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Delaware's Water Supply Coordinating Council
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| Scenario
Year |
Supply (mgd) | Demand (mgd) | +/- (mgd) | Volume (mgd) |
| 2003 | 82.0 | 83.3 | -1.3 | -97 |
| 2010 | 82.0 | 86.3 | -4.3 | -322 |
| 2020 | 82.0 | 88.0 | -6.0 | -450 |
Future Water Supply Options
At the November 21 and December 12, 2002 meetings, the WSCC identified a series of additional water supply projects that could be constructed to meet a projected 2020 deficit of 262 to 450 mg, depending on the assumption of minimum stream flow standards (7Q50 or 7Q10) that could be imposed along the Brandywine Creek by 2020. Members of the WSCC then nominated projects that each would sponsor and have the potential for groundbreaking on a fast track status. Each of the sponsors provided a report summarizing the status of their project with a conceptual evaluation of project feasibility and volume (mg/mgd) based on the following criteria:Engineering: Estimate feasibility from a technical, hydraulic, and/or geologic perspective(s).
Environmental: List the environmental/ecological benefits and constraints.
Regulatory: List federal, state, and local permitting requirements.
Economic: Estimate the capital plus annual operating and maintenance costs.
Community: Determine if the project will have community support.
Timing: Forecast chances for project groundbreaking and/or completion by end of 2003.
The WSCC decided that the following options are most practical for a new "A List" to close the 262 to 450 mg gap between water supply and demand in northern Delaware projected for 2020:
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Sponsor
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Project
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Volume
(mg)
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Capital
Cost
(Cost/mg) |
Status
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| City
of Wilmington United Water Delaware |
Raise Water Level in Hoopes Reservoir by 1 foot to 5 feet | 60-375 | $4.0-$5.0
M ($13,333-$66,667) |
Retained consultants for topographic, forestry, structural, and hydraulic analysis. |
| City of Wilmington | Increase Hoopes Pump Station Capacity | 36-510 | $0.4-$9.2
M ($3,704-$18,039) |
City retaining consultant to conduct $50,000 study with State DNREC funding. |
| Artesian Water Co. | Aquifer Storage and Recovery | 150 | $1.2 M ($8,000) | Retained consultant to conduct testing at Wilmington Manor Gardens and Artisans Village Sites. |
| United Water Delaware | Aquifer Storage and Recovery | 225 | $4.0M ($17,777) | Retained consultant to conduct testing near Del. City and Smalleys Pond. Smalleys Pond site study completed:not feasible. |
| United Water Delaware | Modification of Tidal Capture Structure Operating Plan | 75 to 500 | None Identified | Retained ecological consultant, waiting to conduct low flow testing during Summer 2004. |
Summary
The water purveyors on the Water Supply Coordinating Council are working deliberately to develop additional water supplies in northern New Castle County. The Newark Reservoir is under design as scheduled and the City of Wilmington has determined that water is available from deep storage in Hoopes Reservoir. The City of Newark and Artesian Water Company are improving their groundwater supplies. Artesian installed a carbon filtration plant at the Llangollen Wellfield when a semivolatile chemical was discovered in the water supply.The water purveyors have improved the capacity and reliability of the northern New Castle County interconnected system. Based on the work to date, the members of the Water Supply Coordinating Council are more prepared to face the next drought, whenever that may occur.
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Water
Resources Agency
Institute
for Public Administration | College of
Human Services, Education & Public Policy
DGS Annex | University of Delaware |
Newark, DE 19716
phone 302 831 8971| water-info@udel.edu
| fax 302 831 4934
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