Projects & Studies
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Critical Infrastructure Security Program (CISP)
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Dam Bridge and Gate Painting: Upper St. Anthony Falls through Lock and Dam 10
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East Two Rivers at Tower, Minnesota
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Effects of Recreational Boating on the Upper Mississippi River System
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General Investigations: Federal Energy Regulatory Commission(FERC) Licensing
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General Investigations: Hydropower, Crown Hydro, Minneapolis, Minnesota
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General Investigations: Hydropower, Ford Plant, Minneapolis, Minnesota
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Hydropower, LSAF Hydro, Minneapolis, Minnesota
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Hydropower, Lock and Dam 2, Hastings, Minnesota
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Hydropower, Upper St. Anthony Falls, Minneapolis, Minnesota
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Integrated Watershed Study: Minnesota River Basin in Minnesota, South Dakota, North Dakota and Iowa
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Lock & Dam 10 Stage 2
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Lock Tow Haulage Units
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Lock and Dam 4 Embankment Environmental Assessment
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Locks and Dams 2 - 10, Embankment Maintenance Study
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Lower Pool 4 Channel and Dredged Material Management Study
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McMillan Island, Mississippi River Channel Maintenance
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Minnesota River Navigation Project
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Mississippi Headwaters Reservoirs Dam Safety Issues
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Mississippi Headwaters Reservoirs Project Sites
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Mississippi River Locks and Dams Nos. 2-10 Embankment Rehabilitation
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Mississippi River Major Maintenance / Rehabilitation
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Mississippi River: Lock & Dam 3 Navigation Safety and Embankments, Minnesota and Wisconsin
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Navigation and Environmental Sustainability Program (NESP)
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Navigation, Mississippi River, Lock Bulkheads and Slot Installation, Minn/Wisc/Iowa
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Operation and Maintenance, Lock and Dam 10 Stage 2
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Reconnaissance Study: Minnesota River Basin in MN, SD, IA and ND
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Recreational Boating Study of the Mississippi River, Pools 4 to 9, Summer 2003
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River Resource Values and Expectation
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Small-Boat Harbor Dredging, St. Paul, Minnesota (Harbor Dredging)
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St. Croix River: Endangered Mussel Conservation - Zebra Mussel Control
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Upper Mississippi River - Illinois Waterway System Navigation Study
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Upper Mississippi River 9-Foot Project - Locks & Dams
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Upper Mississippi River 9-Foot Project Channel Maintenance; MN, WI, IA
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Warroad Harbor and River Harbor Dredging
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Navigation, Mississippi River, Lock Bulkheads and Slot Installation, Minn/Wisc/Iowa
Location/Description
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Locks 2 through 10 are located on the Mississippi River between Hastings, Minnesota, and Guttenberg, Iowa. The purpose of the lock stoplog and slot installation project is to provide a means for dewatering the lock chambers. Some operation and maintenance efforts require a dry lock chamber to make repairs. Emergency repairs may also require a lock dewatering. Installation of slots in the lock walls and procurement of stoplogs are required to dewater the lock chambers.
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Status
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The Corps of Engineers has contracted for the fabrication of the required number of stop logs. Fabrication will occur over multiple years including fiscal years 2005 through 2008. These stop logs will be used for scheduled maintenance or to respond to an emergency closure. Six stop logs and one lifting beam were delivered in October 2006. An option for nine additional stop logs was exercised December 2006; their delivery is scheduled for October 2008. St. Paul District will have the ability to dewater lock chambers 2 through 10 after slots and sill beams are installed.
Since 2004, slots have been constructed at Locks 2, 3, 4, 5, 5A, 8, and 9. Design and construction of the remaining three locks will be accomplished over the next 4 years in accordance with this schedule:
Lock 10, awarded in August 2008, to be constructed in winter 2009.
Lock 7, design and award in fiscal year 2009, construct in 2010.
Lock 6, design and award in 2009-2010 subject to funding, construct in 2011.
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Additional
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The existing dam system for dewatering the locks on the Mississippi River can no longer be used because of deteriorated metal and welds and safety concerns. Because these locks cannot be dewatered with the existing system, the only way to dewater for an emergency repair would be to construct temporary earth dams above and below the lock. This type of emergency dewatering would shut down navigation on the river for an indefinite period and have significant negative impacts on the national economy.
The current system, which uses steel trusses, cannot be rehabilitated and must be abandoned. New stoplogs and slots to anchor the stoplogs must be constructed before the locks can be dewatered again.
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Authority
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The Upper Mississippi River Nine-Foot Channel Navigation Project was authorized as part of the Rivers and Harbors Act approved July 3, 1930.
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Fiscal
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Total project cost $30,700,000
Completed to date $23,600,000
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[Printable Copy]
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