Hydrologic Safety of Earth Dams
Hydrologic and hydraulic analyses are presented pertaining to the safety evaluation of an earth dam located downstream of another smaller earth dam. The upper dam is assumed to breach...
Surgery in the Microgravity Environment
As man becomes more active in space, the possibility of major medical emergencies requiring surgical procedures will increase. Surgery in the microgravity environment involves many challenges...
Solutions to Space Station Designs
Any space station that is to be designed for extended human use may require gravity. The artificial gravity field required can be produced by rotating the structure. As the Soviets have...
Lessons from Dam Incidents. US-II
The purpose of this report is to present available data to the profession regarding failures, accidents, and major repairs at dams in the United States. Data is analyzed with respect to...
Long Distance Dam Data
Remote data collection systems are increasingly being used for dams. Instrumentation of structures for obtaining data on performance is not new. However, automation and computerization...
Leakproofing an RCC dam
A roller compacted concrete dam, Stacy Dam in Texas, is described and several methods of preventing leakage are mentioned. Reinforced concrete facings, placed after RCC completion, was...
Seismic Cutoff
The John Hart Dam, which is a 40-year old dam in British Vancouver, Canada, has been rehabilitated to meet current seismic codes. BC Hydro, the utility that owns the dam, conducted a study...
Conjunctive Use in the Niles Cone, California
The use of in-stream facilities for artificial recharge in stream channels as practiced in Alameda County, California, is discussed. The facilities are (1) stream channels with no other...
Techniques of Artificial Recharge from an Ephemeral Wadi Channel Under Extreme Arid Conditions
A series of field experiments and theoretical analysis was carried out for the alluvial system in Wadi Tabalah in order to determine the feasibility of implementing artificial recharge...
Review of the Nation's Water Resources Infrastructure Needs
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Barge Bottleneck Uncorked
Construction of the replacement Lock & Dam 26, on Mississippi River at Alton, Ill. near St. Louis, is described. The $1 billion job, programmed to be built over the period 1979-91,...
Earthquake Response of La Villita Dam
Due to the recent industrial and housing developments at the port of Lazaro Cardenas, located 13 km (8 miles) downstream of La Villita Dam, at the mouth of the Balsas River, the hazard...
Stopping Seepage
The Navajo Dam in New Mexico has major seepage problems. The Bureau of Reclamation, which owns the Dam, conducted studies, verified by outside consultants, concluding that the combination...
Risky Waters
Risk assessment is a tool engineers use to clarify the impact and issues associated with various choices and perspectives. Because problems and projects related to water have such a significant...
Erosion of the Slopes of Gold Tailings Dams
A study has been made of rates of erosion from the slopes of gold-residue dams in the South African Highveld region. Data is available for two years at this time and conclusions must therefore...
Embankment Over Fly Ash Pond at Portsmouth Power Station
The fly ash and bottom ash sediments from the Portsmouth Power Station in Portsmouth, Virginia were being sluiced into a 39 acre diked ash pond near the plant. The plant was about to convert...
Aids for the Hazard Classification of Small Dams
The last few years have seen a large growth in the tools available to the engineer to better determine the risk of failure in earth dams. One of the models developed is the National Weather...
Stepped Spillway Design with a RCC Dam
The hydraulic model study results for the Upper Stillwater stepped spillway design are presented. The studies encompassed several spillway geometries and design unit discharges ranging...
Hydraulic Design Limitations for Gravity Flexible (Non-Rigid) Plastic Pipes Flowing with a Free Water Surface
Hydraulic design limitations are necessary for gravity plastic pipes when designed for use as a sanitary sewer, flowing part full with a free water surface. The limitation for pipes designed...
Dam Safety Improvements for Tolt River Dam
Studies were performed to identify measures to improve the safety of the project under earthquake and extreme flood conditions while permitting the owner to store additional water under...
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