Casper Bluff Land & Water Reserve

Not only does Casper Bluff Land & Water Reserve boast some of the most commanding views of the Mississippi River and its backwater sloughs, it is also an archaeologically significant site. The 85-acre site contains the Aiken Mound Group, named for the nearby community of Aiken. Our knowledge of these mounds stems from 1900, when William Baker Nickerson, an amateur archaeologist who worked for the railroads, documented 51 mounds at this location: 38 long, wall-like structures, 12 conical mounds, and one thunderbird effigy. Nickerson also observed an earth ellipse or hut-ring and two circular depressions.

Nickerson’s limited excavation of the mounds in 1900 produced pottery fragments, indicating the fill may have come from a nearby habitation site. Archaeologists from the University of Chicago visited the site in 1926; however, only 40 mounds were observed at that time. In 2006, Phil Millhouse from the University of Illinois was able to relocate Nickerson’s original map, kept at the Illinois State Museum. Using GIS technology, the location of all 51 mounds documented by Nickerson have been identified. At the present, however, only 20 mounds can be visually identified on the ground surface. Agricultural cropping and grazing have no doubt affected the integrity of the mounds.

The Aiken Mound Group is part of the larger Effigy Mound culture that existed between A.D. 700 and A.D. 1000 in Wisconsin, Iowa, Minnesota and Illinois. While most of what is known about the site is based on the mounds themselves, there is a possibility that there may still be intact archaeological features among the mounds. Skeletal remains from the Aiken Mounds have been found in adjacent crop fields. Habitation sites, while not mapped, were thought to occur in the nearby low-lying fields east of the steep river bluffs where the ceremonial mounds are located.

While the Effigy Mound peoples are thought to have abandoned the region after A.D. 1000, as late as 1875 members of the Ho-Chunk Nation performed ceremonies in the vicinity of Aiken Mounds and constructed a burial mound for the son of their leader, Green Blanket. This burial site is thought to be located one mile east of the reserve within the bottomlands of Small Pox Creek.

Upcoming Events

Fantastic Frogs & Friends Frog Walk

April 27 @ 6:00 pm - 8:00 pm

Bring the whole family to Fantastic Frogs & Friends, a frog walk beginning on the east side of the Meeker Street footbridge along the Galena River Trail in downtown Galena, IL. Learn all about frogs and toads, join us in a toast to spring, and then take part in a guided hike down the trail […] Read More

Find out more »

Bluebird & Red-headed Woodpecker Workshop

April 28 @ 9:00 am - 12:00 pm

Everyone is invited to enjoy a workshop on two of our most beautiful native birds, bluebirds and red-headed woodpeckers. This morning workshop will be filled with interesting and colorful information about these beautiful birds, including how you can help monitor bluebird trails and local woodpecker populations, and even attract them to your property. You are […] Read More

Find out more »

JDCF’s Portage Site: A Center of Native American History

May 12 @ 9:00 am - 12:00 pm

All tours are full.  Due to the amount of interest in this event, we are planning a fall tour.  Dates are TBD.

Find out more »

Valley of Eden Bird Sanctuary Grand Opening

June 2 @ 9:00 am - 12:00 pm

Join us for the grand opening of our newest preserve, a 405-acre bird sanctuary donated to JDCF by former Stockton resident Nancy Hamill Winter.  We will be joined by the Hoo Haven Wildlife Rehabilitation and Educational Center with Marshmallow, their Educational American White Pelican.  To date, there have been documented sightings of over 100 different […] Read More

Find out more »