Environmental Rules in Bonner County, ID (2026)
6 rules for unincorporated Bonner County, Idaho.
Verified from official government sources
Stormwater Management
Development in unincorporated Bonner County, Idaho must handle a 25 year design storm, hold and treat the first one-half inch of runoff, and avoid any increase in peak runoff for subdivisions and commercial projects. Section 12-726 sets these standards, and violations cost $300.00 per day.
Bonner County Stormwater Performance Standards for Development
Some RestrictionsBonner County Revised Code § 12-726
B. Collection And Conveyance System: No stormwater shall be collected or concentrated, except within a channel or artificial watercourse protected against erosion and containing energy dissipation measures to prevent erosion on adjoining lands. ... C. Disposal System: The disposal component of a stormwater management system shall have the capacity to collect, convey and provide detention for a ...
Erosion Control
In unincorporated Bonner County, Idaho, grading and excavation of more than 50 cubic yards triggers a written grading/erosion plan filed with the Planning Department, with the bar lower near lakes, streams and 15 percent slopes. Section 12-724.2 lists what the plan must show, and violations carry a $300.00 per day civil penalty.
Bonner County Erosion Control Plan Rules for Construction
Some RestrictionsBonner County Revised Code § 12-724.2
A. Drawings of an appropriate scale, not to exceed one hundred feet to the inch (1" = 100') showing the areas of land disturbing activities, surface water bodies and watercourses, utilities, easements, areas subject to clearing, grading and for stockpiling of topsoil. B. Location of temporary erosion and sedimentation control measures. C. Location of permanent erosion and sedimentation control ...
Flood Zones
In unincorporated Bonner County, Idaho, no one starts development inside a Special Flood Hazard Area without a Floodplain Development Permit from the Planning Department. The Board of County Commissioners adopted the 2014 FEMA flood study and maps by reference, and violations are misdemeanors.
Bonner County Idaho Floodplain Development Permit Rules
Some RestrictionsBonner County Revised Code § 14-303
A Floodplain Development Permit shall be required in conformance with the provisions of this title prior to the commencement of any development activities within Special Flood Hazard Areas determined in accordance with the provisions of BCRC 14-402.
Boat Dock Permits
In unincorporated Bonner County, Idaho, community docks and marinas with upland accommodations need a conditional use permit in the Commercial and Recreation zones, and the use table lists them in no other district. The code defines the use as moorage run as a business open to the public or as a private club for members.
Community Dock and Marina Permits in Unincorporated Bonner County
Significant RestrictionsBonner County Revised Code § 12-335
Use Zoning District F A/F R S C I RSC REC AV ... Docks and marinas, community, upland C C accommodations (5), (6), (7) ... (5) Sufficient land area is required to accommodate the proposed use, and the use and any appurtenant structures shall be so arranged on the land as to minimize any adverse effects on surrounding properties. The use shall not create particular hazards to adjacent properties...
Defensible Space
In unincorporated Bonner County, Idaho, every proposed lot in a subdivision must be designed with a fire protection plan that assesses fire risk, plans to reduce it, and provides defensible space. The plan must also meet at least one of four listed options in Bonner County Revised Code § 12-623 D.
Defensible Space for New Lots in Unincorporated Bonner County, Idaho
Some RestrictionsBonner County Revised Code § 12-623
D. All proposed lots shall be designed by the applicant to provide a fire protection plan for the proposed lots to provide, at a minimum, an assessment of fire risk and plans to reduce the risk, and provisions for defensible space, where material capable of allowing a fire to spread unchecked will be treated, cleared or modified to slow the rate and intensity of an advancing wildfire and to cre...
Flood Elevation Requirements
In unincorporated Bonner County, Idaho, new and substantially improved residential and non-residential buildings in a Special Flood Hazard Area need the lowest floor, basement included, at least one foot above the Base Flood Elevation. Where no BFE exists, the floor is set two feet above the highest adjacent grade.
Bonner County Idaho Base Flood Elevation and Freeboard Rules
Some RestrictionsBonner County Revised Code § 14-502
A. Residential Construction. ... New construction and substantial improvement of any residential structure (including manufactured homes) shall have the lowest floor, including basement, elevated no lower than one foot above the Base Flood Elevation, as defined in Chapter 2 of this title, except as provided in this section. ... 5. In unnumbered A zones where a base flood elevation has not been ...
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