Boulder has published city manager's rules that define what, exactly, constitute bear-resistant trash containers and enclosures.

An ordinance adopted in March requires everyone living west of Broadway and south of Sumac Avenue to use bear-resistant trash cans or keep their trash in secure enclosures at all times.

Enforcement will start this summer in central Boulder in areas with alley trash service. The fine for non-compliance is $250.

The ordinance's goal is to reduce the incidence of bears living in town and eating trash. Four bears were killed in Boulder last year.

Boulder's bear rules

Boulder's complete rules on bear-resistant trash are available at boulderwildlifeplan.net. Boulder is accepting comments on the rules until 5 p.m. May 13. Comments can be sent to Urban Wildlife Conservation Coordinator Val Matheson at mathesonv@bouldercolorado.gov.

The rules describe what enforcement officers will be looking for from residents.

A "bear-resistant container" must have a certification from the Interagency Grizzly Bear Committee that its design has withstood an hour of sustained bear assault without breaking.

There are several commercially available bear-resistant containers.

Western Disposal CEO Frank Bruno said a retrofit of the company's 64-gallon container recently passed the testing protocol, and its 32-gallon container, which is the most popular size, and the 96-gallon container are scheduled for testing soon.

Bruno said he should have final pricing information in a few weeks.

"The whole goal of doing this was to reduce the cost to our customers, make this a little easier for the city to implement and make sure we could make use of our existing carts," he said.

One Way Disposal is making a 32-gallon screwtop Bearicuda available to its customers for $69 or a $2.93 a month rental fee. At the end of two years, the customer would own the can and the rental fee would go away.

For an additional $10 a month, One Way also will retrieve trash directly from secure enclosures or even garages and sheds.

People who don't want to buy or rent bear-resistant containers or who don't have trash service at their homes can build an enclosure.

The rules say such an enclosure "shall be an enclosed structure, made of metal, wood, stone, brick, concrete or the equivalently sturdy material, consisting of five sides and a secure door or cover, which shall have a latching device of sufficient design and strength to prevent access by bears."

A garage or other building could count.

Contact Camera Staff Writer Erica Meltzer at 303-473-1355, meltzere@dailycamera.com or twitter.com/meltzere.