CHEYENNE, Wyo. (AP) — Filters installed on storm drains in Wyoming's largest city will attempt to keep trash out of a creek.

Crews have installed 12 water filtration units called "Gutter Bins" on storm drains in downtown Cheyenne.

The Wyoming Tribune Eagle reports the Laramie County Conservation District, local Rotary clubs and Casper-based Frog Creek Partners took part in the project.

Brian Deurloo with environmental technology company Frog Creek Partners estimates 40 million cigarette butts litter Cheyenne annually.

He estimates around a million pounds of pollution wash into Crow Creek each year.

Each filtration unit costs about $700. Conservation district staff and Rotary volunteers will maintain the bins for the first couple years.

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