Mariposa Grove Storm Damage Repair – Reconstruction of Lower Grove Comfort Station (2021 to 2022) - Yosemite National Park

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The January 2021 Mono Wind Event caused widespread destruction across Yosemite National Park as powerful gusts toppled hundreds of trees. Among the damaged structures was the Lower Grove Comfort Station, originally built by Treeline Construction Inc. and completed in 2017. A massive 48-inch-diameter Sugar Pine fell directly onto the building, causing severe structural damage that required approximately 75% reconstruction, including replacement of walls, heavy timber framing, utilities, roofing, and siding. The foundation remained intact, and some of the original walls were salvageable.

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Treeline was called in the day after the storm to remove the fallen tree and stabilize the building before further deterioration could occur. With winter conditions still ahead, the team acted quickly to waterproof the structure—installing temporary rafters and a protective roof covering to prevent additional damage.

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While the site was secured, Treeline developed a detailed feasibility and reconstruction plan to restore the comfort station. By fall 2021, we were contracted to complete the rebuild. The work required careful demolition and replacement of shattered post-and-beam framing, including massive 27-inch timbers that had to be individually removed, shored, and reconstructed.

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Treeline self-performed all aspects of the rebuild, including Divisions 1 through 9, quality control, safety, and project management. The project was completed in six months, restoring the comfort station to full function and preserving its place within Yosemite’s iconic landscape.