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Lock locations upstream of Murray Lock and Dam (Lock No. 7), which is located in Little Rock, AR, will require underwater rock demolition prior to the installation of small stay in-place forms, filled with high strength concrete, on the lock floor (Figure 1). The sill modification at lock locations downstream of Murray Lock and Dam (Lock No. 7) will require large stay in-place forms and large support slabs to be placed on the lock floor.

This area of management runs along the McClellan-Kerr Arkansas River Navigation System (MKARNS) from Navigation Mile 0 downstream (Mouth of the White River with the Mississippi River) to Navigation Mile 125 upstream (Murray Lock & Dam #7 at Little Rock). This contract has one base year and four option years.