INSTITUTE FOR FISHERIES RESOURCES GIS TECHNICAL WORK GROUP -- GIS METADATA LIBRARY: Garcia/Navarro COVERAGE NAME: amengis.shp METADATA FILE: amengis.shp.txt METADATA FILE DATE: May 9, 2003 METADATA PREPARER: Eli Asarian Institute for Fisheries Resources (IFR) 791 Eighth Street Ste. N Arcata, CA 95521 (707) 822-9428 DATA ORIGINATOR: Sandra Pérez [(530) 623-1351 ext.8, sperez@trinitycounty.org] Mark Lancaster [(530) 623-1351 ext.5, mlancaster@trinitycounty.org] PO Box 2819 190 Glen Rd. Weaverville, CA 96093 http://www.trinitycounty.org/Departments/Planning/planning.htm COVERAGE DESCRIPTION: This shapefile contains locations for potential road-related erosion sources for county roads in Mendocino County. The data was collected as part of the Five Counties Salmonid Conservation Program (FCSCP) Direct Inventory of Roads and their Treatments (DIRT) program. Surveys were conducted by the Mendocino Department of Transportation. The five counties are Mendocino, Humboldt, Del Norte, Trinity, and Siskiyou. Surveys were conducted in The following four paragraphs were excepted from a Trinity County Planning Department cover letter that came with DIRT data CD (dated April 2003): The goals of the FCSCP's road erosion inventories are to: identify specific sites along county roads and facilities that are contributing sediment to waterways; prioritize implementation treatments to assure economic, biological, management and physical effectiveness; and identify sites where excess material (spoils) generated from construction and maintenance projects can be stored with minimal potential for sediment delivery into watercourses. Methodology The Pacific Watershed Associates (PWA) protocols for forest and ranch road inventories were used to develop DIRT. The PWA model was modified to reflect the differences between private forest and ranch roads and public roads. There are currently two versions of the Access database, v1.4 and v1.5. We are working on v2.0. PWA completed an intensive field-training program for all crew members and was responsible for quality assurance and control (QA/QC) of inventory crews, assessments, and data collection. Field inventory techniques and more detailed information on the DIRT databases are found in the "Final SB 271 Report - Coastal Data" on this CD. Final prioritization will be based on various factors obtained directly from DIRT -- treatment immediacy, potential sediment delivery volumes, and likelihood of delivery to a stream - and factors not entered into the DIRT database: biological considerations of anadromous salmonids (habitat quality and quantity), current water quality violations, TMDL criteria, cost effectiveness, subsequent scheduling of county capitol improvement and maintenance projects, management, public input, complexity and design, and other professional considerations. To date, most of Del Norte, Humboldt, Mendocino, and Trinity Counties within the Five Counties area have been inventoried. Grants to complete most of the remaining areas of these counties have been approved under the CDFG Fisheries Restoration Grant Program. Mendocino County is currently inventorying the Russian River watershed. VITAL STATISTICS: Datum: = NAD 27??? Projection = Albers Equal-Area Conic Spheroid = Clarke 1866 Central Meridian = -120 Reference Latitude = 0 Standard parallel 1 = 34 Standard parallel 2 = 40.5 False Easting = 0 False Northing = -4000000 Source: = see notes above Data Structure: = Vector (line) DATA DICTIONARY: NOTE: Items common to all ARC/INFO coverages: LENGTH, AREA, PERIMETER COVER_ (#), and COVER _ID (-ID) are not described here. Structure for attribute table Column Column Name 8 SITENO 9 COUNTY 10 ROADNAME 11 WATERSHED 12 PROBLEM 13 GPSXCOORD 14 GPSYCOORD 14 MAPXCOORD 15 MAPYCOORD 16 EROSIONPOT 17 IMMEDICACY Column Name Description ----------- --------------------------------------------------------- FIELD DESCRIPTION SITENO Site Number (unique ID within each county) COUNTY County where site is located ROADNAME Name of road where site is located WATERSHED Name of watershed where site is located PROBLEM The type of problem at the sites GPSXCOORD X coordinate in UTM, unknown how this differs from MAPXCOORD GPSYCOORD Y coordinate in UTM, unknown how this differs from MAPYCOORD MAPXCOORD X coordinate in UTM, unknown how this differs from GPSXCOORD MAPYCOORD Y coordinate in UTM, unknown how this differs from GPSYCOORD EROSIONPOT What is the potential for the site to fail in the future? This prioritizes sites according to erosion potential. H,HM,M,ML,L. IMMEDICACY If the site is to be treated, what is the treatment immediacy at the site? This prioritizes sites for treatment. H,HM,M,ML,L. Leave blank if site is not treated. DATA QUALITY ASSESSMENT: Geographic accuracy of these points should be good, as all points were generated using a GPS (see methods above). The GPS unit was of unkown quality, so the accuracy is probably between 1 to 30 meters. DOCUMENTATION DATES: 5/9/2003: Original shapefile amengis1.shp and amengis2.shp were combined using the Merge Themes function in the ArcView Geoprocessing Wizard. The resulting shapefile was then reprojected into UTM Zone 10, NAD 27 using the ArcView Projector! Extension. Contact Name: Eli Asarian Institute for Fisheries Resources 791 Eighth Street Ste. N Arcata, CA 95521 (707) 822-9428