Saint Anthony Falls

Saint Anthony Falls

Infobox_nrhp | name =St. Anthony Falls Historic District
nrhp_type =hd

caption =Aerial view of Saint Anthony Falls with the upper dam; there is also a lower dam.
location= Minneapolis, MN
area =
built =Apron built 1848
architect= Apron by Ard Godfrey, et al.
added = March 11, 1971
refnum=71000438 cite web|url=|title=National Register Information System|date=2006-03-15|work=National Register of Historic Places|publisher=National Park Service]

Saint Anthony Falls, or the Falls of Saint Anthony, located northeast of downtown Minneapolis, Minnesota, was the only natural major waterfall on the Upper Mississippi River. The natural falls was replaced by a concrete overflow spillway (also called an "apron") after it partially collapsed in 1869. Later, in the 1950s and 1960s, a series of locks and dams were constructed to extend navigation to points upstream. [ U.S. Army Corps of Engineers St. Paul District: Upper St. Anthony Falls] ]

Named after the Catholic saint Anthony of Padua, the falls is the birthplace of the former city of St. Anthony and to Minneapolis when the two cities joined in 1872 to fully utilize its economic power for milling operations. From 1880 to about 1930, Minneapolis was the "Flour Milling Capital of the World." [cite web|url=|publisher=Mill City Museum|title=Mill City Museum History of St Anthony|date=2005]

Today, the falls is defined by the Lower Saint Anthony Falls which refers to a downstream lock of what is now officially referred to as Upper Saint Anthony Falls. [ [ U.S. Army Corps of Engineers St. Paul District: Lower St. Anthony Falls] ] These locks were built as part of the Upper Mississippi River 9-Foot Navigation Project. The area around the falls is designated the St. Anthony Falls Historic District. [cite web|url=|title=St. Anthony Falls Historic District|date=2006|publisher=City of Minnneapolis]


Before European exploration, the falls held cultural and political significance for native tribes who frequented the area. The falls was an important and sacred site to the Mdewakanton Dakota and they called the Mississippi River, "hahawakpa", "river of the falls." The falls ("haha") themselves were given specific names, "mnirara" "curling waters," "owahmenah" "falling waters," or "owamni," "whirlpool" ("mniyomni" in the Eastern Dakota dialect and "owamniyomni" in the Teton Dakota (Lakota) dialect.cite web|url=| title=Recipe for a Mill City, A Curriculum Kit for Minneapolis Third Grade Students|publisher=Minnesota Historical Society|date=2002] Dakota associated the falls with legends and spirits, including Oanktehi, god of waters and evil, who lived beneath the falling water.cite web |url= |title= Engineering the Falls: The Corps Role at St. Anthony Falls |Publisher= U.S. Corp. of Engineers |accessdate=2007-05-18] The sacred falls also enters into their oral tradition by a story of a warrior's first wife who killed herself in anguish of forlorn love for the husband had assumed a second wife.cite web|url=|title=FALLS OF ST. ANTHONY: Myths and Legends of our Own Land|author= Charles M. Skinner|date= 1896|] The rocky islet where the woman had pointed her canoe towards doom thus was named Spirit Island which was once a nesting ground for eagles that fed on fish below the falls. Dakota also camped on Nicollet Island upstream of the falls and to tap the sugar maple trees.cite web|url=|title=Twelve Thousand Years Ago|publisher=St. Anthony Falls Heritage Board|date=2007]

Since the cataract had to be portaged, the area became one of the natural resting and trade points along the Mississippi between Dakota and Anishinaabe peoples. The Anishinaabe (Ojibwe) term was recorded as "kakabikah" ("gakaabikaa", "split rock" or more descriptively, "gitchi gakaabikaa," "the great severed rock" which referenced the jagged chunks of limestone constantly eroding by the falls). [cite web|url=|title=Preserve Camp Coldwater Coalition|date=2000|author=Susu Jeffrey]

In 1680, the falls became known to the Western world when they were observed and published in a journal by Father Louis Hennepin, a Catholic friar of Belgian birth, who also first published about Niagara Falls to the world's attention.cite web |url= |title= A History of Minneapolis|Publisher= Minneapolis Public Library |accessdate=2007-05-18] Hennepin named them the "Chutes de Saint-Antoine" or the Falls of Saint Anthony after his patron saint, Anthony of Padua. [cite web|url=|title=L'exploration de l'Amérique du Nord|author=Serge Jodra|date=2004] Later explorers to document the falls include Jonathan Carver and Zebulon Montgomery Pike.

Following the establishment of Fort Snelling in 1820, the falls became an attraction for tourists, writers and artists who sought inspiration even if Hennepin's descriptions were not as majestic as hoped for. By the 1860s, however, industrial waste had filled the area and marred the falls' majesty. Further competition over the power of the falls on both banks of the river led to its eventual downfall when it partially collapsed in 1869 and was reinforced and subsequently sealed by a concrete overflow spillway (or "apron").

The area around the falls was added to the National Register of Historic Places as the Saint Anthony Falls Historic District in 1971 which includes 8th Avenue Northeast extending downstream to 6th Avenue Southeast and approximately two city blocks on both shoreline. [ [ Minneapolis' official promotional site for the riverfront district] ] [ [ Engineering the Falls: The Corps Role at St. Anthony Falls] - an article on the U.S. Army Corps of Engineers website covering the history and geology of St. Anthony Falls.] The district's archaeological record is one of the most-endangered historic sites in Minnesota. [cite web|title=10 Most Endangered Places|url=|format=PDF|publisher=Preservation Alliance of Minnesota|date=2008|accessdate=2008-05-01] The National Register of Historic Places is facilitated by the National Park Service. The national significance of the Saint Anthony Falls Historic District is a major reason why the National Park Service's Mississippi National River and Recreation Area was established along the Mississippi River in the Minneapolis/St. Paul metropolitan area.

A Heritage Trail plaque nearby says,

"For untold generations of Indian people the Mississippi River was an important canoe route. To pass around the falls, the Dakota (Sioux) and Ojibway (Chippewa) used a well-established portage trail. Starting at a landing below the site now occupied by the steam plant, the trail climbed the bluff to this spot. From here it followed the east bank along what is now Main Street to a point well above the falls."


Geologists say that the falls first appeared roughly 10,000 years ago several miles downstream at the confluence of the glacial River Warren (at present-day Ft. Snelling). Estimates are that the falls were about convert|180|ft|m high when the River Warren Falls receded past the confluence of the Mississippi River and the glacial River Warren. Over the succeeding 10,000 years, the falls moved upstream to its present location, breaking off the limestone cap in chunks as it receded. Tributaries such as Minnehaha Creek begot their own waterfalls as the Mississippi River valley was cut into the landscape.

From its origins near Fort Snelling, St. Anthony Falls relocated upstream at a rate of about convert|4|ft|m per year until it reached its present location in the early 1800s. When Father Louis Hennepin documented the falls he estimated the falls' height to be 50 or convert|60|ft|m. Later explorers described it as being in the range of 16 to convert|20|ft|m high. The discrepancy may have been due to scope, as the current total drop in river level over the series of dams is 76 ft (23 m).

The geological formation of the area consisted of a hard, thin layer of Platteville Formation, a carbonate rock, overlaying the soft St. Peter Sandstone sub-surface. [cite web|url=|title=A History of Saint Anthony Falls|date=2008-04-18] These layers were the result of an Ordovician Period sea which covered east-central Minnesota 500 million years ago.cite web| last = Anfinson| first = Scott| title = ARCHAEOLOGY OF THE CENTRAL MINNEAPOLIS RIVERFRONT| publisher = The Institute for Minnesota Archaeology| date = 1989| url =| accessdate = 2007-05-08] The water churning at the bottom of the falls ate away at the sandstone, and after enough support had been removed, large blocks of the Platteville Formation would fall off. This process had been happening naturally since 8000 BC, with the falls having receded up from the Fort Snelling area to their location in the 1850s.


The first private land claim at the falls was made by Franklin Steele in 1838 — though he didn't obtain financing for development until 1847, in the form of $12,000 for a 9/10 stake in the property. On May 18, 1848 president Polk approved the claims made in St. Anthony, and Steele was able to build his dam on the east side of the river above the Falls, blocking the east channel.

The dam extended diagonally into the river convert|700|ft|m, was convert|16|ft|m high, and was secured to the limestone riverbed. Its thickness tapered from 40 wide at its base to convert|12|ft|m wide at the top. Steele dispatched logging crews to the Crow Wing River in December 1847 to supply pine for the his sawmill, and by September 1, 1848 sawing commenced using two up-down saws. He was able to sell the lumber readily, supplying construction projects in the booming town.cite web| title =St. Anthony Falls:Timber, Flour, and Electricity| publisher =National Park Service| url =| accessdate = 2007-05-29] The new community at the Falls attracted entrepreneurs from New England, many of whom had experience in lumber and milling. He had hired Ard Godfrey to help build and run the first commercial sawmill at the Falls. Godfrey knew the most efficient ways to use natural resources, like the falls, and the great pine forests, to make lumber products.cite web| title =1838: Franklin Steele claims land at the Falls| work =Timeline| publisher =Minnesota Historical Society|url =|accessdate = 2007-05-29] Godfrey built the first home in St. Anthony, Steele had the town platted in 1849, and it incorporated in 1855.cite web| title = History of the Minneapolis Riverfront District and vicinity| work = Bridges| publisher =Minneapolis Riverfront District| url =| accessdate = 2007-05-29] [cite web| title =Old St. Anthony| work =Mississippi River Design Initiative| publisher =University of Minnesota| url =| accessdate = 2007-05-29]

By 1854, 300 squatters occupied the west bank of the river, and in 1855 Congress recognized the squatters' right to purchase the land they had claimed. The west side quickly developed scores of new mills and consortia. They built a dam diagonally into the river to the north, which, along with Steele's dam created the inverted V-shape, still apparent today. Steele created the St. Anthony Falls Water Power Company in 1856 with three New York financiers. The company struggled for several years, due to poor relations with the financiers, a depression, and the Civil War. In 1868 the firm reorganized with new officers including John Pillsbury, Richard and Samuel Chute, Sumner Farnham, and Frederick Butterfield.

As Minneapolis (and its former neighbor across the river, St. Anthony) developed, the water power at the falls became a source of power for several industries. Water power was used by sawmills, textile mills, and flour mills. Millers on the Minneapolis side formed a consortium to extract power by diverting upper-level water into waterwheel-equipped vertical shafts (driven through the limestone bedrock into the soft, underlying sandstone) and then through horizontal tunnels to the falls' lower level. These shafts and tunnels weakened the limestone and its sandstone foundation, accelerating the falls' upriver erosion to convert|26|ft|m per year between 1857 and 1868. The falls quickly approached the edge of their limestone cap; once the limestone had completely eroded away, the falls would degenerate into sandstone rapids unsuitable for waterpower. The mills on the St. Anthony (east) side of the river were less-well organized harnessing the power, and therefore industry developed at a slower pace on that side.

The 1869 collapse of the Hennepin Island tunnel

The early dams built to harness the waterpower exposed the limestone to freezing and thawing forces, narrowed the channel, and increased the damage from floods. A report in 1868 found that only eleven hundred feet of the limestone remained upstream, and if it were eroded away, the falls would turn into a rapids that would no longer be useful for waterpower.cite book|last=Kane|first=Lucile M.|title=The Falls of St. Anthony: The Waterfall That Built Minneapolis|publisher=Minnesota Historical Society|location=St. Paul, Minnesota|date=1966, revised 1987] Meanwhile, the St. Anthony Falls Water Power Company approved a plan for the firm of William W. Eastman and John L. Merriam to build a tunnel under Hennepin and Nicollet Islands that would share the waterpower. This plan was met with disaster on October 5, 1869, when the limestone cap was breached.

The leak turned into a torrent of water coming out the tunnel. The water blasted Hennepin Island, causing a convert|150|ft|m|sing=on chunk to fall off into the river. Believing that the mills and all the other industries around the falls would be ruined, hundreds of people rushed to view the impending disaster. Groups of volunteers started shoring up the gap by throwing trees and timber into the river, but that was ineffective. They then built a huge raft of timbers from the milling operations on Nicollet Island. This worked briefly, but also proved ineffective. A number of workers worked for months to build a dam that would funnel water away from the tunnel. The next year, an engineer from Lowell, Massachusetts recommended completing a wooden apron, sealing the tunnel, and building low dams above the falls to avoid exposing the limestone to the weather. This work was assisted by the federal government, and was eventually completed in 1884. The federal government spent $615,000 on this effort, while the two cities spent $334,500.cite book|title=Mill City: A Visual History of the Minneapolis Mill District|last=Pennefeather|first=Shannon M.|date=2003|publisher=Minnesota Historical Society|location=St. Paul, Minnesota]

Locks and dams

St. Anthony Falls was the upper limit of commercial navigation on the Mississippi until two dams and a series of locks were built between 1948 and 1963 by the United States Army Corps of Engineers. The locks make commercial navigation possible above Minneapolis but, since the locks in Minneapolis are smaller than most of the locks on the river, the practical limit for many commercial tows is further downriver. Few barges go past St. Paul.

Completed in 1963, the upper St. Anthony Falls dam is a horseshoe-shaped hydro-electric dam 93 feet (28 m) in height. The upper pool has a normal capacity of 3,150 acre feet (3,885,000 m³) and a normal level of 799 feet (244 m) above sea level. The navigation channel required alteration of the historic Stone Arch Bridge, which now has a metal truss section to allow ships to pass below.

Completed in 1956, the lower St. Anthony Falls dam is a gravity-type hydro-electric dam 60 feet (18 m) in height, consisting of a 275 foot (84 m) long concrete spillway with 4 tainter gates. The lower pool (sometimes called the intermediate pool) has a normal capacity of 375 acre-feet (463,000 m³) and a normal level of 750 feet (229 m) above sea level.

The pool below the lower dam has a normal level of 725 feet (221 m) above sea level.

The upper and lower locks are each 56 feet (17 m) wide by 400 feet (122 m) long.

The current around the spillway/falls is often swift and dangerous. In 1991, a small boat drifted too close and fell over one part of the dam. Two people onboard were killed, and two others had to be rescued by helicopter. Rescues at the site are usually much less dramatic, but continue to happen occasionally.

ee also

* List of contributing properties in the St. Anthony Falls Historic District
* Saint Anthony Main shopping area
* Mississippi National River and Recreation Area
* I-35W Mississippi River bridge, which collapsed in 2007 and temporarily blocked the lower pool.


External links

* [ "Wheat Farms, Flour Mills, and Railroads: A Web of Interdependence," a National Park Service Teaching with Historic Places (TwHP) lesson plan]
* [ St. Anthony Falls page within the NPS Mississippi National River and Recreation Area website]

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