County outlines landfill post-closure funds, plans for vertical wells and Cell 10
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Summary
Public Works and finance staff told the board that solid-waste operations have strong cash balances but large, long-term closure liabilities; staff described near-term capital work including vertical gas wells and engineering for Cell 10 and summarized post-closure funding and legal/permit horizons.
Public Works Director Sean Roey and county finance staff told the Board of Commissioners Monday that the county’s solid-waste enterprise has large cash balances but also substantial long-term closure and post-closure liabilities that drive transfers and reserve requirements.
Roey said the operational fund had a current cash balance of about $7.7 million and that several restricted funds collectively hold tens of millions: the L fund ($17.1 million), Tenant Way lined closure fund ($8.85 million), Tenant Way unlined ($0.9 million), headquarters closure fund ($24.76 million) and headquarters post-closure fund ($8.76 million).
What staff told the board: - For 2024, staff accrued about $3.4 million back to the prior year; actual cash receipts to date for the main fund have been roughly $9.84 million, which staff said is on track on a cash basis. - Near-term capital: the county expects to install vertical gas wells in August or September — roughly two dozen vertical wells across closed cells — with an estimated cost of about $1.7 million for the vertical-well project. Cell 10 design work is at roughly 60% and staff estimated Cell 10 construction at about $700,000 for the cell design cost noted in the capital budget and suggested a later construction estimate in the multi-million-dollar range (board discussion referenced a $14 million range for a future cell construction scenario). - Land rent to the general fund: the county uses a historical 6% return-on-value calculation to set the annual rent the landfill pays to the general fund. Finance staff said auditors require consistent application of that method and that the county adjusted the rent with an inflationary factor during the last budget cycle. Commissioners discussed whether market interest-rate changes require re-evaluation; staff said auditors prefer consistency in the calculation but that the method could be revisited if warranted. - Post-closure liability example: staff cited an estimated full closure and post-closure liability for Headquarters Basin 1 of about $128 million as a long-run planning figure; staff said transfers and annual financial-assurance (FA) work help ensure funds are available when work is required.
Legal and permit horizons: staff said Tenant Way requires a minimum 30-year post-closure responsibility and headquarters permits specify 55 years of responsibility (with potential to extend depending on site conditions). The county evaluates closure costs basin-by-basin and updates cost projections when closures or significant work are undertaken.
Discussion versus decisions: this was an informational presentation. Commissioners asked about the sufficiency of funds in a worst-case closure scenario and staff responded that current restricted balances would cover closure for currently open areas. Staff reiterated the county’s conservative valuation approach for the rent calculation and said the county will continue to document methodologies for auditors.
Next steps: staff will proceed with engineering and procurement planning for vertical wells and continued design work on Cell 10, and will present any significant budget or contract requests to the board as required.
