141-10 OVERSIZE DRAINAGE PLANS

TOPSOIL (SEE LANDSCAPE PLAN)
ELEV. 6.35
ELEV. 5.85
__---- 6" of BACKFILL WITH SUITABLE
EXCAVATED MATERIAL OR
SELECT FILL IF ORDERED
BY ENGINEER.
MATERIAL TO BE THOROUGHLY
5" COMPACTED IN 6" TO 12" LIFTS OR
(TYP) AS DIRECTED BY ENGINEER. (TYP.)
'~-8$' PERFORATED HDPE PIPE (SEE PLAN)
NTTRE STONE TRENCH BED TO
BE WRAPPED IN FILTER FABRIC
3/4" CLEAN CRUSHED STONE BEDDING
TYPICAL STORM BED DETAI
NOT TO SCALE
SYSTEM
(4- HOPE PIPE)
30' ELBOW -/
'Y" BRANCH OR
DOUBLE "Y"
BRANCH
PROPOSED 4' HOPE
STORM SEWER PIPE
PLAN
Y" BRANCH OR SADDLE
EE WITH RUBBER SEAL
DPENING TO BE
)RILLED IN PIPE)
PROPOSED 8" HOPE PIPE
SUBSURFACE STORMWATER BASIN Q
FOUNDATION CUSHION v T
SECTION \ •\,\�`
STORMWATER CONNECTION DETAIL
NOT TO SCALE
NOTE: REFER TO UTILITY PLAN FOR PIPE SIZES, VERIFY WITH ARCHITECTURAL PLANS.
CONTACT ENGINEER WITH ANY CONFLICTS PRIOR TO ANY CONNECTION WORK.
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PLAN
SECTION
CLEAN -OUT TYPICAL.
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DISTANCE (FT) RAIN GARDEN
SECTION A -A' (NOT TO SCALE)
Calculations for Roof Runoff
House Roof Area = 2900 sf total
1.5in x 2900 sf / 12 = 362.5 cf
Stone Pipe Trench Size
Total Volume = Volume of Pipe + Volume of Stone
Volume of Pipe = 8" Perforated HDPE Area x 327 If = 114.50 cf
Volume of Stone = (1.5' x 1.5' - 8" HDPE Area) x 3.27 If x 0.4 = 248.5 cf
Total Volume = 363 cf
Calculations for Driveway Runoff
Driveway Area = 1,225 sf total to Rain Garden
1.5in x 1,225 sf / 12 = 153 cf
Infiltration Volume of Rain Garden
Total Volume = (Elevation 4.30' Area -Elevation 4.80' Area)/2
Total Volume = (320 sf - 566 sf)/2 = 154 cf
Volume of System = 154 cf > Tributary Volume = 153 cf
5B. ,37 ACRES -
P/O PARCEL 2.34N([2001
)
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MARSH AREA
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PROPOSED RAIN
GARDEN AREA
APPROX. AREA 600 SF J3.8 6
(SEE DETAIL)
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WEST DOLPHIN \/ E
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DRIVEWAY DRAINAGE
AREA
DRAINAGE AREA MAP
SCALE 1" =40
G 3.95 I WFTI AND AREA 1 II- - -
3,608 SQ. FT.
6.35 0.083 ACRES S
WETLAND AREA 2 W
3,926 SQ. FT.
PROPOSED ROOF LEADERS 0,090 AREAS
3.68' TO CONNECT TO SUBSURFACE U
STONE TRENCH SYSTEM (2 TYP.)
- SETBACKS -1
} ZONING= OK-R- 6 U m
n PROPOSED LIMIT OF DISTURBANCE FRONT=25'
APPROXIAMTELY 16,050 SF
G 3.90REAR=20' Q
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SIDES= 8
MAY VARY n 0
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/o - LOT AREA -
I NV. 4.63 ; 0.482 ACRES
G 4.50 21,000 SQ. FT. 4_1
OCEAN
G 4.50 P OSI ON ----------------
G 3.85 ZONE
DISTANCE TO STATIC
f" LINE VEGETATION(OCEAN
SIDE) 445
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- NOTES -
1. ALL DISTANCES SHOWN ARE HORIZONTAL BIG DAVIS CANAL
GROUND DISTANCES IN U.S. SURVEY FEET.
2. COORDINATES OBTAINED FROM NC VRS. I
3. PARCEL #234NBO1707 U)
4. THAT THE SURVEY IS OF AN EXISTING (-
PARCEL OR PARCELS OF LAND; W U
5. PROPERTY ADDRESS IS: Q
706 WEST DOLPHIN DRIVE. CL
OAK ISLAND, NC 28465 c)
SITE 0
- FEMA -
FIRM: 3720205600 J WEST DOLPHIN DR
EFFECTIVE DATE: JUNE 2, 2006 0
ZONES: AE-15
WEST BEACH DRIVE
- REFERENCES -
(BRUNSWICK COUNTY REGISTER OF DEEDS) ATLANTIC OCEAN
1. DEED BOOK 1350, PAGE 756
2. MAP BOOK 2.5, PAGE 264 VICINITY MAP
(NOT TO SCALE)
GRADING & UTILITY NOTES (AS APPLICABLE):
1. LOCATION OF ALL EXISTING AND PROPOSED SERVICES ARE APPROXIMATE AND MUST BE CONFIRMED INDEPENDENTLY WITH LOCAL UTILITY
COMPANIES PRIOR TO COMMENCEMENT OF ANY CONSTRUCTION OR EXCAVATION. SANITARY SEWER AND ALL OTHER UTILITY SERVICE
CONNECTION POINTS SHALL BE CONFIRMED INDEPENDENTLY BY THE CONTRACTOR IN FIELD PRIOR TO THE COMMENCEMENT OF
CONSTRUCTION. ALL DISCREPANCIES SHALL BE REPORTED IMMEDIATELY IN WRITING TO THE ENGINEER. CONSTRUCTION SHALL COMMENCE
BEGINNING AT THE LOWEST INVERT (POINT OF CONNECTION) AND PROGRESS UP GRADIENT. PROPOSED INTERFACE POINTS (CROSSINGS)
WITH EXISTING UNDERGROUND UTILITIES SHALL BE FIELD VERIFIED BY TEST PIT PRIOR TO COMMENCEMENT C MENT OF CONSTRUCTION.
2. ALL UTILITIES AND SERVICES INCLUDING BUT NOT LIMITED TO GAS, WATER, ELECTRIC, SANITARY AND STORM SEWER, TELEPHONE, CABLE,
FIBER OPTIC CABLE, ETC. WITHIN THE LIMITS OF DISTURBANCE SHALL BE VERTICALLY AND HORIZONTALLY LOCATED. THE CONTRACTOR
SHALL USE AND COMPLY WITH THE REQUIREMENTS OF THE APPLICABLE UTILITY NOTIFICATION SYSTEM TO LOCATE ALL THE UNDERGROUND
UTILITIES. THE CONTRACTOR IS RESPONSIBLE FOR REPAIRS OF DAMAGE TO ANY EXISTING UTILITIES DURING CONSTRUCTION AT NO COST TO
THE OWNER.
3. IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO REVIEW ALL OF THE DRAWINGS AND SPECIFICATIONS ASSOCIATED WITH THE PROJECT
WORK SCOPE PRIOR TO THE INITIATION OF CONSTRUCTION. SHOULD THE CONTRACTOR FIND A CONFLICT WITH THE DOCUMENTS RELATIVE
TO THE SPECIFICATIONS OR THE RELATIVE CODES, IT IS THE CONTRACTOR'S RESPONSIBILITY TO NOTIFY THE PROJECT ENGINEER OF RECORD
IN WRITING PRIOR TO THE START OF CONSTRUCTION. FAILURE BY THE CONTRACTOR TO NOTIFY THE PROJECT ENGINEER SHALL
CONSTITUTE ACCEPTANCE OF FULL RESPONSIBILITY BY THE CONTRACTOR TO COMPLETE THE SCOPE OF WORK AS DEFINED BY THE
DRAWINGS AND IN FULL. COMPLIANCE WITH LOCAL REGULATIONS AND CODES.
4. DEFINE AND LOCATE VERTICALLY AND HORIZONTALLY ALL ACTIVE UTILITY AND/OR SERVICE SYSTEMS THAT ARE TO BE REMOVED. THE
CONTRACTOR IS RESPONSIBLE TO PROTECT AND MAINTAIN ALL ACTIVE SYSTEMS THAT ARE NOT BEING REMOVED/RELOCATED DURING SITE
ACTIVITY.
5. THE CONTRACTOR SHALL FAMILIARIZE THEMSELVES WITH THE APPLICABLE UTILITY SERVICE PROVIDER REQUIREMENTS AND IS RESPONSIBLE
FOR ALL COORDINATION REGARDING UTILITY DEMOLITION AS IDENTIFIED OR REQUIRED FOR PROJECT. THE CONTRACTOR SHALL PROVIDE
THE OWNER WRITTEN NOTIFICATION THAT THE EXISTING UTILITIES AND SERVICES HAVE BEEN TERMINATED AND ABANDONED IN ACCORDANCE
WITH JURISDICTION AND UTILITY COMPANY REQUIREMENTS.
6. CONTRACTOR IS RESPONSIBLE FOR COORDINATION OF SITE PLAN DOCUMENTS AND ARCHITECTURAL DESIGN FOR EXACT BUILDING UTILITY
CONNECTION LOCATIONS, GREASE TRAP REQUIREMENTS/DETAILS, DOOR ACCESS, AND EXTERIOR GRADING. THE UTILITY SERVICE SIZES ARE
TO BE DETERMINED BY THE ARCHITECT. THE CONTRACTOR SHALL COORDINATE INSTALLATION OF UTILITIES/SERVICES WITH THE INDIVIDUAL
COMPANIES, TO AVOID CONFLICTS AND ENSURE PROPER DEPTHS ARE ACHIEVED. THE JURISDICTION UTILITY REQUIREMENTS SHALL ALSO BE
MET, AS WELL AS COORDINATING THE UTILITY TIE-INS/CONNECTIONS PRIOR TO CONNECTING TO THE EXISTING UTILITY/SERVICE. WHERE
CONFLICTS EXIST WITH THESE SITE PLANS, ENGINEER IS TO BE NOTIFIED PRIOR TO CONSTRUCTION TO RESOLVE SAME.
7. WATER SERVICE MATERIALS, BURIAL DEPTH, AND COVER REQUIREMENTS SHALL BE SPECIFIED BY THE LOCAL UTILITY COMPANY.
CONTRACTOR'S PRICE FOR WATER SERVICE SHALL INCLUDE ALL FEES AND APPURTENANCES REQUIRED BY THE UTILITY TO PROVIDE A
COMPLETE WORKING SERVICE.
8. ALL NEW UTILITIES/SERVICES, INCLUDING ELECTRIC, TELEPHONE, CABLE TV, ETC. ARE TO BE INSTALLED UNDERGROUND. ALL NEW
UTILITIES/SERVICES SHALL BE INSTALLED IN ACCORDANCE WITH THE UTILITY/SERVICE PROVIDER INSTALLATION SPECIFICATIONS AND
STANDARDS.
9. SITE GRADING SHALL BE PERFORMED IN ACCORDANCE WITH THESE PLANS AND SPECIFICATIONS AND THE RECOMMENDATIONS SET FORTH
IN THE GEOTECHNICAL REPORT REFERENCED IN THIS PLAN SET AS PREPARED BY ATLANTIC SHORES ENVIRONEMNTAL, LTCD. DATED OCTOBER
24, 2010. THE CONTRACTOR SHALL BE RESPONSIBLE FOR REMOVING AND REPLACING WITH SUITABLE MATERIALS AS SPECIFIED IN THE
GEOTECHNICAL REPORT. ALL EXCAVATED OR FILLED AREAS SHALL BE COMPACTED AS OUTLINED IN THE GEOTECHNICAL REPORT. MOISTURE
CONTENT AT TIME OF PLACEMENT SHALL BE SUBMITTED IN COMPACTION REPORT PREPARED BY A QUALIFIED GEOTECHNICAL ENGINEER,
REGISTERED WITH THE STATE WHERE THE WORK IS PERFORMED, VERIFYING THAT ALL FILLED AREAS AND SUBGRADE AREAS WITHIN THE
BUILDING PAD AREA AND AREAS TO BE PAVED HAVE BEEN COMPACTED IN ACCORDANCE WITH THESE PLANS AND SPECS AND THE
RECOMMENDATIONS SET FORTH IN THE GEOTECHNICAL REPORT. SUBBASE MATERIAL FOR SIDEWALKS, CURB, OR ASPHALT SHALL BE FREE
OF ORGANICS AND OTHER UNSUITABLE MATERIALS. SHOULD SUBBASE BE DEEMED UNSUITABLE BY OWNER OR OWNER'S REPRESENTATIVE,
SUBBASE IS TO BE REMOVED AND FILLED WITH APPROVED FILL MATERIAL COMPACTED AS DIRECTED BY THE GEOTECHNICAL REPORT.
10. ALL FILL, COMPACTION, AND BACKFILL MATERIALS REQUIRED FOR UTILITY INSTALLATION SHALL BE AS PER THE RECOMMENDATIONS
PROVIDED IN THE GEOT=CHNICAL REPORT AND SHALL BE COORDINATED WITH THE APPLICABLE UTILITY COMPANY SPECIFICATIONS.
11. THE CONTRACTOR SHALL COMPLY TO THE FULLEST EXTENT WITH THE LATEST OSHA STANDARDS AND REGULATIONS, OR ANY OTHER
AGENCY HAVING JURISL:3TION FOR EXCAVATION AND TRENCHING PROCEDURES. THE: CONTRACTOR IS RESPONSIBLE FOR UEfERMINING THE
"MEANS AND METHODS" REQUIRED TO MEET THE INTENT AND PERFORMANCE CRITERIA OF OSHA, AS WELL AS ANY OTHER ENTITY THAT HAS
JURISDICTION FOR EXCAVATION AND/OR TRENCHING PROCEDURES.
12. PAVEMENT SHALL BE SAW CUT IN STRAIGHT LINES TO THE FULL DEPTH OF THE EXISTING PAVEMENT. ALL DEBRIS FROM REMOVAL
OPERATIONS SHALL BE REMOVED FROM THE SITE AT THE TIME OF EXCAVATION. STOCKPILING OF DEBRIS WILL NOT BE PERMITTED.
13. THE CONTRACTOR IS RESPONSIBLE FOR VERIFICATION OF EXISTING TOPOGRAPHIC INFORMATION AND UTILITY INVERT ELEVATIONS PRIOR
TO COMMENCEMENT OF ANY CONSTRUCTION. CONTRACTOR TO ENSURE 0.75% MINIMUM SLOPE AGAINST ALL ISLANDS, GUTTERS, AND
CURBS: 1.0% ON ALL CONCRETE SURFACES: AND 1.5% MINIMUM ON ASPHALT, TO PREVENT PONDING. ANY DISCREPANCIES THAT MAY
AFFECT THE PUBLIC SAFETY OR PROJECT COST MUST BE IDENTIFIED TO THE ENGINEER IN WRITING IMMEDIATELY. PROCEEDING WITH
CONSTRUCTION WITHOUT NOTIFICATION IS DONE SO AT THE CONTRACTOR'S OWN RISK.
14. PROPOSED TOP OF CURB ELEVATIONS ARE GENERALLY 6" ABOVE EXISTING LOCAL ASPHALT GRADE UNLESS OTHERWISE NOTED. FIELD
ADJUST TO CREATE A MINIMUM OF 0.75% GUTTER GRADE ALONG CURB FACE EXCEPT AT BUILDING FRONT. ENGINEER TO APPROVE FINAL
CURBING CUT SHEETS PRIOR TO INSTALLATION.
15. IN CASE OF DISCREPANCIES BETWEEN PLANS OR RELATIVE TO OTHER PLANS, THE SITE PLAN WILL TAKE PRECEDENCE. IMMEDIATELY
NOTIFY THE ENGINEER IN WRITING OF ANY CONFLICTS.
16. CONTRACTOR SHALL BE REQUIRED TO SECURE ALL NECESSARY PERMITS AND APPROVALS FOR ALL OFF -SITE MATERIAL SOURCES AND
DISPOSAL FACILITIES. CONTRACTOR SHALL SUPPLY A COPY OF APPROVALS TO ENGINEER AND OWNER PRIOR TO INITIATING WORK.
17. CONTRACTOR SHALL COORDINATE THE INVERT WITH THE FINAL ARCHITECTURAL PLANS
18. PER FIELD INVESTIGATION PERFORMED BY PROACTIVE DEVELOPMENT, LLC AND D&S SURVEY, NO ON -SITE DRAINAGE FACILITIES EXISTING
WITHIN THE PROPERTY BOUNDARIES.
19. THIS PLAN HAS BEEN PREPARED FOR GENERAL DRAINAGE PURPOSES ONLY. FOR GEOMETRIC AND SITE LAYOUT REFER TO PLANS
PREPARED BY OTHERS.
GRAPHIC SCALE
20 0 10 20 40 80
JOINTS IN FILTER FABRIC SHALL BE SPLICED
AT POSTS. USE PLASTIC, WIRE TIES, OR
EQUIVALENT TO ATTACH FABRIC TO POSTS.
NOTE: FILTER FABRIC FENCES SHALL BE
INSTALLED ALONG CONTOUR WHENEVER POSSIBLE
IN FEET
1 inch = 20 ft.
2"x2" BY 14 Ga. WIRE OR
EQUIVALENT, IF STANDARD
STRENGTH FABRIC USED
FILTER FABRIC
FLOW -
--
MINIMUM 8" DOWN x4"�
FORWARD TRENCH
BACKFILL TRENCH WITH
NATIVE SOIL OR 3/4"-1.5-
WASHED GRAVEL & COMPACT
2"x2" STEEL FENCE POSTS
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V.
DATE: 03/01 / 10
SHEET No:
REV. No:
1 OF 1
3
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