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Last modified
7/29/2009 8:16:32 AM
Creation date
10/9/2006 3:52:02 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8408
Description
Platte River Basin-River Basin General Correspondence
State
CO
Date
6/1/1952
Author
BOR
Title
Bonny Dam-Bonny Dam Dedication Ceremony
Water Supply Pro - Doc Type
Report/Study
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<br /> <br />, I <br /> <br />r <br /> <br />. <br /> <br />. <br /> <br />concerned itself primarily with the excavation of borrow material and the <br />placement of dam embanlanent. Most of the other work was subcontracted. <br />The concrete work was subcontracted by Horner and avitliier, Denver, Colorado, <br />and nlne other contractors had a part in the construction of the dam and <br />access road. The maximum number of contractor's and suboontractor's <br />employees was 497 in November 1949. <br />During the first full year (1949) of construction, the Utah Qmstrue- <br />tion Company accomplished 43 percent of the contz:act work on what was <br />scheduled to be a four-year job. In so doing, they established several <br />new records for earth work on Bureau of Reclamation projects, excavating <br />over 1,000,Oeo cubic yards of material a month for four consecutive months, <br />with a maximum of 1,334,000 cubic yards in November, and placing over <br />1,043,000 cubic yards of embankment material in the month of November. <br />The first load of earth fill material was dumped on the dam in March 1949 <br />and the last load in November 19$0. <br />Actual placement of concrete for the spillway and outlet work a was <br />begun in June 1949 and these structures were completed in October 195<>. <br />For the protection of the upstream face of the dam, a layer of rock rip.. <br />rap three feet thick over a crushed rock or gravel blanket 18 inches <br />thick was placed up to three feet above the normal reservoir water surface. <br />hOD! that point to the top of the dam, the riprap and gravel blanket <br />diminish in thickness to two feet and one foot respectively. Protection <br />of the downstream slope of the dam was provided by seeding the topsoil- <br />covered embankment with a mixture of crested and western wheatgrass, <br />biennial yellOW sweet clover, and barley. <br />Reservoir clearing operations, done under con tract, were completed in <br />Z 4 ~ril 19$0, and storage of water in the reservoir was begun in July of that <br /> <br />4 <br />
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