Atch_4_SOW_8_4_APPROVED_GRAVEL_and_SOIL_SOURCES.docx

This is an approved vendor list for materials sourcing associated with the Amis Diablo East Radio Tower replacement project at Amistad National Recreation Area. The document specifies pre-approved suppliers for gravel and soil materials required under the solicitation 140P1226Q0045, issued by the Department of the Interior National Park Service Intermountain Region.

The approved vendor for sand and gravel is 90 West Contractors, located at 813 Hackberry Lane, Del Rio, Texas, with contact phone number 830-774-3596. This vendor list was established as of March 13, 2026, and serves to streamline procurement for material sourcing on this federal construction project. Contractors responding to this solicitation are expected to source gravel and soil materials from the identified approved suppliers rather than pursuing alternative vendors.