08/17/2026
After hitting a deer on the way home from GreenIsland Wildlife Preserve I figured I'd spend the two weeks at home doing a little research rather than renting a loaner.
OTISVILLE — THE MILL COMMUNITY ALONG ELK CREEK
BEFORE OTISVILLE HAD A NAME
The documented history of this place begins on February 1, 1848, when the federal government issued a patent to Thomas Cole and Joseph Grimes for forty acres in the northeast quarter of the southeast quarter of Section 10 in Elk Township.
The 1882 History of Clayton County records that Joseph Grimes and James Cole built a sawmill in Section 10 in 1848. Grimes operated a sawmill on Elk Creek for three years before returning to Colony Township. He later served in the Iowa House, the Iowa Senate and several local offices.
The Cole family also had an early connection to nearby Colesburg. Colesburg history records that James and Thomas Cole established a general store there in 1849.
THE OTIS FAMILY BUILDS A COMMUNITY
Isaac Otis and his son opened Elk Township’s first blacksmith shop and store in Section 10 in 1852. Isaac Otis Sr. was one of the township’s organizers and first officers. He made the township ballot box that was reportedly still being used in 1886.
The 1882 county history credits Isaac Otis Jr. with building a woolen mill in 1860. The growing settlement became known as Otisville, while advertisements also used the name Elk Mills.
By 1866, Isaac Otis & Brother were advertising their new woolen factory on Elk Creek as being in successful operation. The factory produced full cloth, cassimeres, flannels and stocking yarn. Experienced workers from eastern factories had been hired to operate it.
A larger 1867 advertisement offered custom wool work and cloth, flannels, blankets and yarn. The products could be purchased for cash or received in exchange for wool.
ELK CREEK MADE IT POSSIBLE
Everything depended upon the water.
A dam across Elk Creek backed up a millpond. Water was carried through a millrace to the mill machinery before returning to the creek. An 1868 advertisement announced that the Otis company had installed an American double-turbine water wheel. The mill claimed that it could grind between fifteen and twenty bushels an hour.
The setting must have been beautiful. Elk Creek flowed north through a narrow valley bordered by steep, wooded hills. The pond rested behind the dam, the millrace carried water toward the mills, and the mill buildings stood close to the creek.
A BRIDGE AND THE ROADS THAT MET THERE
Otisville was also a crossroads.
In April 1874, Clayton County acted on a road petition submitted by Isaac Otis and others. G. Cooley was appointed commissioner to establish the road, and the county appropriated $200 from its bridge fund.
Otisville’s covered wooden bridge carried the east–west road directly across Elk Creek. East of the bridge, the road continued along the route now recognized as C Level Road. West of the creek, travelers passed the mills and climbed the steep, winding wagon roads leading out of the valley. A separate road followed the valley north and south.
Farmers coming from different directions met at Otisville to have grain ground, wool processed, machinery repaired or goods purchased. The roads, bridge and mills made this small place a genuine center of activity.
WOOL CAME IN — CLOTH WENT OUT
The Elk Valley Woolen Mills drew business from both Clayton and Delaware counties.
In 1877, Isaac Otis advertised for any amount of wool. Farmers could exchange their wool for cloth, flannels and yarn or receive the highest market price in cash. A report from 1879 described a large force of men working at the factory and praised the mill’s fair dealing.
In 1881, Otis advertised for 10,000 pounds of wool. That same year, he offered to exchange a one-set woolen mill, its waterpower and an adjoining farm for a flour mill.
OTISVILLE AT ITS HEIGHT
An 1886 history called Otisville the main business center of Elk Township. It reported that approximately $40,000 had been invested there in sawmills, gristmills, the woolen factory and roller mills.
The newest roller mill could produce fifty barrels of flour a day. It required more than 4,000 bushels of wheat each month and about 50,000 bushels a year. At the prices then being paid, the mill distributed about $40,000 annually among area farmers.
Other industries developed nearby. The Elk Valley lime kilns were established in 1870 and had produced about 5,000 barrels of lime by 1886. John Pilkington opened a brickyard in 1871 that manufactured approximately half a million bricks before it closed.
Elk Township had 1,083 residents in 1886, along with nine schools, fifty-seven miles of roads, two churches and four cemeteries. Otisville was never just an isolated mill. It belonged to a working community of farmers, millers, merchants, craftspeople and families.
THE END CAME QUICKLY
The signs of change appeared before the final flood. Isaac Otis was already offering the woolen mill, waterpower and adjoining farm in exchange for a flour mill in 1881.
By June 1890, the Otisville mill had closed and its machinery was being removed to Elkport. Heavy water then washed out the mill dam. Without the dam, waterpower and operating mills, the reason for the settlement’s existence was gone.
The Otis milling story continued elsewhere. An 1895 profile in American Miller followed Isaac Otis through later milling ventures in Minnesota, Wisconsin and Dunlap, Iowa. At Dunlap, Otis and his sons Clarence and Grant rebuilt their roller mill after it burned on September 15, 1890.
THE BRIDGE OUTLIVED THE VILLAGE
Otisville’s one covered bridge survived the closing of the mills.
After the village was abandoned, the bridge was dismantled and reassembled on the Edgewood–Luxemburg road near the area now known as Twin Bridges Park. A 1930 newspaper account said that the bridge had served Otisville for forty years. During that time, hundreds of barrels of flour crossed it on their way to loading points for shipment as far away as England.
When the Edgewood–Luxemburg road was widened, local residents tried to preserve the old bridge. Despite those efforts, it was eventually dismantled.
WHAT REMAINS
The mills, dam, millpond, millrace and covered bridge are gone, but the shape of the place remains.
Elk Creek still winds north through the narrow valley. C Level Road preserves the eastern approach to the old crossing, while the steep hills west of the creek show what wagon travel once required.
Otisville disappeared because the mills disappeared. For several decades, however, this little place beside Elk Creek was one of the most important working centers in Elk Township—a community built by waterpower, connected by roads and remembered through the records its people left behind.
Sources include the 1848 federal land patent; the 1882 History of Clayton County; the 1886 Clayton County plat; the North Iowa Times; Elkader Weekly Register; Otis mill advertisements from 1866–1881; American Miller; and the June 29, 1930 Dubuque Telegraph-Herald and Times-Journal. Joseph Grimes’s public career is also documented by the Iowa Legislature.
