Mero Mound Group (Diamond Bluff Site)

Lock and Dam No. 3 is a lock and dam located near Red Wing, Minnesota on the Upper Mississippi River around river mile 796.9. It was constructed and placed in operation July 1938. The site underwent major rehabilitation from 1988 through 1991. The dam is 365 feet (111.3 m) long with 4 roller gates. More than 2,000 feet (609.6 m) of earth embankment with a series of upstream spot dikes completes the structure to create Pool 3. The lock chamber is 110 feet (33.5 m) wide by 600 feet (182.9 m) long. The lock and dam is owned and operated by the St. Paul District of the United States Army Corps of Engineers-Mississippi Valley Division. Today, many types of vessels use the lock which annually passes more than 11 million tons of cargo, including farm products, chemicals and crude materials as the main items shipped. Each year more than 20,000 recreational craft use Lock 3, making it one of the most popular locks on the river. Also, a number of boats involved with fishing tournament utilize the lock.

The Cannon River a tributary of the Mississippi River flows 112 miles (180 km) from Shields Lake near Shieldsville to Red Wing in the U.S. state of Minnesota, where it joins the Mississippi River. It drains a watershed approximately 1460 square miles (3,780 km²) in size. The river flows through the counties of Le Sueur, Rice, Dakota, and Goodhue. The Cannon River has few rapids, but some can be difficult (Class II). Some have claimed lives, as has the confluence with the Little Cannon River in Cannon Falls. Canoes traversing the river must portage several dams; the low header dams are more dangerous than they appear to novices. Downed trees and logjams are extreme hazards in high water, as are low bridges. The river varies in width from 50 to 200 feet (15 to 60 m).

Diamond Bluff is a town in Pierce County, Wisconsin, United States. The population was 479 at the 2000 census.

Diamond Bluff is a census-designated place in the town of Diamond Bluff, Pierce County, Wisconsin, United States. Its population was 194 as of the 2010 census.

The Prairie Island Nuclear Generating Plant is an electricity-generating facility located in Red Wing, Minnesota, along the Mississippi River, and adjacent to the Prairie Island Indian Community reservation. The nuclear power plant, which began operating in 1973, has two nuclear reactors (pressurized water reactors) manufactured by Westinghouse that produce a total 1,076 megawatts of power. Units 1 and 2 are licensed by the Nuclear Regulatory Commission (NRC) to operate through 2033 and 2034, respectively. The plant is owned by Northern States Power Company (NSP), a subsidiary of Xcel Energy, and is operated by Xcel Energy. Prairie Island is one of two nuclear power plants in Minnesota (the other being Monticello Nuclear Generating Plant in Monticello). Prairie Island has attracted controversy in the early 21st century for its operator Xcel Energy's decision to store nuclear waste in large steel casks on-site. As this area is a floodplain of the Mississippi, many opponents of the decision fear the risk of water contamination through breach of the casks during seasonal flooding of this important river. They opposed renewal of the federal license at the Prairie Island facility. In April 2008, Xcel requested that the U.S. Nuclear Regulatory Commission (NRC) renew the licenses of both reactors, extending them for an additional twenty years. The license renewals were approved in June 2011. The company has also requested NRC approval to use a similar storage system at its Monticello plant, which is currently licensed through 2030. In May 2006 repair workers at the plant were exposed to very low levels of radiation due to inhalation of radioactive iodine-131 (131I) gas. The gas leaked from the steam generators, which were opened for inspection. 131I gas is normally removed by means of a carbon-based filter; in this case the filter had developed a small leak. The NRC deemed this event to be of very low safety significance. It said that no overdose of radiation resulted in any of the workers. The winter net electrical generation is 560 MW (Unit 1) and 554 MW (Unit 2). The gross electrical generation for both units is 592 MW.

Sturgeon Lake is a lake in Goodhue County, in the U.S. state of Minnesota. Sturgeon Lake was named for the shovelnose sturgeon in its waters.

The Trimbelle River is a 29.4-mile-long (47.3 km) tributary of the Mississippi River in western Wisconsin in the United States. It flows for its entire length in western Pierce County, rising in the town of Martell and flowing generally southwardly through the towns of River Falls, Trimbelle, Trenton and Diamond Bluff. It flows into the Mississippi River about 5 miles (8 km) west of Bay City. The Trembelle has been designated by the state of Wisconsin as a Class II trout stream for brown trout. Several sections of the Trimbelle have been restored by the local chapter (KIAPTUWISH) of Trout Unlimited.

Trenton is a town in Pierce County, Wisconsin. The population was 1,737 at the time of the 2000 census. The unincorporated communities of Hager City, North Red Wing, Pucketville, and Trenton are located in the town. The unincorporated communities of Moeville and Snows Corner are also located partially in the town.

The Wind River is a minor tributary of the Mississippi River in western Wisconsin in the United States. It flows for its entire 9.0-mile (14.5 km) length in western Pierce County. It rises in the town (unincorporated jurisdiction) of Trimbelle and flows southward through the towns of Oak Grove and Diamond Bluff. Wind River joins the Mississippi near the unincorporated community of Diamond Bluff, which is within the larger jurisdiction (the town). The confluence is 801 miles (1,289 km) from the Mississippi's mouth on the Gulf of Mexico.

Treasure Island Resort & Casino is a tribal gaming facility owned and operated by the Prairie Island Indian Community (PIIC) in Welch, Goodhue County, Minnesota. It is the only casino resort in southern Minnesota located on the Mississippi River. The casino’s gaming options include slot machines; video roulette, blackjack and keno; live dealer blackjack, poker and other table games; and bingo. Additional amenities to the property include a 788-room hotel (2nd-largest in Minnesota), the Treasure Island Amphitheater (outdoors - 16,000 capacity), the Island Event Center (indoors - 2,800 capacity), a marina, RV-park, a cruise yacht, an indoor waterpark, a spa, a 24-lane bowling center and arcade, and several restaurants. Employing nearly 1,500 people, Treasure Island Resort & Casino is the largest employer in Goodhue County.