This volume of the annual hydro!ogic data report of Colorado is one of a series of annual reports that document hydro!ogic data gathered from the U.S. Geological Survey's surface-and groundwater data-collection networks in each State, Puerto Rico, and the Trust Territories. These records of streamflow, ground-water levels, and quality of water provide the hydro!ogic information needed by State, local, and Federal agencies, and the private sector for developing and managing our Nation's land and water resources. Hydro!ogic data for Colorado are contained in three volumes:

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Voluriie 2. Colorado River Basin Volume 1. Missouri River Basin, Arkansas River Basin, and Rio Grand'e Basin U,S. GEOLOGICAL SURVEY WATER-DATA REPORT CO-86-2 Prepared in cooperation with the State of Colorado and with other agenciesVII (Letter after station name designates type and frequency of published data. Daily tables: (D) discharge, (C) specific conductance, (S) sediment, (T) temperature, (e) elevation or contents, (0) dissolved oxygen, (P) pH. Partial tables: (c) chemical, (b) biological, (m) microbiological, (s) sediment, (t) temperature)

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