KRIS Navarro : Meta Information Page

Meta Identifier	FCREI_roads
Type of Data	Road-related potential erosion survey
Originator	Trinity County Planning Department
Description	Potential and existing sediment source sites related to county roads were inventoried in the five counties area (Mendocino, Humboldt, Del Norte, Trinity, and Siskiyou). These included stream crossings, gullies below ditch relief culverts and long sections of uncontrolled road and ditch surface runoff. The volume of potential sediment erosion and percentage delivered to the stream system was estimated for each site and entered into an Access database. A GIS map of the sediment source sites was also created. Surveys were conducted by various agencies (in Mendocino County by the Mendocino County Department of Transportation), with training and protocol design by Pacific Watershed Associates. Chart tables in KRIS are only for the Navarro Project Area, but the GIS layer (in the KRIS Map Viewer) contains data for all of county roads in Mendocino County (except the Russian River), and the Five Counties Road Erosion Inventory Report is in the KRIS bibliography.
Area	Northwest California (Mendocino, Humboldt, Del Norte, Trinity, and Siskiyou counties)
Metadata Date	5/15/03
Metadata Contact	Eli Asarian
Contact Person Primary	Sandra Pérez
Status	complete
Request Log	Talked to Sandra in mid-april on the telephone, she said she would send the data soon: ArcView, Access and electronic report
Receipt Log	4/24/03. CD received with data in ArcView, MS Access and MS Word/Excel formats
Lead Person	Eli Asarian
Lead Organization	IFR-KRIS
Data Set Name	sediment_road_nav_fcrei_00_01.dbf
Date of Content Start	7/5/00
Date of Content End	7/3/02
Purpose	To document assess road-related erosion in the five counties area. The sites inventoried were those with the potential to deliver sediment to streams, resulting in damage to fisheries resources and/or water quality. The inventory is one part of a comprehensive effort towards the restoration of anadromous fisheries and water quality through the Five Counties Salmonid Conservation Program.
Keywords	roads, sediment delivery
On Line Linkage (URL)	http://www.trinitycounty.org/Departments/Planning/planning.htm
Publisher	Trinity County Planning Department- NR Division
Publication Place	Weaverville, CA
Publication Date	February, 2003
Title	Five Counties Road Erosion Inventory, Final Report For CA Department of Fish and Game SB271 Program
Abstract	In 1999, the California Department of Fish and Game awarded Trinity County two S.B. 271 contracts to conduct a County Roads Erosion Inventory in the counties of Del Norte, Humboldt, Mendocino, Siskiyou and Trinity. The sites inventoried were those with the potential to deliver sediment to streams, resulting in damage to fisheries resources and/or water quality. The inventory is one part of a comprehensive effort towards the restoration of anadromous fisheries and water quality through the Five Counties Salmonid Conservation Program. Initially, the Counties considered the protocols for forest and ranch road inventories set forth by Pacific Watershed Associates and then modified them to reflect the differences between private and public roads. The final inventory protocol, known as the Direct Inventory of Roads and Treatments (DIRT), was then converted to a Microsoft Access database that was used in the field to directly input site data. During the early stages of development of DIRT, three "beta" versions were tested and the results included in a file set referred to as Version 1.3. The sites in this version do not contain all of the chronic erosion sources of the later data sets. For this reason, the results for this data set are shown as a separate summary report. All inventory sites were also located using map coordinates and GPS points to allow them to be loaded into an ArcView GIS platform. For this project, the collection of data at an ecosystem (or Evolutionarily Significant Unit - ESU) level provides responsible agencies, the public, and funding managers with a valuable mechanism with which to quantify and reconcile multiple physical-factors. The SB 271 grants were proposed to inventory 1,491 miles within the Five Counties, however, time and other constraints prevented completion of all work. The portions of the contract inventory areas in Trinity and Siskiyou Counties were not started. However, under these grants, 6,086 sites were inventoried on over 1,207 miles of county roads in Del Norte, Humboldt and Mendocino Counties for potential sediment delivery to streams, spoil disposal areas, and possible salmonid migration barriers. 5,205 of these sites were identified as potential erosion sites, and 274 spoils disposal sites were located. The remaining sites were classified as non-treatment sites or as delivering less than 20 yd3 of sediment to a stream. The sites inventoried in DIRT could theoretically yield over 1.52 million cubic yards of sediment to streams over the next ten years and/or in a large storm event (greater than a 10 year storm). Potential sediment yield estimates do not take into account the effects of individual county road maintenance practices. County road maintenance programs help to prevent and treat those conditions that would contribute to sediment delivery to a stream. For example, routine maintenance activities, including the cleaning of culverts and ditches, can help prevent many potential problems documented in this report from occurring. The treatment cost of all sites is estimated at approximately $24.6 million with an average cost of $16.88* /yd3. It is not economically feasible to treat all sites, and therefore, the cost-benefit ratio for all sites must be considered in implementing this program. A ranking model was developed to prioritize the data generated from these inventories, so that the most urgent sites with the best overall cost/benefit ratio are targeted for treatment. Based on the inventory and cost analysis presented in this report, it is reasonable to predict that all County roads in the five northwestern California counties could have more than $100 million of restoration funding needs for water quality and associated salmonid habitat concerns. Although the total costs and value of restoration treatments may not be realized for a decade or more, declining salmonid populations in some of the river systems create an immediate need to improve habitat and water quality at critical problem sites. Inventories on both a large and a small scale improve the public's confidence that proposed projects are resulting in the greatest cost-benefit ratio for the resources at risk. Preface: All work completed under the SB 271 program was done as part of a larger conservation strategy developed in response to the 1997 listing of the coho salmon as a federal Threatened species by the Boards of Supervisors of Del Norte, Humboldt, Mendocino, Siskiyou and Trinity Counties. These Counties formed a salmonid conservation program based on the boundaries of the coho evolutionarily significant units (ESU) that encompass them. This effort, known as the Five Counties Salmonid Conservation Program, includes multiple program elements for the restoration of salmonid habitat (refer to Appendix A of this report). This effort represents the first time that multiple County governments have formed a watershed-based conservation strategy to address the biological, watershed, political, social and economic effects of declining salmonid populations. 26% of all county roads were inventoried under the SB 271 contracts. An additional 12% of county roads were inventoried under a simultaneous Proposition 204 grant. The same survey designs, quality control, data management, and prioritization standards were utilized for the work done under both contracts. The products of work completed under grants 9958013 and 9958149 are combined in this report to assist in data integration and consistency with all other work done as part of the overall Five Counties Conservation strategy. Acknowledgements: The field work for this grant was accomplished by dedicated field staff including Dennis Slota, Polly Chapman, Carolyn Rourke, Ole Wik, Earl Brown, Dawn Petersen, Gary Friedrickson, Tom Leroy, Danny Hagans and others. The inventory work summary and data analysis presented in this report was made possible by the dedicated efforts of the following people: Dennis Slota, Mendocino Water Agency; Carolyn Rourke, Sandra Pérez and Janet Clements, Trinity County Planning Department-Natural Resources Division; Sef Murguia, Humboldt County Public Works; and Eileen Weppner, Tom Leroy and others at Pacific Watershed Associates. In all cases, this group of people worked above and beyond the call of duty, and their dedication to finding workable solutions for restoring salmonid populations is to be commended.
Other Citation Details	Five Counties Road Erosion Inventory report is in KRIS bibliography
Storage Location	Weaverville, CA
Contact Organization	Trinity County Planning Department- NR Division
Contact Address	190 Glen Rd.
Contact City	Weaverville
Contact State	CA
Contact Zip Code	96093
Contact Voice Telephone	(530) 623-1351 ext.8
Contact Email	sperez@trinitycounty.org

 
 
 

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