Effigy Mounds National Monument

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Effigy Mounds National Monument
IUCN category V (protected landscape/seascape)
Big Bear Mound at Effigy Mounds National Monument
Map showing the location of Effigy Mounds National Monument
Map showing the location of Effigy Mounds National Monument
Location Allamakee / Clayton Counties, Iowa, USA
Nearest city Marquette, Iowa and Dubuque, Iowa
Coordinates 43°5′19″N 91°11′8″W / 43.08861°N 91.18556°W / 43.08861; -91.18556Coordinates: 43°5′19″N 91°11′8″W / 43.08861°N 91.18556°W / 43.08861; -91.18556
Area 2,526 acres (1,022 ha)[1]
Created October 25, 1949 (1949-October-25)
Visitors 82,581 (in 2011)[2]
Governing body National Park Service
Website Effigy Mounds National Monument
An entrance to Effigy Mounds National Monument

Effigy Mounds National Monument preserves more than 200 prehistoric mounds built by Native Americans. Numerous effigy mounds are shaped like animals, including bears and birds. These were built mostly in the first millennium, by peoples of the Woodland Culture.

The monument takes in area located mostly in Allamakee County and also in Clayton County, Iowa in the midwestern United States.[3] The park's visitor center is located in Harpers Ferry, Iowa, just north of Marquette.


Lidar-derived image of Marching Bears Mound Group, Effigy Mounds National Monument.

Prehistoric earthworks by mound builder cultures are common in the Midwest. However, mounds in the shape of mammals, birds, or reptiles, known as effigies, apparently were constructed primarily by peoples in what is now known as southern Wisconsin, northeast Iowa, and small parts of Minnesota and Illinois. Exceptions are the Great Serpent Mound in south-eastern Ohio, and Mound A at Poverty Point, Louisiana, built in the shape of a large soaring bird.

Effigy Mounds National Monument takes in the western edge of the effigy region. The North Unit (67 mounds) and South Unit (29 mounds) are located where the counties meet along the Mississippi River. They are contiguous and easily accessible. The Sny Magill Unit (112 mounds) is approximately 11 miles (18 km) south of the other units, and offers no visitor facilities. Other mounds are located on remote parts of the Monument property.[4] The monument contains 2,526 acres (10.22 km2) with 206 mounds, of which 31 are effigies. The largest, Great Bear Mound, measures 42 meters from head to tail and rises over a meter above the original ground level.

In northeastern Iowa the Effigy Mounds area was a point of transition between the eastern hardwood forests and the central prairies. Native American and early settlers would have been able to draw on natural resources available in forests, wetlands, and prairies. These areas were occupied by humans for many centuries.

Effigy Mounds is adjacent to the Upper Mississippi River National Wildlife and Fish Refuge, the Driftless Area National Wildlife Refuge, the Yellow River State Forest, and a short distance to the south, Pikes Peak State Park. There are also a number of state-owned wildlife management areas, such as the one at Sny Magill Creek, where Clayton County also maintains a county park.

Numerous federally recognized tribes have been identified as having linguistic and cultural ties to the various ancestral peoples who built the effigy and other earthwork mounds at the monument site.

Tribes associated with the Mounds[edit]

  • Iowa Tribe of Kansas and Nebraska
  • Iowa Tribe of Oklahoma
  • Otoe-Missouria Tribe of Oklahoma
  • Ho-Chunk Nation of Wisconsin
  • Winnebago Tribe of Nebraska
  • Upper Sioux Community of Minnesota
  • Shakopee Mdewakanton Sioux Community In the State of Minnesota
  • Lower Sioux Indian Community of Mdewakanton Sioux Indians of Minnesota
  • Prairie Island Indian Community In the State of Minnesota
  • Sac and Fox Tribe of the Mississippi in Iowa
  • Sac and Fox Nation of Missouri in Kansas and Nebraska
  • Sac and Fox Nation of Oklahoma
  • Crow Creek Sioux of South Dakota
  • Omaha Tribe of Nebraska
  • Santee Sioux of Nebraska
  • Standing Rock Sioux of North Dakota
  • Yankton Sioux of South Dakota
  • Sisseton Wahpeton Oyate
  • Flandreau Santee Sioux Tribe[5]
Woodland conical mounds at Effigy Mounds National Monument, Sny Magill Unit, Clayton County, Iowa

Public Access[edit]

View of the Mississippi River and western Wisconsin from Effigy Mounds National Monument in 2007

The visitor center, located at the park entrance, contains museum exhibits highlighting archaeological and natural specimens, an auditorium, and book sales outlet. The park has 14 miles of hiking trails. No paved public automobile access roads exist in the park. Rangers give guided hikes and prehistoric tool demonstrations that are scheduled and advertised, mid-June through Labor Day weekend. Educational programs are presented on- and off-site by appointment.

Natural features in the monument include forests, tallgrass prairies, wetlands and rivers. There are no lodging or camping facilities in the park. Excellent camping is available at nearby Pikes Peak State Park and Yellow River State Forest in Iowa; there is also Wyalusing State Park in Wisconsin. Various primitive campgrounds exist in the area as well. The national monument is quite close to the town of Marquette, Iowa, and is just across the Mississippi River from the city of Prairie du Chien, Wisconsin, where ample motel and gambling-boat facilities exist.

Effigy Mounds was proclaimed a National Monument on October 25, 1949. Charles R. Keyes, head of the Iowa Archaeological Survey, and Ellison Orr, chief field supervisor for the Iowa Archaeological Survey, worked to survey and map the area, and to establish its significance for preservation.[6]

Map of Effigy Mounds National Monument and the surrounding area

Driftless Area[edit]

The Effigy Mounds National Monument is noted for being in the Driftless Area, an area of North America which escaped glaciation during the last ice age. The adjacent Driftless Area National Wildlife Refuge takes its name from this region.

The Park Service writes that:

"Patchy remnants of Pre-Illinoian glacial drift more than 500,000 years old recently have been discovered in the area. Unlike the rest of Iowa, the Paleozoic Plateau was bypassed by the last of the Pleistocene glaciers (the Wisconsin), allowing the region's fast cutting streams to expose and carve out deep channels in the bedrock-dominated terrain. The area is characterized by thin loess soil cover, isolated patches of glacial drift, deeply entrenched river valleys, and karst (sinkholes, caves, and springs) topography."[7]


In July 2016, Thomas Munson, Superintendent for 20 years of the Effigy Mounds National Monument, was sentenced after pleading guilty to stealing bones in 1990 of 40 ancient Native Americans, who lived between 700 and 2,500 years ago, from the holdings of the museum at the site.[8] The remains had been excavated along with artifacts from burial mounds at the park. Munson was apparently trying to evade the proposed provisions of the Native American Graves Protection and Repatriation Act (NAGPRA), which was passed by Congress that year.[8]

It provides for artifacts and bones to be returned or repatriated by governmental agencies and other institutions to tribes who are affiliated with the peoples who buried the items. Tracing the bones could have demonstrated a link to the affiliated tribes and required return of both the remains and related artifacts from grave goods. Without that evidence, most of the artifacts have been retained by the park museum. The government conducted a five-year investigation through the US Attorney's Office, following questions raised in 2011 by Iowa Tribe of Kansas and Nebraska member Patt Murphy. As tribal representative under NAGPRA to receive "remains and funerary objects for repatriation and reburial," he had requested an inventory from the national monument of all remains and goods, which they could not provide. This began the inquiry. Murphy has praised the work of the US Attorney's Office and others in this case.[8]

Munson was sentenced to a year of home detention, 10 weekends in jail, and paying "$108,905 in restitution for the damage he caused to the bones and a $3,000 fine."[8] Munson had retired from the National Park Service in 1994. In 2016 at age 76, he is suffering cognitive difficulties.

From 1999 to 2009, Superintendent Phyllis Ewing "oversaw more than $3 million in illegal construction of boardwalks, trails and other structures that damaged irreplaceable archaeological artifacts."[9] She failed to conduct consultation with affiliated American Indian tribes and follow procedures of the National Historic Preservation Act and other statutes. The Park Service conducted an internal investigation, finding numerous violations but no intent to damage the park.[9]

Jim Nepstad, who was appointed superintendent at the monument in 2011, is working to restore those disturbed areas of the park. He is also working to rebuild the Park Service's standing with area residents and members of the site’s affiliated American Indian tribes.[9]

See also[edit]


  1. ^ "Listing of acreage as of December 31, 2011". Land Resource Division, National Park Service. Retrieved May 13, 2012. 
  2. ^ "NPS Annual Recreation Visits Report". National Park Service. Retrieved May 13, 2012. 
  3. ^ "Effigy Mounds". National Park Service. 
  4. ^ National Park Service. "Effigy Mounds NM Historic Resource Study: Appendix A". Retrieved May 15, 2006. 
  5. ^ "Effigy Moundbuilders - Effigy Mounds National Monument (U.S. National Park Service)". www.nps.gov. Retrieved 2015-10-06. 
  6. ^ Iowa Archeology; http://www.nps.gov/archeology/sites/npsites/effigyMounds.htm
  7. ^ "Effigy Mounds Historic Resource Study", Chapter 3, Environment, National Park Service, Retrieved July 10, 2007
  8. ^ a b c d Hopper, Frank (2016-07-14). "Home detention for Park Service grave robber". Indian Country Today. Retrieved 2016-07-15. 
  9. ^ a b c Love, Orlan (May 10, 2014). "Effigy Mounds report to be released Monday". The Gazette. Gazette Communications, Iowa. Retrieved March 6, 2015. 

External links[edit]