The Lamine River is a 63.8 miles (102.7 km) tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the Missouri River

Missouri River

The Missouri River flows through the central United States, and is a tributary of the Mississippi River. It is the longest river in North America and drains the third largest area, though only the thirteenth largest by discharge. The Missouri's watershed encompasses most of the American Great...

 in central Missouri

Missouri

Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...

 in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. It is formed in northern Morgan County

Morgan County, Missouri

Morgan County is a county located in the U.S. state of Missouri. As of July 2007, the population was 20,820. Its county seat is Versailles.-History :...

 about 4 miles (6 km) southeast of Otterville

Otterville, Missouri

Otterville is a city in Cooper County, Missouri, United States. The population was 476 at the 2000 census.-Geography:Otterville is located at .According to the United States Census Bureau, the city has a total area of , all of it land.-Demographics:...

 by the confluence of Flat Creek and Richland Creek, and flows generally northwardly through Cooper

Cooper County, Missouri

Cooper County is a county located in the U.S. state of Missouri. In 2010, the population was 17,601. Its county seat is Boonville. The county was organized in 1818 and is named for Sarshall Cooper, a frontier settler who was killed by Indians near Arrow Rock in 1814.-Geography:According to the 2000...

 and Pettis

Pettis County, Missouri

Pettis County is a county located in the U.S. state of Missouri. The county was organized in 1833 and is named for U.S. Congressman Spencer Darwin Pettis. As of 2000, the population was 39,403...

 counties. In northwestern Cooper County the Lamine collects the Blackwater River

Blackwater River (Missouri)

The Blackwater River is a tributary of the Lamine River in west-central Missouri in the United States. Via the Lamine and Missouri rivers, it is part of the watershed of the Mississippi River.-Course:...

 and flows into the Missouri River, 6 miles (10 km) west of Boonville

Boonville, Missouri

This page is about the city in Missouri. For other communities of the same name, see Boonville Boonville is a city in Cooper County, Missouri, USA. The population was 8,202 at the 2000 census. It is the county seat of Cooper County. The city was the site of a skirmish early in the American Civil...

.

According to the Geographic Names Information System

Geographic Names Information System

The Geographic Names Information System is a database that contains name and locative information about more than two million physical and cultural features located throughout the United States of America and its territories. It is a type of gazetteer...

, the river has also been known as "La Mine River" and as "Riviere a la Mine."