Two excavators work together to install boulders next to the slope of a riverbank. One excavator sits at the top of the riverbank slope while the other sits next to a trench at the bottom of the slope. Three construction workers can be seen standing at the edge of a trench in the background. A river flows downstream past rounded streambed rocks. Larger levee rocks, a forest, and mountains can be seen in the background. An excavator lifts a large boulder and prepares to install it in a ditch. A loader operator can be seen in the operator's seat. Large boulders are stacked on top of each other to create a deflector next to the Nisqually River levee. Large, stacked levee rocks rest above a sandy shoreline along a river channel. Granite rocks in a heart shape rest in the dry sand of shoreline along a river. Levee rocks can be seen in the background. An excavator works with large boulders near the the edge of a wide, dry river bed. A row of stacked levee rock lines the edge of a flowing river. An excavator, wheel loader, and bulldozer work along the slope of a riverbed. A deflector built of large levee rock and rootwad anchors can be seen jutting out from a rock-armored slope in the foreground. A deflector made up of large rocks, rootwad anchors, and thin logs juts out into a dry riverbed. Logs lie in a pile in front of a wall of large levee rock. A river flows downstream on the left side of the logs and levee rock. A deflector made of large rocks juts out into the path of a dry riverbed. A snow-dusted mountain can be seen in the background above a forest. A line of stacked levee rocks contrasts with forested mountains in the distance. A sandy shoreline can be seen at the bottom of the wall of levee rocks. A row of stacked levee rock lines the edge of a flowing river. A forest and mountains can be seen in the background. A slope of levee rock can be seen in the foreground with a dry river valley in the background. In the distance, an excavator, wheel loader, and bulldozer can be seen working along the slope of the riverbed. A river flows downstream through a rocky river valley.

Nisqually River Retrofit

Date: August-October 2021
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Description

The Upper Nisqually River Levee Retrofit adds deflectors to the bank of the river. The deflectors reduce water velocity and direct water away from the shoreline, slowing shoreline erosion and reducing damage to the levee. Washington Rock provided materials to contractor Active Construction.

Materials

6,730 tons of Levee Rock
1,380 tons of 1¼” Minus Tailings, Grade 1
150 tons of CSBC

Highlights

Washington Rock produced nearly 7,000 tons of oversized quarry rock especially for this project. Each rock weighed between 6 and 15 tons, more than double to quadruple the size of the largest quarry rock typically offered. We are one of the few mines in the region that can produce boulders on demand at this size and with the correct specifications.

Read more about this project on the National Park Service website.

Photos from October 2021 are shown alongside photos from October 2022.

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