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King County, through its public works agencies, has been historically responsible for the siting, construction, inspection, maintenance, repair and replacement of highway bridges, overcrossings, and undercrossings within its jurisdiction. The county maintains a record of these activities for each bridge. Part of this record is maps and drawings. This series is composed of oversized site and vicinity maps; structural plans; standard detail drawings; and field and survey sketches separated from Series 36, Road Engineer Bridge Files 1901-1994. In general, graphic materials measuring 8.5 by 14 inches or less have been retained in Series 36. The oversized graphic materials in this series are present in various physical formats, primarily reproductions using various processes (blueprint, blueline, brownline, xerographic). Field sketches may be original pencil or ink drawings on paper. A preliminary division of the oversized maps and drawing has been made, according to their storage status (folded in document boxes, or unfolded in map drawers) has been made. Within each group, maps have been given a temporary ascending numerical arrangement corresponding to the box and folder in Series 36 from which they were separated. Related records: Accessions from the Roads Map Vault of the King County Department of Transportation may contain original versions of reproduced drawings found in this series


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