Snettisham Hydroelectric Project, Alaska second stage development, Crater lake. Final foundation report. Final report

Technical Report · Fri Sep 04 00:00:00 EDT 1992

OSTI ID:6806301

The important geologic features and methods used to construct the Crater Lake stage of the Snettisham Hydroelectric project, built between 1985 and 1989, are discussed. The project added 31 megawatts of non-polluting, renewable electric power for Juneau, Alaska and the surrounding area. Features of the report include the power tunnel and access adits, penstock excavation, surge shaft, gate shaft and lake top. Construction aspects include the general geology, design features, construction methods, geologic conditions encountered, ground support requirements, grouting, instrumentation and tunnel filling. Foundation conditions for the Crater Lake status were excellent, permitting the power and penstock tunnel and shafts to be constructed essentially unlined. The basic rock type throughout the project is a high-quality, quartz diorite gneiss with randomly spaced, subparallel basalt dikes.... Unlined rock tunnels, Power tunnel, Penstocks, Lake tap, Surge shaft.

• Research Organization: Lachel and Associates, Inc., Golden, CO (United States)
• OSTI ID: 6806301
• Report Number(s): AD-A-261114/3/XAB
• Country of Publication: United States
• Language: English

Related Subjects

13 HYDRO ENERGY
ALASKA
WATER RESERVOIRS
HYDROELECTRIC POWER PLANTS
CONSTRUCTION
DESIGN
BASALT
CEMENTS
CONCRETES
DIKES
ELECTRIC GENERATORS
EXCAVATION
GEOLOGIC FORMATIONS
GROUND WATER
GROUTING
HYDROELECTRIC POWER
INFORMATION RETRIEVAL
LAKES
OVERBURDEN
PENSTOCKS
POWER GENERATION
POWER RANGE 10-100 MW
QUALITY ASSURANCE
QUARTZ
REGULATIONS
RENEWABLE ENERGY SOURCES
RESEARCH PROGRAMS
SHAFTS
SOIL-STRUCTURE INTERACTIONS
SOILS
TUNNELS
BUILDING MATERIALS
DEVELOPED COUNTRIES
ELECTRIC POWER
ENERGY SOURCES
GEOLOGIC STRUCTURES
HYDROGEN COMPOUNDS
IGNEOUS ROCKS
MACHINE PARTS
MATERIALS
MEGAWATT POWER RANGE
MINERALS
NORTH AMERICA
OXIDE MINERALS
OXYGEN COMPOUNDS
PIPES
POWER
POWER PLANTS
POWER RANGE
ROCKS
SURFACE WATERS
UNDERGROUND FACILITIES
USA
VOLCANIC ROCKS
WATER
130100* - Hydro Energy- Resources & Availability
130200 - Hydro Energy- Site Geology & Meteorology
130300 - Hydro Energy- Plant Design & Operation