Welcome

Arch Creek, in North Miami-Dade County, flows beneath a natural bridge

From Wikipedia here.

In 1957, the first of many threats against the future of the natural bridge materialized. The bridge was endangered by a plan to drain low lying areas as part of a flood prevention program. The Army Corps of Engineers wanted to blow up the bridge, or re-route the creek. A 1957 newspaper article announced that "the bridge must be sacrificed for better drainage of the area." Protests from members of the local Audubon Society, the Historical Association of Southern Florida and the Dade Conservation Council prevented any of this destructive action.

Things remained quiet until the 1970s, when Arch Creek became the property of the Chrysler Corporation. Their plans called for the construction of an automobile showroom, and a new and used car agency. In 1972, Chrysler requested a zoning change from the City of North Miami, which would have allowed them to pave the area and build a garage on the property. Vigorous opposition came from the Tropical Audubon Society, the Miami-West India Archaeological Society, the Keystone Point Homeowners' Association, and the members of the Arch Creek Trust. After almost a year, of intense lobbying the State of Florida agreed to purchase the land for a state park. The State's Land Acquisition Trust allocated $822,000 to buy 7.9 acres (32,000 m2) of property east of the Creek.

A group of local citizens, who later formed the organization Arch Creek Trust, went to Tallahassee in February 1973, to finalize the agreement. On the night they returned, the natural bridge collapsed and fell into the creek. Rumors of sabotage ran through the community, and the Metro-Dade Police Bomb Squad was called out. Nothing was discovered, and experts generally agreed later that the fall was probably due to constant vibrations from passing trains, or erosion, or just old age and decay. In the years that followed, there were various efforts to restore the bridge, clear the property of trash and save additional land in the area. . . .

(The bridge has been totally restored, by the way.)