From abstract: This report provides "hydrologic information for the north-central and western coal-mining regions of Missouri . . . to define the hydrologic system in these areas of major historic and planned coal development." It "describes the physical setting, climate, coal-mining practices, general hydrologic systems, and the current (1980) hydrologic data base in these two coal-mining regions."

Abstract: The primary effect of a floodwater-retarding structure (FRS) on the flow of Trout Creek, Wisconsin, is attenuation of flood peaks. Reduction of flood peaks ranged from 58 to 91 percent during the study period, 1975 to 1979. An inverse relationship exists between sediment concentration and outflow from the FRS during floods. Most sediment stored in the flood pool during floods is released from the reservoir during subsequent reduced discharge. Sediment-trapping efficiency of the FRS was 7 percent during the 4-year study. The bankfull capacity of the channel was reduced from 154 cubic feet per second upstream from the FRS to 65 cubic feet per second downstream. Mean bankfull depth downstream from the FRS has adjusted to a value 45 percent less than upstream from the structure due to the sedimentation of materials transported from the FRS during reduced flows. The FRS was not found to have any significant adverse effect on the arthropod fauna or trout reproduction in Trout Creek from 1975 to 1979. During 1960-1979, winter floods seem to have had the greatest adverse effect on the survival of brown trout eggs and sac fry.

From introduction: The purpose of this report is to describe the general quality and quantity of water in the principal water-supply aquifers in Minnesota.

This report analyses resistivity and porosity logs to determine water-quality trends in carbonate aquifers. It contains tables and other figures.

This report uses data collected from seventeen lakes and ponds in Eagan, Minnesota from 1972 through 1978 to determine the effects of urbanization on water quality. It contains a map, graphs, and tables.

Samples of water, fish, and benthic macroinvertebrates collected at 10 sampling stations over a 10-month period indicate that Sacony Creek and its major tributaries possess water of good to excellent quality. No excessive quantities of dissolved nutrients, oxidizable matter, or fecal coliform bacteria were detected. Fish inhabitants include a sizable wild trout population in the upper Sacony basin and a diverse warm-water population, dominated by white suckers (Catostomus commersoni), in the lower basin. A population of 590 trout or 119 pounds per acre (133 kilograms per square hectometer) was estimated for good habitat in the upper basin. A maximum standing crop of 558 pounds per acre (626 kilograms per square hectometer) was measured at' one of the more productive reaches. Benthic macroinvertebrate collections tended to support the water chemistry and fish population studies. Diversity (d) and Redundancy (r) ranged from 2.44 to 3.46 and 0.14 to 0.38, respectively. Such diversity and redundancy values indicate good quality water at all stations.

From abstract: This report "presents PHREEQE, a Fortran IV computer program designed to mode1 geochemical reactions and calculate pH, redox potential, and mass transfer as a function of reaction progress. "It contains tables and other figures.

This report presents the results of water sampling in two New York counties and concludes that the possibly cause of fluctuations of chloride, sulfate, and nitrate in the water are "precipitation, lawn fertilizer, dissolved salts from storm runoff, and effluent from septic tanks and cesspools." This report also includes a number of maps and graphs.

From introduction: The objective of this project is to measure the impact coal mining has on the hydrologic system and to develop the capability for predicting the effect of future mining on water resources. To achieve this necessities isolating the problems and measuring the parameters involved before, during, and after mining.

This is a scale 1:24,000 photogeologic map of Circle Cliffs-2 Quadrangle in Garfield County, Utah.

This is a scale 1:24,000 photogeologic map of Mt. Peale-1 Quadrangle in Grand and San Juan Counties, Utah, and Montrose County, Colorado.

This is a photogeologic map, scale 1:24,000, of Stinking Spring Creek-8 in Emery County, Utah.

This is a photogeologic map, scale 1:24,000, of Tidwell-4 in Emery County, Utah.

This is a photogeologic map, scale 1:24,000, of the Colorado Plateau Area, Desert Lake-11, Emery County, Utah.

This is a photogeologic map, scale 1:24,000, of Colorado Plateau Area, Woodside-13, in Emery County, Utah.

This is a photogeologic map, scale 1:24,000, of Colorado Plateau Area, Tidwell-9, in Emery and Grand Counties, Utah.

This is a photogeologic map, scale 1:24,000, of the Colorado Plateau Area, Kaiparowitz Peak-9, Garfield County, Utah.

This is a photogeologic map, scale 1:24,000, of the Colorado Plateau Area, Circle Cliffs-4, in Garfield County, Utah.

This is a photogeologic map of the Colorado Plateau Area on the Navajo Indian Reservation, Navajo Mountain-9, San Juan County, Utah, scale 1:24,000.

This is a photogeologic map of the Colorado Plateau Area, Navajo Mountain-16 on the Navajo Indian Reservation in San Juan County, Utah, scale 1:24,000.

This is a scale 1:24,000 photogeologic map of the Verdure-3 Quadrangle in San Juan County, Utah.

This is a scale 1:24,000 photogeolgic map of Verdure-4 Quadrangle, San Juan County, Utah.

This is a scale 1:24,000 photogeologic map of Setsiltso Springs-5 Quadrangle on the Navajo Indian Reservation in Apache County, Arizona.

This is a scale 1:24,000 photogeologic map of Agathla Peak-8 Quadrangle on the Navajo Indian Reservation in Navajo County, Arizona.