• 20th Century History of Sequalitchew Creek
• Is Gravel Worth More Than A Wetland?
• NOAA Advisory to City of DuPont, 1992
• 1994 Settlement Agreement
• City of DuPont Staff Report
• CalPortland Mine Expansion Proposal
• Memorandum of Understanding

Mining Well Data (TW-1)

• Well Withdraw Data
• Static Water Level Data
• Chloride Test Data

City of DuPont, Drinking Water Wells

• Wellhead Protection Document
• Source Water Assessment Map
• Central Pierce County, EPA Sole Source Aquifer Designation

The Central Pierce County Aquifer System consists primarily of unconsolidated sediments deposited by glaciers and associated meltwater. The ground water moves regionally toward the Puget Sound and river valleys that constitute the aquifer system boundaries.

Approximately 400,000 people live within the boundaries or in nearby areas which partly utilize ground water from the aquifer system.

Ground water from the aquifer system supplies about 60 percent of the drinking water used within the area. During peak demands, ground water supplies over 80 percent of the drinking water.

At present, the quality of drinking water supplied by the aquifer is generally good, but incidents of contamination are occurring with increasing frequency, and the trend is one of gradually decreasing water quality.

If water in the Sole Source Aquifer were to become unfit to drink, there are no feasible alternative sources of drinking water available.

See NOAA Advisory to City of DuPont, 1992

Federal, State, County and City Laws

• City of DuPont, Washington, Municipal Code
• DMC Sensitive Areas, 25.105.100 Purpose
• RCW 36.70A.060 Natural resource lands and critical areas – development regulations

Additional Information