The picnic shelters and park residence are built of the brown dolomite, while the bridges, stone lodge, and lake bath house are constructed from the lighter-colored gray limestone. This light-gray to white, fine-grained limestone is the product of a clear-water shallow sea, and is well-suited to dimensioning for building stone. The limestone was extracted from several Keosauqua area quarries during the 1800s and early 1900s. The historic CCC quarry along Wesley Creek within the park, while somewhat overgrown, is still accessible by foot, and while walking along the sun-drenched quarry ledges examining the air-drilled holes, one can easily imagine industrious young crews landing their sledges on the splitting pins.
Lacey-Keosauqua State Park is an example of conservation foresight, historic construction projects, and southeast Iowa geologic history. It is a jewel in the state park system and well worth a trip into Iowa’s “Big Bend” country.