NORTH COAST 24K HYDROGRAPHY ================================== COVERAGE NAME: NCHYDRO FEATURE TYPE: LINE SOURCE: 1:24,000 SCALE USGS DLG AND USFS CFF MINIMUM MAPPING UNIT: 1:24,000 AREAL EXTENT: CALIFORNIA NORTH COAST (APPROX RWQCB REGION 1) *Data available by River Basin for download follows the naming convention: hydro_w(shed number) ex: hydro_w1 See Basin List below: DATE OF LAST UPDATE: 4/13/01 COVERAGE DESCRIPTION: This dataset has been developed for the North Coast Watershed Assessment efforts by FRAP, in cooperation with the USDA Forest Service Remote Sensing Lab. The procedures used by FRAP and the USFS RSL are based on the Bureau of Land Management's Oregon/Washington Hydrography Handbook and are based on the LLID routing approach. (URL:http://www.or.blm.gov/gis/projects/hydro_protection) The base linework for this layer is based on the Forest Service's CFF (Cartographic Feature File) hydrography and USGS DLG hydrography linework derived from the DLG-3 digital series. DLG's and CFF's both originate from 1:24000 source maps. The library layer contains DLG linework as it came from USGS, plus edited and new linework. DLG coding is documented in "Digital Line Graphs From 1: 24,000-Scale Maps, Data Users Guide 2, 1985" available from the U.S. Department of the Interior, U.S. Geological Survey, Reston, Virginia. This dataset has been modified for hydrologic modeling in a stream network. Source files, based on 7.5' quadrangles, have been edge matched and edited for connectivity. In addition, the stream network has been centerlined through water bodies using artificial connectors. All arcs have been connected and oriented to flow downstream, and are routed. Lat/Long Identifiers (LLID) are used to uniquely identify the stream routes, and are available in the route attribute table. DATA DICTIONARY: DATAFILE NAME: NCHYDRO.AAT COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC --------------------------------------------------- 1 FNODE# 4 6 B - 5 TNODE# 4 6 B - 9 LPOLY# 4 5 B - 13 RPOLY# 4 5 B - 17 LENGTH 8 18 F 5 25 CDF_STRMS# 4 5 B - 29 CDF_STRMS-ID 4 5 B - 33 STREAMNAME 66 66 C - 99 STREAMLINK 15 15 C - 114 LPOLYLINK 15 15 C - 129 SPATIALSOURCE 3 3 C - 132 FVDATE 8 8 D - 140 EPAREACHNO 17 17 C - 157 STREAMORDER 2 2 I - 159 WTRBODYTYPE 2 2 C - 161 HYDFLOW 2 2 C - 163 PLANFLOW 1 1 C - 164 SPECIES_CODE 14 14 C - 178 FISHBEARING 3 3 C - 181 SPATIALEDIT 3 3 C - 184 LSTREAMNAME 30 30 C - 214 FPADIST 4 4 I - 218 FEDDIST 4 4 I - 222 ODFSTREAMCLASS 2 2 C - 224 FSSTREAMCLASS 1 1 I - 225 CONFINEMENT 2 2 C - 227 GRADIENT 3 3 I - 230 ROSGEN 3 3 C - 233 PFCCODE 4 4 C - 237 LABEL 50 50 C - FNODE# : The id number of the node feature that represents the beginning point (the From NODE) of the arc. TNODE# : The id number of the node feature that represents the ending point (To NODE) of the arc. LPOLY# : The # id of the polygon that lies to the left of this arc when facing in the direction of the TNODE. This is blank since there is no polygon topology. RPOLY# : The # id of the polygon that lies to the right of this arc when facing in the direction of the TNODE. This is blank since there is no polygon topology. LENGTH : The length of the arc in coverage units. CDF_STRMS# : The software-assigned unique integer identification number. CDF_STRMS-ID : A user-assigned identification number. STREAMNAME : The official name of the stream. STREAMLINK : Unique link item for each arc for relating to other databases. LPOLYLINK : Unique link item for relating an arc to a polygon in the Lakes layer. SPATIALSOURCE : Spatial Data Source: Original source from which the Spatial data was derived. FVDATE : Field Verification Date: used to track ground-truthing EPAREACHNO : EPA Reach Number: to link to other agency databases Description: Conflated from 1:100000 NHD data STREAMORDER : By Stahler method WTRBODYTYPE : Water Body Type Included Codes: ST RI DC PP SC ES LA WT IM IW UN: see BLM Hydrography Handbook HYDFLOW : Stream Flow Classification for SPACE and TIME Classification Method: Derived from DLG or CFF codes, or USGS scanned Quads Range of Values: SPACE - C, I, G. TIME - P, S, E, U. Also DL,DG,DI,PL,PG,PI. PLANFLOW : Plan Flow for habitat identification Derived From: DLG and CFF code, or USGS Quads Values: P,I,Z,X SPECIES_CODE : Individual Fish Species FISHBEARING : Fish Bearing SPATIALEDIT : Spatial Edit Technique Sources: See Washington/Oregon BLM Hydrography Included Codes: TBD,SCN,HUD,CRI LSTREAMNAME : Local Stream Name FPADIST : Forest Practices Act buffer distance on private lands FEDDIST : Federal Buffer Distance for actual Riparian Reserve. ODFSTREAMCLASS : For multi-ownership watershed models identified by the Forest Practices Act. FSSTREAMCLASS : USFS Stream Class for multi-ownership watersheds. CONFINEMENT : Ratio of channel valley width to actual channel width. GRADIENT : Change in elevation per unit of horizontal distance of channel. ROSGEN : Rosgen's stream classification information. PFCODE : BLM Functioning Condition Classification. LABEL : User Id DATAFILE NAME: NCHYDRO.RATSTREAMS COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC --------------------------------------------------- 1 STREAMS# 4 5 B - 5 STREAMS-ID 4 5 B - 9 KILO_LENGTH 10 10 N 3 19 NAME 60 60 C - 79 LLID 13 13 C - STREAMS# : The software-assigned unique integer identification number. STREAMS-ID : A user-assigned identification number. NAME : The official name of the stream. LLID : lat/long identifier (based on BLM Hydrography Handbook standard) Note : Refer to the source item to find the origin of the minor codes within the CFF or DLG User's Guide. ADDITIONAL PROCESSING NOTES: A companion waterbodies layer is available. DATA QUALITY ASSESSMENT: A quad by quad assesment of USGS topographic maps has been completed in order to verify that stream names match USGS stream names. We also checked to make sure we captured all the named streams off of the maps. All named routes with a frequency greater than 1 have been verified against the USGS topographic maps. CONTACT: Eric Spry, Eric_Spry@fire.ca.gov COORDINATE SYSTEM DESCRIPTION Projection UTM Zone 10 Units METERS Spheroid CLARKE1866 Parameters: Basin Basin Name -------------------------------- 1 'Albion River' 2 'Big River' 3 'Cape Mendocino' 4 'Eureka Plain' 5 'Garcia River' 6 'Gualala River' 7 'Lower Eel River' 8 'Lower Klamath River' 9 'Lower Trinity River' 10 'Mad River' 11 'Middle Fork Eel River' 12 'Middle Klamath River' 13 'Middle Main Eel River' 14 'Middle Trinity River' 15 'Navarro River' 16 'North Fork Eel River' 17 'Noyo River' 18 'Point Arena' 19 'Redwood Creek' 20 'Rockport' 21 'Russian River' 22 'Salmon River' 23 'Scott River' 24 'South Fork Eel River' 25 'Shasta Valley' 26 'Smith River' 27 'South Fork Trinity River' 28 'Trinidad' 29 'Upper Main Eel River' 30 'Upper Trinity River' 31 'Van Duzen River' DOCUMENTATION DATES: January, 2002: Reprojected to UTM NAD27 (no shift), and clipped to KRIS Project study area. Contact Name: P. J. Trichilo Institute for Fisheries Resources (IFR) 791 Eighth Street Arcata, CA 95521 Contact's Phone: (707) 822-9428