Lock and Dam No. 4

Lock and Dam No. 4

Infobox_Dam
dam_name=



caption=Mississippi River Lock and Dam number 4.
official_name=
crosses= Upper Mississippi River
reservoir=Pool 4
locale=Alma, Wisconsin
maint= United States Army Corps of Engineers
length= convert|1367|ft|m|1 (movable portion)
height=
width=
began=1932
open=May 1935
closed=
reservoir_capacity=
reservoir_catchment=
reservoir_surface=
coordinates= coord|44|19|32|N|91|55|13|W|region:US_type:landmark
extra=

Lock and Dam No. 4 is a lock and dam located near Alma, Wisconsin and Kellogg, Minnesota on the Upper Mississippi River around river mile 752.8. It was constructed and placed in operation in May, 1935. Its last major rehabilitation was from 1988 to 1994. The dam consists of a concrete structure convert|1367|ft|m|1 long with six roller gates, 22 tainter gates and an earth embankment convert|5400|ft|m|1 long. The lock is convert|110|ft|m|1 wide by convert|600|ft|m|1 long. There were ten major injuries and three deaths recorded during construction of the facility.

External links

* [http://www.mvp.usace.army.mil/navigation/default.asp?pageid=145&subpageid=163 USACE Lock and Dam 4]
* [http://hdl.loc.gov/loc.pnp/hhh.wi0213 Survey number HAER WI-47 - Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffalo County, WI]


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