[A] planned bicycle lane has the dog community in an uproar. City engineers are finishing designs for a three-mile bike lane along the L.A. River in the Sepulveda Basin. The lane would take out a sliver of the 6-acre dog park, according to city officials. … The dog owners want the bike path moved to the south side of the river, where there is empty land and baseball fields. More than 2,000 people signed a petition asking City Councilmember Imelda Padilla to change the route. River advocates and neighborhood councils have joined in, criticizing the cost and location of the $58.4-million bike lane and greenway project. … The city last month also released the latest version of the “Vision Plan” for the basin, a planning document that seeks to transform the 2,000-acre flood-plain area over 25 years.