Author: United States. Department of the Army
Publisher:
ISBN:
Category : Arlington National Cemetery (Va.)
Languages : en
Pages : 24
Book Description
Army National
Author: United States. Department of the Army
Publisher:
ISBN:
Category : Arlington National Cemetery (Va.)
Languages : en
Pages : 24
Book Description
Publisher:
ISBN:
Category : Arlington National Cemetery (Va.)
Languages : en
Pages : 24
Book Description
The Code of the District of Columbia (to March 4, 1929) ...
Author: District of Columbia
Publisher:
ISBN:
Category : Law
Languages : en
Pages : 154
Book Description
Publisher:
ISBN:
Category : Law
Languages : en
Pages : 154
Book Description
John Day Lock and Dam, Columbia River, Washington and Oregon
Author:
Publisher:
ISBN:
Category : Dams
Languages : en
Pages : 82
Book Description
Publisher:
ISBN:
Category : Dams
Languages : en
Pages : 82
Book Description
General Letter Report
Author: United States. Army. Corps of Engineers. Portland District
Publisher:
ISBN:
Category : Fishways
Languages : en
Pages : 212
Book Description
Publisher:
ISBN:
Category : Fishways
Languages : en
Pages : 212
Book Description
John Day Dam, Columbia River, Washington and Oregon
Author: United States. Engineers Corps
Publisher:
ISBN:
Category : John Day Dam (Or. and Wash.)
Languages : en
Pages : 44
Book Description
Publisher:
ISBN:
Category : John Day Dam (Or. and Wash.)
Languages : en
Pages : 44
Book Description
Ice Harbor Lock and Dam Lake Sacajawea, Washington. Feature Design Memorandum Number 34 - Spillway Deflectors
Author:
Publisher:
ISBN: 9781423575085
Category :
Languages : en
Pages : 282
Book Description
River flows passed through the spillways of the dams located on the lower Columbia and lower Snake Rivers produce water that is supersaturated with dissolved gases. These high levels of dissolved gases are detrimental to aquatic life. In the 1970's, spillway deflectors were installed on the spillways of several U.S. Army Corps of Engineers' projects (Bonneville, McNary, Lower Monumental, Little Goose, and Lower Granite Dams) to reduce the high levels of total dissolved gas (TDG) produced. However, in 1976, it was decided to postpone the construction of deflectors at Ice Harbor Dam. Key fishery researchers of that time judged that spillway deflectors at Ice Harbor Dam would cause poor hydraulic conditions in the tailrace that would likely delay or block adult fish passage. Also, the severity and frequency of TDG supersaturation downstream of Ice Harbor Dam was expected to be reduced significantly in the near future because of several factors. These factors included: (1) the recent completion of all six powerhouse turbines at Ice Harbor Dam, which would significantly reduce the amount of spill discharge required during periods of high flow; (2) the recently completed Dworshak Dam, having 3 million acre feet of active flood control storage, which would also reduce the amount of spill required at Ice Harbor Dam due to high flows; and (3) the installation of spillway deflectors and the accelerated schedule for turbine installation at the three lower Snake River dams upstream of Ice Harbor Dam, which would reduce the frequency and level of TDG entering the forebay of Ice Harbor Dam in the near future. This reduction of TDG in the forebay was expected to reduce, to some extent, the level of TDG downstream of Ice Harbor Dam as well. Operation of Ice Harbor Dam has changedh-IS)GT*GD,G9>G-* (DES(
Publisher:
ISBN: 9781423575085
Category :
Languages : en
Pages : 282
Book Description
River flows passed through the spillways of the dams located on the lower Columbia and lower Snake Rivers produce water that is supersaturated with dissolved gases. These high levels of dissolved gases are detrimental to aquatic life. In the 1970's, spillway deflectors were installed on the spillways of several U.S. Army Corps of Engineers' projects (Bonneville, McNary, Lower Monumental, Little Goose, and Lower Granite Dams) to reduce the high levels of total dissolved gas (TDG) produced. However, in 1976, it was decided to postpone the construction of deflectors at Ice Harbor Dam. Key fishery researchers of that time judged that spillway deflectors at Ice Harbor Dam would cause poor hydraulic conditions in the tailrace that would likely delay or block adult fish passage. Also, the severity and frequency of TDG supersaturation downstream of Ice Harbor Dam was expected to be reduced significantly in the near future because of several factors. These factors included: (1) the recent completion of all six powerhouse turbines at Ice Harbor Dam, which would significantly reduce the amount of spill discharge required during periods of high flow; (2) the recently completed Dworshak Dam, having 3 million acre feet of active flood control storage, which would also reduce the amount of spill required at Ice Harbor Dam due to high flows; and (3) the installation of spillway deflectors and the accelerated schedule for turbine installation at the three lower Snake River dams upstream of Ice Harbor Dam, which would reduce the frequency and level of TDG entering the forebay of Ice Harbor Dam in the near future. This reduction of TDG in the forebay was expected to reduce, to some extent, the level of TDG downstream of Ice Harbor Dam as well. Operation of Ice Harbor Dam has changedh-IS)GT*GD,G9>G-* (DES(