passionzuloo.blogg.se - Key words rock cycles uc approval

#KEY WORDS ROCK CYCLES UC APPROVAL PDF#
#KEY WORDS ROCK CYCLES UC APPROVAL FULL#

DOI, through Reclamation and NPS, has determined these alternatives represent a reasonable range of options that may meet the purpose, need, and objectives (as described below) of the proposed action.

#KEY WORDS ROCK CYCLES UC APPROVAL FULL#

The alternatives addressed in this EIS include a broad range of operations and experimental actions that together allow for a full evaluation of possible impacts of the proposed action. In addition, the EIS identifies and analyzes the environmental issues and consequences associated with taking no action, as well as a reasonable range of alternatives to no action for implementing the proposed federal action. The LTEMP Environmental Impact Statement (EIS) has been prepared to identify the potential environmental effects of implementing the proposed federal action. The LTEMP would determine specific options for dam operations, non-flow actions, and appropriate experimental and management actions that will meet the GCPA’s requirements and minimize impacts on resources within the area impacted by dam operations, commonly referred to as the Colorado River Ecosystem,1 including those of importance to American Indian Tribes. The LTEMP would provide a framework for adaptively managing Glen Canyon Dam operations over the next 20 years consistent with the Grand Canyon Protection Act of 1992 (GCPA) and other provisions of applicable federal law. Department of the Interior (DOI), through the Bureau of Reclamation (Reclamation) and National Park Service (NPS) proposes to develop and implement a LongTerm Experimental and Management Plan for operations of Glen Canyon Dam, the largest unit of the Colorado River Storage Project (CRSP). Long-Term Experimental and Management Plan

#KEY WORDS ROCK CYCLES UC APPROVAL PDF#

HFE Spring 2023 Notification Letter Link is to a PDF file.

Notification of Decision to Implement a Spring Flow Experiment at Glen Canyon Dam Link is to a PDF file.

Visitors to the river are highly encouraged to view visit the National Parks Service website for additional safety information and flow release patterns: This experiment will only rearrange water released in April and will not affect volumes released in other months.ĭue to the high flows being released during the experiment, sudden changes to river conditions will occur and recreationists along the Colorado River between Glen Canyon and Lake Mead are urged to use caution during implementation. Flow experiments like this one at Glen Canyon Dam do not change the total annual volume of water released from Lake Powell to Lake Mead. Hourly releases during April are scheduled to fluctuate from a low of approximately 8,033 cfs during the early morning hours to a high of 14,631 cfs during the afternoon and evening hours in days preceding and following the release. Because of the increased snowpack throughout March in the upper basin and subsequent inflow projections increasing from 125% of average to 177% of average, Reclamation recently increased the release volume from Glen Canyon Dam to 910,000 acre-feet. The Grand Canyon Monitoring and Research Center and the National Park Service will monitor effects to many resources, including but not limited to beaches, fisheries, aquatic insects, and archaeological sites.Īpril flows will be much higher and will continue for the remainder of the water year. Releases like this one are experimental in nature and are designed to achieve a better understanding of how and when to incorporate them into future dam operations in a manner that maintains or improves beaches, sandbars, and associated habitats. Rebuilding beaches and sandbars in the Grand Canyon also protects archaeological sites and provides other resource benefits.

This experiment will mobilize and redeposit sand to rebuild beaches throughout the Grand Canyon. This will be the first spring release implemented under the protocol. Five HFEs have been conducted since the High Flow Experiment (HFE) Protocol was initiated in 2012.

High sediment loads in Marble Canyon and favorable hydrology conditions are present to support a spring experiment based on the analysis considered under the Long-Term Experimental and Management Plan, which allows for high-volume dam releases for sediment conservation. Water releases from the dam during the 3-day spring flow experiment will be as high as 39,500 cubic feet per second (cfs). Reclamation will release a high flow at Glen Canyon Dam during a 72-hour experiment between April 24-27.