Portland Benchmark - CL B Number 2223 - U.S. Benchmarks on Waymarking.com

Located at the intersection of SW Park and SW Alder Streets.

The mark is in the curb of the southwest corner approximately 8 inches above the roadway and two feet from a streetlamp Following is the information found at the City of Portland's "Online Benchmark Book" (visit link)

Bench Number 2223
Elevation 58.346
Street 1 ALDER ST
Street 2 PARK AVE
District SW
Description SW COR.; 4'S.
Quarter Section 3029, 1N1E34C

The City of Portland also supplies a Google Earth KML file of all of their benchmarks. (visit link)


It is interesting to note that the City of Portland uses its own datum.

From History of the City of Portland's datum:

"The City of Portland datum is based upon a survey done in 1896 by The Northern Pacific Railway and has remained unchanged for over one hundred years. Despite the many adjustments made to the US Geological Survey’s datum during the same period, the Portland City Council found that it lacked the resources to keep up with the changes and chose to disregard their findings. Ironically, the adjustments to the US Geological Survey’s datum incrementally approached the City’s datum so that today there is only a difference of 1.375’."

Complete History (visit link)

Condition: Mark found in good condition Designation: CL B Number 2223 Benchmark Agency: other (not included below) Benchmark Agency (if other): City of Portland (OR) Monumentation type: BENCH MARK (or B.M.) Disk County: Multnohmah USGS 7.5' Topographic Quadrangle Name (optional): Portland Quad Special category (optional): Not listed Find type: Found by luck/skill/knowledge Local database's URL (optional): [Web Link] Monumentation type (if other): Not listed Special Category (if other): Not listed Web address of this benchmark's datasheet (optional): Not listed NGS PID: Not listed

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