The Corps’ Mississippi Valley New Orleans (MVN) did not open or close any bays on the Bonnet Carré Spillway (Mile 128.8 to 127.3 Above Head of Passes [AHP]) today (Thursday, June 27, 2019).  The maximum flow above the Bonnet CarréSpillway today was 1.148 million cubic feet per second (cfs) based on the flow measured at Red River Landing (Mile 302.4 AHP), with the calculations and timing adjusted for the downriver flow at Bonnet Carré.  The most recent crest (maximum flow) above the Bonnet Carré occurred between June 16 to June 17 (2019).

The Corps has announced plans to begin closing bays when the Carrollton Gauge reaches 15.5 feet, based on present forecasts this would happen the third week of July (July 21, 2019).  The Carrollton Gauge (New Orleans) reading was 16.00 feet at 1500 hours today with a 24-hour change of – 0.07 feet.  The National Weather Service’s Extended Streamflow Prediction forecast remains steady with a very slow fall indicating a reading of 14.5 feet on July 25, 2019.

BONNET CARRÉ SPILLWAY SECOND OPERATION 2019

The MVN manages the opening and closing of bays on the Bonnet Carré Spillway as a flood control structure to ensure the maximum flow at New Orleans remains at/or below the trigger point flow of 1.25 million cfs in accordance with the approved Bonnet Carré  Spillway Water Control Manual.  The stages below the Spillway will be artificially controlled by the flow diverted from the Mississippi River.

 The operation of the Morganza Floodway (Spillway) at Mile 280 AHP is no longer being considered at this time.

 The MVN operated the Bonnet Carré Spillway from February 27 to April 11, 2019, prior to 2019 the Spillway had never been operated in back-to-back years (2018 and 2019).  The required opening of the flood control structure twice in the same year represents another historic first and the Great Flood of 2019 continues to be record setting.