South Yankton, Nebraska

Green Island, 10.5 square miles of land in northwestern Cedar County, Nebraska bordering the Missouri River across from Yankton, SD, was home to Strahmburg a former town on the island. Green Island and Strahmburg have had their names used interchangeably over the years because, in part, the post office in Strahmburg was officially designated as Green Island. Supposedly Green Island acquired its name came the color of its lush vegetation. Though called an island, it was physically connected to Nebraska by a swampy, low-lying area along its southern edge[1]. Both were destroyed by the Great Flood of 1881 on the Missouri. Their history is better understood knowing the braided, meandering, flood-prone history of the Missouri River in that area. Completion of Gavins Point Dam in 1957, 5 miles upriver from the former location of Strahmburg, greatly reduced the risk of floods on the river. Today the Missouri National Recreational River, 59-miles between Gavins Point Dam and Ponca State Park, has restrictions on commercial development. Early maps indicate the presence of numerous islands some of which, like Green Island, no longer exist.

The Missouri National Recreational River is a National Recreational River located on the border between Nebraska and South Dakota. The designation was first applied in 1978 to a 59-mile section of the Missouri River between Gavins Point Dam and Ponca State Park. In 1991, an additional 39-mile section between Fort Randall Dam and Niobrara, Nebraska, was added to the designation. These two stretches of the Missouri River are the only parts of the river between Montana and the mouth of the Missouri that remain undammed or unchannelized. The last 20 miles of the Niobrara River and 6 miles of Verdigre Creek were also added in 1991. The Missouri National Recreational River is managed by the National Park Service, with headquarters located in Yankton, South Dakota. Visitor centers are located at Ponca State Park, Niobrara State Park and the Lewis and Clark Visitor Center at Gavins Point Dam, overlooking Lewis and Clark Lake. It lies in parts of Boyd, Cedar, Dixon, and Knox counties in Nebraska, and Bon Homme, Charles Mix, Clay, Union, and Yankton counties in South Dakota.

The Meridian Highway Bridge is a bridge that formerly carried U.S. Route 81 across the Missouri River between Nebraska and South Dakota. The Meridian Highway Bridge connects Yankton, South Dakota with rural Cedar County, Nebraska. The Meridian Bridge is a double-deck bridge, with the top level having carried traffic into South Dakota from Nebraska, and the lower level having carried traffic into Nebraska from South Dakota. It was closed to all traffic in 2008, but reopened for use only by pedestrians and bicycles in 2011.

The Ohlman-Shannon House is a historic house in Yankton, South Dakota. It was built in 1871 for Charles Mclntyre, who sold it to Martin P. Ohlman, Sr. in 1878. Ohlman was a real estate investor who served as the president of the American National Bank and as a director and treasurer of the Yankton Bridge and Ferry Company. The house remained in the Ohlman family until 1975, when his granddaughter, married to William Shannon, sold it to John Harmelink. It was designed in the Italianate architectural style. It has been listed on the National Register of Historic Places since May 28, 1976.

The Harold A. (H.A.) Doyle House is a historic house in Yankton, South Dakota. It was built in 1924 for Harold A. Doyle, a trial lawyer, and designed in the American Craftsman style by architect William L. Steele. It has been listed on the National Register of Historic Places since October 25, 1990.

The Dr. John Trierweiler House is a historic house in Yankton, South Dakota. It was built in 1926-27 for Dr. John Trierweiler. It was designed in the Georgian Revival architectural style by Kings & Dixon. It has been listed on the National Register of Historic Places since May 7, 1980.It was designed by architects Kings & Dixon of Mitchell, South Dakota.

The Charles Gurney Hotel is a historic three-story building in Yankton, South Dakota. Replacing the original St. Charles Hotel (constructed in 1870 by J.W.C. Morrison of local cottonwood lumber), the present building was built in 1891 with brick and Sioux Falls granite. It was designed in the Richardsonian Romanesque Revival style by architect J.H. Coxhead. It was originally known as the Hotel Pierce, and it was built where the 1870 St. Charles Hotel once stood. It was later renamed the Portland Hotel by its new owner, Alfred Crebbin, presumably in recognition of the importance of the local manufacture of Portland cement (see Western Portland Cement plant). In the 1940s, it was acquired and remodelled by Charles Gurney, and it became known as the Charles Gurney Hotel. It was purchased by Elza Anderson in 1962. It has been listed on the National Register of Historic Places since August 3, 1979.

The Bruce-Donaldson House is a historic two-story house in Yankton, South Dakota. It was built in 1879 for James E. Bruce, who sold it to Fred Donaldson, an immigrant from Sweden who became a grocer in Yankton. It was designed in the Italianate architectural style. It has been listed on the National Register of Historic Places since March 5, 1982.

The Yankton Carnegie Library is a historic building in Yankton, South Dakota. It was built as a Carnegie library in 1902–03, and is Neoclassical style in style. It was built by German-born contractor August Goetz. It was a public library from 1903 to 1973.It served as the town's library from 1903 to 1973, and later served as the Lewis and Clark Mental Health Center.It has been listed on the National Register of Historic Places since August 7, 1979.

The Bishop Marty Rectory is a historic one-story building on the campus of Mount Marty College in Yankton, South Dakota. It was built in 1883 as a Roman Catholic rectory, and Bishop Martin Marty moved in the following year. It has been listed on the National Register of Historic Places since December 27, 1974.

The Dr. B.M. Banton House is a historic two-story house in Yankton, South Dakota. It was built in 1920-1921 and designed in the California bungalow style by Dr. B.M. Banton, a dentist. It has been listed on the National Register of Historic Places since October 8, 1987.

The Governor John L. Pennington House, at 410 E. Third St. in Yankton, South Dakota, was built in 1875. Also known as South Dakota Magazine Office in 1987, it is a simplified Italianate-style building. It was registered with the National Register of Historic Places in 1988.It was home during 1875 to 1891 of Dakota Territory governor John L. Pennington who served as governor for a four-year term from 1874 to 1878.