Postcard image of "Echo Lake Lodge Colo. In Spring, Alt. 10,628 Ft. as written in bottom left corner in white. The two and a half story log lodge has a hexagonal shaped wing (facing camera) with a rectangular wing near left side of photo. The covered area to right bears the sign "Echo Lake Lodge". Snow covered grounds in foreground. Snow and tree topped mountains in background. Back of photo in black: "Post Card Correspondence Address A Z O [written in a square with black squares at each corner] Place Stamp Here [written inside of square]"

Postcard image of "Echo Lake Lodge Colo. In Spring, Alt. 10,628 Ft. as written in bottom left corner in white. The two and a half story log lodge has a hexagonal shaped wing (facing camera) with a rectangular wing near left side of photo. The covered area to right bears the sign "Echo Lake Lodge". Snow covered grounds in foreground. Snow and tree topped mountains in background. Back of photo in black: "Post Card Correspondence Address A Z O [written in a square with black squares at each corner] Place Stamp Here [written inside of square]"

Postcard image of " 'Echo Lake Lodge In May' Colo." as written in white near bottom left of postcard. The image is of a two story painted building with white trim. Snow in foreground has several structures nearly covered. Tall trees in front of the lodge and on the hillside in the background. Black text on back reads: "Post Card Correspondence Address D O P S [printed in the corners of a dotted line square] Place Stamp Here [written in the square].

Postcard image of a "Glimpse Of Mt. Evans At. 14,260 Ft. From Chicago Creek Road" as written in white at bottom of postcard. Image shows a winding road that disappears from view amid tall trees and mountains. Mountains in background. Black text on back of postcard reads: "Post Card Correspondence Address D O P S [written in corners of a dotted line square] Place Stamp Here [written inside of square].

Photograph of The Loop, a railroad track in Georgetown, Colorado.

From introduction: The Martha E prospect, in Spring Gulch about three and one-half miles southwest of Idaho Springs, Colo. (fig. 1), is on a claim, originally called the Daisy Freese, which was first prospected by the Stanley Mines. The occurrence of radioactive minerals in the adit was called to the attention of the U. S. Geological Survey in 1950 by the owners of the claim. The Survey's Trace Elements Section Washington Laboratory identified metatorbernite, autunite, and sooty pitchblende.

From abstract: Eight tons of high grade pitchblende ore was sold from the Jo Reynolds mine near Lawson, Clear Creek County, Colo., in 1919. The pitchblende occurs with silver, lead, and zinc in carbonate-quartz veins cutting pre-Cambrian schist, granite gneiss, and granite.

From abstract: Pitchblende is known to occur in the Jo Reynolds deposit, which was primarily a lead-zinc-silver ore body. The reported production in 1919 of 8 tons of high-grade uranium ore, presumably from the lowest workings of the mine, is still unconfirmed but has a fair degree of credibility.

Report discussing the geology and numerous ore deposits of the Chicago Creek area in Clear Creek County, Colorado. Prior to this report, gold, silver, copper, lead, zinc, and uranium were produced from this area.

Report discussing an investigation of radioactivity in part of Clear Creek County, Front Range, Colorado. The methods and results of the reconnaissance are included. Veins containing chalcopyrite were found to be the best source of radioactivity in the region.

Report containing geologic and vein maps for part of the Central City District, Colorado. Tables containing Shafts and adits in the area are included.

Report discussing the results of a geological study of the Idaho Springs-Central City area of the Front Range mineral belt. The study was still in progress at the time of publication.

Interview with Harold L. Trammell, a member of the Civilian Conservation Corps from Mason, Oklahoma. Trammell discusses his early life, train hopping to Utah and back, enrollment in the CCC at Fort Sill, his assignment to Cache, Oklahoma, building trails in the Wichita Mountains Wildlife Refuge, work at Arapaho National Forest in Colorado, pranks in camp, daily routine, entertainment and recreation, drinking, discipline, and life after the CCC. In appendix is a copy of Trammell's account of his time in the CCC, and the May 30th, 1935 edition of the CCC magazine "Panther Tracks."

"The purpose of the reconnaissance was to determine the distribution and the economic importance of the radioactive occurrences of the region. The methods, as well as the results, of the investigation, are given in this report."

A report regarding a geological survey of the geology and ore deposits of the Freeland-Lamartine District, Clear Creek County, Colorado. Concerns work done on behalf of the Division of Raw Materials of the U.S. Atomic Energy Commission.

This report describes the Fall River Area that was examined for favorable areas between known occurrences of pitchblende at Quartz Hill and at Lawson.