3-Bat Cupola Specs DQ1 2026-0355.pdf

This is a technical specification document for the Colorado Inactive Mine Reclamation Program, detailing requirements for a bat cupola installation designed to provide habitat access at mine shaft locations. The specification outlines a shaft grate modification with an alternative bat cupola featuring grating constructed of 1 1/4" x 3/16" bearing bars spaced at 1 3/16" on-center, with 1/4" round cross rods positioned at 4" on-center in type WXA (19-4-53) configuration. The cupola frame consists of 2"x2"x 1/4" angle iron, welded to create a framed opening in the existing shaft grating that measures 24" minimum in height. The cupola grating shall extend a maximum of 6" above the shaft grating and be tack-welded at every other bearing bar to the grate frame, with cross rods positioned on the inside of the opening frame side.

No information regarding pricing, set-asides, contract terms, funding sources, or procurement timelines is contained within this technical specification document. This file represents only the engineering and design requirements for the bat cupola component and does not include solicitation details, bid submission procedures, or contract award information.