SWA000228_Construction Sequence_20240314

Construction Sequence
1. CONTRACTOR SHALL OBTAIN A COPY OF THE APPROVED EROSION CONTROL PLAN
AND MAINTAIN A COPY OF THE PLAN ON SITE THROUGHOUT DURATION OF
CONSTRUCTION.
2. PRIOR TO BEGINNING CONSTRUCTION, CONTRACTOR MUST LOCATE ALL EXISTING
UTILITIES (PUBLIC AND PRIVATE). CONTACT THE ENGINEER IF ANY CONFLICTS ARISE.
3. NO LAND DISTURBING ACTIVITY BEYOND THAT REQUIRED TO INSTALL APPROPRIATE
EROSION CONTROL MEASURES MAY PROCEED UNTIL THE EROSION CONTROL
MEASURES ARE INSPECTED AND APPROVED BY NCDEQ.
4. CONTRACTOR MUST SCHEDULE A PRE-CONSTRUCTION MEETING WITH THE EROSION
CONTROL INSPECTOR PRIOR TO INITIATING LAND DISTURBANCE ACTIVITIES.
5. LIMIT CLEARING, DEMOLITION, AND LAND DISTURBING ACTIVITY TO ONLY THE AREA
NECESSARY TO INSTALL THE PERMITTED EROSION CONTROL MEASURES FOR PHASE
1.
6. INSTALL CONSTRUCTION ENTRANCE, SAFETY FENCE, INLET PROTECTION, SILT FENCE,
AND SILT FENCE OUTLETS AS INDICATED ON PLAN.
7. INSTALL SEDIMENT TRAP
8. ADJUST EROSION AND SEDIMENT CONTROL MEASURES AS NECESSARY FOR PROPER
OPERATION. INSTALL ADDITIONAL EROSION CONTROL MEASURES IF DETERMINED
NECESSARY BY INSPECTOR.
9. MAINTAIN ALL EROSION AND SEDIMENT CONTROL MEASURES IN GOOD WORKING
ORDER. THE SEDIMENT TRAP, SILT FENCE, SILT FENCE OUTLETS, AND OTHER SIMILAR
MEASURES MUST BE CLEANED OUT BEFORE THEY ARE HALF FULL. CLOGGED STONE
FILTERS MUST BE REFRESHED/REPLACED. SILT FENCE CANNOT HAVE HOLES OR
TEARS.
10. MAINTAIN ALL EXISTING EROSION CONTROL FEATURES PREVIOUSLY CONSTRUCTED
AND ASSOCIATED WITH PHASE I EROSION CONTROL.
11. SELF-INSPECTIONS FOR EROSION AND SEDIMENTATION CONTROL MEASURES ARE TO
BE PERFORMED AT LEAST ONCE EVERY SEVEN CALENDAR DAYS AND WITHIN 24
HOURS OF EVERY RAIN EVENT OF GREATER THAN 1 INCH. ANY NEEDED REPAIRS
SHALL BE MADE IMMEDIATELY TO MAINTAIN MEASURES AS DESIGNED. ALL EROSION
CONTROL MEASURES SHALL BE MAINTAINED AS SPECIFIED IN THE CONSTRUCTION
DETAILS ON THIS PLAN. A RAIN GAUGE SHALL BE INSTALLED AT THE PROJECT SITE
FOR MONITORING.
12. BEGIN INSTALLATION OF THE STORM PIPE SYSTEM. INSTALL STORM DRAINAGE
SYSTEM FROM OUTLET POINTS (LOW END)AND WORK UPSTREAM. PIPE INLET
PROTECTION SHALL BE UTILIZED AT THE END OF EACH WORK DAY TO ASSURE PIPE
NETWORK IS NOT INUNDATED WITH SEDIMENT.
13. INSTALL SITE IMPROVEMENTS, STORMWATER DRAINAGE SYSTEM, UTILITY SERVICES,
SIDEWALK AND DRIVEWAYS AS SHOWN ON THE APPROVED PLANS. ALL OPEN
TRENCHES FOR UTILITY AND STORMWATER INSTALLATION SHALL BE PROTECTED
FROM SEDIMENTATION BY PILING EXCAVATED MATERIAL ON THE UPHILL SIDE OF
EXCAVATION. PROVIDE PIPE INLET PROTECTION AT THE END OF EACH DAY. OUTLET
PROTECTION SHALL BE INSTALLED UPON COMPLETION.
14. INSTALL ADEQUATE EROSION AND SEDIMENT CONTROL MEASURES AND/OR INCREASE
MAINTENANCE FREQUENCY WHERE APPROVED MEASURES FAIL TO PREVENT
ACCELERATED EROSION, OFF-SITE SEDIMENTATION, OR REPETITIVE NON-
COMPLIANCE ISSUES. ALL MEASURES MUST BE INSTALLED PER PLAN DETAIL. ENSURE
CONSTRUCTION TRAFFIC IS LIMITED TO THE CONSTRUCTION ENTRANCE ONLY.
15. MODIFICATIONS TO THE APPROVED AND PERMITTED PLANS SHALL BE APPROVED BY
NEW HANOVER COUNTY ENGINEERING PRIOR TO REMOVAL OR INSTALLATION.
CONTACT THE EROSION CONTROL INSPECTOR TO OBTAIN SIGN-OFF ON THE PLANS.
16. MAINTAIN ALL EROSION AND SEDIMENT CONTROL MEASURES IN GOOD WORKING
ORDER. SILT FENCE, INLET PROTECTION, AND OTHER SIMILAR MEASURES MUST BE

CLEANED OUT BEFORE THEY ARE HALF FULL. CLOGGED STONE FILTERS MUST BE
REFRESHED/REPLACED. SILT FENCE CAN NOT HAVE HOLES OR TEARS.
17. PERIMETER MEASURES MUST BE LEFT IN PLACE UNTIL ALL UPLAND AREAS ARE
PERMANENTLY STABILIZED. AFTER SITE IS PERMANENTLY STABILIZED, REMOVE ALL
TEMPORARY EROSION CONTROL MEASURES AND PROVIDE PERMANENT SEEDING
WHERE TEMPORARY MEASURES HAVE BEEN REMOVED AND GROUND COVER IS NOT
ADEQUATE. SEDIMENT BASINS MAY NOT BE REMOVED OR CONVERTED TO
PERMANENT BMPs UNTIL ALL UPLAND AREAS ARE PERMANENTLY STABILIZED.
18. GROUND COVER SHALL BE PROVIDED AS FOLLOWS: • FOR ALL AREAS OF MODERATE
AND/OR STEEP SLOPES, PROVIDE TEMPORARY GROUND COVER IF THE SLOPE HAS
NOT BEEN DISTURBED FOR A PERIOD OF FOURTEEN (14) DAYS. SLOPES GREATER
THAN 3:1 REQUIRE GROUND COVER IN 7 DAYS. • PROVIDE GROUND COVER
SUFFICIENT TO RESTRAIN EROSION ON ANY PORTION OF THE SITE UPON WHICH
FURTHER LAND-DISTURBING ACTIVITY IS NOT BEING UNDERTAKEN WITHIN FOURTEEN
(14) CALENDAR DAYS OF TEMPORARILY OR PERMANENTLY SUSPENDING LAND
DISTURBING ACTIVITY.• ESTABLISH PERMANENT GROUND COVER SUFFICIENT TO
RESTRAIN EROSION WITHIN FOURTEEN (14) CALENDAR DAYS FOLLOWING
COMPLETION OF CONSTRUCTION OR DEVELOPMENT AND/OR PRIOR TO FINAL
INSPECTION.
19. ONCE GRADING IS COMPLETE, ALL UTILITIES AND STORM SYSTEMS ARE INSTALLED
AND THE SITE IS COMPLETELY STABILIZIED, CLEAN OUT SEDIMENT BASINS AND
CONVERT TO WET PONDS AS FOLLOWS:
19.1. REMOVE ALL SEDIMENT ACCUMULATION FROM THE SEDIMENT BASINS, AND
ALL DRAINAGE STRUCTURES.
19.2. REMOVE TEMPORARY SKIMMER.
14.3. REGRADE BOTTOM OF BASIN, BASIN SLOPES, AND SPILLWAY AS REQUIRED TO
OBTAIN THE ORIGINAL PLAN SPECIFICATION AND DETAILS OF THE WET PONDS.
19.4. INSTALL RISER STRUCTURES AND DISCHARGE PIPES PER SPECIFICATIONS AND
DETAILS
20. AFTER THE EROSION BASINS ARE REMOVED, ENSURE RIPRAP PADS AND GRADES AT
THE PIPE OUTLETS ARE ADJUSTED TO FINISHED GRADE.
21. AT A MINIMUM OF SEVEN (7) DAYS PRIOR TO SCHEDULING THE STORMWATER FINAL
INSPECTION, SUBMIT ANY REQUIRED PAPERWORK TO THE EROSION CONTROL
INSPECTORS FOR APPROVAL.