Mobridge in Walworth County, South Dakota — The American Midwest (Upper Plains)
History Beneath the Waters
A bit of history lies under the water behind Oahe Dam. Before the dam was built many islands and sandbars were commonly found along the Missouri River. When the Corps of Discovery traveled along this river on the way to the Pacific Ocean they landed on one of the now water-covered islands on October 8, 1804 and visited an Arikara village. This water-covered island (near the mouth of the Grand River close to Mobridge, South Dakota) was later dubbed Ashley Island, most likely after General William Ashley. Ashley accidentally ran his boat aground in front of the island in 1823 and the Arikaras, who had come to mistrust Euro-Americans attacked. Seventeen of Ashley's men were killed.
Today much of what Lewis and Clark observed in this area in 1804, including Ashley Island, is under water. Many features included on their maps were swallowed once the dam construction began in 1948. Today, Lake Oahe is the 4th largest man-made reservoir in the United States offering a myriad of recreational opportunities.
Background picture caption.
Sunset on the Missouri River near Mobridge, South Dakota.
Inset picture captions.
Captain William Clark and Captain William Clark's map of the area showing Ashley Island.
Erected by Lewis and Clark
Marker series. This marker is included in the Lewis & Clark Expedition marker series.
Location. 45° 33.021′ N, 100° 27.534′ W. Marker is in Mobridge, South Dakota, in Walworth County. Marker is on Lewis & Clark Interpretive Trail 1 0.1 miles south of 20th Street W. Touch for map. Park at the corner of 20th Street W. and W. Railway Street. Walk down the trail .1 miles to the markers. Marker is in this post office area: Mobridge SD 57601, United States of America.
Other nearby markers. At least 8 other markers are within walking distance of this marker. "MO.Bridge" (here, next to this marker); "Fool Soldier Band" (approx. 0.4 miles away); Mobridge Bridge (approx. 0.4 miles away); Ensign Nathaniel Pryor (approx. 0.4 miles away); Lewis & Clark (approx. 0.4 miles away); Pierre Choteau (approx. 0.4 miles away); River of Hardship (approx. 0.4 miles away); Lewis & Clark meet the Arikaras (approx. 0.4 miles away). Touch for a list and map of all markers in Mobridge.
Additional keywords. Missouri River
Categories. • Exploration • Man-Made Features • Waterways & Vessels •
Credits. This page was last revised on January 1, 2018. This page originally submitted on January 1, 2018, by Ruth VanSteenwyk of Aberdeen, South Dakota. This page has been viewed 163 times since then. Photos: 1, 2, 3. submitted on January 1, 2018, by Ruth VanSteenwyk of Aberdeen, South Dakota. • Bill Pfingsten was the editor who published this page.