Blake A. Martin Senior Associate Weston & Sampson ...
Geology and Hydrogeology of the Big River Site
Blake A. Martin Senior Associate Weston & Sampson Engineers
Big River Hydrogeologic Conditions
Presented by: Blake A. Martin Environmental Resources Manager May 26, 2010
1894 USGS Map
Objectives
Identify:
Yield Water Quality Potential Impacts Economic Viability
Historic Subsurface Information
Numerous USGS Studies since 1956
More recent USGS studies include:
Craft 2001,
Stone and Dickerman 2002,
Granato and Dickerman 2003, Hydrogeology and Simulated Effects of Groundwater Withdrawals in the Big River Area, Rhode Island.
Granato and Barlow 2005, Effects of Alternative Instream-Flow Criteria and Water-Supply Demands on Ground-Water Development Options in the Big River Area, Rhode Island.
Hydrogeologic Data for the Big River-Mishnock River Stream-Aquifer system, Central Rhode Island. Glacial Geology and Aquifer Characteristics of Big RiverMishnock Stream Aquifer System.
Stone and Dickerman (2002)
Cross Section A – A’
Cross Section D-D’
USGS Pumping Test WGW-356
USGS Pumping Test WGW-411
Predicted Yields
Questions to be Answered
Aquifer lateral extent Induced infiltration Cone of influence
1-foot drawdown level
What Was Completed?
TW-100
Logs
TW-200
Pumping Test
Results
Water Quality Results • No SOCs detected • No VOCs detected • No bacteria detected • Radionuclides/radon below limits
Water Treatment
Aeration (air stripping)
Chemical addition for pH/alkalinity adjustment
Chlorination
Original Estimate of 1-Foot Drawdown
Proposed Production Well Locations
Blake A. Martin Senior Associate Weston & Sampson Engineers
Big River Hydrogeologic Conditions
Presented by: Blake A. Martin Environmental Resources Manager May 26, 2010
1894 USGS Map
Objectives
Identify:
Yield Water Quality Potential Impacts Economic Viability
Historic Subsurface Information
Numerous USGS Studies since 1956
More recent USGS studies include:
Craft 2001,
Stone and Dickerman 2002,
Granato and Dickerman 2003, Hydrogeology and Simulated Effects of Groundwater Withdrawals in the Big River Area, Rhode Island.
Granato and Barlow 2005, Effects of Alternative Instream-Flow Criteria and Water-Supply Demands on Ground-Water Development Options in the Big River Area, Rhode Island.
Hydrogeologic Data for the Big River-Mishnock River Stream-Aquifer system, Central Rhode Island. Glacial Geology and Aquifer Characteristics of Big RiverMishnock Stream Aquifer System.
Stone and Dickerman (2002)
Cross Section A – A’
Cross Section D-D’
USGS Pumping Test WGW-356
USGS Pumping Test WGW-411
Predicted Yields
Questions to be Answered
Aquifer lateral extent Induced infiltration Cone of influence
1-foot drawdown level
What Was Completed?
TW-100
Logs
TW-200
Pumping Test
Results
Water Quality Results • No SOCs detected • No VOCs detected • No bacteria detected • Radionuclides/radon below limits
Water Treatment
Aeration (air stripping)
Chemical addition for pH/alkalinity adjustment
Chlorination
Original Estimate of 1-Foot Drawdown
Proposed Production Well Locations
