Iron County Conservation District
Soil Erosion - Sedimentation Control Program
2 South 6th Street, #15
Schedule of Fees
For Soil Erosion And Sediment Control Permits
Permits, Applications, & Work Plans
The following work plans can be downloaded or printed via Adobe Acrobat Reader.
General Requirements and Standards
For Soil Erosion and Sediment Control Plans
Temporary Erosion/Sediment Control Measures:
Erosion and sediment controls are required for earth changes above the waterline to prevent sediment from entering the water.
Permanent Erosion/Sediment Control Measures:
In all areas of channeled flow, if the water velocity is between 4cfs and 5cfs for a 25-yr/24hr storm, the channel shall be restored with pegged sod or other pre-approved equivalent. The sod shall extend a minimum of 1' above the channel bottom, measured vertically, or above the normal depth of flow for a 25yr/24hr storm, whichever is greatest.
In all areas of channeled flow, if the water velocity is greater than 6cfs for a 25yr/24hr storm, the channel shall be armored with rip-rap, pavement, or other pre-approved equivalent materials. The armor shall extend a minimum of 1' above the channel bottom, measured vertically, or above the normal depth of flow for a 25yr/24hr storm, whichever is greatest.
Regardless of the velocity, all areas of channeled flow having a continuous base-flow shall be permanently stabilized with rip-rap, pavement, or other pre-approved method (bioengineering is encouraged). The rip-rap, pavement, etc, shall extend above the channel bottom to the normal depth of the base-flow. The surfaces within the channel above the normal depth of base-flow must be restored according to the velocity and normal depth requirements for a 25yr/24hr storm, whichever is greatest.
All rip-rap shall be sized such that the smallest stones will not be displaced by the water velocities resulting from a 25yr/24hr storm. The depth of the rip-rap shall be 1.5 times the smallest stone dimension or 8" whichever is greatest. All rip-rap shall be underlain by geo-textile fabric. All rip-rap shall be entrenched such that the top of the rip-rap is to the line of the adjacent ground.
Where subsurface water movement or excavation below the water table may cause seeps, soil erosion, soil slippage, sloughing, craving or other earth movement, adequate subsurface drainage facilities and permanent surface stabilization measures shall be installed as necessary to prevent slope instability, soil erosion, and sedimentation.
The same end result of structural stability is required for an earth impoundment. The suitability of the in-place foundation soils must be analyzed; the embankment cross-section, soils, compaction, outlet structures, etc. must be engineered to prevent slope instability, piping, seepage, settlement, etc. This also applies to existing earth fills that will be subjected to an increase in the backwater elevation due to an alteration of the drainage structures or due to storm water diversions. Anti-seepage collars must be installed on all impoundment pipe outlets. On the interior surfaces of an impoundment, the permanent stabilization method, materials, plant surfaces, etc. must be carefully chosen to insure that the method is appropriate for the range of water level fluctuations and/or inundation duration and frequency of occurrence.
The existing surface cover types must also be analyzed and modified as necessary in areas that are not being disturbed but will be experiencing a change in water velocities, the range of water level fluctuations, and/or inundation duration and frequency of occurrence due to storm water diversions and/or alterations of drainage control structures. The State law requires that all drainage conveyances be designed to prevent erosive velocities, therefore, in the locations where the existing ground surface cover will be subjected to erosive water velocities as a result of this project, the use of energy dissipaters and velocity control structures will be required unless all affected surfaces protected as necessary to prevent long term erosion problems.
The plans must show detail drawings of the configuration and dimensions of all rip-rap culvert aprons, energy dissipater, spillways, and down drains. All rip-rap down drains and impoundment spillways must be engineered using the USDA "Rock Chute" design method or other appropriate engineered method.
The Iron County Conservation District is a unit of local government established to assist the landowners and residents of Iron County. Our office is located in the basement of the Courthouse complex. We specialize in promoting conservation practices in Agricultural and Natural Resource fields. Our goals are to improve and protect the resources of Iron County so that they can be utilized to their fullest potential. We advocate the wise use of natural resources that they may be an economic boost to Iron County.
Gail Dalpra is the Administrator of the Conservation district office. Her duties include the day to day operations of the office, running the annual spring seedling sale, developing educational programs for area schools, renting the district's No Till Drill, and assisting residents/landowners with any questions or concerns they may have regarding natural resources. The District has assumed the responsibility of enforcing the Soil Erosion and Sedimentation Control program for the county. As required under Michigan law, a "soil and Sed." permit is required for any earth disturbing construction that is within 500 feet of a lake stream or wetland (or larger than 1 acre in size regardless of proximity to water). The law requires that each county operates a program and enforces these laws at the county level. The Soil Erosion and Sedimentation Control Permit Application and Exemption letter can be downloaded for convenience.
The conservation district is governed by a 5-person board of elected residents who are committed to promoting conservation practices and to the success of the district. The members of the board are: Gerald Divine(Chair), Lisa Masnova (Vice-Chair), Dave Stanek (Treasurer), Jim Stewart (Secretary) and Dale Carlson (Director). The Iron Conservation District holds its monthly meetings on the third Tuesday of each month at 6:30 p.m. in the Construction Code conference room, courthouse basement.
If you have any questions or would like additional information on these programs please give the Iron Conservation District a call at (906) 875-3765 or e-mail at firstname.lastname@example.org.