Ash Tree Treatment

City of Aurora, Colorado is soliciting bids under Invitation for Bid B-4799 for ash tree treatment across approximately 4,700 trees for the Aurora Parks, Recreation & Open Space Department, with written questions due November 6, 2026 and bids due November 13, 2026 at 2:00 p.m. MT. The solicitation specifies no set-asides. The source also tags the opportunity to Douglas County and three Aurora City jurisdictions.

The scope is a preventive program focused on healthy, mature trees in historically significant and strategic locations across parks, streetscapes, and public facilities. Work uses two methods: trunk injection with Emamectin Benzoate (minimum 4% active ingredient) and soil drenching with Dinotefuran (Safari or Transect formulations). Applicators must hold a valid Qualified Supervisor license from the Colorado Department of Agriculture. Personnel must complete manufacturer-specific training and wear company-identifying uniforms. Contractors must comply with OSHA and EPA pesticide application requirements.

The City allocates a total project budget of $125,000 to treat the maximum number of eligible trees within available resources, and funding is available only for the current calendar year. Pricing is submitted per DBH-inch for each method and must include materials, labor, and equipment, excluding taxes. Trunk injection pricing is the primary basis for selection because maximizing trees treated by that method is a stated objective. Soil drenching is secondary and applies to smaller trees only. The contract goes to the lowest responsible bidder. Work is estimated to run from November 30, 2026 through June 2027, under an initial one-year term with four additional one-year renewal options. Required insurance includes $1,000,000 per occurrence commercial general liability, $1,000,000 combined single limit commercial automobile liability, and workers' compensation under Colorado law, with the City named as additional insured. The awardee must obtain an Aurora Business License within thirty days of award. Payment is typically processed within 30 days of invoice approval.

A pre-bid conference was scheduled for October 30, 2026 at 3:30 p.m. MT via Microsoft Teams. Bids must be submitted electronically through BidNet, and bid opening occurs via Microsoft Teams at 2:30 p.m. MT on November 13, 2026. The City reserves the right to reject any or all bids and to terminate the contract with or without cause.