WSPC02427 - Laserfiche WebLink

Home Browse Search

001771 2513.1 TITLE 2500 - WATERSHED MANAGEMENT e 2513.1 - Watershed Data Reference File. The Washington Office Watershed and Air Staff maintains the watershed reference file or user's guide that describes analytical techniques supported and approved for national application. The file is on the Ft. Collins computer. 2513.2 - Watershed Coding. Use the standardized numbering system code developed and coordinated with other Federal Agencies to facilitate data reporting and management. The watershed coding system consists of 6 fields containing 11 characters, for example: 17 01 02 05 03 A. The first 8 characters comprising the first 4 fields are the Hydrologic Unit Code found on hydrologic unit maps prepared by the U.S. Geological Survey in cooperation with the Water Resources Council (WRC). They are respectively: Water Resources Council Region, Water Resources Council Subregion, Water Resources Council Accounting Unit, and Water Resources Coun- cil Cataloging Unit, expressed numerically. The last 3 char- acters (fifth and sixth fields) are the specific National Forest System Watershed identification. The fifth field is composed of two numbers; the sixth field is a single charac- ter which can be either a number or a letter which repre- sents a sub-watershed. It is shown graphically as follows: .' , I .. e e Hydrologic Unit Code WRC Region--I J Unit + 02 03 A WRC Accounting Specific NFS Watershed l 05 I 17 01 T WRC Cataloging Unit IWRC I e Subregion Code all specific NFS watersheds using this 3 character system. More than 3 characters are not allowed. Coordinate numbers with other Regions and Forests if watershed boundaries cross administrative boundaries. *-FSM 12/85 AMEND 46-* e Jlo u.s. Governlllent Printing Office: 1985 -490-921120247