The Proposed Action and Alternatives
The state of Utah and Washington County has spent years vetting the project alternatives that will be evaluated as part of the federal regulatory review of the LPP. They recommend the Proposed Action as the most reliable, cost-effective and environmentally responsible alternative. Following is a recap of the Proposed Action and alternatives that will be studied.
The Proposed Action
(South Variant Alternative)
The Proposed Action is the southernmost option for constructing the LPP and mostly follows the Navajo-McCullough Transmission Line south of the Kaibab Indian Reservation. The Proposed Action includes:
• Water intake system at Lake Powell just upstream of Glen Canyon Dam to move water from the lake to the pipeline
• 140 miles of underground pipeline
• Five pumping stations to transport the water through the pipe
• Six hydroelectric facilities/electrical transmission system to produce a portion of the energy to power the pump stations and sell any excess to the grid
The South Alternative is identical to the South Variant Alternative, but the route varies in the Pioneer Gap area.
Existing Highway Alternative
The Existing Highway Alternative includes the same major components as the Proposed Action. However, a portion of the pipeline would be constructed across the Kaibab Indian Reservation following Highway 389. This pipeline alignment would be approximately 133 miles long.
Southeast Corner Alternative
The Southeast Corner Alternative includes the same major components as the Proposed Action. However, a portion of the pipeline alignment would be located parallel to the Navajo-McCullough Transmission Line across the southeast corner of the Kaibab Indian Reservation. This pipeline alignment would be approximately 137 miles long.
No Lake Powell Water Alternative
The No Lake Powell Water Alternative would develop the limited remaining surface and groundwater supplies in Washington County, permit and develop reverse osmosis treatment of existing low quality water supplies and eliminate most residential outdoor water use in the Washington County Water Conservancy District service area. It would attempt to meet the same water supply need as the LPP without relying on Lake Powell. That alternative will cost more than the Proposed Action.
No Action Alternative
The National Environmental Policy Act requires a No Action Alternative, which describes a future where none of the action alternatives are implemented. The Washington County Water Conservancy District would complete its few remaining local projects, but Washington County’s local water supply would be fully exhausted by about 2028. No additional source would be available to meet growing indoor or outdoor water demands. Water shortages would occur each year following 2028.