Lewis and Clark County Archive collections include materials of historical interest and research value from the earliest days of governmental operations within historic Edgerton and its successor Lewis and Clark County. Papers dating from the early 1860s to present times are represented in the collections along with maps and photographs, ephemera, real estate and property documents, election materials, official declarations and findings, court documents, road and bridge plans, correspondence relating to various county offices, plans and mining records. The Archives serves as an adjunct to materials held by offices such as the clerk and recorder, clerk of courts, the superintendent of schools and other depositories regulated, required or established by statute. The collection is also adjunct to those materials of sufficient value to warrant acquisition by the State Archives. The collection serves as a reference center for legal questions when historical documentation is required and also provides historical background for studies on land development, environmental changes and phenomena (floods, etc), road and route development and uses, agricultural history, mining and construction. Its materials show the processes employed by county government over the decades and reveal legal and commercial relationships from various eras. Finally, the Archives catalogs the materials and provides means of public access to the collections as well as seeing to their proper storage and their promotion as items of historical relevance.