c17008.00-base c500-ec€¦ · 1st submittal tmb lml 2017.08.10 submittal: drawn by: checked by:...

SEALED BY:

1149 EXECUTIVE CIRCLE

CARY, NC 27511

P:919.576.9733

1st SUBMITTAL TMB LML 2017.08.10

SUBMITTAL: DRAWN BY: CHECKED BY: DATE:

NCBELS # C-3847

2nd SUBMITTAL TMB LML 2017.11.09

3rd SUBMITTAL TMB LML 2018.01.11 PARK STATION

CARY, NC

4th SUBMITTAL TMB LML 2018.03.22

5th SUBMITTAL TMB LML 2018.05.10

EROSION CONTROL PLAN C-500

PROPOSED LIMITS OF DISTURBANCE

PROPOSED CONTOUR (MAJOR)

PROPOSED CONTOUR (MINOR)

PROPOSED INLET PROTECTION

EX. CONTOUR (MAJOR)

EX. CONTOUR (MINOR)

PROPOSED SILT FENCE

XXX

PROPOSED CONSTRUCTION ENTRANCE

PROPOSED TREE PROTECTION FENCE

XXX

PROPOSED SILT FENCE OUTLET

PROPOSED DIVERSION DITCH/BERM

PROPOSED ROCK FILTER DAM

EROSION CONTROL NOTES1. REFER TO GENERAL NOTES SHEET C100.

2. A PRE-CONSTRUCTION MEETING IS REQUIRED FOR THIS PROJECT.

3. EROSION CONTROL MEASURES SHALL BE MAINTAINED DURING THE ENTIRE LIFE OF THE PROJECT.

4. CONTRACTOR SHALL CONDUCT GRADING OPERATIONS IN A MANNER THAT ENSURES NO SEDIMENT IS ALLOWED OFF-SITE. IT IS THE

CONTRACTOR'S SOLE RESPONSIBILITY TO ENSURE THAT NO SEDIMENT IS ALLOWED OFF-SITE. IF ADDITIONAL MEASURES ARE REQUIRED, THE

CONTRACTOR SHALL NOTIFY THE ENGINEER IMMEDIATELY TO DISCUSS DESIGN MODIFICATIONS.

5. ALL STREETS ADJACENT TO AND IN FRONT OF THE PROJECT SHALL BE KEPT CLEAN AT ALL TIMES OR A WASH STATION MAY BE REQUIRED AT THE

CONTRACTOR'S EXPENSE.

6. CONTRACTOR SHALL CONSTRUCT DIVERSION DITCHES AND BERMS TO ENSURE ALL RUN-OFF IS DIRECTED TO AN EROSION CONTROL MEASURE.

DIVERSIONS SHALL STAY IN PLACE AT LEAST UNTIL PIPE DRAINAGE SYSTEM IS COMPLETED.

7. GROUND COVER SHALL BE ESTABLISHED PER UPDATED NPDES REQUIREMENTS. REFER TO DETAIL THIS SHEET STABILIZATION TIME FRAMES.

8. CUT AND FILL SLOPES THAT ARE TWO TO ONE (2:1) OR GREATER SHALL BE STABILIZED WITH PERMANENT SLOPE RETENTION DEVICES OR A

SUITABLE COMBINATION OR PLANTINGS AND RETENTION DEVICES. SLOPES GREATER THAN THREE TO ONE (3:1) SHALL NOT BE STABILIZED WITH

TURF GRASS BUT MUST BE STABILIZED WITH VEGETATION THAT REQUIRES MINIMAL MAINTENANCE SUCH AS WEEPING LOVE GRASS, RED FESCUE

OR OTHER APPROVED VARIETY.

9. THE TREE PROTECTION FENCE SHALL BE MAINTAINED ON THE SITE UNTIL ALL SITE WORK IS COMPLETED AND THE FINAL SITE INSPECTION IS

SCHEDULED PRIOR TO THE ISSUANCE OF A CERTIFICATE OF OCCUPANCY (CO). THE FENCING SHALL BE REMOVED IMMEDIATELY PRIOR TO THE

FINAL SITE INSPECTION FOR THE SITE.

10. TREE PROTECTION FENCING SHALL NOT BE MOVED AND THERE SHALL BE NO ENCROACHMENT INTO SUCH PROTECTED AREA(S) WITHOUT

WRITTEN AUTHORIZATION OF THE TOWN’S ZONING COMPLIANCE STAFF. ANY ACTIVITY (LANDSCAPING, FENCING, OR UTILITY INSTALLATION)

SHOWN ON THE APPROVED PLANS IN A TREE PROTECTION AREA, SHALL ALSO NOT OCCUR WITHOUT WRITTEN AUTHORIZATION FROM THE

TOWN’S ZONING COMPLIANCE STAFF. ANY UNAUTHORIZED ENCROACHMENT OR DISTURBANCE WITHIN THE BOUNDARIES OF A TREE

PROTECTION AREA SHALL AUTOMATICALLY RESULT IN FINES AND THE REPLACEMENT OF ANY DAMAGED VEGETATION IN ACCORDANCE WITH

THE LAND DEVELOPMENT ORDINANCE.

11. ALL CATCH BASINS SHALL BE PROTECTED PER TOC DETAIL 04000.014, UNLESS NOTED OTHERWISE.

12. TOPSOIL SHALL BE STRIPPED AND STOCKPILED AND MAY BE PLACED IN NON STRUCTURAL FILL AREAS.

13. PERMANENT GOUNDCOVER SHALL BE ESTABLISHED WITHIN 15 WORKING DAYS OR 90 CALENDAR DAYS, WHICHEVER IS SHORTER.

14. CONSTRUCTION ENTRANCES MUST BE MODIFIED TO ACHIEVE ADA COMPLIANCE WHERE APPLICABLE.

15. CONTRACTOR SHALL CONSTRUCT DIVERSION BERM OUTSIDE OF THE RIGHT OF WAY ALONG E PARK STREET TO ENSURE THAT ALL RUNOFF

DURING THE GRADING PHASE IS KEPT ON SITE. AS THE SITE IS BROUGHT TO GRADE AND THE STORM STRUCTURES ARE INSTALLED, THE DIVERSION

MAY BE MODIFIED/REMOVED AS INSTRUCTED BY THE EROSION CONTROL INSPECTOR.

16. A GRADING PERMIT SHALL NOT BE ISSUED FOR THIS PROJECT UNTIL THE FOLLOWING HAS OCCURED:

A. THE RISER STRUCTURES AND BARRELS MUST BE DELIVERED AND ON SITE.

B. THE TREE PROTECTION FENCING ON THIS PROJECT MUST BE INSTALLED AND INSPECTED.

C. THE TOWN OF CARY HAS RECEIVED NOTIFICATION FROM THE ECOSYSTEM ENHANCEMENT PROGRAM OR AN APPROVED NUTRIENT OFFSET

BANK THAT A RECEIPT HAS BEEN ISSUED TO THE DEVELOPER AND THE LOCAL GOVERNMENT STATING THE NITROGEN BUY DOWN HAS BEEN

COMPLETED.

SEEDBED PREPARATION

SEEDING SCHEDULE

MAR 1. - JUN. 1

AND MAR 1. - APR. 15

OR MAR. 1 - JUN. 30

JUN. 1 - SEP. 1

SEP. 1 - MAR. 1

NOV. 1 - MAR. 1

1. CHISEL COMPACTED AREAS AND SPREAD TOPSOIL 3 INCHES DEEP OVER ADVERSE SOIL CONDITIONS, IF THEY

OCCUR. AFTER ALL ROUGH GRADING IS COMPLETED, TILL SOIL AREAS TO BE SEEDED AND PLANTED TO A DEPTH

OF FIVE INCHES.

2. REMOVE ALL LOOSE ROCKS, ROOTS, DIRT CLODS, AND OTHER OBSTRUCTIONS LEAVING GROUND SURFACE

SMOOTH AND UNIFORM.

3. TO PREPARE UNIFORM SEEDBED, INCORPORATE AGRICULTURAL LIME FERTILIZER AND SUPERPHOSPHATE INTO

SOIL AREAS TO BE VEGETATED. DISK NUTRIENTS INTO SOIL UNTIL WELL PULVERIZED.

4. SEED ON PREPARED SEEDBED AND COVER LIGHTLY WITH SEEDING EQUIPMENT OR CULTIPACK. APPLY

TEMPORARY SEEDING TO SOIL STOCKPILE AREAS THAT WILL BE DISTURBED WITHIN 30 DAYS. APPLY PERMANENT

SEEDING TO WHERE FINISH GRADES ARE ESTABLISHED.

5. MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR WITH LIQUID ASPHALT AT 400 GAL./ACRE OR EMULSIFIED

ASPHALT AT 300 GAL./ACRE.

6. MULCH ALL SEEDED AREAS WITH SMALL GRAIN STRAW AT 90 LBS./1000 SF AND SPREAD UNIFORMLY. GROUND

SURFACE SHOULD BE VISIBLE TO ALLOW SUNLIGHT PENETRATION.

7. MULCH AROUND SHRUBBERY AND TREES WITH SHREDDED HARDWOOD TO A DEPTH OF 3 INCHES.

8. AFTER WORK IS COMPLETED AND AREAS ARE STABILIZED, CALL EROSION CONTROL OFFICER FOR SITE

INSPECTION AND RECEIVE CERTIFICATE OF COMPLETION. REMOVE ALL TERMPORARY EROSION CONTROL

MEASURES, INSTALL RIP-RAP, AND SEED AND MULCH ANY REMAINING BARE AREAS.

SHOULDERS, SIDE DITCHES, SLOPES (MAX. 3:1)

DATE

AUG. 15 - NOV. 1 TALL FESCUE

TYPE

300 LBS/ACRE

PLANTING RATE

NOV. 1 - MAR. 1

MAR 1. - APR. 15

JUL. 1 - AUG. 15

TALL FESCUE

ABRUZZI RYE

TALL FESCUE

TALL FESCUE AND

***BROWNTOP MILLET OR

SOUGHNUM-SUDAN HYBRID

SHOULDERS, SIDE DITCHES, SLOPES (3:1 TO 2:1)

PLANTING RATEDATE TYPE

SERICEA LESPEDESA

ADD TALL FESCUE

ADD WEEPING LOVEGRASS

***TALL FESCUE AND

***BROWNTOP MILLET OR

ERICEA LESEDESCA AND

ADD ABRUZZI RYE.

SOUGHNUM-SUDAN HYBRID

TALL FESCUE

300 LBS/ACRE

25 LBS/ACRE

300 LBS/ACRE

125 LBS/ACRE

35 LBS/ACRE

30 LBS/ACRE

50 LBS/ACRE

120 LBS/ACRE

10 LBS/ACRE

120 LBS/ACRE

25 LBS/ACRE

30 LBS/ACRE

70 LBS/ACRE

120 LBS/ACRE

25 LBS/ACRE

CONSULT EROSION CONTROL ENGINEER OR SOIL CONSERVATION SERVICES

FOR OTHER ALTERNATIVES FOR VEGETATION OF DENUDED AREAS. THE ABOVE

VEGETATION RATES ARE THOSE WHICH DO WELL UNDER LOCAL CONDITIONS.

OTHER SEEDING RATE COMBINATIONS ARE POSSIBLE.

***TEMPORARY - RESEED ACCORDING TO OPTIMUM SEASON FOR DESIRED

PERMANENT VEGETATION. DO NOT ALLOW TEMPORARY COVER TO GROWN

OVER 12-INCHES IN HEIGHT BEFORE MOWING. OTHERWISE FESCUE MAY BE

SHADED OUT.

PERIMETER DIKES, SWALES, DITCHES, SLOPES 7 DAYS NONE

SITE AREA DESCRIPTION STABILIZATION TIMEFRAME EXCEPTIONS

HIGH QUALITY WATER(HQW) ZONES 7 DAYS NONE

SLOPES STEEPER THAN 3:1 7 DAYS

SLOPES 3:1 OR FLATTER 14 DAYS

ALL OTHER AREAS WITH SLOPES FLATTER THAN 4:1 14 DAYS

IF SLOPES ARE 10' OR LESS IN LENGTH AND ARE

NOT STEEPER THAN 2:1, 14 DAYS ARE ALLOWED.

7 DAYS FOR SLOPES GREATER THAN 50' IN LENGTH.

NONE, EXCEPT FOR PERIMETERS AND HQW ZONES.

STABILIZATION TIME FRAMES

1. REQUEST PRE-CONSTRUCTION MEETING;

2. OBTAIN GRADING PERMIT. TREE PROTECTION FENCING MUST BE INSTALLED AND INSPECTED BY THE TOWN OF CARY SITE INSPECTOR PRIOR TO

A GRADING PERMIT BEING ISSUED;

3. INSTALL ALL EROSION CONTROL MEASURES AS SHOWN WITH SILT FENCE INSTALLED BEHIND EXISTING SIDEWALK;

4. OBTAIN CERTIFICATE OF COMPLIANCE THROUGH ON-SITE INSPECTION BY EROSION CONTROL OFFICER;

5. PROCEED WITH GRADING;

6. CONSTRUCT NEW SUBDIVISION IMPROVEMENTS;

7. CLEAN SEDIMENT BASIN WHEN ONE-HALF FULL;

8. SEED AND MULCH DENUDED AREA PER NCDWQ STABILIZATION REQUIREMENTS (SEE TABLE THIS SHEET);

9. MAINTAIN SOIL EROSION CONTROL MEASURES UNTIL PERMANENT GROUND COVER IS ESTABLISHED. DIVERSIONS SHALL REMAIN IN PLACE UNTIL

THE STORM DRAINAGE SYSTEM IS INSTALLED, FUNCTIONAL, AND DISCHARGING ALL STORMWATER TO BASINS;

10. REMOVE AND RELOCATE SILT FENCE TO BEHIND PROPOSED SIDEWALK ALONG E PARK STREET TO ALLOW FOR INSTALLATION OF NEW

SIDEWALK AND CURBING IN THE RIGHT OF WAY. MAINTAIN INLET PROTECTION MEASURES WITHIN THE RIGHT OF WAY.

11. REQUEST FINAL APPROVAL BY EROSION CONTROL OFFICER;

12. REMOVE SOIL EROSION CONTROL MEASURES AND STABILIZE THESE AREAS.

CONSTRUCTION SEQUENCE

Filter

Basin

Drainage

Area

(Ac.) Q10 (cfs) SKIMMER SIZE ORIFICE SIZE

DEPTH LENGTH WIDTH PROP. REQ'D PROP. REQ'D PROP. REQ'D

(FT) (FT) (FT) (CF) (CF) (SF) (SF) (FT.) (FT.)

SB #1 0.95 2.7436 3 150 60 3435 1724 1800 1195 10 2.59 1.5" 1.5"

NOTES: 10

"-I10 7.22 IN/HR

-C 0.40

-REQUIRED SURFACE AREA BASED ON .01 * Q10 * 43,560 SF/AC

-REQUIRED VOLUME BASED ON 1815 CF/ ACRE OF DRAINAGE AREA

-VOLUMES SHOWN ARE FOR SEDIMENT STORAGE ZONE FLOOD STORAGE ZONE IS ONE FOOT ABOVE SEDIMENT STORAGE ZONE.

-EROSION CONTROL INSPECTOR CAN REQUIRE ADDITIONAL EROSION CONTROL MEASURES AS NECESSARY.

SB IS TOC STD. 04000.03

WEIRBASIN DIMENSIONS VOLUME AREA

SEDIMENT BASIN SUMMARY

GRAPHIC SCALE

NORTH

ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH TOWN OF CARY

STANDARDS, SPECIFICATIONS AND DETAILS IN PLACE AT TIME OF PLAN

APPROVAL

PROPOSED LIMITS OF PROPERTY LINE =

DISTURBANCE

TREE PROTECTION FENCE@ 1.0' FROM LOD

SILT FENCE@ 1.0' FROM TP FENCE

LOD / TP FENCE / SILT FENCE TYPICAL DETAIL

TOTAL SITE AREA = 2.06 ACRES

TOTAL ON-SITE DISTURBANCE = 2.06 ACRES

TOTAL OFF-SITE DISTURBANCE = 0.35 ACRES

TOTAL DISTURBANCE = 2.41 ACRES

)

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(38.5' PROPOSED R/W)

APPROVED by the Town of CaryDevelopment Review Committee

07/23/2018By: dlovelan

18-DP-0132