Attachment_D_-1992_Landfill_Cap_Construction_Cross_Section.pdf

This is a cross-section technical drawing document for the 1992 Landfill Cap Construction at the closed Verona Landfill, managed by Dane County's Department of Waste & Renewables in Wisconsin. The drawing provides detailed engineering specifications for the landfill's cap construction, illustrating the layered composition and structural design of the closure system. This technical documentation supports the current Infrastructure Upgrades and Solar Array Installation project at the facility, which encompasses two response categories: Category 1 for Landfill Infrastructure Upgrades (including site assessments, permitting, and construction oversight) and Category 2 for Solar Design, Construction, and Operations. The project targets development of a 3.0 MW solar array system across approximately 50 acres utilizing four specific parcels. The Request for Proposal was released on December 18, 2024, with a questions deadline of February 4, 2025, and proposal submissions due February 18, 2025, at 2:00 pm. Proposers may respond to one or both categories. The contract term is proposed for a maximum of five years, with a land lease minimum of 20 years and extension options available.

The cross-section drawing is essential for understanding the existing landfill infrastructure that the solar array installation must integrate with, including the leachate collection system and landfill gas collection system currently in place. The technical specifications illustrated in this document inform the design requirements for the solar array installation, particularly regarding ballast-design array anchors and structural considerations necessary to maintain the landfill's environmental integrity. Wisconsin Department of Natural Resources (WDNR) approvals will be required, leveraging potential funding from the Inflation Reduction Act's clean electricity production credits with emphasis on brownfield development bonuses. All renewable energy credits will be assigned directly to Dane County, with the solar array designed to replace declining landfill gas electrical generation and support increasing electrical demand from county operations.