Tellruide, Colorado, has a problem with poop.

Dog poop.

A local biologist, Ramona Gaylord, told city council that the impact of waste produced by 100 dogs located within a 20-mile radius of a watershed draining to a small coastal bay would contribute enough bacteria and nutrients to temporarily close it to swimming and shell fishing after two to three days, according to the U.S. Environmental Protection Agency.

A new form from the Marshal’s Office is due to come into circulation soon. It will enable passersby to document occasions on which they witness owners neglecting their doodie duties. By signing the form the complainant agrees to be called as a witness if a ticket is issued and the matter goes to trial.

So pick up your poop.

And if you find some old poop, send it to University of Oregon archeologist Dennis Jenkins.

Jenkins found 14 feces, or coprolites, in the Paisley caves in south-central Oregon. He reported in Science on Friday that the oldest piece of crap in the collection was 14,300 years old.

Eske Willerslev, a Danish expert in ancient DNA and one of the authors of the paper, said genetic material found in the ancient poop suggests the earliest known North Americans came from Asia and Siberia, and were the ancestors of modern native peoples

As they sing on Scrubs, Check the Poo.