Dam Facilities Abstract: This coverage is a spatial representation of most of the Pacific Northwest dam facilities in the StreamNet database. Information about the location of each dam facility was collected from StreamNet personnel at WDFW (Washington Dept of Fish & Wildlife), ODFW (Oregon Dept of Fish & Wildlife), IDFG (Idaho Dept of Fish & Game), and MFWP (Montana Fish, Wildlife & Parks) and the tabular information about each hatchery in the StreamNet database was then added to each dam facility point in the GIS coverage. Original information for most facilities was derived from the National Inventory of Dams and then revised and amended when better information could be found by the StreamNet data compilers. For more information about this coverage, please contact: Regional StreamNet GIS Specialist (StreamNetGIS@psmfc.org) Purpose: Data is intended for use in a variety of applications where location of and information about dams is important. Limitations_of_Data: Dam facility locations were determined from longitude/latitude coordinate or 1:100,000 scale stream based information submitted by StreamNet personnel at the state agencies. Longitude and latitude coordinates were generally determined to 4 decimal places (ie. long 123.5763, lat 44.2345) but may be less precise for some hatcheries. Wherever possible, dams were linked to 1:100,000 scale streams via the LLID routing system, so that they would plot out directly on the stream. The event table data format only includes the data records that are linked to this stream routing system. Information on more dam facilites were provided by some state data compilers than others, so this coverage should not be used for cross-state comparisons of the number of dam facilities. Entity_and_Attribute_Overview: Attribute Type Definition AREA Binary Fl.Point Internal field- Not applicable to this data set PERIMETER Binary Fl.Point Internal field- Not applicable to this data set DAMS# Integer Internal feature number for each point DAMS-ID Integer User-assigned feature number for each point DAMNAME Character The name of the dam facility STATE Character The state where the dam facility is located FISHWAY Character Description of fish passage facilities FISHWAYTYP Character Description of type of fishway OWNER Character The owner of the dam OWNERTYPE Character The institutional status of the dam owner YEARINIT Binary The year that construction of the dam began YEARCOMPL Binary The year that the dam was completed YEARREMOVE Binary The year that the dam was removed (if applicable) DAMLENGTH Binary Fl.Point Dam crest length, in feet NIDHEIGHT Binary Fl.Point The maximum of dam, structure, or hydraulic height, in feet, according to the National Inventory of Dams SNETHEIGHT Binary Fl.Point The height of the dam, in feet, from a source other than the National Inventory of Dams NORMSTORAGE Binary Fl.Point The normal storage capacity of the reservoir in acre feet MAXSTORAGE Binary Fl.Point The maximum storage capacity of the reservoir in acre feet REFID Binary Fl.Point The primary reference number describing the source of the dam information. For a corresponding table of references, see ftp://ftp.streamnet.org/pub/streamnet/ASCII_Data/Reference.txt NID# Character The National Inventory of Dams ID number FERCSITEID Character The Federal Energy Regulatory Commission Site Locatin Code LLID Character The unique stream identifier for the 1:100,000 scale stream that the dam is located on. STRMNAME Character The name of the stream that the dam is on. BEGFT Integer The coordinate on the LLID routing system that the dam is at (event table only) DAMID Binary Fl.Point Unique StreamNet identifier for the dam MAJOR Character Is this a major dam? (Y=yes, N=no). This attribute was determined by examining the height, width, storage capacity, and FERC information on energy production for the facility, and is subjective. Procedures_Used: Generated a geographic coverage with the longitude/latitude coordinates for each facility based on location information from the StreamNet hatchery facility database. Dam facilities that did not have longitude/latitude or stream-based locations were not included. Projected the coverage to the StreamNet lambert projection and added additional data fields to the point attribute table. Imported the StreamNet dams information table, related it to the point attribute table by StreamNet Dam ID, and populated the additional information to the point attribute table. Revisions: This is the first version of this data file (created June 2002). Further updates will be made if/when new facility information is submitted by the state data compilers. Reviews_Applied_to_Data: Visual Q/A. Related_Spatial_and_Tabular_Data_Sets: The StreamNet Dam Table - Available for download at http://www.streamnet.org/online-data/asciitables.html Currentness_Reference: Data is current as of year 2002. Access_Constraints: None Data_Set_Credit: Data was compiled by the StreamNet project (http://www.streamnet.org). Data was provided by Washington Dept. of Fish & Wildlife, Oregon Dept. of Fish & Wildlife, Idaho Dept. of Fish & Game, and Montana Dept. of Fish, Wildlife & Parks, Much of the original data was collected from the National Inventory of Dams. Completeness_Report: Complete data set. See "Limitations of Data" for limitations. GIS Data Projection Info: PROJECTION LAMBERT UNITS FEET DATUM NAD27 SPHEROID CLARKE1866 1st Standard Parallel 42 20 0.000 2nd Standard Parallel 48 40 00 central meridian -117 00 0.00 lat org 41 00 0.00 easting 914401.82880 (in meters) northing 0.0