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Marathon County staff outline winter-spreading proposal, estimate phosphorus reductions and costs for new manure storage
Summary
County staff presented detailed analysis of winter-spreading restrictions, estimating roughly 62 farms could be affected, potential phosphorus reductions from a 60-day ban, and storage cost ranges; committee directed staff to continue stakeholder outreach and return with more data.
County planning and zoning staff presented updated analysis Feb. 4 on potential amendments to Marathon County’s animal waste ordinance, focusing on proposed winter-spreading restrictions and options for affected farms.
Kirsty (CPZ staff) told the Environmental Resources Committee that the department has moved away from animal-unit categories toward watershed-based or geographically targeted restrictions and that staff had performed a deeper review of farm demographics since the committee’s January discussion. Matt Repking (CPZ) presented farm-level data: of roughly 348 dairy farms in Marathon County, about 198 have some manure storage and approximately 150 do not. Using a subsample of 22 farms that had nutrient management plans, staff estimated that about 41% of that subsample spread liquid manure in winter months; extrapolated countywide, staff estimated roughly…
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