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is a civil township of Kalkaska County in the U.S. state of Michigan. As of the 2000 census, the township population was 2,382.
The first permanent white settler in what is now Kalkaska County was William George Copeland, a farmer born in Nottinghamshire, who located there in the fall of 1855, while it was still attached to Grand Traverse County. For the next twelve years, he and his wife were the only permanent white residents of the county. A dam had been built on the Barker Creek about the time Copeland moved there, but a planned mill was never built. The next permanent resident in the township was William H. Bockes, a native of Medina County, Ohio and a Civil War veteran. In June 1866, he purchased land in the township near Barker Creek. After returning to Ohio to marry his wife in October, they both returned immediately to take up residence. Another early resident in the Barker Creek area was John H.F. Letherby, born in England and moved to Canada at the age of 16. He settled in section 32 near Barker Creek in October 1866.
In section 36 in the southeast corner of the township, a few related families originally from Susquehanna County, Pennsylvania, made their homes. D.P. Beebe, another Civil War veteran, was the first to arrive in the spring of 1867. Norman Ross, his father-in-law came in the summer of 1867 and became the first township supervisor when it was organized. A.C. Beebe, also a Civil War veteran, came in May 1868.
Elisha W. Clement, from Brantford, Ontario settled in section 14 in December 1867. Albert T. Kellogg, from Cortland County, New York, settled in section 14 in September 1868.
Kalkaska County remained unorganized and attached to first Grand Traverse County and then Antrim County until an act of the Michigan Legislature of January 27, 1871. Rapid River Township was the first township organized in the county, while it was still attached to Antrim County for administrative purposes. The township was organized in 1868 so that residents in the area would be able to vote in the presidential election without having to travel all the way to Antrim County. At that time, Rapid River Township encompassed several townships that were later separately organized. Clearwater Township was originally organized as "Round Lake" by an act of the Michigan Legislature on January 18, 1871, and was renamed Clearwater Township in January 1873. A post office with the name of "Clear Water" had been established in May 1869 and renamed "Clearwater" in December 1873. There was also a post office at Barker Creek from February 1874 until May 1937. Barker Creek was a station on the Chicago and West Michigan Railway (now the Pere Marquette Railroad).