Surveying and Geomatics

Abernethy Creek Bridge Replacement

The new Abernethy Creek Bridge in Oregon City, Ore., replaced an 80-year-old timber structure that was deteriorating and severely weight restricted. A critical project goal was to preserve the Oregon City’s history while providing adequate capacity to serve future needs.

The replacement bridge is about three times as wide as the original structure and incorporates four travel lanes, bike lanes, and a sidewalk. The DEA team worked with a citizen task force to design the bridge railing to complement the character and create a fitting entry to the historic downtown.

The project also improved the health of the creek and the surrounding environment by collecting and treating stormwater that previously drained into the creek. DEA also reduced the number of piers in the floodplain and enhanced the riparian habitat surrounding the bridge.

DEA provided preliminary engineering, construction engineering, NEPA environmental assessment, surveying, traffic engineering, and public involvement services.