An anchor found in the St. Croix River
The park's museum collection consists of a large archeological collection (72,117) curated at the Midwest Archeological Center in Lincoln, Nebraska and a smaller collection mainly located at the Riverway Headquarters. The on-site collection contains approximately 300 items, which are on exhibit or in storage at Riverway Visitor Centers. The collection includes both natural and cultural objects. They have been obtained on loan, by purchase, as gifts and from field collections. Objects with adequate documentation have been cataloged. Additional natural history specimens are expected to be received as a result of research conducted for the Riverway. The park intends to curate a baseline native mussel collection in response to the zebra mussel threat. Few cultural objects are expected to be added, except by field collection or gift. Thus the park collection is expected to see limited growth.