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County Surveyor Plat Information

Standard Monument Boxes

No substitutions allowed.

In accordance with the Clackamas County Code, monument boxes are required for all public land corner monuments that fall within paved areas and also for centerline monuments within or, if applicable, outside the boundary of subdivision, partition and condominium plats.

The following monument boxes (frames) and covers have been approved for use in Clackamas County:

  • 8" inch frames and covers - are typically acceptable for most local streets (subdivisions) with speeds of less than 35 miles per hour.
  • 12 " inch frames and covers - are required for streets or County Roads of a higher speed classification (speeds over 35 miles per hour).

East Jordan Iron Works, Inc.
Frank Ray, Sales Representative - Northwest Branch
13127 State Ave.
Marysville, WA 98271
Cell 503-774-4144
Fax 360-651-6150

  • Product number 00368005 for 8" Monument Frame and Cover
  • Product No. 00367311 12" x 7-7/8" Monument Frame (catalog #3673Z)
  • Product No. 00367323 Monument Cover with drop handle (catalog #3673A)
  • Paving riser rings available

Olympic Foundry Inc.
6530 NE 42nd Ave.
Portland, OR 97218
Fax 503-284-5880

  • Pattern No. M1010 for 8" Monument Frame and Cover
  • Paving riser rings available
  • Part No. 14-6329 for 12" Monument Frame
  • Part No. 14-6338 for Cover


150 Beavercreek Road Oregon City, OR 97045

Office Hours:

⚠ We are open to the public with limited hours

Monday - Thursday
9 a.m. to 2 p.m.