Lake Profiles and Tailwater Data


Lake temperature and dissolved oxygen profiles are recorded and updated every two weeks during lake stratification (where the heat from the sun causes the water to split into three layers: a warm layer on top, a mixture layer in middle, and a cold layer on bottom), which typically lasts from late spring/early summer to late fall/early winter. The readings are recorded near the dam site on the lake by the lake project staff.  

For tailwater temperatures outside of lake stratification (approx. early winter to late spring), go to Observations of All Lakes

Note to anglers: be advised that fish typically avoid dissolved oxygen levels that are less than 5 mg/L.

Soon, this page will be migrated to the Water Quality Data and Reports page.

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Water Quality Gages

In partnership with USGS, the Louisville District Water Quality Team supports several water quality gages.  The data collected by these gages is used by the Team in intensive surveys, special studies, and to evaluate the efficacy of data collection protocols.


Nolin River Lake

Nolin River Lake tailwater


Cecil M. Harden Lake

Cecil M. Harden tailwater


Brookville Lake

Brookville tailwater


NOTICE: All data contained herein is preliminary in nature and therefore subject to change. The data is for general information purposes ONLY and SHALL NOT be used in technical applications such as, but not limited to, studies or designs. All critical data should be obtained from and verified by the United States Army Corps of Engineers, Louisville District, Water Quality Team, 600 Dr. Martin Luther King Jr. Place, Louisville, KY 40202. The United States of America assumes no liability for the completeness or accuracy of the data contained herein and any use of such data inconsistent with this disclaimer shall be solely at the risk of the user.