Washington State River Miles (USGS-WDFW) (2014)

Ecology created the GIS statewide river mile point layer in March 2007 by digitizing the river mile points depicted on the USGS 7½ minute (24k) topographic quadrangle maps. Some of the rivers have gaps in the river mile progression because several of the quadrangle maps do not have any river mile points, while a few were missing a point or two.

In November 2014 Ecology added river mile points for the missing areas using Washington Department of Fish and Wildlife's (WDFW) 1975 Stream Catalog, which only covers WRIA's 1 through 24. The Stream Catalog shows river miles for nearly every stream; however, only those water courses that have river miles from the USGS quadrangle maps were added.

The field SOURCE denotes the source of the data point, USGS or WDFW.

Discrepancies between the USGS and WDFW are documented in the Supplemental Information section.

Supplemental Information:

USGS 7½ quadrangle maps with no river mile points: Aberdeen SE, Astoria, Auburn, Bacon Peak, Big Devil Creek, Black Diamond, Burnt Peak, Carlisle, Cathlamet Bay, Chinook, Clark Mtn, Colfax North, Copalis Crossing, Des Moines, Diamond, Elberton, Everett, Fort Simcoe, Glacier, Gold Bar, Grant Orchards, Greenwater, Groat Mountain, Index, Lake Lawrence, Mabton East, McKays Butte, Maltby, Maple Valley, Moses Lake NW, Mount Vernon, Mt Blum, Mt Juniper, Mt Larabee, Mt Lyall, Mt Sefrit, Naches, Newaukum Lake, Onalaska, Onalaska NW, Poverty Bay, Prosser, Puyallup, Renton, Rosburg, Seattle South, Smith Creek Butte, Snohomish, Snoqualmie Lake, South Bend, Stanwood, Tacoma North, Tacoma South, Thorp, Toppenish Mtn, Trinity, Vail, Warrenton, Western, White Swan, Whitstram.

On the Columiba River, river mile 681 is missing since it's missing on the USGS 7½ quadrangle, Rice. There are two versions of the Rice quandrangle map. One is missing mile marker 681 and the other, mile marker 691. This layer is missing the 681 mile marker.

Additional points for WRIAs 1-24 added using river mile points based on Washington Department of Fish & Wildlifes, 1975 Stream Catalog. 
Stream Catalog points were added where they would match the USGS sequence. At "match points" where USGS and WDFW river miles meet, a point was added even though points were close in distance or out of numerical sequence. Priority was given to the USGS points where they were close together or both points are presented even if they have the same number. Discrepancies between the two sources occur mostly in the coastal (western) rivers.

Discrepancies: 
WRIA 4: 
Big Beaver Creek - River mile 10 repeated. 
WRIA 9: 
Green River - River mile 69 repeated. 
WRIA 11: 
Nisqually River has no USGS river mile points. 
WRIA 20: 
Bogachiel River - USGS river mile 33.8 is upstream of WDFW river mile 34. 
WRIA 21: 
Clearwater River - WDFW miles off by one mile, river mile 29 repeated. Queets River - WDFW miles off by one mile, river mile 48 repeated. Quinault River - WDFW miles off by one mile , river mile 67 repeated. Quinault River, North Fork - WDFW river mile 15 downstream of USGS river mile 14.8. 
WRIA 22: 
Canyon River - WDFW river mile10 and USGS river mile 9.2 are very close. Humptulips River - WDFW river mile 18 downstream of USGS river mile 17.2. Humptulips River, West Fork - WDFW river mile sequence off by one mile. No river mile 57. Naselle River - WDFW mile off by one mile, river mile 17 repeated. Satsop River, Middle Fork - WDFW miles off by one mile, river mile 28 repeated. Wynoochee River - WDFW’s miles are off and WDFW river mile 63 is upstream of USGS river mile 64.5. 
WRIA 24: 
North River - River miles 21 & 22 close together, no river mile 58. Willapa River - WDFW river mile 7 upstream of USGS river mile 8.