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Weeks Marine’s cutterhead dredge J.S. CHATRY has completed the augmentation of the underwater sill in the Mississippi River.
According to Army Corps New Orleans District, the sill which is now -30 feet below water, has been operationally complete.
The sill, first completed in July 2023, was constructed to an elevation of -55 feet to slow progression of salt water upstream.
The J.S. CHATRY began sill augmentation September 24, 2023, building up the current sill from its initial depth of -55 feet to -30 feet, while leaving a 620-foot-wide navigation channel open for passage of deep-water vessels.