Introduction: This report was started as part of a study of the North Cascade Primitive Area, an area of about 830,000 acres, which adjoined the Canadian border on the north and which extended from Mount Shuksan on the west to Rock Mountain on the east. In the fall of 1968, Public Law 90-544, 90th Cong., reclassified the North Cascade Primitive Area and certain other national forest lands and created the North Cascades National Park, the Ross Lake National Recreation Area, and the Pasayten Wilderness. Ross Lake National Recreational Area, a corridor 21/2-4 miles wide along the Skagit River and its dammed portions, Ross, Diablo, and Gorge Lakes, separates the park into two parts and separates the northern part of the park from the Pasayten Wilderness. The present study concerns those parts of North Cascades National Park and the Ross Lake National Recreation Area that are north of Skagit River and west of Ross Lake (fig. 1), as well as part of the Mount Baker National Forest west of the park (pl. 2).

Introduction: This report summarizes the results of the study and presents technical information on the water resources of the basin for hydrologists, engineers, planners, and water managers who need this knowledge to guide their endeavors. A brief lay-reader report describing this study is also in preparation for those who may be interested in the general findings and highlights of the investigation without the detail and data compilations contained in this report.

This report provides an evaluation of sediment transport by the White River into Mud Mountain Reservoir during the two-year period of June 1974 and June 1976. It includes graphs and tables.

This report presents flood profiles for the Cedar River in Washington State and discusses the probability of there being a hundred-year flood. It includes maps and graphs.

Abstract: Eruptions and other geologic events at Mount Baker during the last 10,000 years have repeatedly affected adjacent areas, especially the valleys that head on the south and east sides of the volcano. Small volumes of tephra were erupted at least four times during the past 10,000 years. Future eruptions like these could cause as much as 35 centimeters of tephra to be deposited at sites 17 kilometers from the volcano, 15 centimeters of tephra to be deposited 29 kilometers from the volcano, and 5 centimeters, 44 kilometers from the volcano. Lava flows were erupted at least twice during the last 10,000 years and moved down two valleys. Future lava flows will not directly endanger people because lava typically moves so slowly that escape is possible. Hot pyroclastic flows evidently occurred during only one period and were confined to the Boulder Creek valley. Such flows can move at speeds of as much as 150 kilometers per hour and can bury valley floors under tens of meters of hot rock debris for at least 15 kilometers from the volcano. Large mudflows, most of which contain hydrothermally altered rock debris, originated at Mount Baker at least eight times during the last 10,000 …

From introduction: The purpose of this report is to evaluate and describe relationships between the volcanic activity on Mount Baker and the possible impacts on Baker Lake water.

From abstract: The objective of the work was to define areas showing surface indications of a generally higher uranium content where detailed exploration for uranium would most likely be successful.

From introduction: This report, one of a series of three reports (Marjaniemi and Robins, 1975a and 1975b) on a study of Tertiary sedimentary rocks in northeastern Washington, presents the results of an investigation of Tertiary sediments of the western Okanogan highlands and upper Columbia River valley. The project was conducted on behalf of the Energy Research and Development Administration (ERDA), formerly the U. S. Atomic Energy Commission.

Appendix containing single-record and averaged-record data listings to accompany a report on aerial radiometric and magnetic reconnaissance of the Ritzville Quadrangle.

From summary: The purpose of this study was to delineate favorable areas for uranium resources in northeastern Washington and northern Idaho by identifying granitic rocks with relatively large amounts of uranium and (or) thorium. Results are based on analyses of 344 rock samples; 230 were collected during this study, and data for the rest were taken from previous publications.

Report describing the results of geochemical and stream sediment reconnaissance sampling in the Sandpoint Quadrangle, to look for uranium and trace elements, and to take other measurements.

Appendices containing analyses of water, stream, and sediment samples to accompany a report on hydrogeochemical and stream sediment reconnaissance in Washington, Idaho, and Montana.

Supplementary data containing elemental concentration data in rock samples in addition to sample location maps to accompany a report on U.S. uranium resources in Northeastern Washington and Northern Idaho.

From abstract: "This report presents a detailed discussion of he results obtained in a study conducted to evaluate the release of polychlorinated biphenyls (PCB's) during open-water disposal of contaminated dredged material in Elliot Bay, Puget Sound, Washington."

From preface: "This report summarizes the results of a comprehensive investigation of the impact of open-water dredged material disposal by barges in Elliot Bay, a portion of Puget Sound Estuary, Washington."

The following report describes work done by the Marine and Freshwater Ecology Branch, Corvallis Environmental Research Laboratory (CERL), Environmental Protection Agency (EPA), Corvallis, Oregon. The study was conducted on the chemical and physical effects of open-water disposal of dredged material from the Duwamish River into Elliot Bay, Washington.

This report studies the several aspects of the basalts in the Columbia River Basalt Group in the Spokane quadrangle, Washington, Idaho, and Montana.

Final report documenting a high-sensitivity airborne radiometric and magnetic survey of the Okanogan and Sandpoint quadrangles including the survey description, specifications, data processing methods, interpretation methods, and regional geologic review.

Second volume of a report documenting a high-sensitivity airborne radiometric and magnetic survey of the Okanogan quadrangle including maps documenting geophysical and geochemical data, as well as magnetic, ancillary and radiometric data.

Second volume of a report documenting a high-sensitivity airborne radiometric and magnetic survey of the Sandpoint quadrangle including maps documenting geophysical and geochemical data, as well as magnetic, ancillary and radiometric data.

Appendix containing river sediment data graphs in addition to chemical and physical analysis data to accompany a report on aquatic disposal field investigations of the Duwamish Waterway disposal site in Washington.

Appendix containing data on the recolonization of benthic macrofauna over a deep-water disposal site in the Duwamish River influenced portion of Elliott Bay. It accompanies a report on the chemical and physical effects of open-water disposal of dredged material from the Duwamish River into Elliot Bay as part of a study to determine the effects of disposal sites on organisms and the quality of surrounding water.

This appendix includes data documentation from the analysis of water, sediment, SPM, elutriates, and interstitial waters for chlorinated biphenyls, and the results from this analysis of sediment for TOC, oil-grease, and percent-solids.

Appendix presenting data listings and depth profiles of hydrography reports recorded as part of a study evaluating the release of polychlorinated biphenyls during open-water disposal of contaminated dredged material in Elliot Bay, Puget Sound, Washington.