52 x 46 cm. "Map no. 23000." Shows reservoir sites, irrigated areas, power plants, power sites, dam sites, national parks or monuments, and diversion from basin. Colorado River Basin/Department of the Interior, Bureau of Reclamation; John H. Pellen, chief draftsman. Original publisher: United States. Bureau of Reclamation.

Additions to pavilion building, Zion National Park, Utah. North and south exterior elevations, various interior elevations, numerous details, sections, plans and loading and stress diagrams for additions to the pavilion building at Zion National Park, Utah. Scales as shown. "Dr. by D.A.E., R.R.C., W.L.H. " "#15782-F. Sheet no. 6. Job no. 348. Date: 12/12/25." "Recommended by D.R. Hull per T.C. Unit, Landscape Eng. N.P.S. Approved by Stephen T. Mather, Director, N.P.S." "Rev. 1/11/26, 2/2/26, 3/2/26."
Site Name: Zion National Park (Utah)

Latest Drawing Revision: 1926-03-02

Black and white image of the group of men who witnessed the pouring of the first concrete in Hoover Dam proper. From left to right: H. J. Lawler, Director of Six Companies, Inc.; Walker R. Young, Construction Engineer, U.S. Bureau of Reclamation; Frank T. Crowe, General Superintendent, Six Companies, Inc.; C. A. Shea, Director of Construction, Six Companies, Inc. W. A. Bechtel, President, Six Companies, Inc.; R. F. Walter, Chief Engineer, U.S. Bureau of Reclamation; Theodore A. Walters, First Assistant Secretary of the Interior ; Ed Clark & C. P. Squires, members of the original Colorado River Commission. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Typed, itemized estimate of costs for a four room cottage to be built within Clark's Las Vegas Townsite. Document includes item description, material cost, labor cost and total costs for construction and freight. The railroad cottages were built by the Las Vegas Land and Water Company for employees of the San Pedro, Los Angeles and Salt Lake Railroad between 1909 and 1911.