address accumulated sediments, collapsing shorelines, reduced water depth, Raymond aquifer recharging, and the threatened aquatic ecosystems of Baldwin Lake and adjacent Tule Pond. A preliminary study identified several factors that negatively impact Baldwin Lake. Since the early 1950s, the Lake has functioned as a collection basis for of urban watershed to the north. The runoff carrying petrochemicals and other contaminants into the pond, combined with ongoing siltation, has degraded its aquatic ecosystems. The pond was originally deep, but now has an average depth of . The Arboretum began fundraising for an engineering study to determine the best approaches to restoring Baldwin Lake and Tule Pond. See also Baldwin Avenue Railway Station National Register of Historic Places listings in Los Angeles County, California References Lakes of Los Angeles County, California Arcadia, California Geography of the San Gabriel Valley Tributaries of the Los Angeles River