Douglas County reminds residents to prep loads for slash-mulch site
Nails, wire and construction debris can get a slash-mulch load turned away at Douglas County’s Sedalia site, where resident-only drop-offs are accepted on Saturdays.
Loads headed to Douglas County’s slash-mulch site can be turned away if residents leave nails, wire or construction debris in the pile. The county opened its 2026 site at 5675 Delva Way in Sedalia after the old Castle Rock location closed, and it is limited to Douglas County residents.
Staff are on site to direct traffic, and message boards guide drivers into the new location. Residents should bring proof of residency, separate slash from green yard waste and call ahead during inclement weather at 303-548-7810 to make sure the site is open. Drop-offs are allowed only while the site is open and staffed, and contractor drop-offs are not permitted.
The county’s updated accepted-items list includes tree limbs, pine needles, shrubs and brush, grass or hay, sod, leaves, sawdust, weeds and pinecones. Items that are not accepted include appliances, fencing, household trash, lumber, pallets, railroad ties, tree or bush roots and stumps, plus contaminants such as garden waste, large brush, trash, twine, plastics, metals, rocks, tape and weed barriers. Covered loads are required.
Douglas County opened the seasonal site Friday, April 3, 2026, and expanded hours for the first two weekends by opening on both Friday and Saturday from 7 a.m. to 5 p.m. to handle demand. Regular operations then returned to Saturdays only through Oct. 31.
Material collected at the site is professionally composted or turned into free mulch for residents instead of going to a landfill. In 2025, Douglas County residents converted 32,841 cubic yards of tree limbs and yard debris into mulch, roughly the volume of 10 Olympic-sized swimming pools.
The Sedalia site is also the planned home of GreenWorks, a centralized waste hub that will eventually combine slash-mulch and green yard waste collection with electronics recycling, household hazardous waste disposal and a biochar facility. Douglas County projects GreenWorks will expand collection from 30 days to 300 days a year and save taxpayers more than $400,000 annually. Douglas County’s planned biochar facility will be the nation’s first county-owned and operated facility of its kind, part of a broader wildfire-mitigation effort.
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