Lock and Dam No. 1
Script error: No such module "Type in location".Script error: No such module "Infobox".Template:Template otherScript error: No such module "Check for unknown parameters".Template:Main other Ford Dam, officially known as Lock and Dam No. 1, is on the Upper Mississippi River and is located between Minneapolis and Saint Paul, Minnesota just north of the confluence of the Mississippi with the Minnesota River at Mississippi River mile 847.9, in Minneapolis. The powerhouse portion was previously owned by the Ford Motor Company, which operated a hydroelectric power station to feed electricity to its Twin Cities Assembly Plant on the east side of the river. It was sold to Brookfield Power Co. in April 2008. The dual-lock facility and dam was built and is operated by the St. Paul district of the U.S. Army Corps of Engineers' Mississippi Valley Division.[1][2][3]
Facility
The first facility at the site went into operation in 1917 and superseded the role of the earlier Lock and Dam No. 2 (today known as the Meeker Island Lock and Dam). The facility was rebuilt in 1929, and an expansion from one lock to two locks was completed in 1932. Each lock is Template:Convert wide by Template:Convert long (17 × 122 meters), half the width of the next lock downstream, though this is the only dual-lock facility in the district. The lift is about Template:Convert. Major rehabilitation efforts were carried out between 1978 and 1983, including the replacement of many manual and hydraulic components with computer controls.
The eastern portion of the site consists of an overflow Ambursen dam, which is a buttress dam where the upstream part is a relatively thin flat slab usually made of reinforced concrete. The lift is Template:Convert. There is an inflatable flashboard system on top of the dam that can increase the lift by Template:Convert when so desired. The lock side of the facility has a large observation area that is open from April to November each year. A bridge allows visitors to walk over the two locks and right up next to the dam.
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When the facility opened, it assured a navigable channel up to the tail end of Saint Anthony Falls upriver in Minneapolis. Additional locks were added there in the 1960s, extending the head of navigation to a dam in Coon Rapids (which has no lock), until the closure of the Upper Saint Anthony Falls lock in 2015.
Just upstream of the dam is the Ford Parkway Bridge.
Repair
In November 1958, extensive repairs to the dam began to correct serious leaking from one of the walls, which did not complete until the opening of river traffic in the spring of 1959. To prevent the underwashing of the entire structure, Ashbach Construction filled each wall crack and tunnel by Neoprin and concrete.[4]
Hydroelectric Power Production
The Corps built a base for a hydroelectric plant in the 1917 dam but Federal law required that the plant not be built by the government. Ford built the powerhouse, completed 1924, to power an assembly plant Ford also built on top of the bluff adjacent to the plant.Template:Sfn The assembly plant closed in 2011 and the land is being redeveloped for residential and commercial uses. The powerhouse is Template:Convert long by Template:Convert wide and is built into the east end of the dam. It includes 4 turbines and generators with a total capacity of 17,920 kW using 7,000 cfs of water. It generates about 97,100 megawatt-hours (MWh) a year. Before the closure of the assembly plant, the powerhouse supplied all the electricity to the assembly plant, plus free power to the lock and dam, and 22,000 MWh (22%) was sold to the local power grid.[5] Since the closure of the assembly plant and subsequent purchase of the powerhouse by Brookfield Renewable Power Inc. in 2008 all electricity generated at the facility has been sold on the wholesale market.[6]
Gallery
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The powerhouse as seen from upstream
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Towboat Patrick Gannaway taking a load of sand and gravel through Lock Number 1.
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Lock and dam No. 1 with lock facilities on the left and hydroelectric powerhouse on the right.
See also
- St. Anthony Falls
- Mississippi National River and Recreation Area
- List of locks and dams of the Upper Mississippi River
- Winchell Trail
References
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Further reading
- Script error: No such module "Citation/CS1".
- Script error: No such module "Citation/CS1". Why the Meeker Island dam was abandoned and partly demolished 5 years after it was completed and the Ford dam was more than doubled in height when it was 75% complete.
External links
Template:Mississippi National River and Recreation Area Template:Locks and dams of the Upper Mississippi River
- Pages with script errors
- Pages with broken file links
- Wikipedia articles incorporating content from works by Recreation.gov
- Wikipedia articles incorporating text from public domain works of the United States Government
- Transportation buildings and structures in Minneapolis
- Buildings and structures in Saint Paul, Minnesota
- Dams in Minnesota
- Historic American Engineering Record in Minnesota
- Mississippi Gorge
- Mississippi National River and Recreation Area
- Mississippi River locks
- United States Army Corps of Engineers dams
- Transport infrastructure completed in 1917
- Buttress dams
- Dams on the Mississippi River
- Mississippi Valley Division
- 1917 establishments in Minnesota
- Locks of Minnesota
- Hydroelectric power plants in Minnesota