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Covel & Associates, LLC1 WATER AND DOWLING VILLAGE Chris Covel, Geologist 5-25-05.

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Presentation on theme: "Covel & Associates, LLC1 WATER AND DOWLING VILLAGE Chris Covel, Geologist 5-25-05."— Presentation transcript:

1 Covel & Associates, LLC1 WATER AND DOWLING VILLAGE Chris Covel, Geologist

2 Covel & Associates, LLC2 SIMPLIFIED EXPRESSION OF THE WATER BALANCE EQUATION OF HYDROLOGY P = T+R+I+E+S P— PRECIPITATION T— TRANSPIRATION R— RUNOFF I— INFILTRATION E— EVAPORATION S— STORAGE

3 Covel & Associates, LLC3 Developments such as Dowling Village will put this equation out of equilibrium by paving over large areas. Paving also presents a potential problem, if the runoff is contaminated. Assume Precipitation average remains the same: Transpiration will decrease Runoff will increase Infiltration will decrease Evaporation will increase Storage will decrease P = T+ R+ I+ E+ S

4 Covel & Associates, LLC4 The site is in a wellhead protection area.

5 Covel & Associates, LLC5 The land is currently forested. The drinking water is considered under moderate threat of contamination. If the land is largely paved, water contamination will increase to high threat. See next page.

6 Covel & Associates, LLC6 The area has 21 acres of wetlands.

7 Covel & Associates, LLC7 University of Rhode Island Lorraine Joubert, Program Director URI Nonpoint Education for Municipal Offices letter dated 26-Apr-05 to Paul Dupuis, N. Smithfield Cons. Com. “If any portion of the commercial development is determined to be within the drinking water supply watershed, then the potential impact to water quantity and quality is a serious concern.” “Reservoir 1 is currently rated at ‘moderate’ risk of contamination, increasing to a ‘high’ risk rating with future development based on current zoning.”

8 Covel & Associates, LLC8 University of Rhode Island Lorraine Joubert, Program Director URI Nonpoint Education for Municipal Offices letter dated 26-Apr-05 to Paul Dupuis, N. Smithfield Cons. Com. “Reduce the extent of land disturbance permitted on the parcel to retain naturally vegetated areas for stormwater infiltration and filtering of sediment, phosphorus and other pollutants.”

9 Covel & Associates, LLC9 University of Rhode Island Lorraine Joubert, Program Director URI Nonpoint Education for Municipal Offices letter dated 26-Apr-05 to Paul Dupuis, N. Smithfield Cons. Com. “The focus should be on controlling runoff volume and providing a very high level of treatment for sediment and phosphorus.”

10 Covel & Associates, LLC10 University of Rhode Island Lorraine Joubert, Program Director URI Nonpoint Education for Municipal Offices letter dated 26-Apr-05 to Paul Dupuis, N. Smithfield Cons. Com. “Rhode Island towns have the authority to hire consulting professionals to assist in review of land development projects to minimize the burden on town staff and provide specialized expertise, using land development application fees to cover the expense.” “This may include…analysis of water quality impacts”

11 Covel & Associates, LLC11 University of Rhode Island Lorraine Joubert, Program Director URI Nonpoint Education for Municipal Offices letter dated 26-Apr-05 to Paul Dupuis, N. Smithfield Cons. Com. “Certainly verifying the exact location of any proposed development project relative to the watershed boundaries and direction of water flow to and from the site would be a priority at the earliest stages of project review.”

12 Covel & Associates, LLC12 Bedrock Aquifer Discussion Major bedrock lineaments. Three different bedrock contacts. Town of North Smithfield’s Comprehensive Plan Five-Year Update 2005, Section G Surface and Groundwater Water Resources refers to OVERBURDEN aquifers only - no BEDROCK discussion

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14 Covel & Associates, LLC14 These lineament fractures also suggest this is a good location for groundwater.

15 Covel & Associates, LLC15 Bedrock Aquifer Discussion If the bedrock aquifers had been mapped, this site would have been identified as a potential bedrock water supply source. Proposed development of this area threatens existing and/or future water supply wells in the site vicinity with potential contamination.

16 Covel & Associates, LLC16 Contaminant Threats NaCl (salt) – parking lot MTBE (Methyl-T-Butyl-Ether) – gasoline additive, parking lot Other Petroleum runoff – parking lot Phosphorus – fertilizer Nitrogen – fertilizer ANFO (Ammonium Nitrate Fuel Oil) – blasting agent

17 Covel & Associates, LLC17 The land is proposed to be mixed use, with large-scale retail.

18 Covel & Associates, LLC18 The site has steep slopes and plentiful bedrock.

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