Environmental Rules in Macon County, IL (2026)
5 rules for unincorporated Macon County, Illinois.
Verified from official government sources
Stormwater Management
In unincorporated Macon County, disturbing one acre or more of land, or any part of a larger development that totals an acre, requires a land disturbance permit from the Planning and Zoning Department before work starts. The county's Stormwater Management Ordinance also covers borrow pits and stockpiles over 50 cubic yards, and ties permit issuance to a stormwater pollution prevention plan.
Macon County Stormwater Land Disturbance Permit
Some RestrictionsMacon County Code §§ 152.15, 152.99
(A) Every person shall comply with the county stormwater policy for runoff control. (B) In addition, a land disturbance permit will be required to be obtained from the County Planning and Zoning Department in the following cases: (1) Land disturbing activity disturbs one or more acres of land; ... (5) The creation and use of stockpiles greater than 50 cubic yards in volume. ... Any pers...
Erosion Control
Any project in unincorporated Macon County that needs a land disturbance permit must file an erosion and sediment control plan, sealed by a qualified person, showing how the site will keep soil and sediment from washing onto streets and into drainage ways. Crews must clear tracked-out sediment by day's end and inspect disturbed ground weekly.
Macon County Construction Erosion Control Plan
Some RestrictionsMacon County Code § 152.37
(A) The erosion and sediment control plan shall accurately describe the potential for soil erosion and sedimentation problems resulting from land disturbing activity and shall explain and illustrate the measures that are to be taken to control these problems. The length in time and the complexity of the plan is to be commensurate with the size of the project, severity of the site condition, a...
Flood Zones
Anyone developing land in a Macon County floodplain, from grading to new construction, needs a development permit from the Planning and Zoning Administrator before work starts, backed by site drawings and a cost estimate. Building without one, or ignoring permit conditions, is a chapter violation carrying a fine of $50 to $750 per offense.
Macon County Floodplain Development Permit
Some RestrictionsMacon County Code §§ 151.05, 151.99
No person, firm, corporation, or governmental body not exempted by law shall commence any development in the floodplain without first obtaining a development permit from the Planning and Zoning Administrator, or other designee. The Planning and Zoning Administrator shall not issue a development permit if the proposed development does not meet the requirements of this chapter. ... (1) Drawings...
Boat Dock Permits
A minor boat dock built in a Macon County floodway does not need the county's no-rise engineering analysis if it meets the conditions of IDNR/OWR Statewide Permit Number 5; other dock work needs either an IDNR/OWR permit or FEMA approval of a revised flood map before the county's floodplain rules allow it.
Macon County Floodway Boat Dock Rules
Some RestrictionsMacon County Code § 151.06
Except as provided in division (B) of this section, no development shall be allowed which, acting in combination with existing and anticipated development will cause any increase in flood heights or velocities or threat to public health and safety. The following specific development activities shall be considered as meeting this requirement: ... (4) Minor boat docks meeting the following cond...
Flood Elevation Requirements
Macon County requires one foot of freeboard above the base flood: the county's flood protection elevation is defined as base flood elevation plus one foot. Any new floodplain building, or an addition valued over $1,000 or 70 square feet, must have its lowest floor built at or above that elevation.
Macon County Flood Elevation & Freeboard Rule
Some RestrictionsMacon County Code §§ 151.02, 151.07
FLOOD PROTECTION ELEVATION (FPE). The elevation of the base flood plus one foot of freeboard at any given location in the floodplain. ... In addition to the state permit and damage prevention requirements § 151.06, of this chapter, all buildings located in the floodplain shall be protected from flood damage below the flood protection elevation. The building protection requirement applies to the...
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