Construction Storm Water Challenges at Ingalls Shipbuilding March 14, 2019 Chris Griffith Environmental Engineer
2 Ingalls Shipbuilding • Building four classes of ships simultaneously — 11 ships under construction • Sole builder of the San Antonio- class (LPD 17) amphibious transport docks and the America -class (LHA 6) amphibious assault ships • One of two builders of DDG 51 Arleigh Burke -class destroyers • Sole builder of the Legend -class National Security Cutters for the U.S. Coast Guard • Largest private employer in Mississippi – approximately 11,600 employees USCG National Security Cutter LPD 17 Class Amphibious Transport LHA 6 Amphibious Assault Ship DDG 51 Surface Combatants
3 Personal Perspective Private Regulator Sector
4 Construction Sites • East Bank – 115 acres – Production began 1938 – Halted by Hurricane Katrina 2005 – “Revitalization” plan
East Bank “Revitalization” 5 • Challenges – Distance and no-drive times – Visibility • Daily operations • Public – Scale • 54 acres • 8 contracts
6 West Bank Projects • CSA III – Overview • Increase production • Improve storm water quality – Advantages • Visibility • Public roads • Distance to receiving waters
7 West Bank Projects • North East/West Track – Overview • Small construction • Increase portal crane access • New translation rails – Challenges • No exposed soils • Saw cutting • Dewatering • Hazards
8 Staying in Compliance • Obtain coverage ( before construction) Large Small ≥ 5 acres < 5 acres Submit Submittal Upon Required Request
9 Staying in Compliance • Know the permit – Permit vs. SWPPP • Fence maintenance – Permit: 1/3 to 1/2 – SWPPP: 1/3 • Sediment basins • Inspection frequency – At least weekly 4/month – Tuesdays – Dewatering – “ S teep slopes” Ceds.org – Vegetative barriers
10 Staying in Compliance • Know SWPPP – Often written by engineering firm – 1 st item requested by inspector – Contractor copy • Subs aware of language – Specific locations: • Chute washout • Maintenance • Fueling Containment • Material storage
11 Staying in Compliance • Inspection logs – NOI forms contain inspection log – Use your own • Greater detail Weather • Be honest – Check contractor logs – Get dirty Imgflip.com
“Sanitary Waste” 12
“Steep Slopes” 13
14 Chute Washout
15 Chute Washout
16 Chute Washout
17 Saw Cutting
18 Dewatering
19 East Bank
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30 Summary Coverage Permit SWPPP Inspections
31 Ingalls Shipbuilding Questions?
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