Description of Work included in Optimum Plan
A Major Rehabilitation Evaluation Report for the Dams recommending a $78 million project was approved in 2002. The total project cost was updated to $163.8M and approved in 2007. The dam gates, gate hoisting machinery, electrical power and distribution system, emergency bulkheads and a permanent scour protection system will be replaced with construction general funding beginning in 2005 and completed in 2014.
Temporary emergency repairs to the emergency bulkheads and scour protection were initiated in 2004 with operation and maintenance funding and were completed in 2005. Construction General funds were received, $5 thousand in 2004 and $3.5 million in 2005, under the Dam Safety and Seepage/Stability Correction Program.
In 2005 the design for the emergency bulkheads and Back Channel lift gate and machinery replacement were completed. This enabled a $2.4 million contract to be awarded in August 2005 for the supply of new emergency bulkheads and an $18.6 million continuing contract to be awarded in September 2005 for the replacement of the six Back Channel Dam lift gates and operating machinery.
In 2006 $14.935 million was received from the Construction General appropriation. $8.8 million was used to continue the Back Channel Dam Gate replacement, $1.6 million to fully fund the Emergency Bulkhead Supply Contract, $1.2 million to award and fully fund a Lift Gate Supply contract, $732 thousand to award and fully fund Emergency Bulkhead Hoist Supply Contract and $2.6 million to advance the engineering and design of the Main Channel Apron and Erosion Protection to enable construction award in 2008.
In FY 2007 the work allowance amount of $17M was used to continue the Back Channel Dam lift gates and operating machinery contract, fully fund contracts for the fabrication of Main Channel lift gates, and engineering for future contracts.
In FY 2008 $42.3M was used to initiate and complete the $2.36M main channel abutment stabilization contract and award the main channel dam gate, machinery and scour protection replacements base contract for $34.44M and engineering for future contracts.
In the FY 2009 appropriations act and in the FY 2009 President's budget, this project was identified to equally share the total construction cost with the Inland Waterways Trust Fund.
In 2009 $25.8M CG and $3.33M ARRA was used to award the main channel dam scour protection options, award the back channel dam service bridge rehabilitation contract, award the back channel dam abutment stabilization contract, and engineering for future contracts.
The optimum plan in 2010 through 2014 includes the use of fully funded construction contracts to complete the remaining scope of the Rehabilitation Project for the Dams. There are additional repairs to the dam that would be operations and maintenance funded and is interrelated to repairs being completed with construction general funding and necessary for continued safe operation of the dam. These repairs are documented in the Major Rehabilitation Evaluation Report and the latest Periodic Inspection Report and include repairs to the piers, abutment, bulkhead storage pit, and service bridge deck. The concrete repairs would be designed and constructed concurrently with the construction general funded contracts. Additionally the maintenance cranes need replaced, gate brake units need replaced, and the bulkhead hoist needs reconditioned. Additional temporary repairs to the scour protection could also be necessary given the past history of stone protection displacement and recent high flow conditions. Completing the needed operation and maintenance funded repairs concurrently with the construction general funded contracts would achieve economy of scales savings and cost less instead of completing them under separate contracts. The cost to complete this additional work on the dams is estimated to be $5 million.
Navigation improvement opportunities are being evaluated under the Upper Ohio River, Emsworth, Dashields, and Montgomery Navigation Improvement Study. When permanent improvements at Emsworth Locks will be initiated is uncertain. Miscellaneous repairs are needed now to keep the lock operating safely and reliably. Included are replacement of the hydraulic system cylinders and hydraulic piping repairs, tow haulage system replacement, upper guard wall fender system replacement and downstream mooring cell replacement. The cost to complete the work on the locks is estimated to be $5 million.
O&M projected 5 year (FY 2010 through FY 2014) average cost to operate and maintain Emsworth Locks and Dams at an acceptable level of risk is $4.0M per year. Maintenance items include maintenance, repair, and/or replacement of lock operating equipment; lock gates, anchorages, and sills; lock valves; lock walls; dam operating machinery; dam bulkhead and hoist; and hydraulic systems. These costs are above and beyond the routine day to day maintenance of all system components. This cost does not include any costs associated with the rehabilitation of the dams.