Dig to benefit fish makes progress in Troutdale
Inside a 40-foot pit beneath Southeast Stark Street in Troutdale, a half dozen workers in hard hats are busy gouging the gorge.
Following orders from the Feds, Multnomah County has targeted Beaver Creek for streamlining efforts that should help native salmon and other species swim up the river.
In practice, that means rebuilding the concrete culverts — a glorified word for fish pipe — that channel the creek when it passes under manmade barriers, like the two-lane arterial in near Mt. Hood Community College.
Workers have already removed at least 15,000 cubic yards of dirt from the stretch of Stark between Kane Drive and South Troutdale Road, carving a hole 150 feet across. And they're not done yet.
"Demolition is definitely a lot faster than placing," notes Road Engineer Carrie Warren. "A lot of people who drive by don't even know that (Beaver Creek) is here."
On Wednesday, Aug. 9, crews focused on the west footing, the concrete-and-rebar foundation that will hold the semicircle top of the culvert in place.
"(The footing is) so it doesn't turn or twist or shear or break," Warren explains.
The culvert project is expected to consume roughly 10,000 pounds of rebar, employ about 100 people and cost the government and public approximately $2.1 million by the time construction wraps in early October.
It's laying the literal groundwork for future road widening that should expand Stark Street to four lanes by 2019. Also on the radar, county officials know they'll need to rebuild other inadvertent blockages in culverts beneath Cochran and Troutdale roads.
Beaver Creek, which feeds into the Sandy River, is aptly named. The crafty animals almost flooded out Cochran Road a few years ago by blocking the box culvert with a dam.
The new arched culvert will be roughly 40 feet wide and 20 feet high at its apex, with no change in elevation to impede fish. The previous culvert used a concrete fish ladder that became an impassable barrier after heavy flows created a steep grade. When rebuilt, the channel will open up five miles of water to fish living in the nine-mile-long stream.
The new project will use 22 boulders, some the size of a Volkswagen Beetle, to mimic a natural streambed.
"It's so the fish can rest and hide," says project manager Sara Jeffrey.
"(From the fish's perspective) it's like they're just going up the creek: 'It's dark over our heads,'" Pullen explains.