Corps to start reducing flows out of Lake Okeechobee
On Dec. 3, the U.S. Army Corps of Engineers’ Jacksonville District reported that it would start reducing outflows from Lake Okeechobee to the estuaries on Dec. 5. It will reduce releases gradually to allow time for the ecosystems of the Caloosahatchee and St. Lucie rivers and estuaries to adjust.
Beginning Dec. 5, the USACE will begin the transition to dry season operations on Lake Okeechobee by implementing a seven-day release with a reduced average target flow for the Caloosahatchee Estuary of 3,000 cubic feet per second (cfs) as measured at the Moore Haven Lock & Dam (S-77). At the same time, it implemented a multi-week release pattern for the St. Lucie Estuary, starting with a five-day pause to allow for recovery of estuary health, followed by a seven-day average release of 1,500 cfs as measured at St. Lucie Lock & Dam (S-80) near Stuart.
“We will reduce the releases from Lake Okeechobee over the next month,” Jacksonville District Commander Col. Andrew Kelly said. “The 2020-2021 dry season has begun, and we will manage the lake in tandem with the needs and concerns of the people and ecosystems of South Florida.”
The USACE will provide regular updates to the public and stakeholders about conditions in Lake Okeechobee and the system.
“We will continue to look at the system holistically and expect to be able to refine the dry season strategy for the South Florida system around February,” Kelly said. “By then, we should have a much better feeling for the effects, if any, of the La Niña, and the results of our gradual transition plan. We’ll be in a better position to evaluate the trends and conditions in the lake, the Everglades and the estuaries, including water supply and our ability to move water south.”
Additional runoff from rain in the Caloosahatchee and St. Lucie basins could occasionally result in flows that exceed one or both targets. USACE lock operators will make real-time adjustments to spillways along the Caloosahatchee and the St. Lucie Canal to maintain canal levels.
As of Dec. 3, Lake Okeechobee was 16.02 feet above sea level. During the previous week, lake levels receded 0.18 feet, with a 0.19-foot drop in the past 30 days.