Water Resources Data, Montana, 2002

Water-Data Report MT-02-1

By W.R. Berkas, M.K. White, P.B. Ladd, F.A. Bailey, and K.A. Dodge

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Abstract

Water resources data for Montana for the 2002 water year consist of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; and water levels in wells. This report contains discharge records for 244 streamflow-gaging stations; stage or content records for 9 lakes and large reservoirs and content for 31 smaller reservoirs; water-quality records for 142 streamflow stations (42 ungaged), 9 ground-water wells, and 3 lakes; precipitation records for 2 atmospheric-deposition stations; and water-level records for 53 observation wells. Additional water year 2002 data collected at crest-stage gage and miscellaneous-measurement sites were collected but are not published in this report. These data are stored within the District office files in Helena and available on request. These data represent part of the National Water Data System operated by the U.S. Geological Survey and cooperating State and Federal agencies in Montana.

TABLE OF CONTENTS

Preface
Surface-water stations, in downstream order, for which records are published in this volume
Introduction
Cooperation
General hydrologic setting
Hydrologic-monitoring activity, water year 2002
Summary of hydrologic conditions, water year 2002
    Temperature and Precipitation
    Streamflow
    Water quality
    Ground-water levels
Special networks and programs
    Hydrologic Benchmark Network
    National Stream-Quality Accounting Network (NASQAN)
    National Atmospheric Deposition Program/National Trends Network (NADP/NTN)
    National Water-Quality Assessment (NAWQA) Program
Explanation of the records
    Station identification numbers
        Downstream-order system
        Latitude-longitude system
        Rectangular-grid system
    Records of stage and water discharge
        Data collection and computation
        Data presentation
            Station manuscript
            Data table of daily mean values
            Statistics of monthly mean data
            Summary statistics
        Identifying estimated daily discharge
            Accuracy of the records
            Other records available
            Publications
        Records of surface-water quality
            Classification of records
            Onsite measurements and sample collection
            Water temperature
            Sediment
            Laboratory analyses
            Explanation of the reporting convention for long-term method detection levels
            Presentation of water-quality records
            Remark codes
            Quality-control data
                Blank samples
                Reference samples
                Replicate samples
                Spike samples
            Publications
        Records of ground-water levels
            Data collection and computation
            Publication
Access to USGS water data
Definition of terms
Techniques of Water-Resources Investigations of the U.S. Geological Survey
Montana active and discontinued streamflow-gaging, water-quality, and crest-stage gage stations
Station records, surface water and water quality
        Smaller reservoirs in Missouri River Basin in Montana
        Smaller reservoirs in Pend Oreille River Basin in Montana
Quantity of precipitation (NADP/NTN)
Index

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