The Tremper Mound and Earthworks are located on privately owned land about five miles north of Portsmouth on SR 73 on a plateau overlooking the Scioto River.

The Hopewell culture (100 B.C. to 500 A.D.) of prehistoric Native American people built the Tremper Mound and many of the earthworks in the Portsmouth area.
 

The Tremper Earthworks included an earthen enclosure roughly in the shape of an oval with flattened sides. The oval was 480 feet by 407 feet with an opening in the southwestern part of the enclosure. At the center of the enclosure was a large, irregularly-shaped mound. Some people believed it was an effigy mound built in the shape of an animal, such as a tapir or even an elephant. Neither of these creatures lived in North America at the time the mound was built. It is still not clear if the mound had been built as an effigy.

The most significant discovery made at Tremper Mound was a collection of more than 500 objects that had been deliberately broken up and left in one of the eastern side chambers. Included in this deposit were 136 smoking pipes, most of which had been made from catlinite or pipestone. Ninety of these were effigy pipes and were carefully sculpted in the shapes of a variety of creatures. Some of the pipes look like hawks, owls, herons, and cranes. Other pipes resemble bears, wolves, dogs, beavers, cougars, otters, and turtles. Native American spiritual leaders may have used these pipes, and the animals may represent an individual's guardian spirit. All of these pipes apparently were gathered together, smashed to bits, and buried beneath this mound.

The Tremper Mound and Earthworks site is listed on the National Register of Historic Places. Many of the Tremper pipes have been restored and are on display at the Ohio Historical Center in Columbus.

*Source - The Ohio Historical Society