Alternate Title

A Biological Investigation of the Caloosahatchee Estuary of Florida

Document Type



A biological sampling program in the lower Caloosahatchee River and Estuary by District and consultant biologists was authorized by the Office, Chief of Engineers on 7 May 1957. This survey of the effects of Lake Okeechobee discharge and local runoff through the Caloosahatchee River on the fishes and animals of this Gulf estuary was a continuation of a previously authorized study of Lake releases to the Atlantic Coast (Gunter, 1959).

Scope and purpose of this work was to: (a) Review the history of the Caloosahatchee River and analyze the problems concerned with discharges into the Estuary; (b) present biological data from investigations of the Estuary made at different times during the years 1957 to 1960, inclusive; (c) determine the biological effects of operation of Moore Haven and Ortona Locks, and the planned lock and dam at Olga with reference to important indicator species within the lower river and estuary; and (d) determine operational procedures, practicable within specific operational requirements of the project, which would be either beneficial or of least damage to estuarine fishes and fishing.

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