- National Park Service
- Statewide Arizona, Colorado, and Utah
- Our Role
- Modeling, Analysis Studies, Inspection Services.
- Drinking water source protection plans for four marinas
- Met Utah DEQ’s evaluation of drinking water sources requirement.
Under requirements established by the Utah Department of Environmental Quality (DEQ), Division of Drinking Water, the National Park Service (NPS) was required as public purveyor of drinking water to conduct an evaluation of the potential vulnerability of its drinking water sources to contamination. Services were required for one well in Arizona at Wahweap Marina, and three wells in Utah at Dangling Rope Marina, Bullfrog Marina, and Hall's Crossing Marina.
The water systems serve the somewhat isolated marina and park service facilities on the shores of Lake Powell, whose 180-mile length make these populated areas a vital link to the extensive recreational boating opportunities offered by the park. Because multiple services are headquartered at these locations including, park and recreational maintenance functions, such as fueling stations, houseboat maintenance yards, and storage of hazardous materials, a variety of potential groundwater contamination sources were present. Because of the historic land uses, they also contain a number of inactive abandoned landfills and active groundwater remediation systems associated with leaking underground storage tanks.
As part of an Indefinite Delivery/Indefinite Quantity Contract with NPS for engineering services, Gannett Fleming developed drinking water source protection plans or well head protection for these public water systems operated by NPS to provide safe drinking water to staff members and park visitors.
Site reconnaissance of NPS and concessionaire areas was conducted to identify potential contaminant sources. The work included preparing utility system inventories, modeling, analysis studies, as well as plans, specifications, cost estimates, and bid documents for each project. Inspection services verified that finished construction conformed to contract documents. Our firm’s utility and utility system projects included wastewater collection, treatment and disposal, lagoon and lift station design, domestic water intake treatment and storage, water well rehabilitation, propane gas systems, and off-grid electrical systems.
- Delineation of protection zones
- Preparation of a prioritized contaminant inventory
- Assessment of each potential contaminant source
- Development of management and contingency plans for each potential contaminant source.