Public works outlines sewer-pond changes, irrigation-valve upgrades and impact-fee uses

Public works staff told the Gunnison City Council that wastewater treatment operations require reconfiguration after lab results showed elevated organics in one treatment cell.

Staff said they are splitting inflow so roughly half goes to the primary pond and half to a secondary pond; the department may use two or three primary ponds going forward to reduce loading on any single cell. Officials said the change is operational — not a budget reduction — and that additional pond use will not immediately reduce chemical or operating costs.

Councilors asked whether using additional ponds would reduce chemical use; staff said separating organics across ponds addresses loading limits but does not eliminate treatment requirements.

Public works also reported that irrigation-valve installations were arriving and that large valves and smaller valves were being installed this week to prepare for irrigation season. Staff described irrigation-meter installation as progressing well and said the work is easier when daily shutdowns are not required.

Staff updated the council on recent construction coordination: Blue-stake marking limitations were discussed after a near-term excavation at a private property caused concern when lines were not clearly marked and the work schedule allowed little notice to property owners.

Why it matters: Treatment-plant configuration affects effluent management and operational workload; irrigation infrastructure work affects parks, rights-of-way and water delivery ahead of irrigation season.

What’s next: Staff will monitor pond loading and, if necessary, convert a third pond to primary service; irrigation and meter installations will continue and crews will coordinate notification and marking protocols with property owners.