3-Bat Cupola Specs DQ1 2026-0355.pdf

This document contains technical specifications for a bat cupola component as part of the Colorado Inactive Mine Reclamation Program, related to the PKAA Dream Canyon Project in Colorado. The specification details the construction requirements for a shaft grate with bat alternative bat cupola grating, which includes bearing bars measuring 1 1/4" x 3/16" spaced at 1 3/16" on-center, 1/4" round cross rods positioned at 4" on-center, and type WXA (19-4-53) grating material with tack welding on alternating bearing bars to the grate frame. The cupola frame consists of 2"x2"x 1/4" angle iron, with a 6" maximum cupola grating height and a 24" minimum opening frame, designed to be welded to the shaft grate opening.

The specifications provide detailed dimensional requirements and construction methodology for the bat cupola installation, including plan and side view diagrams illustrating the proper positioning and assembly of components. The opening in the shaft grate must be framed with 2"x2"x 1/4" angle material, with the bat cupola welded to this framed opening and positioned to extend above the shaft grating. This component appears to serve dual functionality in mine reclamation work while providing habitat accommodation for bats, though the document contains no pricing information, schedule details, bidding requirements, or contract terms.