SW5200201_Plan (Misc. Detail)_20200413

THESE PLANS AND ASSOCIATED DOCUMENTS ARE THE EXCLUSIVE PROPERTY OF SHIPMAN ENGINEERING, PLLC AND MAY NOT BE REPRODUCED IN WHOLE OR IN PART. THESE DOCUMENTS SHALL NOT BE USED FOR ANY PURPOSEWHATSOEVER, INCLUDING, BUT NOT LIMITED TO, CONSTRUCTION, BIDDING, AND/OR CONSTRUCTION STAKING WITHOUT THE EXPRESS WRITTEN CONSENT OF SHIPMAN ENGINEERING, PLLC.REVISIONSSYMBOLDATE137 MIDDLEGREEN PLACEHOLLY SPRINGS, NC 27540NCBELS LICENSE P-1963DESIGNED BY:WZS
DRAWN BY:WZS
CHECKED BY:WZS
DRAWING DATE:
SE PROJECT #:LEE STREET ATHLETICCOMPLEX IMPROVEMENTSTOWN OF BENSONJOHNSTON COUNTY, NORTH CAROLINASHEET NUMBER:
2019-017SHIPMANENGINEERING 919.900.0006SHIPMAN ENGINEERING, PLLC07-11-19103-12-2020PER NCDEQ EROSION CONTROL COMMENTS204-7-2020PER DWQ STORMWATER COMMENTSD-04 NOTES AND DETAILSFRONT VIEW
SIDE VIEW
8" DOWN AND 4" FORWARD
ALONG TRENCH
8" MINIMUM COVER OVER
SKIRT *
GRADE
FILL SLOPE
SILT FENCE FABRIC
WOVEN WIRE FABRIC
STEEL POST
32" MIN. WIDTHNOTE:
USE SILT FENCE ONLY WHEN DRAINAGE AREA DOES NOT EXCEED 1/4 ACRE AND
NEVER IN AREAS OF CONCENTRATED FLOW.
MINIMUM 10 GAUGE
LINE WIRES
SILT FENCE FABRIC
INSTALLED TO SECOND
WIRE FROM TOP MINIMUM 12-1/2 GAUGE
INTERMEDIATE WIRES
GRADE
3'-0"
2'-0"
24"
8'-0" MAXIMUM
NOTES:
1. L = THE LENGTH OF THE RIPRAP APRON.
2. d = 1.5 TIMES THE MAXIMUM STONE DIAMETER BUT NOT
LESS THAN 6" (INCHES).
3. A FILTER BLANKET OR FILTER FABRIC SHOULD BE
INSTALLED BETWEEN THE RIPRAP AND SOIL FOUNDATION.
4. MAINTAIN ENERGY DISSIPATERS INSTALLED DURING
EARLY SITE WORK THROUGHOUT THE CONSTRUCTION
AREA.
A A
I.D.
3 TIMES I.D. (W2)
PLAN VIEW
SECTION 'A-A'
FILTER
FABRIC
d
L
PIPE
PIPE
MAINTENANCE
INSPECT SEDIMENT FENCES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL.
MAKE ANY REQUIRED REPAIRS IMMEDIATELY.
SHOULD THE FABRIC OF A SEDIMENT FENCE COLLAPSE, TEAR, DECOMPOSE, OR
BECOME INEFFECTIVE, REPLACE IT PROMPTLY.
REMOVE SEDIMENT DEPOSITS WHEN DEPTH OF SEDIMENT REACHES 12" TO
PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN AND TO REDUCE
PRESSURE ON THE FENCE. TAKE CARE TO AVOID UNDERMINING THE FENCE
DURING CLEANOUT.
REMOVE ALL FENCING MATERIALS AND UNSTABLE SEDIMENT DEPOSITS AND
BRING THE AREA TO GRADE AND STABILIZE IT AFTER THE CONTRIBUTING
DRAINAGE AREA HAS BEEN PROPERLY STABILIZED.
MAINTENANCE
RIP RAP SHOULD BE INSPECTED PERIODICALLY FOR
SCOUR OR DISLODGED STONES. CONTROL OF WEED
AND BRUSH GROWTH MAY BE NEEDED IN SOME
LOCATIONS.
W1
PIPE OUTLET TO FLAT AREA (NCDENR 6.15)-NO WELL DEFINED CHANNEL
NOT TO SCALE
SILT FENCE (NCDENR 6.62)
NOT TO SCALE
PERMANENT SEEDING
PREPARE SEEDBED BY RIPPING, CHISELING, HARROWING, OR PLOWING TO DEPTH OF 6 INCHES SO AS TO PRODUCE A LOOSE, FRIABLE
SOIL SURFACE. REMOVE ALL STONES, ROCKS, BOULDERS, STUMPS, OR OTHER DEBRIS FROM THE SURFACE WHICH WILL PREVENT
GERMINATION OR PLANT GROWTH.
INCORPORATE INTO THE SOIL 800-1000 LBS OF 10-10-10 FERTILIZER PLUS 500 LBS OF 20% SUPERPHOSPHATE PER ACRE AND TWO TONS
OF DOLOMITIC LIME PER ACRE UNLESS SOIL TESTING INDICATES THAT A LOWER RATE OF LIME MAY BE USED.
MULCH AFTER SEEDING WITH 2 TONS OF GRAIN STRAW PER ACRE AND EITHER CRIMP STRAW INTO SOIL OR TACK WITH LIQUID ASPHALT
AT 400 GALLONS PER ACRE OR EMULSIFIED ASPHALT AT 300 GALLONS PER ACRE. IF DISC BLADE/CRIMPING IS USED, APPLY 1/2 OF THE
MULCH, THEN CRIMP, AND FINISH BY APPLYING THE OTHER 1/2 OF MULCH.
PERMANENT SEEDINGS:
PLANTS AND MIXTURE:PLANTING RATE/ACRE:PLANTING DATES:
TALL FESCUE 110 LBS/ACRE AUGUST 15- OCTOBER 15
FEBRUARY 15- MAY 1JAPANESE CLOVER
CHINESE LESPEDEZA
(LOW MAINTENANCE SLOPE
3:1 OR LESS)
TALL FESCUE 140 LBS/ACRE AUGUST 15- OCTOBER 15
FEBRUARY 15- MAY 1JAPANESE CLOVER
CHINESE LESPEDEZA
(LOW MAINTENANCE SLOPE
3:1 OR LESS)
BLEND OF TWO TURFTYPE TALL
FESCUES (90%) AND TWO OF MORE
IMPROVED KENTUCKY BLUEGRASS
VARIETIES (10%) (GENERAL LAWN
AREAS)
200 LBS/ACRE AUGUST 15- OCTOBER 15
FEBRUARY 15- MAY 1
NOTE: FOR SPRING SEEDINGS, USE SCARIFIED LESPEDEZA SEED. FOR LATE FALL AND WINTER SEEDINGS, USE UNSCARIFIED SEED.
TEMPORARY SEEDING (PIEDMONT REGION)-LATE WINTER/EARLY SPRING
SEEDING MIXTURE:
SPECIES:RATE (LB/ACRE)
RYE (GRAIN)120
ANNUAL LESPEDEZA (KOBE IN
PIEDMONT & COASTAL PLAIN,
KOREAN IN MOUNTAINS)
50
SEEDING DATES:
MOUNTAINS: ABOVE 2500 FEET- FEBRUARY 15- MAY 15
BELOW 2500 FEET- FEBRUARY 1- MAY 1
PIEDMONT: JANUARY 1- MAY 1
COASTAL PLAIN: DECEMBER 1- APRIL 15
SOIL AMENDMENTS: FOLLOW RECOMMENDATIONS OF SOIL TESTS OR APPLY 2,000 LBS/ACRE OF GROUND AGRICULTURAL LIMESTONE
AND 750 LBS/ACRE OF 10-10-10 FERTILIZER.
MULCH: APPLY 4,000 LBS/ACRE OF STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, OR A MULCH ANCHORING TOOL. A
DISK SET NEARLY STRAIGHT CAN BE USED AS A MULCH ANCHORING TOOL.
MAINTENANCE: REFERTILIZE IF GROWTH IS NOT FULLY ADEQUATE. RESEED, REFERTILIZE, AND MULCH IMMEDIATELY FOLLOWING
EROSION OR OTHER DAMAGE.
TEMPORARY SEEDING (PIEDMONT REGION)-FALL
SEEDING MIXTURE:
SPECIES:RATE (LB/ACRE)
RYE (GRAIN)120
SEEDING DATES:
MOUNTAINS: AUGUST 15- DECEMBER 15
COASTAL PLAIN & PIEDMONT: AUGUST 15-
DECEMBER 30
SOIL AMENDMENTS: FOLLOW RECOMMENDATIONS OF SOIL TESTS OR APPLY 2,000 LBS/ACRE OF GROUND AGRICULTURAL LIMESTONE
AND 1,000 LBS/ACRE OF 10-10-10 FERTILIZER.
MULCH: APPLY 4,000 LBS/ACRE OF STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, OR A MULCH ANCHORING TOOL. A
DISK SET NEARLY STRAIGHT CAN BE USED AS A MULCH ANCHORING TOOL.
MAINTENANCE: REPAIR AND REFERTILIZE DAMAGED AREAS IMMEDIATELY. TOPDRESS WITH 50 LBS/ACRE OF NITROGEN IN MARCH. IF IT
IS NECESSARY TO EXTEND TEMPORARY COVER BEYOND JUNE 15, OVERSEED WITH 50 LBS/ACRE KOBE (PIEDMOND AND COASTAL PLAIN)
OR KOREAN (MOUNTAIN) LESPEDEZA IN LATE FEBRUARY OR EARLY MARCH.
TEMPORARY SEEDING (PIEDMONT REGION)-SUMMER
SEEDING MIXTURE:
SPECIES:RATE (LB/ACRE)
GERMAN MILLET 40
SEEDING DATES:
MOUNTAINS: MAY 15- AUGUST 15
PIEDMONT: MAY 1- AUGUST 15
COASTAL PLAIN: APRIL 15- AUGUST 15
SOIL AMENDMENTS: FOLLOW RECOMMENDATIONS OF SOIL TESTS OR APPLY 2,000 LBS/ACRE OF GROUND AGRICULTURAL LIMESTONE
AND 750 LBS/ACRE OF 10-10-10 FERTILIZER.
MULCH: APPLY 4,000 LBS/ACRE OF STRAW. ANCHOR STRAW BY TACKING WITH ASPHALT, NETTING, OR A MULCH ANCHORING TOOL. A
DISK SET NEARLY STRAIGHT CAN BE USED AS A MULCH ANCHORING TOOL.
MAINTENANCE: REFERTILIZE IF GROWTH IS NOT FULLY ADEQUATE. RESEED, REFERTILIZE, AND MULCH IMMEDIATELY FOLLOWING
EROSION OR OTHER DAMAGE.
IN PIEDMONT AND MOUNTAINS, A SMALL-STEMMED SUDANGRASS MAY BE
SUBSTITUTED AT A RATE OF 50 LBS/ACRE.
#57 WASHED STONE PLACED TO A HEIGHT OF 16"-18" MINIMUM
ABOVE THE TOP OF BOX
GALVANIZED HARDWARE WIRE EXTENDS
TO THE TOP OF THE BOX
STANDARD METAL POSTS 2'-0" IN GROUND
MAINTENANCE:
INSPECT INLETS AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT (1
2
INCH OR GREATER) RAINFALL EVENT. CLEAR THE MESH WIRE OF ANY
DEBRIS OR OTHER OBJECTS TO PROVIDE ADEQUATE FLOW FOR
SUBSEQUENT RAINS. TAKE CARE NOT TO DAMAGE OR UNDERCUT
THE WIRE MESH DURING SEDIMENT REMOVAL. REPLACE STONE AS
NEEDED.
3' FILTER FABRIC
ON GROUND
STEEL FENCE POST
WIRE FENCE
HARDWARE CLOTH
FILTER OF #57
WASHED STONE
BURY 6" OF UPPER EDGE OF
FILTER FABRIC IN TRENCH
BURY WIRE FENCE AND
HARDWARE CLOTH
TOP OF SILT FENCE
MUST BE AT LEAST 1'
ABOVE THE TOP OF
THE WASHED STONE
SILT FENCE
FRONT VIEW
SECTION VIEW
STEEL FENCE
POST SET MAX
2' APART MIN. 18"
INTO SOLID GROUND
BURY WIRE FENCE,
FILTER FABRIC,
AND HARDWARE
CLOTH IN TRENCH
4' MIN.
MAINTENANCE:
1.INSPECT SILT FENCE OUTLET AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT RAINFALL EVENT (1
2" OR
GREATER). REPAIR ANY DAMAGE TO THE OUTLET IMMEDIATELY.
2.REMOVE SEDIMENT FROM BEHIND THE OUTLET WHEN HALF OF STONE OUTLET IS COVERED.
3.REPLACE STONE AS NEEDED TO ENSURE PROPER DEWATERING.
4.PERIODICALLY CHECK THE STRUCTURE FOR DAMAGE. ANY STONE DISPLACED FROM BEHIND THE
HARDWARE CLOTH SHALL BE REPLACED IMMEDIATELY.
18"
SILT FENCE OUTLET (NCDENR 6.62)
NOT TO SCALE
HARDWARE CLOTH & GRAVEL INLET PROTECTION
NOT TO SCALE
TOP ELEVATION OF STORMWATER
FRONT VIEW
EXISTING SLOPE
SIDE VIEW
11 MAX.
STEP SEQUENCE
EXISTING S
L
O
P
E
WEIR
NOTE:
1.HEIGHT & WIDTH DETERMINED BY
EXISTING TOPOGRAPHY AND
SEDIMENT STORAGE REQUIRED.
2.KEY RIP RAP INTO THE DAM FOR
STABILIZATION.
#57 WASHED STONE
FILTER FABRIC
CLASS 1 RIP-RAP
VARIES
VARIES
6"-1'
EXISTING SLOPES
KEYED RIP RAP
#57 WASHED STONE
VARIES
6"-1'
VARIES
DESIGN OF SPILLWAYS
DRAINAGE
AREA (AC)
MIN. WEIR
LENGTH (FT)
1 4
2 6
3 8
4 10
5 12
CHECK DAM
NOT TO SCALE
PIPE
CLASS B RIP-RAPNCDOT #5 OR #57 STONE
1' THICK x 2' HIGH
(MINIMUM)
FLOW
FLOW
SEDIMENT STORAGE AREA
PERSPECTIVE VIEW
PIPE
FINISHED
GRADECLASS B RIP-RAP
1.5'
MAX SEDIMENT DEPTH
(CLEAN OUT POINT)
SEDIMENT STORAGE ZONE
FLOOD STORAGE ZONE
NCDOT #5 OR #57 STONE
FLO
W
2'
1'3'
CONSTRUCTION SPECIFICATIONS:
1.CLEAR THE AREA OF ALL DEBRIS THAT MIGHT HINDER EXCAVATION AND DISPOSAL OF SPOIL.
2.INSTALL THE CLASS B OR CLASS I RIPRAP IN A SEMI-CIRCLE AROUND THE PIPE INLET. THE STONE
SHOULD BE BUILT UP HIGHER ON EACH END WHERE IT TIES INTO THE EMBANKMENT. THE MINIMUM
CREST WIDTH OF THE RIP-RAP SHOULD BE 3 FEET, WITH A MINIMUM BOTTOM WIDTH OF 11 FEET.
THE MINIMUM HEIGHT SHOULD BE 2 FEET, BUT ALSO 1 FOOT LOWER THAN THE SHOULDER OF THE
EMBANKMENT OR DIVERSIONS.
3.A 1 FOOT THICK LAYER OF NC DOT #5 OR #57 STONE SHOULD BE PLACED ON THE OUTSIDE SLOPE
OF THE RIPRAP.
4.THE SEDIMENT STORAGE AREA SHOULD BE EXCAVATED AROUND THE OUTSIDE OF THE STONE
HORSESHOE 18 INCHES BELOW NATURAL GRADE.
5.WHEN THE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED, FILL DEPRESSION AND
ESTABLISH FINAL GRADING ELEVATIONS, COMPACT AREA PROPERLY, AND STABILIZE WITH
GROUND COVER.
MAINTENANCE:
INSPECT ROCK PIPE INLET PROTECTION AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT (1/2" OR
GREATER) RAINFALL EVENT AND REPAIR IMMEDIATELY. REMOVE SEDIMENT AND RESTORE THE
SEDIMENT STORAGE AREA TO ITS ORIGINAL DIMENSIONS WHEN THE SEDIMENT HAS ACCUMULATED TO
ONE-HALF THE DESIGN DEPTH OF THE TRAP. PLACE THE SEDIMENT THAT IS REMOVED IN THE
DESIGNATED AREA AND REPLACE THE CONTAMINATED PART OF THE GRAVEL FACING.
CHECK THE STRUCTURE FOR DAMAGE. ANY RIPRAP DISPLACED FROM THE STONE HORSESHOE MUST BE
REPLACED IMMEDIATELY.
AFTER ALL THE SEDIMENT AREAS HAVE BEEN PERMANENTLY STABILIZED, REMOVE THE STRUCTURE
AND ALL THE UNSTABLE SEDIMENT. SMOOTH THE AREA TO BLEND WITH THE ADJOINING AREAS AND
PROVIDE PERMANENT GROUND COVER (SURFACE STABILIZATION).
RIP-RAP HEAD WALL, 1' MIN
HEIGHT FROM ROAD
SHOULDER
RIP RAP FILTER DAM INLET PROTECTION (NCDENR 6.55)
NOT TO SCALE
MAINTENANCE:
INSPECT CHECK DAMS AND CHANNELS AT LEAST WEEKLY AND
AFTER EACH SIGNIFICANT (1
2" OR GREATER) RAINFALL EVENT.
REPAIR DAMAGE IMMEDIATELY. CLEAN OUT SEDIMENT,
STRAW, LIMBS, OR OTHER DEBRIS THAT COULD CLOG THE
CHANNEL WHEN NEEDED.
ANTICIPATE SUBMERGENCE AND DEPOSITION ABOVE THE
CHECK DAM AND EROSION FROM HIGH FLOWS AROUND THE
EDGES OF THE DAM. CORRECT ALL DRAINAGE IMMEDIATELY.
IF SIGNIFICANT EROSION OCCURS BETWEEN DAMS,
ADDITIONAL MEASURES CAN BE TAKEN SUCH AS INSTALLING A
PROTECTIVE RIPRAP LINER IN THAT PORTION OF THE
CHANNEL.
REMOVE SEDIMENT ACCUMULATED BEHIND THE DAMS AS
NEEDED TO PREVENT DAMAGE TO CHANNEL VEGETATION ,
ALLOW THE CHANNEL TO DRAIN THROUGH THE STONE CHECK
DAM, AND PREVENT LARGE FLOWS FROM CARRYING
SEDIMENT OVER THE DAM. ADD STONES TO DAMS AS NEEDED
TO MAINTAIN DESIGN HEIGHT AND CROSS SECTION.