Oregon Historical County Records Guide

Clackamas County Records Inventory

Maps, Plans, and Drawings

1838-[ongoing]

Series provides a visual representation of the county and of physical structures constructed on county lands. Series includes maps, plans, and drawings that vary in size, scale, and date. Included are maps, plans, and drawings of counties and cities, election precincts, courthouses and other county buildings, cemeteries, rivers, Indian reservations, school districts, construction projects, and soil classifications. General road maps may be found in the series titled Road and Bridge Records. Technical road survey maps may be found in the series titled Road Maps and Survey Notes.

Records at the Oregon State Archives:
Plat Book [1940 Maps-Assessor], 1940 (1 volume);
Power and Irrigation System Map, 1919 (.10 cu.ft.).

Records at the Clackamas County Assessment and Taxation Office, Public Service Area:
[Assessor's Plats], n.d.-present (42 volumes).

Records at the Clackamas County Assessment and Taxation Office, Map/Duplication Room:
[Miscellaneous Rolled Maps-includes railroad, code, city limits, etc.], 1917-present (ca.50 maps);
Old Sec. Maps [Section-Assessor's Maps]. ca.1959-ca.1970 (ca.500 maps).

Records at the Clackamas County Assessment and Taxation Office, Cartography Area:
P.G.E. Company [Portland General Electric Acreage Plats], ca.1892-ca.1941 (1 volume);
P.G.E. Map Book [Portland General Electric Acreage Plats], ca.1892-ca.1941 (1 volume).

Records at the Clackamas County Sunnybrook Service Center, Surveyor's Office Public Research Room:
[Assessor's Plats], 1931-1965 (1 volume); 1932-1959 (1 volume); 1958-1964 (1 volume); 1995 (8 volumes);
Index to Locations of All Files in Clackamas County Surveyor's Office [indexes Donation Land Claims, surveys, corner restorations, roads, subdivisions, partitions, and miscellaneous maps], ca.1851-ca.1993 (1 binder);
[Miscellaneous Maps and Plats-A to Z Letter Series-includes road, bridge, subdivision, corner restoration, survey, and miscellaneous maps and plats], 1853-ca.1990 (ca.1000 maps);
Metsker's Atlas of Clackamas County Oregon, 1966 (1 volume);
Oregon City Topographical Maps, ca.1970 (1 volume);
PH [Pigeon Hole Maps-Miscellaneous Rolled Maps-includes road, road survey, railroad, Oregon Territory, etc.-with index], ca.1838-ca.1992 (15 inches of aperture cards);
Quad Maps [Quadrangle], ca.1956-ca.1985 (ca.40 maps);
West Linn Willamette Area [Assessor's Plats], 1957 (1 volume).

Records at the Clackamas County Sunnybrook Service Center, Surveyor's Office Vault:
Index to File Drawers A Thru Z [indexes A to Z Letter Series maps, DTM plats, LP corner maps, and some surveys], ca.1853-ca.1985 (1 binder);
Metsker's Atlas of Clackamas County Oregon, 1951 (1 volume);
[Miscellaneous Maps and Plats-formerly "A-Z Letter Series," now "SN series"-includes road, bridge, subdivision, corner restoration, survey, and miscellaneous maps and plats], ca.1853-ca.1990 (ca.1000 maps and plats);
[Pigeon Hole Maps-Miscellaneous Rolled Maps-includes road, road survey, railroad, Oregon Territory, etc.-with index], ca.1838-ca.1992 (ca.300 maps);
Railroads [Map Card Index], ca.1890-ca.1967 (.10 cu.ft.).

Records at the Clackamas County Sunnybrook Service Center, Planning Office Phone Room:
Airport [Maps], 2002 (1 volume);
Flood Boundary and Floodway Maps, 1987, 2000 (.50 cu.ft.);
Flood Plain Maps Clackamas Molalla [on aerial photograph base], n.d. (1 volume);
Geologic/Geo Hazards [Maps-rolled], 1979 (11 maps);
Topo Maps Clackamas County [USGS Topographical], 1980-1988 (1 volume);
Willamette Greenway Boundaries [Maps], n.d. (1 volume).

Records at the Clackamas County Sunnybrook Service Center, Engineering Office:
County Shop Bldgs. [Building Plans], ca.1965-ca.1983 (ca.250 drawings);
Courthouse [Plans-includes remodeling], 1954-1959 (ca.100 drawings);
[Road Engineering Case Files-includes copies of deeds, road vacations, subdivision and partition plats, maps, plans, easements, legal descriptions, and related records], no. 12001-62011, ca.1853-present (24 cu.ft.);
Road Files By Number [Road Engineering Case Files-includes copies of deeds, road vacations, subdivision and partition plats, maps, plans, easements, legal descriptions, and related records], no. 12001-73001, ca.1853-ca.1997 (40 inches of microfiche);
Water District [Plans-includes Milwaukie and Clackamas], ca.1964-ca.1969 (ca.100 drawings).

Records at the Clackamas County Sunnybrook Service Center Basement Shared Storage Cage, County Parks Area:
[County Parks Plans and Drawings-includes parks, Stone Creek Golf Course, etc.-rolled], ca.1990-present (ca.150 maps).

Records at the Clackamas County Elections Office:
Clackamas County Voter Precincts [Wall Map], 2002-present (1 map);
[Voter Precinct Maps], 2002-present (.15 cu.ft.).

Records at the Clackamas County Archives:
[Assessor's Plats-includes sales data], ca.1959-ca.1965 (16 volumes);
Atlas of Clackamas County [Assessor's Office], 1966 (1 volume);
[Atlas of Clackamas County Election Districts], ca.1932 (1 volume).

Records at the Museum of the Oregon Territory, Library:
Metsker's Atlas of Clackamas County Oregon, 1937 (1 volume); 1968 (1 volume).

Records at the Museum of the Oregon Territory, Artifacts Room:
Fire Insurance Rate Map [Sanborn], 1925 (2 volumes).

Records at the Clackamas County Web Site:
Clackamas County CMAP Database [GIS mapping system includes layers for many boundaries, districts, streams, tax lots, zoning, and other subjects], n.d.-present (Internet);
Election Maps [includes districts and precincts], ca.2000-present (Internet);
On-Line Atlas [includes fire districts, watersheds, school districts, relative populations, population density, average rainfall, and public lands], n.d.-present (Internet).

Records at a Related Web Site:
Tax Assessment GIS Maps [www.ormap.org], n.d.-present (Internet).