Red Rock Dam (Iowa)

Infobox_Dam
dam_name= Red Rock Dam


caption= (Army Corps of Engineers)
official_name= Red Rock Dam
crosses= Des Moines River
reservoir= Lake Red Rock
locale= Marion County, Iowa
maint= US Army Corps of Engineers, Rock Island District
length= convert|5676|ft|m|0|abbr=on
height= convert|110|ft|m|0|abbr=on
width= convert|13.4|ft|m|0|abbr=on (concrete base)
began= 1960
open= 1969
closed=
cost= $88,000,000
reservoir_capacity= 114,400 cubic feet (= max outflow)
reservoir_catchment=
reservoir_surface= 15,250 acres
bridge_carries=
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bridge_clearance=
bridge_traffic=
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coordinates= Coord|41|24|19|N|93|02|49|W|type:city|display=inline,title
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Red Rock Dam is a dam in central Iowa on the Des Moines River, forming Lake Red Rock. It is contained entirely within Marion County. The nearest cities are Pella to the northeast, and Knoxville to the southwest.

"The dam consists of a rolled earthfill embankment and a gravity concrete control section. The dam, at crest elevation of 797 feet above mean sea level, is about 5,200 feet long and 95 feet high above the flood plain. A compacted impervious cutoff trench to bedrock and a grout curtain in the rock are provided for underseepage control." [http://stinet.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA271741 source] .

It was constructed along with Saylorville Dam as a flood control project by the US Army Corps of Engineers, Rock Island District. Major flooding occurred in 1851, 1859, 1903, 1944, 1947, and 1954 [http://www.mvr.usace.army.mil/redrock/flooddamage.htm source] . In 1960, the Corps began construction. The project was completed in 1969 at a cost of $88 million. The Army Corps maintains its local offices in Knoxville

Extensive recreational development along the lakeshore rapidly followed.

ources

* [http://www.mvr.usace.army.mil/redrock/flooddamage.htm USARCE history of dam (primary source for this article)]
* [http://stinet.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA271741 Physical description of dam]