Kennewick will use a fleet of lawnmowers with horns and hooves to tame the weeds in Zintel Canyon over the next 10 days.
About 200 goats will be unleashed on fenced sections of the park which runs north and south between Ely and Vancouver streets, beginning May 8, a release from the city said.
Canyon users should take care when near the herd and dog owners are reminded to keep their dogs leashed at all times when in the park.
The herd belongs to Healing Hooves, a vegetation management company out of Edwall. Along with being more environmentally friendly and efficient, the goats can more easily get to weeds in difficult to access portions of the park, which has wetlands and wildlife, said city officials.
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Notices will be posted at each end of the Spirit of America Trail through the canyon and some side trails will be closed during part of the 10 days. The herd will be confined by electrified fencing and monitored by managers when grazing.