20191209 Ver 2_Typical-Details_20191122

6-INCH CURB OR
HIGHER TO CONTAIN
SEDIMENT OR DEBRIS
TRENCH
TOP OF BANK
A
STREAM
FLOW
TOP OF BANK
SILT FENCE
BRIDGE APPROACH TO BE
ADEQUATELY STABILIZED
DECK WIDTH FOR
WIDEST EQUIPMENT
PT.AN VTFW
IN THE EVENT OF A CONFLICT BETWEEN THESE DRAWINGS AND THOSE OF THE
APPROVED E&SC PLAN, THOSE DRAWINGS APPROVED BY NCDEQ SHALL APPLY.
TEMPORARY BRIDGE NOTES: I S 0
THE FOLLOWING IS A SEQUENCE OF CONSTRUCTION AND MIGRATION MEASURES TO BE FOLLOWED AT ALL TEMPORARY
_
UNDERSIDE OF BRIDGE DECK MUST BE
BRIDGE CROSSINGS.
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WRAPPED WITH GEOTEXTILE FABRIC TO
1. A PRE -FABRICATED BRIDGE OR FLATBED RAILCAR, FLEXI-FLOAT OR FLUMED VEHICLE CROSSING MAY BE
PREVENT SEDIMENT OR DEBRIS FROM
SUBSTITUTED FOR THE TEMPORARY BRIDGE.
PUSHING THROUGH THE CRACKS
BETWEEN DECK TIMBERS.
2. INSTALL THE BRIDGE IN A MANNER THAT WILL MINIMIZE SEDIMENT ENTERING THE WATER. STRINGERS MUST BE
DESIGNED TO SUPPORT THE LOADS EXPECTED ON THE BRIDGE. CURBS AT LEAST 6-INCH HIGH MUST BE INSTALLED
STEEL OR LOG STRINGER
ALONG THE EDGE OF THE DECK TO CONTAIN SEDIMENT AND DEBRIS ON THE BRIDGE. FASTENERS CONNECTING
TO BE DESIGNED BY AN
COMPONENTS MUST BE STRONG ENOUGH TO HOLD THEM IN POSITION DURING THE LIFE OF THE BRIDGE.
ENGINEER TO SUPPORT
TEMPORARY CRIB ABUTMENTS MAY BE FILLED WITH ROCK OR COBBLE, OR MAY BE SOLID TIMBER ROTATED 90
DEGREES IN ALTERNATIVE LAYERS. RIP -RAP EROSION PROTECTION IS TO BE PLACED AROUND THE CRIBS AND ON
EXPECTED LOADS
ANY FILL SLOPES PROJECTING INTO THE WATER, IF SPECIFICALLY AUTHORIZED BY PERMIT.
3. ROAD APPROACHES LEADING TO THE BRIDGE MUST BE RAISED AND STABLE SO EQUIPMENT LOADS ARE SUPPORTED
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A SUFFICIENT DISTANCE BACK FROM THE WATER TO REDUCE POTENTIAL SEDIMENT AND DEBRIS ENTERING THE
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STREAM FROM EQUIPMENT TRACKS. DO NOT USE SOIL TO CONSTRUCT OR STABILIZE EQUIPMENT BRIDGES. IF CUTS
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TEMPORARY BRIDGE
SLOPES. EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE INSTALLED TO KEEP SEDIMENT ON LAND (E.G.,
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SILT FENCING, FILTER CLOTH, RIP -RAP, SEED AND MULCH, ETC.).
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4. PERIODICALLY CHECK BRIDGE INSTALLATION AND REMOVE ANY BUILT-UP SEDIMENT OR DEBRIS ON THE BRIDGE.
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5. BRIDGES SHOULD BE SECURELY ANCHORED AT ONE END USING STEEL CABLE OR CHAIN TO PREVENT THE BRIDGE
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FROM FLOATING DOWNSTREAM AND POSSIBLY CAUSING AN OBSTRUCTION TO THE FLOW. ANCHORING AT ONLY
ONE END WILL PREVENT CHANNEL OBSTRUCTION IN THE EVENT THAT FLOOD WATERS FLOAT THE BRIDGE.
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ACCEPTABLE ANCHORS ARE LARGE TREES, BOULDERS, OR DRIVEN STEEL ANCHORS.
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6. TEMPORARY CRIB ABUTMENTS SHOULD BE PLACED PARALLEL TO, AND ON, STABLE BANKS SUCH THAT THE
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BRIDGE LENGTH (40-FEET MAX)
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GRAVEL FILL
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STEEL OR LOG STRINGER
TEMPORARY CRIB
TEMPORARY CRIB -
ABUTMENT SET BACK MIN.
ABUTMENT
6.5-FEET FROM TOP OF BANK
� USE CORDUROY OR OTHER
SUITABLE MATERIAL TO
RIPRAP TOE PROTECTION
NTS
FORM STABLE APPROACH
(IF NECESSARY) ENSURE ADEQUATE OPENING TO
ROADS WHERE NECESSARY
UNDISTURBED STREAM BANK ALLOW ANTICIPATED INCREASE IN
09/25/2019
BRIDGE PROFILE STREAM DISCHARGE
ORDINARY HIGH WATER MARK
- NON -WOVEN GEOTEXTILE (TYP.)
(OHWM)
7335-19-023
Piedmont
TYPICAL TEMPORARY BRIDGE DETAIL r6lil
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Natural Gas
NOT TO SCALE

20-FEET MIN.
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SILT FENCE 10-FEET
(INSTALL SECOND ROW OF SILT MIN.
FENCE 2 FEET LANDWARD OF
SINGLE ROW AS NEEDED BASED
ON CONDITIONS IN THE FIELD)
20-FEET MIN. � I
STREAM
FLOW
PRE -CONSTRUCTION
PRE -CONSTRUCTION STREAM CROSSING NOTES:
1. LIMIT DISTURBANCE WIDTH TO 50-FEET OR LESS AT STREAM CROSSINGS WITHIN 50-FOOT
WIDE EXISTING OR PROPOSED EASEMENT OR AS OTHERWISE INDICATED ON PLAN VIEW
DRAWINGS.
2. REFER TO APPLICABLE REQUIREMENTS OF LOCAL, STATE, AND FEDERAL PERMITS.
3. PROJECT SHALL BE CONSTRUCTED AND MAINTAINED IN STRICT ACCORDANCE WITH ALL
GENERAL, REGIONAL AND SPECIFIC CONDITIONS OF NATIONWIDE PERMIT 12. A COPY OF
THESE PERMIT CONDITIONS SHALL BE MAINTAINED ON -SITE AT ALL TIMES.
4. INSTALL SILT FENCE PERPENDICULAR TO THE CONSTRUCTION EASEMENT AT STREAM
CROSSINGS. EXTEND SILT FENCE 20-FEET MINIMUM ON BOTH SIDES OF EDGE OF
CONSTRUCTION EASEMENT OR AS SHOWN ON PLANS.
5. SILT FENCE SHALL REMAIN IN PLACE UNTIL CONSTRUCTION ACTIVITIES ASSOCIATED WITH
THE STREAM CROSSING WILL TAKE PLACE, AND THEN PROMPTLY REPLACED FOLLOWING
PIPE INSTALLATION.
TYPICAL PRE -CONSTRUCTION STREAM CROSSING DETAIL
NOT TO SCALE
IN THE EVENT OF CONFLICT BETWEEN THESE DRAWINGS AND THOSE OF THE
APPROVED E&SC PLAN, THOSE DRAWINGS APPROVED BY NCDEQ SHALL APPLY.
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NTS
09/25/2019
7335-19-023
r411Piedmont
Natural Gas D2

20-FEET MIN.
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SILT FENCE v v
(INSTALL SECOND ROW OF SILT
FENCE 2 FEET LANDWARD OF
SINGLE ROW AS NEEDED BASED
ON CONDITIONS IN THE FIELD)
SEDIMENT TUBE OR J I I
EARTHEN BERM COFFER
DAM
PROPOSED
PIPELINE
SILT .
BAG
20-FEET MIN.
TRENCH DEWATERING HOSE
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PUMP AROUND HOSE
20-FEET MIN.
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TEMPORARY
BRIDGE
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SPOIL PILE
STREAM BED
SUBSTRATE SPOILS
20-FEET MIN.
STREAM
FLOW SCREENED INTAKE
DURING CONSTRUCTION
TYPICAL PUMP AROUND STREAM CROSSING
TYPICAL PUMP BY-PASS STREAM CROSSING DETAIL
NOT TO SCALE
IN THE EVENT OF A CONFLICT BETWEEN THESE DRAWINGS AND THOSE OF THE
APPROVED E&SC PLAN, THOSE DRAWINGS APPROVED BY NCDEQ SHALL APPLY.
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PUMP AROUND STREAM CROSSING NOTES:
1. LIMIT DISTURBANCE WIDTH TO 50-FEET OR LESS AT STREAM CROSSINGS WITHIN 50-FOOT WIDE
EXISTING OR PROPOSED EASEMENT OR AS OTHERWISE INDICATED ON PLAN VIEW DRAWINGS. a
2. REFER TO APPLICABLE REQUIREMENTS OF LOCAL, STATE, AND FEDERAL PERMITS. I I I E
3. PROJECT SHALL BE CONSTRUCTED AND MAINTAINED IN STRICT ACCORDANCE WITH ALL GENERAL,
REGIONAL AND SPECIFIC CONDITIONS OF NATIONWIDE PERMIT 12. A COPY OF THESE PERMIT
CONDITIONS SHALL BE MAINTAINED ON -SITE AT ALL TIMES.
4. CONSTRUCT TEMPORARY COFFER DAMS WITHIN EDGES OF CONSTRUCTION EASEMENT. REFER TO
COFFER DAM DETAIL FOR HEIGHT AND OTHER SPECIFICATIONS.
5. CONTRACTOR SHALL DEWATER AREA BETWEEN DAMS AND ENSURE TIGHT SEAL OF DAMS PRIOR
TO TRENCHING. CONTRACTOR SHALL BE RESPONSIBLE FOR PASSING ALL WATER WHICH IS TO BE
FILTERED THROUGH A SILT BAG PLACED ON APPROPRIATE E&SC MEASURE. INSTALL SILT FENCE ON
THREE DOWNGRADIENT SIDES OF SILT BAG. DEWATERING PUMPS SHALL BE PLACED WITHIN
SECONDARY CONTAINMENT.
6. SCREEN PUMP INTAKES TO MINIMIZE ENTRAINMENT OF AQUATIC LIFE. PLACE PUMP INTAKE
UPSTREAM OF UPSTREAM COFFER DAM. PLACE BYPASS HOSE OUTSIDE OF STREAM BANKS WITH
DISCHARGE DOWNSTREAM OF DOWNSTREAM COFFER DAM BEFORE COMMENCING BYPASS. TAKE
MEASURES TO PREVENT STREAMBED SCOUR AT PUMP DISCHARGE. TAKE REASONABLE MEASURES
TO PREVENT INTAKE FROM SUCTIONING THE STREAM SUBSTRATE.
7. THE PUMP(S) SHALL BE OF SUFFICIENT SIZE TO CONVEY NORMAL STREAM FLOW. STANDBY PUMPS
AND GENERATORS CAPABLE OF HANDLING 100% OF ANTICIPATED FLOW SHALL BE MAINTAINED
ON -SITE IN CASE OF PUMP FAILURE OR A RAIN EVENT. CONTINUOUSLY MONITOR THE DAM AND
PUMPS TO ENSURE PROPER OPERATION THROUGHOUT THE WATERBODY CROSSING. ALL PUMPS
SHALL BE PLACED WITHIN SECONDARY CONTAINMENT TO REDUCE POTENTIAL FOR FUEL SPILLS.
8. ALL STREAM CROSSINGS SHOULD BE MADE PERPENDICULAR TO THE STREAM TO THE EXTENT
PRACTICAL OR AS SHOWN ON PERMITTED PLANS. INSTALL SILT FENCE PERPENDICULAR TO THE
CONSTRUCTION EASEMENT AT STREAM CROSSINGS. EXTEND SILT FENCE 20-FEET MINIMUM ON
BOTH SIDES OF EDGE OF CONSTRUCTION EASEMENT OR AS SHOWN ON PLANS.
9. LIMIT THE REMOVAL OF VEGETATION TO THE CONSTRUCTION EASEMENT AREA. ONLY HAND
CLEARING IS ALLOWED ON STREAM BANKS AND WITHIN 10-FEET OF TOP OF BANK.
10. STREAM CROSSINGS SHOULD BE CONDUCTED "IN THE DRY" DURING LOW FLOW CONDITIONS.
LOCAL WEATHER CONDITIONS SHALL BE MONITORED IN ORDER TO AVOID ANTICIPATED RAINFALL
EVENTS DURING, OR IMMEDIATELY FOLLOWING, INSTALLATION OF THE PIPE.
11. CROSSINGS SHALL BE EXECUTED IN THE MINIMAL AMOUNT OF TIME NECESSARY; BEGIN INSTREAM
WORK IN THE MORNING, PIPE INSTALLATION AND STREAMBANK RESTORATION SHALL OCCUR
WITHIN A 24 HOUR PERIOD TO THE FULLEST EXTENT PRACTICAL. IN NO INSTANCE SHOULD
INSTALLATION AND RESTORATION EXCEED 48 HOURS WITHOUT APPROVAL OF THE
ENVIRONMENTAL MONITOR.
12. CONTRACTOR SHALL ATTEMPT TO SEGREGATE STREAM BED SUBSTRATE FROM SUBGRADE.
13. NO WASTES, SPOILS, SOLIDS OR FILLS WILL BE PLACED WITHIN STREAMS, WETLANDS OR RIPARIAN
AREAS BEYOND THE LIMITS OF THOSE DEPICTED ON THE PERMITTED DRAWINGS.
14. ALL STREAM CROSSINGS SHALL BE RESTORED TO ORIGINAL GRADE AND CONTOURS TO FULLEST
EXTENT PRACTICAL, ONCE CONSTRUCTION IS COMPLETE. AFTER SUBGRADE HAS BEEN BACKFILLED
APPLY STREAM SUBSTRATE, TO THE FULLEST EXTENT PRACTICAL.
15. IF CONSTRUCTION ACTIVITIES REQUIRE EQUIPMENT TO CROSS THE STREAM, TEMPORARY BRIDGING
WILL BE USED.
16. ADDITIONAL SITE SPECIFIC MEASURES MAY BE NECESSARY IN ORDER TO PROTECT AFFECTED
STREAMS & WETLANDS AND PREVENT VIOLATIONS OF WATER QUALITY STANDARDS.
r6111Piedmont
Natural Gas
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NTS
09/25/2019
7335-19-023
D3
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20-FEET MIN.
SILT FENCE
(INSTALL SECOND ROW OF SILT
FENCE 2 FEET LANDWARD OF
SINGLE ROW AS NEEDED BASED
ON CONDITIONS IN THE FIELD)
SEDIMENT TUBE
OR EARTHEN BERM
PROPOSED
PIPELINE
0
SILT
BAG
20-FEET MIN.
TRENCH DEWATERING HOSE
COFFER
DAM
20-FEET MIN.
TEMPORARY
BRIDGE
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STREAM
FLOW
DURING CONSTRUCTION
TYPICAL FLUME STREAM CROSSING
20-FEET MIN.
TYPICAL FLUME STREAM CROSSING DETAIL (OPTIONAL)
NOT TO SCALE
IN THE EVENT OF A CONFLICT BETWEEN THESE DRAWINGS AND THOSE OF THE
APPROVED E&SC PLAN, THOSE DRAWINGS APPROVED BY NCDEQ SHALL APPLY.
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SUBGRADE
SPOIL PILE
STREAM BED
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FLUME STREAM CROSSING NOTES:
1. REFER TO AUTHORIZED PERMITS FOR ADDITIONAL LOCAL, STATE, AND FEDERAL
REQUIREMENTS.
2. MECHANICAL EQUIPMENT SHALL NOT OPERATE WITHIN STREAMS OR TRAVERSE STREAMS
WITHOUT THE USE OF TEMPORARY BRIDGES.
3. CONSTRUCT TEMPORARY COFFER DAMS WITHIN EDGES OF CONSTRUCTION EASEMENT.
CONSTRUCT DAMS USING SANDBAGS COVERED WITH CLEAN 20 MIL HDPE LINER.
CONTRACTOR MAY USE OTHER METHODS FOLLOWING APPROVAL FROM THE
ENVIRONMENTAL INSPECTOR AND THE OWNER.
4. THE HEIGHT OF THE COFFER DAM SHALL BE CALCULATED BY USING H/4 + 1-FEET WHERE H =
HEIGHT OF STREAM BANK WITH A 2-FEET MINIMUM DAM HEIGHT. ADDITIONAL HEIGHT MAY
BE REQUIRED BASED ON FLOW CONDITIONS AT THE TIME OF CONSTRUCTION.
5. CONTACTOR SHALL DEWATER AREA BETWEEN DAMS AND ENSURE TIGHT SEAL OF DAMS PRIOR
TO TRENCHING. CONTRACTOR SHALL BE RESPONSIBLE FOR PASSING ALL WATER WHICH IS TO
BE FILTERED THROUGH A SILT BAG. INSTALL 12-INCH COMPOST FILTER SOCK ON THREE
DOWNGRADIENT SIDES OF SILT BAG. DEWATERING PUMPS SHALL BE PLACED WITHIN
SECONDARY CONTAINMENT TO REDUCE POTENTIAL FOR FUEL SPILLS.
6. INSTALL FLUME PIPE AND PROVIDE A MINIMUM OF 12-INCHES OF COVER OR V3 DIAMETER OF
PIPE FOR FLUMES GREATER THAN 36-INCH IN DIAMETER. CONTRACTOR IS RESPONSIBLE TO
SIZE FLUME PIPE TO ADEQUATELY ACCOMMODATE BANK FULL FLOWS. ALIGN FLUME PIPE(S)
TO PREVENT BANK EROSION AND STREAMBED SCOUR.
7. ALL STREAM CROSSINGS SHOULD BE MADE PERPENDICULAR TO THE STREAM TO THE EXTENT
PRACTICAL. INSTALL SILT FENCE PERPENDICULAR TO THE CONSTRUCTION EASEMENT AT
STREAM CROSSINGS. EXTEND SILT FENCE 20-FEET MINIMUM ON BOTH SIDES OF EDGE OF
CONSTRUCTION EASEMENT OR AS SHOWN ON PLANS.
8. LIMIT THE REMOVAL OF VEGETATION TO THE CONSTRUCTION EASEMENT AREA. ONLY HAND
CLEARING IS ALLOWED ON STREAM BANKS AND WITHIN 10-FEET OF TOP OF BANK.
9. STREAM CROSSINGS SHOULD BE CONDUCTED "IN THE DRY" DURING LOW FLOW CONDITIONS.
LOCAL WEATHER CONDITIONS SHALL BE MONITORED IN ORDER TO AVOID ANTICIPATED
RAINFALL EVENTS DURING, OR IMMEDIATELY FOLLOWING, INSTALLATION OF THE PIPE.
10. CROSSINGS SHALL BE EXECUTED IN THE MINIMAL AMOUNT OF TIME NECESSARY; BEGIN
INSTREAM WORK IN THE MORNING, INSTALLATION AND RESTORATION SHALL OCCUR WITHIN
A 24-HOUR PERIOD TO THE FULLEST EXTENT PRACTICAL. IN NO INSTANCE SHOULD
INSTALLATION AND RESTORATION EXCEED 48 HOURS WITHOUT APPROVAL OF THE
ENVIRONMENTAL MONITOR.
11. CONTRACTOR SHALL ATTEMPT TO SEGREGATE STREAM BED SUBSTRATE FROM SUBGRADE.
12. DO NOT REMOVE FLUME PIPE DURING TRENCHING, PIPELAYING, OR BACKFILLING ACTIVITIES,
OR INITIAL STREAMBED RESTORATION EFFORTS.
13. NO WASTES, SPOILS, SOLIDS OR FILLS WILL BE PLACED WITHIN STREAM S,WETLANDS, OR
RIPARIAN AREAS BEYOND THE LIMITS OF THOSE DEPICTED ON THE DRAWINGS.
14. ALL STREAM CROSSINGS SHALL BE RESTORED TO ORIGINAL CONTOURS TO FULLEST EXTENT
PRACTICAL, ONCE CONSTRUCTION IS COMPLETED. AFTER SUBGRADE HAS BEEN BACKFILLED
APPLY STREAM SUBSTRATE, TO THE FULLEST EXTENT PRACTICAL.
15. IF CONSTRUCTION ACTIVITIES REQUIRE EQUIPMENT TO CROSS THE STREAM, TEMPORARY
BRIDGING WILL BE USED.
16. ADDITIONAL SITE SPECIFIC MEASURES MAY BE NECESSARY IN ORDER TO PROTECT AFFECTED
STREAMS AND PREVENT VIOLATIONS OF WATER QUALITY STANDARDS.
17. ENVIRONMENTAL INSPECTOR TO ASSIST IN DETERMINATION OF WHETHER PUMP AROUND OR
FLUME STREAM CROSSING METHOD IS TO BE USED.
C411Piedmont
Natural Gas
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NTS
09/25/2019
7335-19-023
D4

20-FEET MIN.
RIPARIAN SEEDING AREA
TO EXTEND A MIN. OF
10-FEET LANDWARD
SILT FENCE
(INSTALL SECOND ROW OF SILT
FENCE 2 FEET LANDWARD OF
SINGLE ROW AS NEEDED BASED
ON CONDITIONS IN THE FIELD)
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INSTALL COIR
MATTING
(SEE NOTE 3)
20-FEET MIN.
10-FEET MIN.
-W,
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10-FEET
MIN.
STREAM
FLOW
PLAN VIEW
INSTALL COIR
MATTING
(SEE NOTE 3)
20-FEET MIN.
10-FEET
MIN.
20-FEET MIN.
1013d4L0]►�11,01411101►&1101ALTA [4lZ01f11►14►[0111*3
1. REFER TO AUTHORIZED PERMITS FOR ADDITIONAL LOCAL,
STATE, AND FEDERAL BMP REQUIREMENTS.
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2. FOLLOWING CONSTRUCTION, ALL STREAM CROSSINGS
SHALL BE RESTORED TO ORIGINAL CONTOURS, TO THE
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FULLEST EXTENT PRACTICAL.
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3. ONCE ORIGINAL STREAM BANK CONTOURS HAVE BEEN
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RE-ESTABLISHED TO FULLEST EXTENT PRACTICAL,
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DISTURBED STREAM BANKS WILL BE STABILIZED WITH
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RIPARIAN SEED MIX (SEE RIPARIAN SEED SPECIFICATIONS),
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AND COIR MATTING WITH THE FOLLOWING
SPECIFICATIONS:
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MINIMUM SHEAR STRENGTH VALUE >/= TO 2.25
LBS/SQ. FT. AND APPROVED BY ENGINEER
4. COIR MATTING SHALL EXTEND FROM 10 FEET LANDWARD
OF THE TOP OF BANK DOWNSLOPE TO THE TOE OF BANK.
DO NOT INSTALL MATTING IN STREAM BED. RIPARIAN SEED
MIX SHALL EXTEND FROM 50-FEET LANDWARD OF THE TOP
OF BANK DOWNSLOPE TO THE TOE OF BANK.
5. ONCE CONSTRUCTION ACTIVITIES ASSOCIATED WITH THE
EXTEND COIR MATTING STREAM CROSSING ARE COMPLETE, EXTEND SILT FENCE
10-FEET LANDWARD ACROSS THE ENTIRE EASEMENT ALONG THE TOP OF THE
FROM TOP OF BANK BANK AND PARALLEL TO THE STREAM.
II- III COIR MATTING TO BE
-11 III III- INSTALLED PER
III .11-II MANUFACTURERS
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BACKFILLED PROPOSED PIPELINE
CROSS-SECTION
TYPICAL POST CONSTRUCTION STREAM DETAIL
NOT TO SCALE
6. PERMANENT MAINTAINED ACCESS CORRIDORS SHALL BE
RESTRICTED TO THE MINIMUM WIDTH PRACTICAL AND
SHALL NOT EXCEED 35-FEET IN WIDTH.
IN THE EVENT OF A CONFLICT BETWEEN THESE DRAWINGS AND THOSE OF THEr6IJI PiedmontNatural �7 a S
APPROVED E&SC PLAN, THOSE DRAWINGS APPROVED BY NCDEQ SHALL APPLY.
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NTS
09/25/2019
7335-19-023
D5

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IN THE EVENT OF A CONFLICT BETWEEN THESE DRAWINGS AND THOSE OF THE
APPROVED E&SC PLAN, THOSE DRAWINGS APPROVED BY NCDEQ SHALL APPLY.
GENERAL NOTES :
1. CONSTRUCT TEMPORARY COFFERDAMS WITHIN EDGES
OF CONSTRUCTION EASEMENT. CONSTRUCT DAMS USING
SANDBAGS COVERED WITH CLEAN 20 MIL HDPE LINER OR
CLEAN STEEL PLATE DRIVEN INTO THE STREAM BANKS
AND STREAM BED. USE SANDBAGS TO SHORE STEEL PLATE
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IF NEEDED.
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2. THE HEIGHT OF THE COFFER DAM SHALL BE CALCULATED
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USING BOTH OF THE FOLLOWING METHODS.
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• H/4 + 1' (H = HEIGHT OF STREAM BANK IN FEET) WITH A
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2-FEET MINIMUM DAM HEIGHT
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COFFER DAM.
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THE COFFER DAM TO KEEP WATER FROM CUTTING
AROUND THE COFFER DAM.
TYPICAL COFFER DAM DETAIL
NOT TO SCALE
r6111 Piedmont
Natural Gas
NTS
09/25/2019
7335-19-023
D6

20-FEET MIN.
10-FEET MIN.
(UNLESS OTHERWISE
DEPICTED ON DRAWINGS)
W W W
W W W
W W W W
W W W W
'WETLAND
W W W
20-FEET MIN.
SILT FENCE
(INSTALL SECOND ROW OF SILT FENCE 2 FEET LANDWARD OF
SINGLE ROW AS NEEDED BASED ON CONDITIONS IN THE FIELD)
20-FEET MIN.
10-FEET MIN.
(UNLESS OTHERWISE
DEPICTED ON DRAWINGS)
10-FEET MIN.
(UNLESS OTHERWISE
DEPICTED ON DRAWINGS)
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20-FEET MIN. 20-FEET MIN.
SILT FENCE
(INSTALL SECOND ROW OF SILT FENCE 2 FEET LANDWARD OF
SINGLE ROW AS NEEDED BASED ON CONDITIONS IN THE FIELD)
WETLAND CROSSING NOTES
1. REFER TO AUTHORIZED PERMITS FOR ADDITIONAL LOCAL, STATE, AND FEDERAL BMP REQUIREMENTS.
2. MECHANICAL EQUIPMENT SHALL NOT OPERATE WITHIN STREAMS OR TRAVERSE STREAMS WITHOUT
THE USE OF TEMPORARY BRIDGES WHEN STREAMS OCCUR WITHIN A WETLAND COMPLEX.
3. INSTALL SILT FENCE PERPENDICULAR TO THE CONSTRUCTION EASEMENT AT WETLAND CROSSINGS
PRIOR TO CLEARING AND GRUBBING (PRE -CONSTRUCTION).
4. INSTALL TIMBER MATS FOR TRAVEL LANE THROUGH WETLAND AREA AND EXTEND A MINIMUM OF
10-FEET LANDWARD FROM THE EDGE OF WETLAND. CONSTRUCTION ACTIVITIES WITHIN WETLANDS
WILL BE CONDUCTED FROM TIMBER MATS. WHERE CLEARING OPERATIONS OCCUR IN WETLANDS, LOW
GROUND PRESSURE EQUIPMENT WILL BE USED AND MIXING OF TOPSOIL AND SUBSOIL PREVENTED IN
AREAS BEYOND THOSE PROTECTED BY TIMBER MATS.
5. NO WASTES, SPOILS, SOLIDS OR FILLS WILL BE PLACED WITHIN WETLANDS, WATERS OR RIPARIAN AREAS
BEYOND THE PERMITTED DISTURBANCE LIMITS . DEWATERING SHALL BE CONDUCTED THROUGH SILT
BAG OR SEDIMENTATION CONTROL MEASURE THAT IS LOCATED WITHIN THE EASEMENT AND OUTSIDE
OF ANY WETLANDS AREA.
6. DURING EXCAVATION IN WETLANDS, THE SOILS SHALL BE PLACED ON A GEOTEXTILE FABRIC TO
MINIMIZE IMPACTS WHENEVER POSSIBLE.
7. BASED ON CONDITIONS IN THE FIELD THE ENVIRONMENTAL INSPECTOR MAY DETERMINE ADDITIONAL
MEASURES SUCH AS 12-INCH DIAMETER COMPOST FILTER SOCKS MAY BE INSTALLED WITHIN THE
WETLAND AT THE PERIMETER OF THE LIMITS OF DISTURBANCE TO REDUCE THE POTENTIAL FOR OFFSITE
SEDIMENTATION.
8. SEGREGATE TOPSOIL WHEN STOCK PILING EXCAVATED WETLAND SOIL. TOPSOIL SHOULD BE STORED IN
A MANNER TO MAINTAIN SEED BANK. REPLACE TOPSOIL AFTER BACK FILLING TRENCH.
IN THE EVENT OF A CONFLICT BETWEEN THESE DRAWINGS AND THOSE OF THE
APPROVED E&SC PLAN, THOSE DRAWINGS APPROVED BY NCDEQ SHALL APPLY.
18" DIA. COMPOST
FILTER SOCK OR
EARTHEN BERM
TYPICAL WETLAND CROSSING DETAIL
NOT TO SCALE
20-FEET MIN.
W W W
W WETLAND W
PI L
/ NATIVE WETLAND
SEEDING AREA
DURING CONSTRUCTION
20-FEET MIN.
10-FEET MIN.
_
(UNLESS OTHERWISE
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DEPICTED ON DRAWINGS)
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20-FEET MIN.
9. ONCE CONSTRUCTION IS COMPLETED, WETLAND CROSSINGS SHALL BE RESTORED TO ORIGINAL
CONTOURS, TO THE EXTENT PRACTICAL.
10. FOLLOWING PIPE INSTALLATION, REINSTALL SILT FENCE PERPENDICULAR TO THE CONSTRUCTION
EASEMENT AT WETLAND CROSSINGS.
11. FOLLOWING CONSTRUCTION, DISTURBED AREAS ASSOCIATED WITH TEMPORARY WETLAND CROSSINGS
WILL BE STABILIZED WITH A NATIVE SEED MIX (SEE NATIVE WETLAND SEEDING SPECIFICATIONS). THIS
SEED MIX WILL BE INSTALLED WITH A TEMPORARY GROUNDCOVER SPECIES AND WILL COVER THE
DISTURBED WETLANDS AND EXTEND 10- FEET LANDWARD FROM THE JURISDICTIONAL BOUNDARY
12. DO NOT APPLY MULCH OR SOIL AMENDMENTS WITHIN WETLANDS.
WETLAND CROSSING MAINTENANCE NOTES:
1. INSPECT SILT FENCE AT LEAST WEEKLY AND AFTER EACH RAINFALL EVENT THAT EXCEEDS 0.5 INCHES
WITHIN A 24 HOUR PERIOD.
2. REMOVE SEDIMENT DEPOSITS AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT
RAIN.
3. REMOVE ALL SILT FENCE AND UNSTABLE SEDIMENT DEPOSITS AND BRING THE AREA TO GRADE AND
STABILIZE IT AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED.
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09/25/2019
7335-19-023
r6lil
Piedmont
Natural Gas D7

MACHINE
CLEARING
ONLY AREA
SOIL
INSTALLATION NOTE.
1, USE 6" OF COMPACTED ABC STONE AS SHOWN
ON PLAINS. STONE TYPICALLY INSTALLED ON
SLOPES OF 0% OR MORE.
MAINTENANCE NOTE:
1. MONITOR TO SUPPLEMENT STONE OR BLADE TO
MAINTAIN UNIFORM RIDING SURFACE.
IN THE EVENT OF A CONFLICT BETWEEN THESE DRAWINGS AND THOSE OF THE
APPROVED E&SC PLAN, THOSE DRAWINGS APPROVED BY NCDEQ SHALL APPLY.
30'-0" DISTURBED AREA FOR ACCESS ROAD
CLEARING AND GRUBBING AREA
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MACHINE
CLEARING
ONLY AREA
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FOUNDATION (ESPECIALLY IMPORTANT
INHERE SOFT SOIL IS ANTICIPATED)
ACCESS ROAD DETAIL
r611I Piedmont
Natural Gas
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09/25/2019
7335-19-023
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