| OCR Text |
Show total installed capacity at 31 Federal hydroelectric plants in the Columbia River Basin to about 13.1 million kilowatts, with average annual genera- tion of approximately 75 billion kilowatt-hours. The total active storage capacity available would be about 25 million acre-feet. Total annual gen- eration of all plants, public and private, would be 80 billion kilowatt-hours. The data available for future prospective power developments indicate over 300 potential power development sites. These potential projects could provide an additional installed capacity of at least 20 million kilowatts with average annual genera- tion of 87 billion or more kilowatt-hours. If to these totals are added the previous totals, the total hydroelectric potentiality of the Columbia River Basin in the United States would amount to 34 mil- lion kilowatts of installed capacity, average annual generation of approximately 168 billion kilowatt- hours, and a total potential water storage capacity of 75 million acre-feet. In addition to the foregoing totals, there are potential reservoir sites in the Canadian portion of the basin capable of providing at least 20 million acre-feet of new usable storage capacity. This capacity would afford substantial benefits to exist- ing and potential hydroelectric power projects in the United States portion of the basin. Navigation A total of 23 projects involving navigation im- provements has been authorized for the Columbia River system. Detroit is under construction at pres- ent. Six of these are single-purpose projects for the improvement of navigation. Of these single- purpose projects, four involve clearing channels on parts of the lower Columbia, Willamette, and Snake Rivers, one involves clearing shoals in Umatilla Harbor, and the last is a new lock and fish ladder at Willamette Falls. Most navigation projects are multiple-purpose. These are: Priest Rapids, John Day, The Dalles, Lower Granite, Little Goose, Lower Monumental, and Ice Harbor Projects on the Columbia and Snake Rivers; and Libby on the Kootenai River. Hills Creek, Fall Creek, Cougar, Blue River, Wiley Creek, and Gate Creek will give navigation benefits on the Willamette system. Cascadia and Green Peter Dams on the South Santiam, and Holley Dam on the Calapooya will also assist navigation on the Willamette. The total cost of this program is approximately 2 billion dollars, but only a small fraction of this cost is allocated to navigation. Data on some of the reservoir projects are incomplete. The completion of the authorized projects will extend slack water navigation up the Columbia River to the head of the McNary pool, up the Snake River to Lewiston, Idaho, and above there by open river navigation to Lime Point, Idaho. Navigability of the Willamette River will be im- proved to the present head of navigation at Harris- burg, Oreg. The Corps of Engineers review report of the Columbia River and tributaries recommended as a third element of a navigation plan, improvements of six harbor sites on the lower Snake River ($500,000) and of 15 sites on the lower Columbia ($1,860,000). Construction of channel improve- ments to Lime Point, Idaho, 30 miles above Lewis- ton, also is recommended. Flood Protection Flood control projects under construction con- sist of channel improvement and local protective works at two locations in the upper Columbia Basin and a group of 14 clearing and bank protec- tion works on the Willamette system. Lucky Peak Reservoir on the Boise River, a tributary of Snake River in Idaho, is under construction for flood control and irrigation. Two multiple-purpose reservoirs in the Willamette River Basin (Lookout Point and Detroit) include flood control features. Hungry Horse Dam will provide the first large upstream flood control storage (3 million acre-feet). The local flood protection projects authorized but not yet under construction number 15 in total. Of these, three are improvements of existing levee and drainage district works along the lower Colum- bia; six are in upper tributary basins, and the re- maining six are in the Willamette Basin. The last includes two extensive programs of channel clear- ing, snagging, and bank protection. Of the 13 reservoirs that provide flood protection benefits nine are on the Willamette River system. These are: Hills Creek, Fall Creek, Cougar, Blue River, Gate Creek, Cascadia, Green Peter, Wiley Creek, and Holley. Priest Rapids and John Day 911610-51- 19 |
