First volume of a final report documenting the results of an airborne radiometric and magnetic survey in a portion of Colorado and Utah, including a description of the survey methods, calibration of the systems, data processing and displays, and interpretation methods.

Second volume of a final report documenting the results of an airborne radiometric and magnetic survey, including data displays and interpretation results for the Cortez quadrangle.

Final report documenting a survey of the Durango quadrangle in Colorado as part of the Platoro Caldera detail survey. This volume outlines survey and analysis methods, and summarizes results.

This report documents a complete summary on the high sensitity airborne gamma-ray spectrometer and magnetometer survey over the Durango quadrangle.

The following report is a collection of maps documenting results from the airborne gamma-ray spectrometer and magnetometer survey in the Durango Quadrangle.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Cortez quadrangle in Colorado and Utah.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Cortez quadrangle in Colorado and Utah.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Durango Quadrangle in Colorado.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Durango quadrangle in Colorado.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Durango Quadrangle in Colorado.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Durango quadrangle in Colorado.

Summary: The motion of Rifle Gap Dam was measured in September 1969 during the Project RULISON underground nuclear explosion. The observed response was then compared with the response computed in a mathematical model. Observed and computed responses were similar. From this study it appears that the mathematical models used are applicable to the design and analysis of soil structures, at least for ground motion intensities comparable to those observed at Rifle Gap Dam. (p. xi).

From abstract: because of the increased demands for water in eastern Colorado, principally in the urbanizing Denver metropolitan area, increased diversions of water from Dillon Reservoir are planned. Estimates of end-of-month storage in Dillon Reservoir, assuming the reservoir was in place and 131,000 acre-feet of water were diverted from the reservoir each year, were reconstructed by mass balance for the 1931-77 water years. Based on the analysis, the annual maximum end-of-month drawdown below the elevation at full storage would have been 171 feet.

This report tracks and analyses the annual sediment yield for the Yampa River basin in Colorado and Wyoming. It includes maps, tables, and graphs.

This report presents the findings of the analyses made for a fifty-eight mile stretch along the Yampa River in Colorado. It contains maps, graphs, and tables.

From purpose and scope: The primary purpose of the study was to aid in evaluating the waste-load assimilative capacity of the study reach for a minimum mean 7-day low flow and 10-year recurrence interval. The results of this analysis will provide planners and managers in Routt County with information for determining the waste-load capacities of the study reach for possible design and operational alternatives of future wastewater-treatment plants.

From introduction: This report describes work done in the Denver and Greeley National Topographic Map Series (NTMS) quadrangles (1:250 000 scale) by the Los Alamos Scientific Laboratory (LASL) as part of the nationwide Hydrogeochemical and Stream Sediment Reconnaissance (HSSR).

This report provides uranium and other elemental data resulting from the Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) of the Craig quadrangle, Colorado.

From introduction: This report presents the results of an investigation of the ground-water resources of the central part of La Plata County, Colorado. The purpose of the investigation is to describe the geologic units and the availability and quality of ground water in the central part of the county.

From introduction: This report presents the results of an investigation of the ground-water resources of the Crystal River and Cattle Creek drainage basins...The purpose of the investigation was to describe the geologic units, the aquifers and their characteristics, and the availability and chemical quality of ground water in the study area.

Report of uranium findings from a reconnaissance of the Gallup NTMS quadrangle through water, sediment, and water samples collected from streams, springs, and wells.

"This report is an analysis of the various types of uranium occurrences in the Colorado Front Range and the environments in which they developed." (from Abstract)

Cw laser action has been extended down to 220 nm. Moreover, cw oscillation has been obtained on twenty additional transitions in the spectral range between 220 and 320 nm. Ultra-violet laser thresholds as low as 2 A have been observed. In comparison, rare gas ion lasers require 20 to 50 A to reach threshold. Metals of interest are sputtered into the discharge giving metal densities of 10/sup 14/ atoms cm/sup -3/ without using external ovens or discharge heating. Recent attempts to scale the output power levels to 1 W cw are presented with particular emphasis on the 780 nm transitions of Cu II and the 840 nm transitions of Ag II.

Three laser research programs are proposed: (1) to find new laser systems in the wavelength region between 2000 and 4500 A; (2) to attempt scaling lasers to high output power; and (3) to focus research on metal vapor laser systems which have promise of high efficiency. Twenty-eight new laser transitions from Cu II spanning the wavelength region from 2486 to 7988 A have been observed. A list of papers and conferences are given that summarize the metal vapor laser research. (TFD)