BPA Pearl - Marion Emergency Landslide Repair - Aquatic Contracting

Wilsonville, OR

Working under our existing Access Roads Master Agreement with Bonneville Power Administration, Aquatic Contracting (AC) responded to an active landslide on the Pearl-Marion transmission line near Wilsonville, Oregon.

AC constructed almost 3000 feet of access road, installed and removed 1500 feet of crane mats for temporary access through an orchard, and stabilized the active landslide with 7000 tons of imported rock and boulders. AC also effectively addressed erosion/sediment concerns by installing sediment barriers given the proximity of slide material to an adjacent stream.

After the landslide was stabilized, AC conducted site restoration efforts that included removing the temporary crane mat access road and then importing 200 yards of topsoil to address landowner soil compaction concerns and hazelnut harvest requirements for smooth soil surface through the orchard. Challenges included timeline, site access, and safety concerns while stabilizing an active landslide. AC worked closely BPA’s engineer and onsite inspector, mobilizing staff and equipment immediately after being contacted by BPA.

Challenges included timeline, site access, and safety concerns while stabilizing an active landslide.

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