Craney Island Dredged Material Management Area AIWA Conference
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Transcript of Craney Island Dredged Material Management Area AIWA Conference
US Army Corps of EngineersBUILDING STRONG®
Craney Island Dredged Material Management AreaAIWA Conference
Thomas C. Friberg, P.E.Chief, Operations Support SectionNorfolk District
November 18, 2010
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Craney Island Dredged Material Management Area Proximity
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
NORTH CONTAINMENT CELL
CENTER CONTAINMENT CELL
SOUTH CONTAINMENT CELL
NORTH DIVISION DIKE
SOUTH DIVISION DIKE
spillways
No. 6
No. 5
No. 4
No. 3
No. 2
No. 1
spillways
spillways
Craney Island Dredged Material Management Area
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Craney Island Dredged Material Management Area
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Material Settling State and
Water Removal
Coarser material settles first near the inflow Dredge material settles in a sloping manner as water flows west Clean water is removed by Spillway
Effluent meets all CWA Requirements
East EndWest End
Spillway
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Dredged Material Placement
Inflow Settling
Water RemovalDischarge of Water
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Craney Island Environmental Monitoring
Water Quality• Contractors are required to inspect effluent water every 4-
hours, or 6-times per day.
• Water quality testing for Total Suspended Solids (TSS) is required 2-times per day.
• Additional testing is required if effluent water appears cloudy.
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Craney IslandEnvironmental Monitoring
Water Quality Cont’d:• If effluent water at a spillway appears cloudy, contractors are required
to stop the discharge at the spillway by raising weir boards.
• Contractors are required to document each inspection and testing event.
• Monitoring allows for real-time measurements and allows dredging contractors to take immediate action to modify their operations.
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Craney IslandWildlife
• Renowned as a bird watching spot.• Provides foraging and nesting habitat for more than 270
species.• Balance needs of Port of Hampton Roads while
minimizing impacts on environment.
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Craney IslandWildlife Management
• In cooperation with the College of William and Mary, the Corps has successfully managed T&E bird species at Craney Island while accomplishing our mission requirements.
• The Corps has consistently balanced the needs of the Port of Hampton Roads while ensuring Craney Island operations have minimal impacts on environmental resources.
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Section 148 of PL 94-587: Sec 148.“Chief of Engineers, shall . . . Extend
the capacity and useful life of dredged material disposal areas such that the need for new dredged material disposal areas is kept to a minimum.”
Craney Island Dredged Material Management Area
Congress
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Craney Island Dredged Material Management Area
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Craney Island Dredged Material Management Area
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Craney IslandMarine Terminal Phase I - 2017
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Craney Island Dredged Material Management Area
Fill Date
•Original Site 1980
•Existing Site 2025
•Strip Drains Inside 10 Years
•Westside Berm 10 Years
•South Cell only 5 Years
•Eastward Expansion 5 Years
Projection of Life Expectancy
BUILDING STRONG®US Army Corps of Engineers – Norfolk District
Future Uses