Work to remove a trail made of decomposed granite at Fairview Park started Friday, according to published reports.

A Huntington Beach environmental consulting firm was hired to remove the unpermitted trail work, which possibly harmed the habitat of an endangered species, officials said.

For about $14,000, Endemic Environmental Services will remove by hand the two decomposed granite trails that encroached on a vernal pool, potentially affecting the San Diego fairy shrimp's habitat. The U.S. Fish and Wildlife Service, after investigating the matter, directed the city in November to remove the trails as an "emergency action."

On Friday, "members of the city staff, U.S. Fish and Wildlife and contractors, including biologists, all arrived around noon at the site to discuss the proper method of removal and to begin the work," according to a report by blogger Geoff West on his site, A Bubbling Cauldron.

The trails are within the 208-acre park's southeastern edge, adjacent to Parsons Field and Jim Scott Stadium.

One of them, along the stadium fence line, was officially approved by the city years ago. The second was an undefined path. Each trail was topped with the decomposed granite and possibly widened, without city permission, sometime this summer. No one has taken responsibility for the work.