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<br />PROGRESS ON CONSTRUCTION
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<br />
<br />BUREAU OF RECLAMATION
<br />
<br />Although Yellowtail Dam, on the Bighorn River in Montana, was com-
<br />pleted and its total power production potential came on the line during
<br />fiscal year 1967, adequate visitor facilities were not yet available.
<br />During fiscal year 1968 the Yellowtail Visitor Center and additional
<br />parking and access roads were completed. Work continued on day-use
<br />facilities and boat launching ramps at several locations.
<br />
<br />Construction activity remained at a high pitch throughout the year
<br />on the Glen Elder Dam on the Solomon River in north-central Kansas. By
<br />years' end work on the Dam had reached 96 percent completion and work
<br />was well underway on clearing Waconda Lake area and on the construction
<br />of some five boat ramps along the lakeshore.
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<br />Fiscal year 1968 saw important progress too, in North Dakota, as
<br />work started on several important aspects of the huge Garrison Diversion
<br />Unit. During May 1968, bids were received on construction of the Snake
<br />Creek Pumping Plant No. 1 and a construction contract was awarded in
<br />mid-July. By years' end work was well along on buildings and facilities
<br />for the O&M headquarters at Oakes, North Dakota, as well as radio commu-
<br />nications facilities for the Unit.
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<br />Noteworthy too was the start of construction on the. first extra-
<br />high-voltage transmission line to be constructed by the Bureau of
<br />Reclamation in the Missouri River Basin. By mid-June construction work
<br />was underway on two contracts calling for construction of 242 miles of
<br />345-kv transmission line between Grand Island, Nebraska, and Fort
<br />Thompson in South Dakota.
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<br />The existing transmission system was subjected to one of its most
<br />severe tests in late June as severe winds battered the system in the
<br />Dakotas.
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<br />Within a period of about three hours, structures were destroyed on
<br />the Oahe-Glenham and Utica Junction-Sioux Falls 230-kv lines, the Fort
<br />Thompson-Fort Randall 230-kv line, the Watertown-Brookings l15-kv line,
<br />and the Mount Vernon-Armour l15-kv lines were destroyed by winds which
<br />exceeded 100 miles per hour. Replacement costs are estimated to exceed
<br />$-\ million.
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<br />Coincidentally with the devastating windstorm, a transformer failure
<br />at the Tyndall Substation resulted in the only extended interruption of
<br />service. All other service was restored within a short time by isolating
<br />the damaged sections of line.
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