[3] The Pilchuck River has sections that have long stretches of gravel bars as well as glacial terraces.

[8] Suburban development along the river's course in the mid-to-late 20th century resulted in declining salmon runs and the placement of obstructions that damaged fish habitats.

[9][11] Additional work to create new fish habitats in the river by placing logs tied to large rocks began in 2024.

[9] The Pilchuck River Dam was constructed in 1912 southeast of Granite Falls to provide drinking water for parts of Snohomish.

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