3-Bat Cupola Specs DQ1 2026-0355.pdf

This is a technical specification document for the Colorado Inactive Mine Reclamation Program related to the PKAA Dream Canyon Project in Colorado. The document provides detailed specifications for a bat cupola installation designed to fit within a shaft grate system. The bat cupola assembly consists of a 2"x2"x 1/4" cupola frame that protrudes a minimum of 24 inches above the shaft grating and includes specific grating components: 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, utilizing type WXA (19-4-53) material with tack welds securing every other bearing bar to the grate frame. The opening in the existing shaft grate must be framed with 2"x2"x 1/4" angle iron, with the bat cupola welded to this framed opening, and the cupola grating positioned on the interior side of the cross rods.

The specification document does not contain pricing information, contract award dates, response deadlines, set-asides, funding sources, or other contractual terms. This is a purely technical specification sheet that establishes the design and construction requirements for the bat cupola component as part of the mine reclamation work. The document includes side view and plan view diagrams illustrating the proper positioning and assembly of the cupola frame relative to the existing shaft grating infrastructure.