn I pES
Percent of dominant species that are OBL, FACW or FAC (excluding FAC-): 60
Remarks:
HYDROLOGY
Recorded Data (describe in remarks)
Stream, Lake or Tide Gauge
Aerial Photographs
Other
K No Recorded Data Available
Field Observations:
Depth of Surface Water: (in.)
Depth to I'ree Water in I'it: (in.)
Depth to Saturated Soil (in.)
Remarks:
Wetland Hvdrologv Indicators:
Primary Indicators:
Inundated
Saturated in Upper 12 Inches
Water Marks
Drift Lines
Sediment Deposits
Drainage Patterns in Wetlands
Secondary Indicators: (2 or more required)
Oxidized Root Channels in
Upper 12 Inches
Water-Stained Leaves
Local Soil Survey Data
FAC Neutral Test
Other (explain in remarks)
WLdata.frm

SOILS
Map Unit Name
(Series and Phase): W H ITA? STo M Drainage Class: M01>ERRTLL4 WZ14-
Field Observations
Taxonomy (Subgroup): VFV T1G HAPL VDAt.fS Confirm Mapped Type?6ZD No
Profile Description
Depth Matrix Color Mottle Colors
(ins.) Horizon (Munsell Moist) (Munsell Moist)
b Y R s/3
6-to ?_ _ ?.sYRs/?
Syr, % 1.syK y/y
10 y It s/6
Hydric Soil_Indicators:
Histosol
Histic Epipedon
Sulfidic Odor
Aquic Moisture Regime
Reducing Conditions
Gleyed or Low-Chroma Colors
Mottle
Abundance/ Contrast
Texture Concretions,
Structure etc.
SL _
cI.
Concretions
High Organic Content in Surface Layer in Sandy Soil
Organic Streaking in Sandy Soils
Listed on Local Hydric Soils List
Listed on National Hydric Soils List
Other (explain in remarks)
Remarks:
Wetland Determination
(circle yes or no)
Hydrophytic Vegetation Present? 0§ No
Wetland Hydrology Present? Yes M
Hydric Soils Present? Yes ttM
Is This Sampling Point Within a Wetland? Yes d5'
WLdata.frm
1,
THE JOHN R. McADAMS COMPANY, INC.
RENAISSANCE CENTER
I-40 AND FAYETTEVILLE ROAD
SOUTH OF HERNDON ROAD
DURHAM, NC
PRELIMINARY WATER QUALITY POND
CALCULATIONS AND SUMMARY
MDL-99000
FEBRUARY 18, 2000
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CIVIL ENGINEERING LAND PLANNING SURVE'ING
PO Box 14005 • Research Triangle Park, NC 27709 • [phone] • fax [phone]
www.johnrmcadams.com
THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax[phone]
J R MCA JOB NO. Mm-.01900o DATE 4- - It ,6?0
CLIENT
SUBJECT
PROJECT
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(Date)
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THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax[phone]
?}y? ?
Z - I1-? PAGE OF
J R McA JOB NO DATE
BY IAtC - CHECKED BY
(Date)
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THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax[phone]
(? A n/1 PAGE OF
J R McA JOB NO DATE ^w BY V%C? CHECKED BY
(Date)
CLIENT PROJECT
SUBJECT
T,-= 70 ol'j.
Pa_?p ita11 : 50v-m vt?.
Tav'q__ 'DA = '32A0 A,-
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T = 32.do c- o,qo 1 G?.1= q?
(K67v5 ' SmeF*X C-A?L?A? W SA*tc PA*xae.,
A> Pam, Ito" ).
tA SiMM. vwj , ?c? Ae. CJ. C= o. ?o CaJ = qe,
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Pond A
Small Watershed Method Hvdroaranh Generation
(Rf.- "Elements of Urban Stormwater Design, H. R. Malcom, PE)
Drainage Area Description =_>
Total Drainage Area =
Impervious area = 12.32 AC @ c=
Open / Grassy / Landscaped Area = 2.59 AC @ c=
Wooded Area = 0.00 AC @ c=
Other undescribed area = 0.49 AC @ c=
0.95 and CN = 98.0
0.63 and CN = 80.0
0.00 and CN = 0.0
1.00 and CN = 100.0
Total DA = 15.40 AC c= 0.90 and CN = 95.0
Design Storm Description / Watershed Sensitivity =_>
Time of Concentration = 7.0 minutes
Tc methodology = Estimated, preliminary calculations
Enter known IN factors to compute the intensity, or enter a known intensity in the area
marked "known intensity". If known, clear all IN factors from the chart.
IDF Factors:
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
g 132 169 195 232 261 290
h 18 21 22 23 24 25
Calculated Intensities (do not enter known values here):
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
intensity 5.28 6.04 6.72 7.73 8.42 9.06
(in/hr)
Known Intensities (enter known values here if not calculating above, else enter zero):
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
Intensity 0.00 0.00 0.00 0.00 0.00 0.00
(in/hr)
Pond A
Design storm flowrates ==>
Flowrates are calculated using the rational method, and incorporating frequency
coefficients for the 25, 50, and 100 year storms. These frequency coefficients are
1.1, 1.2, and 1.25 respectively.
Calculated design flowrates:
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
Flowrates 73.00 83.45 92.97 117.61 139.68 156.62
(CFS)
Formulate hydrograph using step-function estimated SCS dimensionless UH ==>
Ultimate Soil Storage:
S = 0.52 inches
Precipitation Depths for 6 hr. design storm:
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
P-depth 2.65 3.38 3.90 4.62 5.19 5.75
(inches)
SCS runoff depth using default initial loss characteristics (0.2S and 0.8S):
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
Q* 2.11 2.83 3.34 4.05 4.61 5.17
(inches)
Time to peak for design hydrograph (for step-function hydrograph):
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
Tp 19.38 22.68 24.04 23.05 22.12 22.10
(minutes)
Resultant SWM design hydrographs ==>
2 year = 73.00 CFS @ 19.38 minutes
5 year = 83.45 CFS @ 22.68 minutes
10 year = 92.97 CFS @ 24.04 minutes
25 year = 117.61 CFS @ 23.05 minutes
50 year = 139.68 CFS @ 22.12 minutes
100 year = 156.62 CFS @ 22.10 minutes
Pond A
Water Quality Pond Design Sheet
Project Name: Renaissance Center
Designer: D.A. Clark
Job Number: MDL-99000
Date: 2/18/00

Contour
feet

Stage
feet
Contour
Area
SF Average
Contour
Area
SF Incremental
Contour
Volume
CF Accumulated
Contour
Volume
CF
278.0 0.0 21260
280.0 2.0 25220 23240 46480 46480
282.0 4.0 29909 27565 55129 101609
120000
100000
LL 80000
U
rn 60000
L°
0
N 40000
20000
0
0.0
i
1.0 2.0 3.0 4.0 5.0
Stage (feet)
KS = 21262
b = 1.1283
Storage vs. Stage
y = 21262x' 1213
R2=1
Page 1
Pond A
Calculation of Runoff Volume required for storage
The runoff to the pond for the 1" storm detention requirement is calculated using the SCS curve
number method. Impervious areas that directly enter the pond are counted as Directly Connected
Impervious Areas (DCIAs). No infiltration calculation will be provided for these areas. Areas
not directly connected will be accounted for in a composite curve number.
From SCS Soils Survey map, predominant hydrologic soil type = D
Using basic SCS runoff methodology, with no adjustments made
to initial abstractions (0.2'S and 0.8'S).
Impervious Area, directly connected (DCIA) = 12.32 acres
@CN= 98
Other areas draining to pond (not DCIA) = 3.08 acres
@ CN = 83
Runoff from DCIAs =_>
Precipitation amount = 1.0 inches
S = 0.204 inches (calculated)
Q• = 0.791 inches (calculated)
Runoff volume = 35371 CF
Runoff from non-connected areas =_>
Precipitation amount = 1.0 inches
S = 2.048 inches (calculated)
Q` = 0.132 inches (calculated)
Runoff volume = 1477 CF
Therefore, total runoff from precipitation in question = 36847 CF
This amount of runoff must be stored in the pond above normal pool elevation,
and be released in a period of two (2) to five (5) days, by an inverted PVC
siphon, the invert end of which is set at permanent pool elevation.
Page 2
Pond A
Calculation of depth required for runoff storage pool (above normal pool)
Normal pool depth (above invert) = 0.00 feet
Storage provided at permanent pool depth = 0 CF (calculated)
Total storage required for normal + storage pool = 36847 CF
Stage (above invert) associated with this storage = 1.63 feet
Therefore, depth required above normal pool for storm storage = 1.63 feet
19.54 inches
Therefore set crest of principal spillway at stage = 1.90 feet
and EL = 279.90 feet
At principal spillway crest, storm pool storage provided = 43865 CF
Page 3
Water Quality Pond Surface Area Requirements
Project Name: Renaissance Center
Job Number: MDL-99000
Designer: DAC
Date: 2/18/00
Pond Drainage Area Description ==>
Total DA = 15.40 acres
impervious Area = 12.32 acres
DA % impervious = 80.00%
SA / DA ratio calculations ==>
Pond Stage Storage Function: Ks = 5299.60
b = 1.4185
Ultimate Depth of pond = 6.00 feet
Average depth of pond = 4.23 feet
SA / DA ratios for drainage areas and depth (NCDEHNR, 1995):
4.00
Lower Limit =_> 70.00% 2.40%
Calc'd value =_> 80.00% 2.78%
Upper Limit =_> 80.00% 2.78%
Therefore, SA / DA required for this configuration =
Pond Surface Area Required ==>
4.23 5.00
2.07%
2.69% 2.38%
2.38%
2.69%
Pond SA Required = 18032 SF
Pond SA Provided = 21260 SF

Stage-Storage Function
Proiect: Renaissance Center MDL-99000
Pond A - Total to Normal Pool
Average Incremental Accumulated
Contour Contour Contour Contour
Contour Stage Area Area Volume Volume
feet feet SF SF CF CF
272.00 0.00 5730
274.00 2.00 8730 7230 14460 14460
276.00 4.00 12630 10680 21360 35820
278.00 6.00 21260 16945 33890 69710
Storage vs. Stage
80000
70000
60000
LL 50000
m 40000
30000
20000
I
10000
I
0
y = 5299.6x1 4185
Rz = 0.9962
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 j
Stage (feet) J
KS = 5299.6
b = 1.4186
Page 1

Stacie-Storage Function
Proiect: Renaissance Center MDL-99000
Average Incremental Accumulated
Contour Contour Contour Contour
Contour Stage Area Area Volume Volume
feet feet SF SF (CF (CF
272.00 0.00 370
274.00 2.00 1090 730 1460 1460
276.00 4.00 2010 1550 3100 4560
278.00 6.00 4190 3100 6200 10760
Pond A - Forebay to Normal Pool
T ,j 7- + "MAt - F<2A-= 101100 GF jj 7, C17 -r
inrat, 7F 1 txxo ..- Foci,- Wl iocF
12000
10000
LL 8000
U
rn 6000
0
U) 4000
2000
0
Storage vs. Stage
•
y = 407.42x''993
R2 = 0.9952
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00
Stage (feet)
KS = 407.42
b = 1.7993
Page 1
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Pond B
Small Watershed Method Hvdroaraoh Generation
(Rf.- "Elements of Urban Stormwater Design, H. R. Malcom, PE)
Drainage Area Description =_>
Total Drainage Area =
Impervious area = 25.92 AC @ c= 0.95 and CN = 98.0
Open / Grassy / Landscaped Area = 5.47 AC @ c= 0.63 and CN = 80.0
Wooded Area = 0.00 AC @ c= 0.00 and CN = 0.0
Other undescribed area = 1.01 AC @ c= 1.00 and CN = 100.0
Total DA = 32.40 AC c= 0.90 and CN = 95.0
Design Storm Description / Watershed Sensitivity =_>
Time of Concentration = 10.0 minutes
Tc methodology = Estimated, preliminary calculations
Enter known IDF factors to compute the intensity, or enter a known intensity in the area
marked "known intensity". If known, clear all IDF factors from the chart.
IDF Factors.
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
g 132 169 195 232 261 290
h 18 21 22 23 24 25
Calculated Intensities (do not enter known values here).
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
Intensity 4.71 5.45 6.09 7.03 7.68 8.29
(in/hr)
Known Intensities (enter known values here if not calculating above, else enter zero):
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
Intensity 0.00 0.00 0.00 0.00 0.00 0.00
(in/hr)
Pond B
Design storm flowrates ==>
Flowrates are calculated using the rational method, and incorporating frequency
coefficients for the 25, 50, and 100 year storms. These frequency coefficients are
1.1, 1.2, and 1.25 respectively.
Calculated design flowrates:
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
Flowrates 137.09 158.53 177.21 224.89 267.88 301.19
(CFS)
Formulate hydrograph using step-function estimated SCS dimensionless UH ==>
Ultimate Soil Storage:
S = 0.52 inches
Precipitation Depths for 6 hr. design storm:
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
P-depth 2.65 3.38 3.90 4.62 5.19 5.75
(inches)
SCS runoff depth using default initial loss characteristics (0.2S and 0.8S):
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
Q* 2.11 2.82 3.34 4.05 4.61 5.17
(inches)
Time to peak for design hydrograph (for step-function hydrograph):
2 year 5 year 10 year 25 year 50 year 100 year
storm storm storm storm storm storm
Tp 21.70 25.10 26.53 25.36 24.26 24.17
(minutes)
Resultant SWM design hydrographs ==>
2 year = 137.09 CFS @ 21.70 minutes
5 year = 158.53 CFS @ 25.10 minutes
10 year = 177.21 CFS @ 26.53 minutes
25 year = 224.89 CFS @ 25.36 minutes
50 year = 267.88 CFS @ 24.26 minutes
100 year = 301.19 CFS @ 24.17 minutes
Pond B
Water Quality Pond Design Sheet
Project Name: Renaissance Center
Designer: D.A. Clark
Job Number: MDL-99000
Date: 2/18/00

Contour
feet

Stage
feet
Contour
Area
SF Average
Contour
Area
SF Incremental
Contour
Volume
CF Accumulated
Contour
Volume
CF
283.0 0.0 44140
284.0 1.0 48700 46420 46420 46420
286.0 3.0 55450 52075 104150 150570
Storage vs. Stage
160000
140000
120000
v 100000
rn 80000
N 60000
40000
20000
0
y = 46420x' 071
R2=1
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Stage (feet)
Ks= 46420
b = 1.0711
Page 1

Pond B
Calculation of Runoff Volume required for storage
The runoff to the pond for the 1" storm detention requirement is calculated using the SCS curve
number method. Impervious areas that directly enter the pond are counted as Directly Connected
Impervious Areas (DCIAs). No infiltration calculation will be provided for these areas. Areas
not directly connected will be accounted for in a composite curve number.
From SCS Soils Survey map, predominant hydrologic soil type = D
Using basic SCS runoff methodology, with no adjustments made
to initial abstractions (0.2"S and 0.8`S).
Impervious Area, directly connected (DCIA) = 25.92 acres
@CN= 98
Other areas draining to pond (not DCIA) = 6.48 acres
@ CN = 83
Runoff from DCIAs =_>
Precipitation amount = 1.0 inches
S = 0.204 inches (calculated)
Q. = 0.791 inches (calculated)
Runoff volume = 74416 CF
Runoff from non-connected areas =_>
Precipitation amount = 1.0 inches
S = 2.048 inches (calculated)
Q• = 0.132 inches (calculated)
Runoff volume = 3107 CF
Therefore, total runoff from precipitation in question = 77623 CF
This amount of runoff must be stored in the pond above normal pool elevation,
and be released in a period of two (2) to five (5) days, by an inverted PVC
siphon, the invert end of which is set at permanent pool elevation.
Page 2
Pond B
Calculation of depth required for runoff storage pool (above normal pool)
Normal pool depth (above invert) = 0.00 feet
Storage provided at permanent pool depth = 0 CF (calculated)
Total storage required for normal + storage pool = 77523 CF
Stage (above invert) associated with this storage = 1.61 feet
Therefore, depth required above normal pool for storm storage = 1.61 feet
19.37 inches
Therefore set crest of principal spillway at stage = 1.90 feet
and EL = 284.90 feet
At principal spillway crest, storm pool storage provided = 92316 CF
Page 3
Water Quality Pond Surface Area Requirements
Project Name: Renaissance Center
Job Number: MDL-99000
Designer: DAC
Date: 2/18/00
Pond Drainage Area Description ==>
Total DA = 32.40 acres
Impervious Area = 25.92 acres
DA % impervious = 80.00%
SA / DA ratio calculations ==>
Pond Stage Storage Function: Ks = 19141.00
b = 1.2693
Ultimate Depth of pond = 5.00 feet
Average depth of pond = 3.94 feet
SA / DA ratios for drainage areas and depth (NCDEHNR, 1995):
3.00 3.94 4.00
Lower Limit =_> 70.00% 2.88% 2.40%
Calc'd value =_> 80.00% 3.36% 2.82% 2.78%
Upper Limit =_> 80.00% 3.36% 2.78%
Therefore, SA / DA required for this configuration = 2.82%
Pond Surface Area Required ==>
Pond SA Required = 39733 SF
Pond SA Provided = 44140 SF
Pond B - Total to Normal Pool
Stage-Storage Function
Pro ect: Renaissance Center MDL-99000
Average Incremental Accumulated
Contour Contour Contour Contour
Contour Stage Area Area Volume Volume
feet feet SF (SF) CF CF
278.00 0.00 20030
280.00 2.00 26310 23170 46340 46340
282.00 4.00 36610 31460 62920 109260
283.00 5.00 44140 40375 40375 149635
i
160000
140000
120000
v 100000
rn 80000
° 60000
40000
j 20000
0
Storage vs. Stage
y = 19141 X1 2113
R2 = 0.9993
0.00 1.00 2.00 3.00 4.00 5.00 6.00
Stage (feet)
Ks= 19141
b = 1.2693
Page 1

Stage-Storage Function
Project: Renaissance Center MDL-99000
Pond B - Forebay to Normal Pool
Average Incremental Accumulated
Contour Contour Contour Contour
Contour Stage Area Area Volume Volume
feet feet SF SF CF CF
278.00 0.00 5130
280.00 2.00 7710 6420 12840 12840
282.00 4.00 12280 9995 19990 32830
283.00 5.00 15820 14050 14050 46880
moo:*I 7, Oa mAu p = dvf. .?
lo OcrjqAi, Pte.- - I d? ?03?
r-
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Storage vs. Stage
50000
45000
40000
35000
U 30000
rn 25000
o 20000
15000
10000
5000
0
y = 4838.2x 1 3113
R2 = 0.9989
0.00 1.00 2.00 3.00 4.00 5.00 6.00
Stage (feet)
i
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b = 1.3993
Page 1

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