Springfield, IL Environmental Rules: Boat Dock Permits (2026)

06 governs any floodway identified on the countywide flood insurance rate map, plus any other floodplain without a delineated floodway, and bars development that would increase flood heights or velocities or threaten public health and safety. Rather than requiring every project to prove that individually, subsection (a) lists specific activities the city automatically treats as meeting that no-rise standard, including minor boat docks that satisfy the Illinois Department of Natural Resources, Office of Water Resources (IDNR/OWR) Statewide Permit Number 5, alongside items like aerial utility crossings under Permit 4 and bank stabilization under Permit 9.

A dock that qualifies for Statewide Permit 5 doesn't need a separate no-rise certification from Springfield to proceed. Anything that doesn't fit the listed statewide permits, including larger or non-minor docks, falls under subsection (b): it can only be permitted if IDNR/OWR has issued a permit for the work (or confirms in writing that one isn't required), or if enough data is submitted to FEMA and approval is obtained to revise the regulatory floodway map and base flood elevation. 07(f)'s accessory-structure standards if they function as buildings: non-habitable use only, located outside the floodway or holding the appropriate state/federal permits, flood-resistant materials below the base flood elevation, and a market value under $15,000 or footprint under 600 square feet. 05 development permit from the city's floodplain reviewer, backed by IDNR/OWR paperwork, before construction starts.