Heart_Butte_Dam_2024_Final_Design_Geologic_Investigations_0002.pdf

This document is a Geologic Investigations report for the Heart Butte Dam 2024 Final Design project. The report supports the Department of the Interior Bureau of Reclamation's solicitation (140R6026R0004) for dam safety modifications at Heart Butte Dam. The geologic investigations provide critical subsurface characterization data including borrow material testing, conduit sediment analysis, and geotechnical laboratory testing required to inform the final design modifications. The work encompasses laboratory analysis of core samples and soil materials, geological mapping, and technical documentation necessary for contractors to develop comprehensive design solutions for the dam safety project.

This supporting documentation is referenced in conjunction with the main solicitation package, which includes detailed drawings (03B_00 00 02_Drawings 11x17) and the Geology Package (Revised 04-21-2026). Contractors responding to solicitation 140R6026R0004 should reference this geologic investigations report along with the 2018-2021 Heart Butte Dam Corrective Action Study Geologic Exploration Report and related geotechnical testing reports (including conduit sediment analysis, borrow material testing, and laboratory support documentation) available upon request from Contracting Specialist Mitchell Frost at mitchell_frost@ios.doi.gov. The complete solicitation details are contained in the primary solicitation documents dated 4.24.26 and associated technical packages.