Randal Corral - Letter of Recommendation

To Whom It May Concern,

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It is with confidence that I recommend Treeline Construction, Inc. as a contractor well-suited for

projects requiring a high degree of care, craftsmanship, and coordination-particularly in

historically significant and environmentally sensitive settings. I have worked with Treeline on

multiple efforts in Yosemite National Park, most recently the rehabilitation of the Yosemite

Valley Welcome Center.

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Treeline has consistently delivered work of exceptional quality. Their attention to detail in both

rough and finish carpentry is evident in the results, and their quality control systems are well established and effective. They understand the unique requirements of working within National

Parks, including how to adapt to the challenges of remote locations and active visitor areas.

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Their team is collaborative, flexible, and solution-oriented-traits that have helped keep our

projects on schedule even when confronted with unforeseen conditions. Treeline frequently

offers proactive alternatives that reduce additional costs without compromising quality or intent, and they submit change orders only when truly necessary. Their pricing has been fair and transparent, and their field leadership demonstrates a strong understanding of both regulatory compliance and the logistical realities of park construction.

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Most importantly, Treeline brings a high level of professionalism and integrity to their work.

Their ability to maintain positive relationships across project teams-including NPS staff,

subcontractors, and other stakeholders-has made them a reliable and valued partner.

I would not hesitate to work with Treeline Construction again and recommend them for similar

work across the National Park system.

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Sincerely,

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Randal Corral

Contracting Officer's Representative

National Park Service