Show Geologists study Duchesne j earthquake damage Bureau Dureau of Reclamation Project Manager tanager John W W. Jensen en announced this week that Regional geologists have surveyed cracks reportedly caused by the September 30 and October 11 Il earthquakes that were found on the south flank nank of the Uinta Mountains They occur about four miles downstream downstream downstream down down- stream from the Moon Lake Dam and Reservoir and near the upper end of Reclamations Reclamation's proposed Reservoir planned as the major feature of the Upalco Unit of the Central Utah Project Mr Jensen Jenen emphasized that the cracks do not In any way relate to or affect the Moon Lake facility which as been carefully examined BUREAU GEOLOGISTS reported four vertical near-vertical cracks as wide as 6 Inches in a zone about 30 feet wide and feet long trending in a northwesterly northwesterly nor nor- direction The disruption was apparently quite localized The cracks which taper downward to a depth of 10 feet are only in the shallow alluvial surface layers No fissures were found in the shale bedrock surface at a depth of about 12 feet Extensive site investigations including exploratory drilling now underway at the proposed Dam and Reservoir site on the Lake Fork River must be performed before befort final designs are made S is among the factors to be fully evaluated by byRe R e Reclamation l i mat on planners and designers when final consideration is given to the design and selection of a site for Dam Advance planning of the Upalco Unit is now underway The unit is planned to provide supplemental irrigation water for about acres of Indian and non-Indian non lands along the Lake 1 Fork ork River The Upalco Unit will also include some municipal and industrial water and benefit recreation fish and wildlife and flood control Dam Damand Damand Damand and Reservoir the major feature of the Unit will store flows of Lake Fork and Yellowstone Rivers |