Nine-Mile Island (Mississippi River)

Last updated
Nine-Mile Island
Nickname: Shinkles Island
Geography
LocationUpper Mississippi River
Coordinates 42°26′10″N90°34′30″W / 42.436°N 90.575°W / 42.436; -90.575
Area454 acres (184 ha)
Length2 mi (3 km)
Width.5 mi (0.8 km)
Administration
United States
StateIowa

Nine-Mile Island is a river island located in Mosalem Township, Dubuque County, Iowa, between Dubuque, Iowa and Bellevue, Iowa on the Upper Mississippi River.

River island Exposed land within a river.

A river island is any exposed land surrounded by river water. Properly defined it excludes shoals between seasonally varying flows and may exclude semi-coastal islands such as in deltas.

Dubuque County, Iowa County in the United States

Dubuque County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 93,653. The county seat is Dubuque. The county is named for Julien Dubuque, the first European settler of Iowa.

Dubuque, Iowa City in Iowa, United States

Dubuque is the county seat of Dubuque County, Iowa, United States, located along the Mississippi River. In 2017, the population of Dubuque was 57,637.

Contents

Geography

Nine-Mile Island is situated within Pool 12 of the Upper Mississippi River, between Locks and Dams Nos. 11 and 12. The head (northwestern end) of the island is at UMR river mile 574.3, with the southeastern end at mile 571.5. It is about 2 miles long and .5 mile at its widest point, with a total area of 454 acres. [1]

Lock and Dam No. 11 lock and dam on the Mississippi River located between Dubuque, Iowa and rural Grant County, Wisconsin, USA

General Zebulon Pike Lock and Dam No. 11 is a lock and dam located between Dubuque, Iowa and rural Grant County, Wisconsin, on the Upper Mississippi River.

Lock and Dam No. 12 lock and dam on the Mississippi River at Bellevue, Iowa, USA

Lock and Dam No. 12 is a lock and dam located on the Upper Mississippi River at Bellevue, Iowa, United States. The movable portion of the dam starts at the locks adjacent to the Iowa shore and is 849 feet (258.8 m) long, consisting of seven tainter gates and three roller gates. It connects to a 200-foot (61.0 m) storage yard and continues toward the Illinois shore with a 2,750-foot (838.2 m) non-submersible dike, a 1,200-foot (365.8 m) submersible dike and a 3,130-foot (954.0 m) non-submersible dike. The non-submersible sections are separated from the submersible section with two 120-foot (36.6 m) transitional dikes. The main lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long. There is also an incomplete auxiliary lock. In 2004, the facility was listed in the National Register of Historic Places as Lock and Dam No. 12 Historic District, #04000172 covering 1,017 acres (4.1 km2), 1 building, 3 structures, and 4 objects.

The island is immediately downriver from Frentress Lake, site of a popular marina in East Dubuque, Illinois and the former dock of the Silver Eagle Casino. It is adjacent to the unincorporated community of Massey, Iowa, which houses marina facilities. The island is bordered on the southwest by Molo Slough and on the northeast by the USACE's nine-foot navigation channel. Since it is on the Mississippi River, Nine-Mile Island is on the extreme eastern side of Iowa, adjacent to its border with Illinois.

East Dubuque, Illinois City in Illinois, United States

East Dubuque is a city in Jo Daviess County, Illinois, United States. The population was 1,704 at the 2010 census, down from 1,995 in 2000. East Dubuque is located alongside the Mississippi River. Across the river is the city of Dubuque, Iowa. About three miles north of the city is the Illinois – Wisconsin border.

United States Army Corps of Engineers federal agency under the Department of Defense and a major Army command

The United States Army Corps of Engineers (USACE) is a U.S. federal agency under the Department of Defense and a major Army command made up of some 37,000 civilian and military personnel, making it one of the world's largest public engineering, design, and construction management agencies. Although generally associated with dams, canals and flood protection in the United States, USACE is involved in a wide range of public works throughout the world. The Corps of Engineers provides outdoor recreation opportunities to the public, and provides 24% of U.S. hydropower capacity.

Mississippi River largest river system in North America

The Mississippi River is the second-longest river and chief river of the second-largest drainage system on the North American continent, second only to the Hudson Bay drainage system. Its source is Lake Itasca in northern Minnesota and it flows generally south for 2,320 miles (3,730 km) to the Mississippi River Delta in the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains all or parts of 32 U.S. states and two Canadian provinces between the Rocky and Appalachian mountains. The main stem is entirely within the United States; the total drainage basin is 1,151,000 sq mi (2,980,000 km2), of which only about one percent is in Canada. The Mississippi ranks as the fourth-longest and fifteenth-largest river by discharge in the world. The river either borders or passes through the states of Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana.

The USACE also maintains two aids to navigation on the island: Nine-Mile Island Daybeacon at UMR river mile 573.5, and Nine-Mile Island Light at mile 571.5, both on the right descending bank. [2]

History

The island's name comes from the fact that its head is located nine river miles below Eagle Point ( 42°32′06″N90°38′42″W / 42.535°N 90.645°W / 42.535; -90.645 ). It was also historically known as Shinkles Island, as evidenced by the Army Corps' Shinkles Island Bar Daybeacon at UMR mile 574.1 on the left descending bank (Illinois side of the river). [3]

The island was also the site of a steamboat race in 1885 between the DAN THAYER and CLYDE. [4]

Paddle steamer steamship or riverboat powered by a steam engine that drives paddle wheels

A paddle steamer is a steamship or riverboat powered by a steam engine that drives paddle wheels to propel the craft through the water. In antiquity, paddle wheelers followed the development of poles, oars and sails, where the first uses were wheelers driven by animals or humans.

Conservation

Nine-Mile Island is densely forested, save for a sandy beach at the head of the island which is popular with vacationers. The area is characterized by numerous sloughs and backwaters, and the island surrounds Horseshoe Lake and Green Lake. Classified as public land, the island is part of both the Upper Mississippi River National Wildlife and Fish Refuge and the Driftless Area National Wildlife Refuge.

Prior to the construction of dams on the Upper Mississippi, thousands of wingdams regulated the flow of the river. Multiple remnants of these common structures are still present near the island. There is also a 1/2-mile revetment on the north side of the island and a 1/4-mile revetment on the southeastern end. [5]

Recreation

Since the island is just southeast of the Dubuque metropolitan area, it is a popular destination for boaters and picnickers. There are no roads on the island. Boats must be careful not to drop anchor at the head of the island, since there is an underground natural gas pipeline buried there, formerly owned by Enron Gas Pipeline Co. [6]

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Nine Mile Island may refer to:

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References

  1. "Electronic Code of Federal Regulations" . Retrieved 2011-03-21.
  2. "Upper Mississippi River Navigation Charts" (PDF). Retrieved 2011-03-21.
  3. "Upper Mississippi River Navigation Charts" (PDF). Retrieved 2011-03-21.
  4. "RiverWeb - Harry G. Dyer" . Retrieved 2011-03-21.
  5. "Upper Mississippi River Navigation Charts" (PDF). Retrieved 2011-03-21.
  6. "Upper Mississippi River Navigation Charts" (PDF). Retrieved 2011-03-21.