Twin Falls Mitigation Plan: Long Term Monitoring of Fish Populations
A fishery monitoring and enhancement plan has been worked out for the Twin Falls Hydroelectric Project which diverts water from a one mile reach of the South Fork Snoqualmie River in Washington...
A Water Budget Approach to Instream Flow Maintenance
Storage reallocation is a current issue at many Federal water storage facilities that have hydroelectric generation. Allocation of storage to support instream flows is one of the changes...
Instream Flow Needs Below Peaking Hydroelectric Projects
A method has been developed to assist in the determination of instream flow needs below hydroelectric projects operated in a peaking mode. Peaking hydroelectric projects significantly...
Pumped Storage, the Environment and Mitigation
The privately financed 1,000 MW Rocky Point Pumped Storage Project located in central Colorado, USA, will be one of the world's highest head, 2,350 feet (716 m), reversible...
Harvest Facility Protects and Improves Fishery
By constructing a trap and transfer/harvest facility to control anadromous fish migration, the trout fishery on the Boardman River was protected and the salmon fishery was improved. The...
Case Study: Central Oregon Siphon Power Project Mitigating Local Concerns
In the early 1980's, 18 hydroelectric projects were proposed for development on the Deschutes River system in Central Oregon. Strong local opposition was a major factor in...
North Fork Feather River Erosion Control Program
PG&E, an investor owned gas and electric utility serving northern and central California, has been engaged since 1984 in the development and implementation of a regional erosion...
Review of Mitigation Methods for Fish Passage, Instream Flows, and Water Quality
Current environmental mitigation practices at nonfederal hydropower projects were analyzed. Information was obtained from project operators on dissolved oxygen (DO) mitigation, instream...
Hydrogen Sulfide in Hydropower Reservoirs
Hydrogen sulfide is toxic to aquatic life and corrosive to construction materials at concentrations that are considerably lower than detection limits of analytical procedures commonly...
Factors Affecting Dissolved Oxygen in Hydropower Reservoirs
Dissolved oxygen (DO) is becoming a significant issue for hydropower projects. This paper identifies some key factors that can help hydropower operators better understand the nature of...
Side Effect of the Cross-Flow Turbine: Improved Water Quality
The working principle of the Original Cross-Flow Turbine with draft tube demands air induced into the turbine housing to operate at high efficiency. Reoxygenation of water will occur,...
The Gloryhole Approach to Increasing Dissolved Oxygen Content
Deep intakes at hydroelectric dams in southern states withdraw water that is oxygen deficient during summer months when reservoirs become stratified. The 'Gloryhole'...
Distribution and Grain Sizes of Deposited Reservoir Sediments, Seventy Years after Dam Construction
The Elwha and Glines Canyon Hydroelectric Projects are located on the Elwha River in the northwest portion of the Olympic Peninsula in Washington State. The Elwha Dam was completed in...
Mercury in Fish and Water in New Impoundments?A Review of the Literature
Evidence to date indicates that only one metal, mercury, systematically bioaccumulates to ecologically significant concentrations as a direct result of impoundment. This bioaccumulation...
Glen Canyon Hydropower vs. The Grand Canyon (The Conflict of Basic Values)
Competing for the scarce resources of our future is the byword of the 1990's. For the last century and more, the United States has been in the position of always having more...
Balancing Power Production with Natural Resource Benefits: Can You Trade Apples for Oranges?
Recent legislation affecting the licensing of hydropower projects requires that equal consideration be given to power and nonpower resource values. As is the case for past attempts to...
The Impact of No Net Loss of Wetlands on Water Power Development Alternatives
Federal commitment to wetlands protection is increasing. The Bush Administration has embraced an as yet undefined goal of 'no net loss of wetlands' and various...
Relative Survival of Juvenile Chinook Salmon Through Bonneville Dam on the Columbia River
Preliminary results of a multiple year study indicate that juvenile chinook salmon passing through the juvenile bypass system at Bonneville Dam second powerhouse during the summer have...
Effects of Hydroelectric Turbine Passage on Fish Early Life Stages
Turbine-passage mortality has been studied extensively for juveniles and adults of migratory fish species, but few studies have directly quantified mortality of fish eggs and larvae. An...
Fish Entrainment and Mortality at the French Landing Hydroelectric Powerhouse
This case study explains the fish mortality study performed and results obtained at an existing hydroelectric powerhouse in Michigan. Undertaken in 1989 and 1990, this study provides data...
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