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Oregon Historical County Records Guide

Clackamas County Records Inventory

Maps, Plans, and Drawings

1850-[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 Development Services Building, Assessment and Taxation Office Suite 135, Cartography Area:
[Assessor's Maps-Current], n.d.-present (ca.3300 maps);
[Assessor's Maps-Retired], ca.2009-2013 (ca.1000 maps);
Old Sec. Maps [Section-Assessor's Maps]. ca.1959-ca.1970 (ca.500 maps).

Records at the Clackamas County Development Services Building, Assessment and Taxation Office Map Room 159:
Barlow Trail Historic Corridor Maps [Annotated Assessor's Maps-Government Camp to Oregon City], ca.1994 (1 volume);
Clackamas County Maps of State of Oregon Ownership in the Sandy River [includes aerial photo maps], ca.1989 (1 volume);
Formation Tri-Co-Met Tran Dist Ord #174 Work Maps [TriMet Transit District Maps-Ordinance-on assessor's map base], 1990-1992 (1 volume);
Metsker's Atlas of Clackamas County Oregon, n.d. (1 volume); 1966 (1 volume);
Old Maps [Assessor's], n.d. (1 volume);
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 Development Services Building, Surveyor's Office File Room 311:
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); 1966 (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.2000 maps and plats);
[Pigeon Hole Maps-Miscellaneous Rolled Maps-includes road, road survey, railroad, Oregon Territory, etc.-with index], ca.1850-ca.1992 (ca.300 maps);
Quad Maps [Quadrangle], ca.1956-ca.1985 (ca.40 maps);
Railroads [Map Card Index], ca.1890-ca.1967 (.10 cu.ft.).

Records at the Clackamas County Development Services Building, Planning and Zoning Office, File and Library Room 212:
Flood Plain Maps Clackamas Molalla [on aerial photograph base], n.d. (1 volume).

Records at the Clackamas County Development Services Building, Planning and Zoning Office Room 219:
Airport [Maps], 2002 (1 volume);
[Assessor's Maps-in hanging file cabinets-by township and range], n.d.-present (10 cu.ft.);
NWI [National Wetlands Inventory Maps-includes topographic maps], 1985-1986 (1 volume);
Willamette Greenway Boundaries [Maps], n.d. (1 volume).

Records at the Clackamas County Development Services Building, Planning and Zoning Office Suite 225, Public Research Area:
FIRMs [Flood Insurance Rate Maps], 2008 (1 cu.ft.).

Records at the Clackamas County Development Services Building, Engineering Office Plotter Room 345:
County Roads [Engineering Case File Card Index], ca.1853-n.d. (.50 cu.ft.);
Metsker's Atlas of Clackamas County Oregon, n.d. (1 volume);
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. 12001-72003, ca.1853-ca.1997 (40 inches of microfiche).

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, Halon Room:
Fire Insurance Rate Map [Sanborn], 1925 (2 volumes).

Records at the Clackamas County Web Site:
CCSIS [Clackamas County Surveyor Information System-GIS database-includes corner survey, Donation Land Claim, private survey plat, subdivision plat, partition plat and related information], n.d.-present (Internet);
Clackamas County CMap [GIS mapping system includes tax maps, aerial photographs, assessment and tax data, and related information], n.d.-present (Internet);
Congressional District Maps [Election], n.d. (Internet);
Forest Land Ownership in Clackamas County [Map-PDF], 2011 (Internet);
Online Atlas [Map Collection-includes earthquake hazard, wildfire hazard, fire districts, watershed, school districts, population, rainfall, and public lands], n.d.-present (Internet);
Precincts and their Districts [Election Maps], n.d. (Internet);
Urban and Rural Reserves [includes map], 2010 (Internet).

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

Oregon Secretary of State • 136 State Capitol • Salem, OR 97310-0722
Phone: (503) 986-1523 • Fax: (503) 986-1616 • oregon.sos@state.or.us

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