Grant County, WashingtonRoad centerlines digitized and maintained by Grant County GIS office. ROADNAME The name of the road, without road type or road direction. In capital letters. ROADTYPE The type of road. Drive, Street, Avenue, Court, Ramp, Road, Driveway, etc. ROADPOSTDIR The direction of the road. NW, NE, SW, SE. See Grant County Code Title 10 - ROADS, HIGHWAYS AND BRIDGES >> Chapter 10.16 - DESIGNATION AND CLASSIFICATION OF COUNTY ROADS >>10.16.010, which in part states: Roads running easterly and westerly, located northerly or southerly of base line, which is the township line between Townships 18 and 19 North, to be numbered beginning with road number one being the road on Section line one mile northerly of, or southerly of, base line, as the case may be; thence one number per section line road numbered consecutively. Roads running northerly or southerly, located easterly of or westerly of meridian line, which is the range line between Ranges 26 and 27 E.W.M., to be designated by letter, the road located on section line one mile easterly of or westerly of said meridian line, as the case may be, being designated by the letter "A"; thence one letter per each section line road lettered consecutively. Intermediate roads running in a cardinal direction within sections shall be designated by the next lower number or letter, followed by the distance in tenths of a mile; for example, a road five and one-half miles north of base line in northwest quadrant would be Road 5.5 N.W. The above described plan divides the county into four quadrants; southwest, northwest, southeast, and northeast. Roads will, in addition to the above described number or letter, carry the appropriate suffix, SW, NW, SE or NE. Diagonal roads or winding roads shall be designated by name, as authorized by the board of county commissioners. ALTROADNAME A local name or alternative name for the road. FEDROUTE The Interstate or US Route number STROUTE The State Route number CTYROUTE A Yes entry indicates it is a County-maintained road. County maintenance responsibility changes often. The data is only as good as the last update from the Public Works Department. FULLNAME The full name of the road, including the Road Name, Road Type, and Post Direction. In title case capitalization. ROUTETYPE The type of transportation route. Interstate, US, State, County, City, Rural, Access, Driveway CityName The Grant County city the road is associated with.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/5393e616dc5a451ca984976142dfc4ff_1engGrant County Open Data PortalPublicRoad Centerlines [Washington (State)--Grant County]Web servicesWashington (State)--Grant CountyWashington (State)Last Modified: 2025-12-18