Various2018-05-312018-05-311951TRA-059-04-001http://hdl.handle.net/20.500.11867/770914 page typed transcription, created by Click Relander."Topographic: Entails head of waterfall storage, width between abutments at dam site which have influence on type of structure of the dam. Ordinarily a fairly wide valley, such as at P. R. or on the lower Columbia, the spillway and power house are concrete and the rest of some impervious type earth."NO KNOWN COPYRIGHT The organization that has made the Item available reasonably believes that the Item is not restricted by copyright or related rights, but a conclusive determination could not be made. Please refer to the organization that has made the Item available for more information. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use.