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City of Redmond Vertical Control

City of Redmond Vertical Control

DEA updated the City of Redmond’s vertical control network, originally established in 1989. The primary purposes of this survey were to change the vertical datum from NGVD 29 to NAVD 88, to set new benchmarks, and to replace damaged or destroyed benchmarks.

4-0 Ranch Boundary Survey

4-0 Ranch Boundary Survey

DEA performed a boundary survey for approximately 2.8 miles of the 4-0 Ranch which had been recently acquired by Washington Department of Fish and Wildlife.

Westside Trail Segments 1, 4, and 7 Route Survey

Westside Trail Segments 1, 4, and 7 Route Survey

DEA provided project management, land survey, environmental and land use permitting, master planning, utility coordination, preliminary engineering, and construction engineering services for segments 1, 4 & 7 of the Westside Trail, which connects the city of Tualatin with Portland’s Forest Park.

Big Eddy – Knight 500kV Transmission Line

Big Eddy – Knight 500kV Transmission Line

DEA provided the surveying and mapping services required for BPA and their Owner’s Engineer to design, acquire rights, and complete permits to construct a new 500kV transmission line from Big Eddy Substation, near The Dalles, Oregon, to the new Knight Substation near Goldendale, Washington.