20120095 Ver 1_SMP Approval_20121009

) Q - 2Dq)
Date: October 4, 2012
To: Sue Homewood
NC Division of Water Quality
Winston -Salem Regional
Office
585 Waughtown Street
Winston - Salem, NC 27107
RKEIVED —
Po,e, D(OM of EENR
Y'
WnstonSalem
Regional Office
PLLC
From: Victoria Waldron Small, PE
Westcott, Small & Associates, PLLC
125 S. Elm Street, Suite 606
Greensboro, NC 27401
We are sending you ® attached ❑ under separate cover the following items:
Shop Drawings ❑ Estimate
Prints, n Rni -Afir.'
Contracts
❑ Copy of Letter
Disk
# COPIES
DRAWING NO
DESCRIPTION
DISPOSITION
2
Guilford County Schools
For Your Use
Autism Classroom Building
Approved Stormwater Plans
REMARKS:
cc: File
�@azkfl _@�
E44 2012
DE NR . WA d'
'Ends
125 S. Elm Street, Suite 606 • Greensboro, North Carolina 27401 • phone. [phone] • web: www.wsaaeng.com

* * * ** LANDSCAPE APPROVAL AND INSPECTION * * * **
® A LANDSCAPE PLAN (which depicts the plant types cnd locations) Must Be
Submitted To The Planning Department For Review A -id Approval On or Before
(90 Days).
® THE Required LANDSCAPE PLANT MATERIAL Must Be installed And Inspected
Prior To Receiving A Certificate of Occupancy.
To request an inspection contact Landscape /Watershed Planner at 336- 373 -2918
* * * ** TREE PRESERVATION APPROVAL AND INSPECTION * * * **
® The Required TREE PROTECTION FENCING Must Be Installed and Inspected
Prior to Land Disturbance.
To request a pre- construction meeting contact the Urban Forester at 336 - 373 -2150
❑ THE Required REFORESTATION AREA Must Be Installed And Inspected Prior To
Receiving A Certificate of Occupancy.
* * * ** ZONING APPROVAL AND INSPECTION * * * **
® The Required Parking Spaces And Drive Aisles Must Be PAVED And
STRIPED Prior To Receiving a Certificate of Occupanc, /.
❑ Tank Permit required*
(Contact Zoning Office Office at 336 - 373 -2630)
® Sign Permit required*
(Contact Zoning Office at 336- 373 - 2630).
* * * ** WATERSHED APPROVAL AND INSPEC .ION * * * **
® A FINAL PLAT Must Be Recorded In The Guilford County Register Of Deeds
Prior To Receiving A Certificate of Occupancy.
® Construction of the WATER QUALITY DEVICE (bioreten ~ion) Must Be Complete
and the "En ineer's Certification of Completion" Sent To The Planning
Department Prior To Receiving A Certificate of Occuponcy.
* * * ** FLOODPLAIN APPROVAL
❑ Elevation Certification Required
❑ A Floodpalin Development Permit is required for ANY disturbance within
the floodplain /SFHA area. Contact Stormwater for c Floodplain
Development Permit Application.
* * * ** SOIL EROSION CONTROL
(Contact Erosion Control Officer at 336-373-21,58)
❑ Watershed Pond Construction /Surety Or Improvement Guarantee Must
Be Submitted.
* * * ** ENGINEERING CONSTRUCTION APPRO !AL * * * **
(Contact Engineering Division at 336 - 373 -2302)
• Utility Construction Plan Approval Required*
• Pavement Cut Permit May Be Required*
• Roadway Construction Plans Required*
• Storm Sewer System.
• Permit Required To Tie Into Storm Sewer Systen -;
• Driveway Culvert Inspection Required.
* * * ** WATER RESOURCES CONSTRUCTION APPROVAL * * * **
(Contact Resources at 336 - 373 -2055)
* * * *:*TO BE FILLED OUT BY DESIGNER * * * **
* * * ** PROJECT SUMMARY * * *•*
Minimum Number Of Required Parking Spaces,:: 355
Total Number Of Provided Parking Spacers: 357
KA2
B8 PG 91 �ED� 4, PG 1176
Plat book and /or Deed book Reference: BK 1 tii$. PG 117 , G 2117
Street Classification(s):OFFERRELL ROAD (MINOR THOROUGHFARE),
Developer's Name: GUILFORD COUNTY BOARD OF EDUCATION
Address: 712 N. EUGENE ST, GREENSBORO, N � 27401
Daytime Phone Number:
Existing Land Use: SCHOOL SIC #: 8211
Stormwater Managemert /Watershed
Stormwater Control /Improvements(s) 3 BIORE 7ENTION CELLS
Maximum Amount of BUA Allowed Per Stormwater Control
Design: 3.36 AC (4.14 %)
Distance to Nearest Floodway: 4900'
On -site soil types(s): EnB, EnC, HhB, WkD, Cc:B
Hydrology groups(s): B
BIOCELL #1: 0.17 AC BIOCELL #2: 2.30 AC
Amount of site to be disturbed: BIOCELL ¢#3: 0.88 AC
* * * ** FINANCIAL RESPONSIBILITY A. �KNOWLEDGEMENT * * * **
GUILFORD COUNTY BOARD OF EDUCATION is to provide a one year
warranty to guarantee the public improvement from failure due to faulty
workmanship or materials. Once the project is complete, this individual or
corporation will be required to sign a notarized agreement, upon completion
and return of this agreement, they will receive a final acceptance letter and
the year warranty will begin. The City of Gireensboro will not release bonds
or accept public Infrastructure for maintenance without a final inspection.
Financial Responsibility Individual or Corporation
ADDRESS: 712 N. EUGENE ST.
GREENSBORO, NC 27401
TELEPHONE:
CITY OF GREENSBORO
WATER RESOURCES DEPARTMENT
COLLECTION SYSTEM EXTENSION PERMIT APPROVAL
Signature
PROJECT ORIGIN: ❑ CITY ® PRIVATE
TYPE OF PROJECT: ❑ CITY OWNED ® PRIVATELY OWNED
❑ PORTIONS PUBLIC A��D PRIVATELY OWNED
PER ARTICLE 21 OF CHAPTER 143 OF THE NORTH CAROLINA GENERAL
STATUTES, AS AMENDED, AND OTHER LAWS, IRULES AND REGULATIONS,
PERMISSION IS HEREBY GRANTED BY THE CITY OF GREENSBORO, A
DELEGATED PERMITTING AUTHORITY APPROVED, BY THE NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION, FOR THE CONSTRUCTION AND
OPERATION OF THE COLLECTION SYSTEM DEP`TED ON THESE PLANS AND
THROUGHOUT THE PERMITTING PROCESS.
CITY OF GREENSBORO AND ITS STAFF ARE NOT RESPONSIBLE FOR ERRORS
IN DESIGNS, CALCULATIONS, DRAWINGS OR STATEMENTS, OR FINDING AND
CORRECTING ANY ERRORS OR DEFICIENCIES SJBMITTED BY APPLICANTS
OR THEIR CONSULTANTS, AND DISCLAIMS ANY LIABILITY FOR ERRORS, IN
ACCORDANCE WITH NORTH CAROLINA GENERA!. STATUTE 13OA -26.2. ANY
PERSON WHO KNOWINGLY MAKES ANY FALSE _STATEMENT,
REPRESENTATION, OR CERTIFICATION IN ANY APPLICATION OR DESIGN
DOCUMENTS SHALL BE GUILTY OF A CLASS 2 MISDEMEANOR, WHICH MAY
INCLUDED A FINE NOT TO EXCEED $10,000 PER VIOLATION.
PERMITTEE SHALL BE RESPONSIBLE FOR ADHERANCE TO ALL CONDITIONS
OF THE CITY OF GREENSBORO WATER RESOUPCES DEPARTMENT AS
CHECKED.
❑ WASTEWATER COLLECTION SYSTEM EXTENSION MASTER PERMIT
(PUBLIC)
❑ INDIVIDUAL WASTEWATER COLLECTION SYSTEM EXTENSION
PERMIT (PRIVATE)
ANY SIGNIFICANT CHANGES (SIZE, TYPE, CONI' ±IECTIONS, LENGTH,
ALIGNMENT, ETC.) TO THAT APPROVED ON THESE PLANS OR PERMITTING
DOCUMENTS SHALL BE REVIEWED AND APPRO`/ED BY THE CITY OF
GREENSBORO PRIOR TO CONSTRUCTION.
APPROVED BY: CITY OF GREENSBORO
COG PERMIT NO. WRCS00 APPROVAL DATE:
COVER SHEET APPLICATION FORM (Revised July 18, 2007)
Water System*
Mailing Address P.O. Box 3136, Greensboro, NC 27402 -3136
Office Address: 300 West Washington Street, Greensboro, NC 27402
If you have any questions about the process call Nicole Word with the Planning Department at 336 - 412 -5757
PLAN TYPE:
®
State Water Permit
Required.
Multifamily Developments
$400 plus $25 per dwelling unit
❑
Outside City - Utility
Agreement And
Annexation F =tition Required.
Submit 14 copies of plans to the Planning Department for review.
Sanitary
Sewer System*
PROJECT SUMMARY.•
Owner/Appl icont: GUILFORD COUNTY BOARD OF EDUCATION
Report Comments to: TORT SMALL
•
State Sanitary Sewer System Permit
Required.
Report Comments to:
•
Outside City - Utility
Agreement And
Annexation Petition Required.
Total Tract Acreage: 81.17 AC
Zoning District: PI
*Fee required
before construction
plans are released.
* * * *:*TO BE FILLED OUT BY DESIGNER * * * **
* * * ** PROJECT SUMMARY * * *•*
Minimum Number Of Required Parking Spaces,:: 355
Total Number Of Provided Parking Spacers: 357
KA2
B8 PG 91 �ED� 4, PG 1176
Plat book and /or Deed book Reference: BK 1 tii$. PG 117 , G 2117
Street Classification(s):OFFERRELL ROAD (MINOR THOROUGHFARE),
Developer's Name: GUILFORD COUNTY BOARD OF EDUCATION
Address: 712 N. EUGENE ST, GREENSBORO, N � 27401
Daytime Phone Number:
Existing Land Use: SCHOOL SIC #: 8211
Stormwater Managemert /Watershed
Stormwater Control /Improvements(s) 3 BIORE 7ENTION CELLS
Maximum Amount of BUA Allowed Per Stormwater Control
Design: 3.36 AC (4.14 %)
Distance to Nearest Floodway: 4900'
On -site soil types(s): EnB, EnC, HhB, WkD, Cc:B
Hydrology groups(s): B
BIOCELL #1: 0.17 AC BIOCELL #2: 2.30 AC
Amount of site to be disturbed: BIOCELL ¢#3: 0.88 AC
* * * ** FINANCIAL RESPONSIBILITY A. �KNOWLEDGEMENT * * * **
GUILFORD COUNTY BOARD OF EDUCATION is to provide a one year
warranty to guarantee the public improvement from failure due to faulty
workmanship or materials. Once the project is complete, this individual or
corporation will be required to sign a notarized agreement, upon completion
and return of this agreement, they will receive a final acceptance letter and
the year warranty will begin. The City of Gireensboro will not release bonds
or accept public Infrastructure for maintenance without a final inspection.
Financial Responsibility Individual or Corporation
ADDRESS: 712 N. EUGENE ST.
GREENSBORO, NC 27401
TELEPHONE:
CITY OF GREENSBORO
WATER RESOURCES DEPARTMENT
COLLECTION SYSTEM EXTENSION PERMIT APPROVAL
Signature
PROJECT ORIGIN: ❑ CITY ® PRIVATE
TYPE OF PROJECT: ❑ CITY OWNED ® PRIVATELY OWNED
❑ PORTIONS PUBLIC A��D PRIVATELY OWNED
PER ARTICLE 21 OF CHAPTER 143 OF THE NORTH CAROLINA GENERAL
STATUTES, AS AMENDED, AND OTHER LAWS, IRULES AND REGULATIONS,
PERMISSION IS HEREBY GRANTED BY THE CITY OF GREENSBORO, A
DELEGATED PERMITTING AUTHORITY APPROVED, BY THE NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION, FOR THE CONSTRUCTION AND
OPERATION OF THE COLLECTION SYSTEM DEP`TED ON THESE PLANS AND
THROUGHOUT THE PERMITTING PROCESS.
CITY OF GREENSBORO AND ITS STAFF ARE NOT RESPONSIBLE FOR ERRORS
IN DESIGNS, CALCULATIONS, DRAWINGS OR STATEMENTS, OR FINDING AND
CORRECTING ANY ERRORS OR DEFICIENCIES SJBMITTED BY APPLICANTS
OR THEIR CONSULTANTS, AND DISCLAIMS ANY LIABILITY FOR ERRORS, IN
ACCORDANCE WITH NORTH CAROLINA GENERA!. STATUTE 13OA -26.2. ANY
PERSON WHO KNOWINGLY MAKES ANY FALSE _STATEMENT,
REPRESENTATION, OR CERTIFICATION IN ANY APPLICATION OR DESIGN
DOCUMENTS SHALL BE GUILTY OF A CLASS 2 MISDEMEANOR, WHICH MAY
INCLUDED A FINE NOT TO EXCEED $10,000 PER VIOLATION.
PERMITTEE SHALL BE RESPONSIBLE FOR ADHERANCE TO ALL CONDITIONS
OF THE CITY OF GREENSBORO WATER RESOUPCES DEPARTMENT AS
CHECKED.
❑ WASTEWATER COLLECTION SYSTEM EXTENSION MASTER PERMIT
(PUBLIC)
❑ INDIVIDUAL WASTEWATER COLLECTION SYSTEM EXTENSION
PERMIT (PRIVATE)
ANY SIGNIFICANT CHANGES (SIZE, TYPE, CONI' ±IECTIONS, LENGTH,
ALIGNMENT, ETC.) TO THAT APPROVED ON THESE PLANS OR PERMITTING
DOCUMENTS SHALL BE REVIEWED AND APPRO`/ED BY THE CITY OF
GREENSBORO PRIOR TO CONSTRUCTION.
APPROVED BY: CITY OF GREENSBORO
COG PERMIT NO. WRCS00 APPROVAL DATE:
COVER SHEET APPLICATION FORM (Revised July 18, 2007)
Greensboro City Planning Department
Mailing Address P.O. Box 3136, Greensboro, NC 27402 -3136
Office Address: 300 West Washington Street, Greensboro, NC 27402
If you have any questions about the process call Nicole Word with the Planning Department at 336 - 412 -5757
PLAN TYPE:
REVIEW FEE:
Site Plans
$400 plus $20 per 1,000 sq. ft. gross floor area
Multifamily Developments
$400 plus $25 per dwelling unit
Single Family Subdivisions
$260 plus $40 per lot
Minor Revisions
$260 plus the per lot, square footage, or dwelling unit listed below applied to any
increase.
Submit 14 copies of plans to the Planning Department for review.
Plan review takes 7 -10 working days; the Planning Department staff will contact you when your plan is ready.
0.17 AC
PROJECT SUMMARY.•
Owner/Appl icont: GUILFORD COUNTY BOARD OF EDUCATION
Report Comments to: TORT SMALL
Telephone Number: [phone] Fox Number:
100%
E -Mail: tsmallOwsooen .com
Report Comments to:
Telephone Number: Fox Number:
I
o
E -Mail:
Tax Mo Block Parcel s - - -
Total Tract Acreage: 81.17 AC
Zoning District: PI
Watershed Designation:
Proposed Use: EDUCATIONAL
Number of Lots: 1
.Multifamily Developments: # of Units N/A
Type: N A Apartments N/A Townhomes N/A Condominiums N A
Non - Residential Developers: Existing GFA 224,444 Pro osed GFA 51,400
Amout of Existing BUA: 15.74 AC(19.399)
Amount of Proposed BUA: Existing BUA: 15.74 AC 19.399 - Amount of BUA d moed: 0.12 AC( 0.159 +
Pro osed BUA: 2.26 AC .789 =Total BUA: 17.88 AC 22.039
PROJECT SUBMISSION GUIDELINES
Plans submitted to the Planning Department that do not include the items on the Design Review Application Form will
not be rewiewed, and will be returned to the contact person.
This portion of the cover steet must be filled out and signed by the person designating the site to show that he /she
has read and provided the required information to submit a plan to the Planning Department.
I have read, understood and completed the attached plan to the best of my knowledge and ability.
Name: TORT SMALL Phone: 336.310.WSAA Date: 4/13 12
Date Map Revised:
Revisions By
* * * ** TRANSPORTATION APPROVAL * * * **
(Contact GDOT at 336 - 373 -GDOT)
Driveway Permit:
® City of Greensboro Driveway Permit Required
❑ N.C. Department Of Transportation Driveway Permit Required.
Driveway Permit Issued? YES N/A
NO, DO NOT ISSUE BUILDING PERMIT
* * * ** SUBDIVISION APPROVAL * * * **
❑ A FINAL PLAT Must Be Recorded In The Guilford County Register
Of Deeds Prior To Issuance Of A Building Permit.
Final Plat Recorded? YES
NO, DO NOT ISSUE PERMIT.
N/A
OLD BURUNG` R0.
E. BESSEMER AVE.
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LX
S R 3001
VICINITY MAP (NTS)
The items checked below have not been included on this plan being submitted for
Technical Review Committee review and approval. It is understood that additional
reviews in the development process (including construction and utility plan review,
as indicated below) could affect the amount of development possible on this site
and the costs associated with this development:
❑ Sidewalk, Road Widening and Turn. Lanes
Required sidewalk along existing streets, required road widening, and /or required
turn lanes have not been depicted and their design has not been reviewed.
I understand that the review and approval of said improvements will occur during
the construction and utility plan process.
❑ Water and Sanitary Sewer
Full design information for the proposed water and sanitary sewer system
has not been depicted and their design has not been reviewed. I understand
that the review and approval of said improvements will occur during the
construction and utility plan review process.
❑ BMP
Full design information for the proposed water quality /quantity device (BMP)
has not been depicted and its design has not been reviewed. I understand
that the review and approval of said improvements will occur during the
construction and utility plan review process.
❑ STORM SEWER
Full design information for the storm sewer system and /or grading has not
been depicted and its design has not been reviewed. I understand that the
review and approval of said improvements will occur during the construction
and utility plan review process.
TOR! SMALL
Individual Responsible for Preparation of the Plan Signature / Seal
• SEAL '
C3 : 024442
:may ti.Fl,wQ�
P -0576
Watershed Plan Approved By The Technical Review
Committee (TRC) on
and /or Site Plan Subdivision, Group Development,
Approved by _: d, on
X 11 ( 2010- 442 -
TRACKING NUMBER
NOTE: TRC approval represents the
maximum possible development of the site.
Additional reviews in the development
process (including Construction Plan review)
could reduce the amount of development
possible on this site.
NOTE: Conformance With This Approved
Plan Is Your Resposibilit y; And Any
Change In Land Use, Lot Lines, Building
Location, Parking, Drives, Utility Lines,
Landscaping, etc. Must Be Resubmitted To
The Planning Department To Ei ®
Delay in the Review Frocess. 0,2
Winston Salem
Regional Office
(CLERK OF THE TRC) (DATE)
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DRAINAGE AREA
BUILT UPON AREA
MAX BUA
ALLOWED
BMP
ONSITE
OFFSITE
TOTAL
ONSITE
OFFSITE
TOTAL
BIOCELL 1
0.38 AC
0.00 AC
0.38 AC
0.17 AC
0.00 AC
0.17 AC
0.17 AC
V N
100%
0.00%
100%
100%
0.00%
100%
I
o
BIOCELL 2
4.24 AC
0.00 AC
4.24 AC
2.30 AC
0.00 AC
2.30 AC
2,30 AC
�-
100%
0.00%
100%
100%
0.00%
100%
a
BIOCELL 3
1.56 AC
0.00 AC
1.56 AC
0.88 AC
0.00 AC
0.88 AC
0.88 AC
-0
100%
0.00%
100%
100%
0.00%
100%
* * * ** TRANSPORTATION APPROVAL * * * **
(Contact GDOT at 336 - 373 -GDOT)
Driveway Permit:
® City of Greensboro Driveway Permit Required
❑ N.C. Department Of Transportation Driveway Permit Required.
Driveway Permit Issued? YES N/A
NO, DO NOT ISSUE BUILDING PERMIT
* * * ** SUBDIVISION APPROVAL * * * **
❑ A FINAL PLAT Must Be Recorded In The Guilford County Register
Of Deeds Prior To Issuance Of A Building Permit.
Final Plat Recorded? YES
NO, DO NOT ISSUE PERMIT.
N/A
OLD BURUNG` R0.
E. BESSEMER AVE.
HqC 0
0 R �'
D
cr.
LX
S R 3001
VICINITY MAP (NTS)
The items checked below have not been included on this plan being submitted for
Technical Review Committee review and approval. It is understood that additional
reviews in the development process (including construction and utility plan review,
as indicated below) could affect the amount of development possible on this site
and the costs associated with this development:
❑ Sidewalk, Road Widening and Turn. Lanes
Required sidewalk along existing streets, required road widening, and /or required
turn lanes have not been depicted and their design has not been reviewed.
I understand that the review and approval of said improvements will occur during
the construction and utility plan process.
❑ Water and Sanitary Sewer
Full design information for the proposed water and sanitary sewer system
has not been depicted and their design has not been reviewed. I understand
that the review and approval of said improvements will occur during the
construction and utility plan review process.
❑ BMP
Full design information for the proposed water quality /quantity device (BMP)
has not been depicted and its design has not been reviewed. I understand
that the review and approval of said improvements will occur during the
construction and utility plan review process.
❑ STORM SEWER
Full design information for the storm sewer system and /or grading has not
been depicted and its design has not been reviewed. I understand that the
review and approval of said improvements will occur during the construction
and utility plan review process.
TOR! SMALL
Individual Responsible for Preparation of the Plan Signature / Seal
• SEAL '
C3 : 024442
:may ti.Fl,wQ�
P -0576
Watershed Plan Approved By The Technical Review
Committee (TRC) on
and /or Site Plan Subdivision, Group Development,
Approved by _: d, on
X 11 ( 2010- 442 -
TRACKING NUMBER
NOTE: TRC approval represents the
maximum possible development of the site.
Additional reviews in the development
process (including Construction Plan review)
could reduce the amount of development
possible on this site.
NOTE: Conformance With This Approved
Plan Is Your Resposibilit y; And Any
Change In Land Use, Lot Lines, Building
Location, Parking, Drives, Utility Lines,
Landscaping, etc. Must Be Resubmitted To
The Planning Department To Ei ®
Delay in the Review Frocess. 0,2
Winston Salem
Regional Office
(CLERK OF THE TRC) (DATE)
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\1 41,
PROP. 10' LEVEL SPREADER
l SEE DETAIL THIS SkET
ELEV.: 766.00 l
INV. OUT. 766.6
1
NSTRUCTION SEQUENCE FOR BIO_- RETENTION
r
\ 1
i
\� ® 6" PVd LEAN OUT
PROP V.: 766.60 1
5 SET'
' � n
/ P:- --1 �-
ROP. YAR� INLET OVERFLOW
COG STD. 740 424
THROAT ELEV: 771.35
INV. IN: 766.40
INV. OUT 766.20 /
/ r
i � r
B10- CELL #1 PLAN
in = 10,
1** ALL BIO -CELL PIPES ARE AT 0.57 SLOPE MIN.
1. ONCE THE UPSTREAM SITE IS STABLIZED, REMOVE EXISTING
EROSION CONTROL MEASURES.
2. RE- EXCAVATE AREA FOR BIO -CELL.
3. INSTALL GEOTEXTILE FABRIC IN THE BIO -CELL AREA.
4. INSTALL PVC PERFORATED UNDERDRAIN.
5. INSTALL WASHED #57 STONE, WASHED SAND, GEOTEXTILE FABRIC
AND PLANTING SOIL MIXTURE.
6. CONSTRUCT FOREBAY PER DETAIL.
7. CONSTRUCT LEVEL SPREADER AND FILTER STRIP.
8. PLANT GRASS /SOD.
9. RESEED/ STABILIZE DISTURBED AREAS IMMEDIATELY AFTER
FINISHED GRADES HAVE BEEN ACHIEVED. TEMPORARY
VEGETATIVE COVER SHALL BE PROVIDED OVER DISTURBED AREAS
WHICH MAY NOT BE AT FINAL GRADE BUT WHICH WILL BE LEFT
UNDISTURBED FOR AT LEAST 15 DAYS.
QUANTITY CONTROL CERTIFICATION
THE STORMWATER CONTROL STRUCTURE(S) SHOWN ON THIS PLAN IS
DESIGNED TO REDUCE THE POST - DEVELOPMENT 1 -YEAR 24 HOUR
STORM EVENT TO PRE - DEVELOPMENT RATES.
ENGINEER'S CERTIFICATION OF STORMWATER QUALITY CONTROL
I CERTIFY THAT, PURSUANT TO GENERALLY ACCEPTED ENGINEERING
STANDARDS IN THE COMMUNITY, IT IS MY PROFESSIONAL OPINION THAT
RUNOFF FROM THE FIRST INCH OF RAIN FROM AREAS THAT ARE
REQUIRED TO BE CONTROLLED PER SECTION 30 -7 -1.12 OF THE
GREENSBORO DEVELOPMENT ORDINANCE IS CONTROLLED BY A
PERMANENT ENGINEERED STORMWATER QUALITY CONTOL THAT HAS BEEN
DESIGNED TO MEET OR EXCEED THE REQUIREMENTS IN THE GREENSBORO
STORMWATER MANAGMENT MANUAL
P.E. SEAL
SIGNATURE
DATE
NOTE: THE ENGINEER'S CERTIFICATION OF COMPLETION WILL BE
REQUIRED PRIOR TO THE FINAL PLAT OR CERTIFICATE OF OCCUPANCY.
THE STORMWATER CONTROL IS TO BE INSPECTED TO ENSURE IT IS
FUNCTIONING AS DESIGNED AND HAS FULL DESIGN VOLUME PRIOR TO
ISSUANCE OF ANY CERTIFICATE OF OCCUPANCY.
NOTE: THE PROPERTY OWNER IS RESPONSIBLE FOR MAINTAINING THE
STORMWATER CONTROL(S) ACCORDING TO THE APPROVED MAINTENANCE
PLAN AND DIRECTIONOF THE CITY OF GREENSBORO.
NOTE: THE CITY OF GREENSBORO AND THEIR ASSIGNS HAVE THE,
RIGHT TO ACCESS THE STORMWATER CONTROL(S) FOR INSPECTIONS OR
MAINTENANCE, AS NECESSARY
INFLOW CALCULATION
QIOA4 =CIA
Qvm-- (0.9)(0.21)(0.38)
Q,./m= 0.07 CFS
BIORETENTION AREA NOTES:
-• r r
SHWT BELOW 755.00
TOP OF PONDING
ELEV. - 771.35
PROP. YARD INLET OVERFLOW
COG STD. NO 424
THROAT ELEV: 771.35
INV. IN: 766.40
INV. OUT: 766.20
1 YEAR /24 HOUR STORM: 771.35
2 YEAR /24 HOUR STORM: 771.38
10 YEAR /24 HOUR STORM: 771.40
100 YEAR /24 HOUR STORM: 771.43
TOP SOD GRASS AND
BOTTOM PONDING ELEVATION
BID AREA = 770.60
BOTTOM OF SOD
GRASS ELEV: 770.43
1:11
FILTER MEAN r r
y •- . . r
r
BIORETENTION AREA CROSS SECTION
NTS
_...,, .ar.Too RD.
VICINITY MAP - 1 " =2000'
SITE INFORMATION
EX. ZONING PI
PROP. ZONING PI
CURRENT LANDUSE SCHOOL
PROP. LANDUSE SCHOOL
TAX MAP NUMBER 00 -03- 0146 -0- 0499 -00 -003
PLAT REFERENCE 138 -117 28 -91
DEED REFERENCE 4941 -1176 4984 -2117
TOTAL AREA 81.17 ac.
WATERSHED -
AVERAGE SLOPE 5.2%
SEaaENT DEPTH STAKE. DISTANCE TO
MARK STAKE AT DEPTH OF NEAREST FEMA 4900'
PIPE 1'0� FoR BOUT FLOOD PLAIN
�1 2' DEEP �(� SOILS EnB, EnC, HhB, wko, cue
1. PLANTING SOIL SHALL BE HOMOGENIOUS SOIL ,MIXTURE FREE OF STONES, STUMPS,
ROOTS, OR OTHER SIMILAR MATERIAL GREATER ,, AN 2" AND SHALL BE 85 % -88% SAND,
3 % -5% ORGANIC, AND 8 % -12% FINES (BY VOLUME).
2. BIO RETENTION AREA UNDER DRAIN SHALL BE SCHEDULE 40 PVC AND SHALL BE
UNDERLAIN WITH GEOTEXTILE FABRIC. THE BOTTOM OF THE SLOPE SHALL HAVE A
POSITIVE SLOPE TOWARD THE PIPE. LONGITUDINAL DRAIN SLOPES SHALL HAVE AN
APPROXIMATE GRADE OF 0.5 %.
3. PHOSPHORUS INDEX OF THE SOIL MIX SHALL BE BETWEEN 10 AND 30.
4. PERMEABILITY SHALL BE BETWEEN 1 INCH PEIR; HOUR AND 6.0 INCH PER HOUR. 1 -2
INCHES PER HOUR IS PREFERRED.
5. UNDERDRAIN PIPES SHALL HAVE A MINIMUM G!F 4 ROWS OF PERFORATIONS AROUND
THE DIAMETER OF THE PIPE (MORE FOR PIPES 10 INCHES IN DIAMETER AND LARGER),
AND THE PERFORATIONS SHALL BE PLACED 6 INt CCHES ON CENTER WITHIN EACH ROW FOR
THE ENTIRE LENGTH OF THE DRAINAGE LATERAL, PERFORATIONS SHALL BE 3/8" IN
DIAMETER.
6. PLANTING SOIL MIX SHALL BE TESTED BY AN APPROVED LAB PRIOR TO PLACEMENT.
7. CONTRACTOR SHALL PROVIDE WATER AS NECESSARY TO ENSURE VEGETATION IS
PROPERLY ESTABLISHED.
8. CONTRACTOR SHALL CERTIFY TO THE ENGINEER THAT THE INSTALLED SYSTEM MEETS
ALL DESIGN SPECIFICATION UPON INITIAL OPERA1ON ONCE THE PROJECT IS COMPLETE.
9. CONTRACTOR TO PROVIDE STORMWATER SER`ACES AND THE ENGINEER WITH A SOIL
MEDIA PERMEABILITY TEST REPORT ONCE THE PLANTING SOIL IS IN PLACE.
10. WHEN USING SOD, AVOID SOD THAT IS GRC`O'VN IN SOIL THAT HAS AN IMPERMEABLE
LAYER (SUCH AS CLAY).
CLASS II RIP -RAP
3' THICK
FOREBAY DETAIL (N.T.S.)
2.5' DEEP
CLASS -1 RIPRAP
-FILTER FABRIC
3" #57 STONE
,
THE PROPOSED IMPROVEMENTS (10.11AC) REPRESENT LESS
THAN 10% OF THE DRAINAGE AREA AT THE SITE OUTLET
(109.41 AC) THEREFORE NO QUANTITY CONTROL IS
REQUIRED.
IF STORMWATER INUNDATES THE BIO -CELL FOR MORE THAN
72 HOURS AFTER A STORM EVENT THE BIO -CELL IS NOT
FUNCTIONING AS INTENDED AND A PROFESSIONAL ENGINEER
SHALL BE CONSULTED FOR REMEDIAL PLANS. PLANS SHALL
BE FORWARDED TO THE GOVERNMENTAL OFFICE HAVING
JURISDICTION FOR WATERSHED PROTECTION FOR APPROVAL.
MAINTENANCE REQUIREMENTS FOR BIORETENTION AREAS
DESCRIPTION
METHOD
FREQUENCY
TIME OF YEAR
SOIL
INSPECT AND
REPAIR EROSION
VISUAL
LY
MONTHLY
PLANTS
REMOVE AND REPLACEMENT
SEE
EX. BUA
3/15 TO 4/30
OF ALL DEAD AND DISEASED
PLANTING
PROP. BUA
AND
VEGETATION CONSIDERED
SPECIFI-
TOTAL BUA
10/1 TO 11/30
BEYOND TREATMENT
22.03%
EX. PERVIOUS
SIGN
WATER OF PLANT MATERIAL
80.61%
PROP. PERVIOUS
SHALL TAKE PLACE AT END
-2.64%
IMMEDIATELY
OF EACH DAY FOR 14
BY HAND
AFTER
N/A
CONSECUTIVE DAYS AND
FOR PROP. SCHOOL 1 SPACE /300 SF OF ADMIN & 3
COMPLETION OF
CLASSROO SSPACES/CLASS.
20 SPACES. 282+13+60-355
AFTER PLANTING HAS BEEN
INFORMATION
PROJECT
TYPE LOCATION
COMPLETED
SANITARY SEWER
8"
INSPECT PLANTS TO ENSURE
VISUAL/BY
AFTER PERIODS
DI ON SITE
THEY REMAIN HEALTHY,
REPLACE AS NEEDED WITH
HAND
OF PROLONGED
WHENEVER NEEDED
SIMILAR PLANTS.
to
INUNDATION
GRAPHIC SCALE
10 0 5 10 20 Immomml
6m mmi
A'
z 2
N F U
a
w�aN O w
o S
STORM SEWER I VARIES VARIES ON SITE
ELECTRIC UNDERGROUND ON SITE
GAS UNDERGROUND ON SITE
OWNER INFORMATION
OWNER /DEVELOPER
GUILFORD COUNTY EOARD OF
EDUCATION
712 N. EUGENE ST
GREENSBORO, NC 27401
LEGEND
ls(
NAL SET/FOUND
ACREAGE
PERCENTAGE
DISTURBED
5.96 AC
7.34%
UNDISTURBED
0
75.21 AC
92.66%
EX. BUA
UTEJTY POLE
15.74 AC
19.39%
PROP. BUA
SA14TARY SEWER LINE - -
2.14 AC
2.64%
TOTAL BUA
QS
17.88 AC
22.03%
EX. PERVIOUS
SIGN
65.43 AC
80.61%
PROP. PERVIOUS
-2.14 AC
-2.64%
TOTAL PERVIOUS
63.29 AC
77.97%
PARKING INFORMATION
TOTAL
SPACES
3 ``' �
282 SPACES REQ. FOR PREY. PERMITTIED SCHOOLS.
FOR PROP. SCHOOL 1 SPACE /300 SF OF ADMIN & 3
A 601
CLASSROO SSPACES/CLASS.
20 SPACES. 282+13+60-355
UTILITY
INFORMATION
SIZE
TYPE LOCATION
�
SANITARY SEWER
8"
VCP ON -SITE
WATER
8"
DI ON SITE
STORM SEWER I VARIES VARIES ON SITE
ELECTRIC UNDERGROUND ON SITE
GAS UNDERGROUND ON SITE
OWNER INFORMATION
OWNER /DEVELOPER
GUILFORD COUNTY EOARD OF
EDUCATION
712 N. EUGENE ST
GREENSBORO, NC 27401
LEGEND
ls(
NAL SET/FOUND
RON PIPE FOUND
0
RON PIPE SET
0
NC DOT RIGHT-- OF-WAY OW
e
UTEJTY POLE
Line Legend
UTILITY POLE
SA14TARY SEWER LINE - -
GUY WIRE
(SI2E d� TYPE AS NOTED)
QS
SANITARY SEWER MANHOLE
OVERHEAD UTAH CNer
SIGN
"Sul TEMP
Ow
WATER METER
TREEIM
FIRE HYDRANT
WATERLINE W
©
GAS VALVE
N12&4
SPOT ELEVATION
DMUE LINE ..
NA
NOW OR FORMERLY
TREE PROTECTION LINE - • --
E/P EDGE OF PAVEMENT
DIP DUCTRE IRON PIPE
N
o
rn
W �Q
W
Ai 0
as
=�s lu1�
'f
� . ° -EL
N Q!
a �
O N
�0a.
a
u�
0
N
V
Uad
Z
�
M
W
a
0
"
to
�wzz
cn
0
0
H
c!1
® Z
O
t4 0�4
� 0< ° J
F�1
O � w
~ Za
w
W
0
1=
d
O
J
BEFORE YOU DIG!
CONTACT ONE -CALL CENTER
1- 800 - 6324949
® ® ®®eeese.se. n!
� %A CA)g*
a�
r
'�aieeii� ►•" P -057
#I DATE I ISSUED FOR
PROJECT NO. E -1107
DATE: 9/6/12
SCALE: 1" = 10'
DWG. BY: Mew
CHK. BY: VWS
IOCELL
PLAN
C 5.0

1
PROP. YARD INLET OVERFLOW e�
\ COG STD. NO 424
A \ \ THROAT ELEV. 765.50 1 YEAR /24 HOUR STORM: 765.34
lia SEE PLAN VIEW FOR INVERTS 2 YEAR /24 HOUR STORM: 765.50 gURUNGT�I RD. w � o°
\ TOP OF PONDING 10 YEAR /24 HOUR STORM: 765.69 p � 6.
ELEV. = 765.50 E. BESSEMER AVE. g
\ 100 YEAR /24 HOUR STORM: 765.85 �
\\ \ \ \ \ TOP SOD GRASS AND c
BOTTOM PONDING ELEVATION z o
BIO AREA = 764.50 2 E
\ \ \ ` 12" PONDING DEP BOTTOM OF SOD ly v O x
\ \ V. X 00 3 GRASS ELEV. 764.33 qC0 RO N a '6 " R 8
v
3 - B O: W i2 g as
\ \ \ 1 2" Q.� j o o �° S tS
\ \ I 4 Q .7
�PLANTIN SOJI MIXTURE 2' -0"
FILTER a •�.
\ �j, FABRIC "
4 WASHED SAND g 3
\ �l I TOP OF STONE: 762.00 c:
g 'I
WASHED #57 STONE S R. 3001 01 � u
\ \ \ f \ 1 E a
12" SCH 40 PVC 4" SCH 40 PVC PERFORATED UNDERDRAIN ® ° °
1 \ \ \ \ \ t \ ( \ \ \ OUTFALL 0 0.5% �
JNV.: 759.97 59 V.• 7 7 \ \ \ \ \ \ \ SHWT BELOW: 751.00
U'T EA b YP) 6T \ \\ \ \ \ _ »_
�BIORETENTION AREA CROSS SECTION \ \ � \ � � NTS VICINITY MAP 1 -.2000 V
NV.-\759.97 \ 1-i \ \
PROP. Y D INL T OW \ \ ' \ \ �1
COG STD. No 42 \ SITE INFORMATION
\ \ �ROAT E V: 76 \ \ /\
IN Vi OUT: 59.97 \ ` \ �, `� \ \ \ \ _ SEDIMENT DEPTH STAKE _ -., Ui
VCf �
Wi0A4= l .lA VINU101vr%ou-V 10.41 Mo 94VV /•
-10 Q ( )(4 24) /
. . .n LEVEL SPREADER D TATL Q m -- 0 80 CFS
PROP. BUA 2.14 AC 2.64%
\ \ \I \ ®
TOTAL BUA 17.88 AC 22.03% Z
BIORETENTION AREA NOTES: EX. PERVIOUS 65.43 AC 80.61% ® Z
0
,�^� �1. PLANTING SOIL SHALL BE HOMOGENIOUS SOIL MIXTURE FREE OF STONES, STUMPS, ROOTS, OR OTHER SIMILAR MATERIAL GREATER PROP. PERVIOUS -2.14 AC -2.64% p p Q
\ \ v v O v THAN 2 AND SHALL BE 85 % -8890 SAND, 3% -5% ORGANIC, AND 8 % -12% FINES (BY VOLUME). Q
V , TOTAL PERVIOUS 63.29 AC 77.97% 0z
O lL
2. BIO RETENTION AREA UNDER DRAIN SHALL BE SCHEDULE 40 PVC AND SHALL BE UNDERLAIN WITH GEOTEXTILE FABRIC. THE -JO
O \ \ \ i -� BOTTOM OF THE SLOPE SHALL HAVE A POSITIVE SLOPE TOWARD THE PIPE. LONGITUDINAL DRAIN SLOPES SHALL HAVE AN PARKING INFORMATION Q o _�
p \ , APPROXIMATE GRADE OF 0.5 %. TOTAL 282 SPACES REQ. FOR PREV. PERMITTTED SCHOOLS. ` � � V � U
\ \ \ \ v` SPACES FOR PROP. SCHOOL. 1 SPACE 300 SF OF ADMIN & 3 �.�/ Q a-
\ - o \ , ' \ 3. PHOSPHORUS INDEX OF THE SOIL MIX SHALL BE BETWEEN 10 AND 30. PA - 0 ~ Z =
\ \ •V, , S CESjCLASS. ADMtN -4000 SF =13 SPACES. M N
\ \ ® � i �-\ 356
CLASSROOMS =20 860 SPACES. 282 +13+608355 ® O
o \ ��� 4. PERMEABILITY SHALL BE BETWEEN 1 INCH PER HOUR AND 6.0 INCH PER HOUR. 1 -2 INCHES PER HOUR IS PREFERRED. 0 Z
UTILITY INFORMATION °
5. UNDERDRAIN PIPES SHALL HAVE A MINIMUM OF 4 ROWS OF PERFORATIONS AROUND THE DIAMETER OF THE PIPE (MORE FOR
t \ \ \ \ O PIPES 10 INCHES IN DIAMETER AND LARGER), AND THE PERFORATIONS SHALL BE PLACED 6 INCHES ON CENTER WITHIN EACH ROW SPZE TYPE LOCATION W
\ \ \ \ \ \ \ \ FOR THE ENTIRE LENGTH OF THE DRAINAGE LATERAL. PERFORATIONS SHALL BE 3/8" IN DIAMETER. ~ i
SANITARY SEWER 8" VCP ON -SITE
6. PLANTING SOIL MIX SHALL BE TESTED BY AN APPROVED LAB PRIOR TO PLACEMENT.
7. CONTRACTOR SHALL PROVIDE WATER AS NECESSARY TO ENSURE VEGETATION IS PROPERLY ESTABLISHED. WATER 8" DI ON SITE �
\ \ \ O \ \ \8. CONTRACTOR SHALL CERTIFY TO THE ENGINEER THAT THE INSTALLED SYSTEM MEETS ALL DESIGN SPECIFICATION UPON INITIAL STORM SEWER VARIES VARIES ON SITE
OPERATION ONCE THE PROJECT IS COMPLETE. G,oQNM ST col
, \ \ ` ' \ 9. CONTRACTOR TO PROVIDE STORMWATER SERVICES AND THE ENGINEER WITH A SOIL MEDIA PERMEABILITY TEST REPORT ONCE THE ELECTRIC UNDERGROUND ON SITE 4:�V. \� A ;P, 01
_PLANTING SOIL IS IN PLACE. �� J� c:3 F�
\ \ \ GAS UNDERGROUND ON SITE A A
10. WHEN USING SOD, AVOID SOD THAT IS GROWN IN SOIL THAT HAS AN IMPERMEABLE LAYER (SUCH AS CLAY). w Z =
CONSTRUCTION SEQUENCE FOR BIO- RETENTION CELL: OWNER INFORMATION Q o n m
1. ONCE THE UPSTREAM SITE IS STABILIZED, REMOVE EXISTING EROSION CONTROL OWNER/DEVELOPER y
t MEASURES.
f %
2. RE- EXCAVATE AREA FOR BIO -CELL. GUILFORD COUNTY BOARD OF
INSTALL GEOTEXTILE FABRIC IN THE BIO -CELL AREA. ENGINEERS CERTIFICATION OF STORMWATER QUALITY CONTROL EDUCATION
4. INSTALL PVC PERFORATED UNDERDRAIN. 712 N. EUGENE ST
1 CERTIFY THAT, PURSUANT TO GENERALLY ACCEPTED ENGINEERING BEFORE YOU DIG!
OIL MIXTURE. STANDARDS IN THE COMMUNITY,
5. INSTALL WASHED #57 STONE, WASHED SAND, GEOTEXTILE FABRIC AND PLANTING IT IS MY PROFESSIONAL OPINION THAT GREENSBORO, NC 27401 CONTACT ONE -CALL CENTER
S
RUNOFF FROM THE FIRST INCH OF RAIN FROM AREAS THAT ARE
6. CONSTRUCT FOREBAY PER DETAIL. REQUIRED TO BE CONTROLLED PER SECTION 30 -7 -1.12 OF THE 1- 800 - 632 4949
7. CONSTRUCT LEVEL SPREADER AND FILTER STRIP. GREENSBORO DEVELOPMENT ORDINANCE IS CONTROLLED BY A
�/ \ \J� / \, I ' 8. PLANT GRASS /SOD. PERMANENT ENGINEERED STORMWATER QUALITY CONTOL THAT HAS BEEN LEGEND
i HEN I ' I \ '' �i I PROP. A D I T I ' I 9. RESEED/ STABILIZE DISTURBED AREAS IMMEDIATELY AFTER FINISHED GRADES HAVE DESIGNED TO MEET OR EXCEED THE REQUIREMENTS IN THE GREENSBORO o Nc
\ I COG S 0 4 4 ' BEEN ACHIEVED. TEMPORARY VEGETATIVE COVER SHALL BE PROVIDED OVER STORMWATER MANAGMENT MANUAL '®° ••,.,• O �s�
i I THROAT V: 5.:50 DISTURBED AREAS WHICH MAY NOT BE AT FINAL GRADE BUT WHICH WILL BE LEFT �C � / �.De.•OFES q% 1, -,
I \ I I I
INV. IN 20 UNDISTURBED FOR AT LEAST 15 DAYS. IRON PIPE FOUND � ,.
lb
I INV. OJT: 7 .00 '' oororrrr ®,.® . • OW WE SET QUANTITY CONTROL CERTIFICATION �.o °¢'�N CARG�� ® ®� ® W DO RMW of -WAr Ir�sc ;�, :, 0 A 2 1.
„
THE PROPOSED IMPROVEMENTS (10.11 AC) REPRESENT LESS THAN 10% OF THE �Da.QOFESSipy. 'L : UIRM POLE Line Legend •; ai•� G N �1 .0
759 <<:4 I f DRAINAGE AREA AT THE SITE OUTLET (109.41 AC) THEREFORE NO QUANTITY •�-" AL »TM sArmARV sEwER I�+E - - - - -- - - - °yq�` •�••'••• �G`�
CONTROL IS REQUIRED. :� 0 2 ' �® < GUY WIRE (SIZE � 7t K- As NOTE�T •es� $ WESo+
••. F� o` ® sANITARY sEwER MANF"YE oYERNEAD UTILITY clrr "�•ir.r►•o P -0571
I v.: 75x.2 ' I I IF STORMWATER INUNDATES THE BIO -CELL FOR MORE THAN •.�' '•. N•' G.` -II- SAN s' �N�( TEMP
( - .�q� ••••• 5 ® ®. c&NN� # DATE ISSUED FOR
72 HOURS AFTER A STORM EVENT THE BIO CELL IS NOT .�� B E o © WATER METER
I P.E. SEAL �� N1 :. TREEUNE ^
7.2" ' ( ( FUNCTIONING AS INTENDED AND A PROFESSIONAL ENGINEER SIGNATURE r ° °0° FEE NµT
I SHALL BE CONSULTED FOR REMEDIAL PLANS. PLANS SHALL DAB cAS VALVE wA' W
I i I EAN OUT (TYP4/ Cy p ! BE FORWARDED TO THE GOVERNMENTAL OFFICE HAVING ©
%M4 SPOT ELEVATK>ri DMiJE LINE
i �°►� I JURISDICTION FOR WATERSHED PROTECTION FOR APPROVAL. N/F NOW OR FOGY 10N
TREE PROTEC1 LINE -- - -
MAINTENANCE REQUIREMENTS FOR BIORETENTION AREAS NOTE: THE ENGINEER'S CERTIFICATION OF COMPLETION WILL BE E/P EDGE OF PAVEMENT
REQUIRED PRIOR TO THE FINAL PLAT OR CERTIFICATE OF OCCUPANCY
71�
R. VEI R
\V A EE DTH T
v B10 CELL. I 600
**
ALL B 10 ,CELL PIPES AR AT 5 �L P E , MIN. I
DESCRIPTION
I METHOD
FREQUENCY
TIME OF YEAR
SOIL
INSPECT AND
VISUAL
MONTHLY
MONTHLY
REPAIR
PLANTS
REMOVE AND REPLACEMENT
SEE
3/15 TO 4/30
OF ALL DEAD AND DISEASED
PLANTING
AND
VEGETATION CONSIDERED
SPECIFI-
10/1 TO 11/30
BEYOND TREATMENT
CATION
WATER OF PLANT MATERIAL
SHALL TAKE PLACE AT END
IMMEDIATELY
OF EACH DAY FOR 14
BY HAND
AFTER
N/A
CONSECUTIVE DAYS AND
COMPLETION OF
AFTER PLANTING HAS BEEN
PROJECT
COMPLETED
INSPECT PLANTS TO ENSURE
THEY REMAIN HEALTHY;
VISUAL/BY
AFTER PERIODS
REPLACE AS NEEDED WITH
HAND
OF PROLONGED
WHENEVER NEEDED
SIMILAR PLANTS.
INUNDATION
I
THE STORMWATER CONTROL IS TO BE INSPECTED TO ENSURE IT IS ow DUCTLE IM PIPE
FUNCTIONING AS DESIGNED AND HAS FULL DESIGN VOLUME PRIOR TO
ISSUANCE OF ANY CERTIFICATE OF OCCUPANCY.
NOTE: THE PROPERTY OWNER IS RESPONSIBLE FOR MAINTAINING THE PROJECT NO. E -1107
STORMWATER CONTROL(S) ACCORDING TO THE APPROVED MAINTENANCE DATE' 9/6/12
PLAN AND DIRECTIONOF THE CITY OF GREENSBORO.
NOTE: THE CITY OF GREENSBORO AND THEIR ASSIGNS HAVE THE SCALE: 1" = 10'
RIGHT TO ACCESS THE STORMWATER CONTROLS) FOR INSPECTIONS OR DWG. BY: MBW
MAINTENANCE, AS NECESSARY
CHK. BY: VWS
GRAPHIC SCALE
10 0 5 10 20
Mid 6=mmJ
1 " =10'

_D­'-E-M-E-N--T-
13.8 PG 117
W_
_', _DMUE__OVER AND 15 ; VEL DRI VE
BIO -CELL #3 PLAN
in = 10,
1** ALL BIO -CELL PIPES ARE AT 0.5% SLOPE MIN.
INFLOW CALCULATION
Q,o/-- CI A
0,1w=(0.9)(0.21)(11.56)
Qmm --0.29 CFS
QUANTITY CONTROL CERTIFICATION
THE PROPOSED IMPROVEMENTS (10.11AC) REPRESENT LESS
THAN 10% OF THE DRAINAGE AREA AT THE SITE OUTLET
(109.41 AC) THEREFORE NO QUANTITY CONTROL IS
REQUIRED.
ENGINEER'S CERTIFICATION OF STORMWATER QUALITY CONTROL
I CERTIFY THAT, PURSUANT TO GENERALLY ACCEPTED ENGINEERING
STANDARDS IN THE COMMUNITY, IT IS MY PROFESSIONAL OPINION THAT
RUNOFF FROM THE FIRST INCH OF RAIN FROM AREAS THAT ARE
REQUIRED TO BE CONTROLLED PER SECTION 30 -7 -1.12 OF THE
GREENSBORO DEVELOPMENT ORDINANCE IS CONTROLLED BY A
PERMANENT ENGINEERED STORMWATER QUALITY CONTOL THAT HAS BEEN
DESIGNED TO MEET OR EXCEED THE REQUIREMENTS IN THE GREENSBORO
STORMWATER MANAGMENT MANUAL.
P.E. SEAL
SIGNATURE
DATE
NOTE: THE ENGINEER'S CERTIFICATION OF COMPLETION WILL BE
REQUIRED PRIOR TO THE FINAL PLAT OR CERTIFICATE OF OCCUPANCY.
THE STORMWATER CONTROL IS TO BE INSPECTED TO ENSURE IT IS
FUNCTIONING AS DESIGNED AND HAS FULL DESIGN VOLUME PRIOR TO
ISSUANCE OF ANY CERTIFICATE OF OCCUPANCY.
NOTE: THE PROPERTY OWNER IS RESPONSIBLE FOR MAINTAINING THE
STORMWATER CONTROL(S) ACCORDING TO THE APPROVED MAINTENANCE
PLAN AND DIRECTIONOF THE CITY OF GREENSBORO.
NOTE: THE CITY OF GREENSBORO AND THEIR ASSIGNS HAVE THE
RIGHT TO ACCESS THE STORMWATER CONTROL(S) FOR INSPECTIONS OR
MAINTENANCE, AS NECESSARY
0
1 2' DEEP
SEDIMENT DEPTH STAKE
MARK STAKE AT DEPTH OF
1.0' FOR CLEANOUT
0
0
CLASS 11 RIP -RAP
3' THICK
FOREBAY DETAIL (N.T.S.)
I: ! " N . .
1. PLATING SOIL SHALL BE HOMOGENIOUS SOIL MIXTURE FREE OF STONES, STUMPS,
ROOTS, OR OTHER SIMILAR MATERIAL GREATER THAN 2" AND SHALL BE 85 % -88% SAND,
3 % -5% ORGANIC, AND 8 % -12% FINES (BY VOLUME).
2. BIO :RETENTION AREA UNDER DRAIN SHALL BE SCHEDULE 40 PVC AND SHALL BE
UNDERLAIN WITH GEOTEXTILE FABRIC. THE BOTTOM OF THE SLOPE SHALL HAVE A
POSITIVE SLOPE TOWARD THE PIPE. LONGITUDINAL DRAIN SLOPES SHALL HAVE AN
APPROXIMATE GRADE OF 0.5 %.
3. PHCSPHORUS INDEX OF THE SOIL MIX SHALL BE BETWEEN 10 AND 30.
4. PERMEABILITY SHALL BE BETWEEN 1 INCH PER HOUR AND 6.0 INCH PER HOUR. 1 -2
INCHES PER HOUR IS PREFERRED.
5. UNCi :RDRAIN PIPES SHALL HAVE A MINIMUM OF 4 ROWS OF PERFORATIONS AROUND
THE DIAMETER OF THE PIPE (MORE FOR PIPES 10 INCHES IN DIAMETER AND LARGER),
AND TIE PERFORATIONS SHALL BE PLACED 6 INCHES ON CENTER WITHIN EACH ROW FOR
THE Eh TIRE LENGTH OF THE DRAINAGE LATERAL. PERFORATIONS SHALL BE 3/8" IN
DIAMETER.
6. PLATING SOIL MIX SHALL BE TESTED BY AN APPROVED LAB PRIOR TO PLACEMENT.
7. CONTRACTOR SHALL PROVIDE WATER AS NECESSARY TO ENSURE VEGETATION IS
PROPE=LY ESTABLISHED.
8. CONTRACTOR SHALL CERTIFY TO THE ENGINEER THAT THE INSTALLED SYSTEM MEETS
ALL DESIGN SPECIFICATION UPON INITIAL OPERATION ONCE THE PROJECT IS COMPLETE.
9. CONTRACTOR TO PROVIDE STORMWATER SERVICES AND THE ENGINEER WITH A SOIL
MEDIA :PERMEABILITY TEST REPORT ONCE THE PLANTING SOIL IS IN PLACE.
10. WriEN USING SOD, AVOID SOD THAT IS GROWN IN SOIL THAT HAS AN IMPERMEABLE
LAYER ;SUCH AS CLAY).
ELEV.
3
1 1 ( r
�,
X -
ti
\STMH�'
PROP. YARD INLET OVERFLOW
COG STD. NO 424 _
THROAT ELEV: 784.00
IN V.: 778.83
TOP OF PONDING
ELEV.: 784.00 _
12" DEPTH-
3
DEP
�1
FILTER
FABRIC
1 YEAR /24 HOUR STORM: 783.56
2 YEAR /24 HOUR STORM: 783.63
10 YEAR /24 HOUR STORM: 783.75
100 YEAR /24 HOUR STORM: 783.88
TOP SOD GRASS AND
BOTTOM PONDING ELEVATION
BIO AREA - 783.00
BOTTOM OF SOD
,/- GRASS ELEV: 782.67
n
MIXTURE in V -0"
4" WASHED SAND
' OF STONE: 780.34
--- WASHED #57 STONE
8" SCH 40 PVC 8" SCH 40 PVC PERFORATED UNDERDRAIN
OUTFALL ® 0.5%
SHWT BELOW: 770.00
BIORETENTION AREA CROSS SECTION
NTS
IF STORMWATER INUNDATES THE BIO -CELL FOR MORE THAN
72 HOURS AFTER A STORM EVENT THE BIO -CELL IS NOT
FUNCTIONING AS INTENDED AND A PROFESSIONAL ENGINEER
SHALL BE CONSULTED FOR REMEDIAL PLANS. PLANS SHALL
BE FORWARDED TO THE GOVERNMENTAL OFFICE HAVING
JURISDICTION FOR WATERSHED PROTECTION FOR APPROVAL.
MAINTENANCE REQUIREMENTS FOR BIORETENTION AREAS
DESCRIPTION
METHOD
FREQUENCY
TIME OF YEAR
SOIL
INSPECT AND
REPAIR
VISUAL
MONTHLY
MONTHLY
SCHOOL
PLANTS
REMOVE AND REPLACEMENT
SEE
138 -117 28 -91
3/15 TO 4/30
OF ALL DEAD AND DISEASED
PLANTING
81.17 ac.
AND
VEGETATION CONSIDERED
SPECIFI-
5.2%
10/1 TO 11/30
BEYOND TREATMENT
CATION
EnB, EnC, HhB, WkD, CcB
g p
WATER OF PLANT MATERIAL
PROP. PERVIOUS
-2.14 AC
Y
SHALL TAKE PLACE AT END
TOTAL PERVIOUS
IMMEDIATELY
OAS VALVE
OF EACH DAY FOR 14
CONSECUTIVE DAYS AND
BY HAND
COMPLETION OF
N/A
AFTER PLANTING HAS BEEN
C
2 A
PROJECT
UTILITY INFORMATION
COMPLETED
LOCATION
DIP
DUCTILE IRON PIPE
INSPECT PLANTS TO ENSURE
VISUAL/BY
AFTER PERIODS
WATER
THEY REMAIN HEALTHY;
REPLACE AS NEEDED WITH
HAND
OF PROLONGED
WHENEVER NEEDED
ON SITE
ELECTRIC
INUNDATION
ON SITE
SIMILAR PLANTS.
UNDERGROUND
ON SITE
CONSTRUCTION SEQUENCE FOR _BIO- RETENTION CELL:
1. ONCE THE UPSTREAM SITE IS STABLIZED, REMOVE EXISTING
EROSION CONTROL MEASURES.
2. RE- EXCAVATE AREA FOR BIO -CELL.
3. INSTALL GEOTEXTILE FABRIC IN THE BIO -CELL AREA.
4, INSTALL PVC PERFORATED UNDERDRAIN.
5. INSTALL WASHED X57 STONE, WASHED SAND, GEOTEXTILE FABRIC
AND PLANTING SOIL_ MIXTURE.
6. CONSTRUCT FOREBAY PER DETAIL.
7, CONSTRUCT LEVEL SPREADER AND FILTER STRIP.
8. PLANT GRASS /SOD.
9. RESEED/ STABILIZE DISTURBED AREAS IMMEDIATELY AFTER
FINISHED GRADES HAVE BEEN ACHIEVED. TEMPORARY
VEGETATIVE COVER SHALL BE PROVIDED OVER DISTURBED AREAS
WHICH MAY NOT BE AT FINAL GRADE BUT WHICH WILL BE LEFT
UNDISTURBED FOR AT LEAST 15 DAYS.
GRAPHIC SCALE
10 0 5 10 20
_... wraON RD.
Z
(~/) F U
a
w
U W
b
VICINITY MAP - 1 "= 2000'
SITE INFORMATION
EX. ZONING
PI
PROP. ZONING
PI
CURRENT LANDUSE
SCHOOL
PROP. LANDUSE
SCHOOL
TAX MAP NUMBER
00 -03- 0146 -0- 0499 -00 -003
PLAT REFERENCE
138 -117 28 -91
DEED REFERENCE
4941 -1176 4984 -2117
TOTAL AREA
81.17 ac.
WATERSHED
-
AVERAGE SLOPE
5.2%
DISTANCE TO
NEAREST FEMA
FLOOD PLAIN
4900'
SOILS
EnB, EnC, HhB, WkD, CcB
OWNER INFORMATION
OWNER /DEVELOPER
GUILFORD COUNTY BOARD OF
EDUCATION
712 N. EUGENE ST
GREENSBORO, NC 27401
LEGEND
x
ACREAGE
PERCENTAGE
DISTURBED
5.96 AC
0
7.347.
UNDISTURBED
75.21 AC
NC DOT RIGHT-Of-WAY DISC
92.66%
EX. BUA
15.74 AC
Line Legend
19.39%
PROP. BUA
2.14 AC
_<
2.64%
TOTAL BUA
17.88 AC
SANITARY SEVER PIOLE
22.03%
EX. PERVIOUS
65.43 AC
g p
80.61%
PROP. PERVIOUS
-2.14 AC
Y
-2.647o
TOTAL PERVIOUS
63.29 AC
OAS VALVE
77.97%
PARKING INFORMATION
TOTAL
SPACES
356
282 SPACES REQ. FOR PREY. PERMITTTED SCHOOLS.
FOR PROP. SCHOOL 1 SPACE /300 SF OF ADMIN & 3
C
2 A
CLAS'SR00 SS SPACES. 282 +13 +60 355
0 601
UTILITY INFORMATION
SIZE TYPE
LOCATION
DIP
DUCTILE IRON PIPE
SANITARY SEWER
8" VCP
ON -SITE
WATER
8" DI
ON SITE
STORM SEWER
VARIES VARIES
ON SITE
ELECTRIC
UNDERGROUND
ON SITE
GAS
UNDERGROUND
ON SITE
OWNER INFORMATION
OWNER /DEVELOPER
GUILFORD COUNTY BOARD OF
EDUCATION
712 N. EUGENE ST
GREENSBORO, NC 27401
LEGEND
x
WX SET/FOUND
RtON PIPE FOUND
0
IRON PIPE SET
0
NC DOT RIGHT-Of-WAY DISC
a
U71UTY POLE
Line Legend
X:�
U-nuTl POLE
SANITARY SEWER LINE (SIZE do T/PE AS NOTED) - -
_<
GUY WIRE
1
�S
SANITARY SEVER PIOLE
ON �TM
SM
g p
GD
WATER METER
1REajE
Y
FEtE HYDRANT
WATERINE W
©
OAS VALVE
k=4
SPOT ELEVATION
DMUE UNE
N/F
NOW OR FORMERLY
TREE PROTEc7m UK -- -
EA
EDGE OF PAVEMENT
DIP
DUCTILE IRON PIPE
Zc`ZW
N
O
c'�
88 �
:R C:65
•a � n 3
W
`os ids F
It
u
I W
Ila
a
a
1
0
�ON�0
Vcu
Zc`ZW
a
0
wzw�
Z
Ito
�C,
-+U�''
}
® Z
0
04
Qoz
O
J J
w w�0
o0Q
UZ U
10� Z d
E-+ M 0 Z
65
a
v
O
BEFORE YOU DIG!
ACT ONE-CALL CENTER
1- 800 - 6324949
s
e
see P -057
DATE I ISSUED FOR
PROJECT NO. E -1107
DATE: 9/6/12
SCALE: 1 " = 10'
DWG. BY: MBW
CHK. BY: VWS
(o
PLAN