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This chapter's protection standard is based on the countywide flood insurance study ("FIS") for Kane County, Illinois, and incorporated areas, prepared by the federal emergency management agency ("FEMA") and dated November 2, 1995, which FIS shall be and is superseded and is to be replaced by a new study effective June 2, 2015. The base flood or 100-year frequency flood elevations shall be governed by the November 2, 1995 FIS and FIRM until June 1, 2015, and thereafter by the new FIS and FIRM issued by FEMA and effective on June 2, 2015, and thereafter by any other revision(s) and/or amendment(s) to same.
If the base flood elevation or 100-year frequency flood elevation is not available for a particular site, then the protection standard shall be according to the best of existing data available in the "Illinois State Water Survey's Flood Plain Information Repository". When a party disagrees with the best available data, he/she may pay for the detailed engineering study needed to replace existing data with better data and submit it to DWR and FEMA.
A. The base flood or 100-year frequency flood elevation for the SFHAs of Hampshire Creek tributary shall be as delineated on the 100-year flood profiles in the countywide flood insurance rate map ("FIRM") including territory within the village, prepared by FEMA, and dated November 2, 1995, and shall be as delineated on the new FIRM issued by FEMA and effective June 2, 2015, from and after that date, and shall be as delineated in the future on such revision(s) and amendment(s) to said FIRM as may be approved from time to time.
B. The base flood or 100-year frequency flood elevation for the SFHAs of those parts of unincorporated Kane County that are within the extraterritorial jurisdiction of the village or that may be annexed into the village shall be as delineated on the 100-year flood profiles in the countywide FIS of Kane County, Illinois, and incorporated areas, prepared by FEMA and dated November 2, 1995, and shall be as delineated on the new FIS issued by FEMA and effective June 2, 2015, from and after that date, and shall be as thereafter delineated on such amendments or revisions to such FIS and/or FIRM as may be prepared from time to time.
C. The base flood or 100-year frequency flood elevation for such SFHA delineated as an "AH zone or AO zone" shall be that elevation (or depth) delineated on the countywide FIRM of Kane County, Illinois, and incorporated areas, prepared by FEMA and dated November 2, 1995, and delineated on the new FIRM issued by FEMA and effective June 2, 2015, from and after that date.
D. The base flood or 100-year frequency flood elevation for each of the remaining SFHAs delineated as an "A zone" on the countywide FIRM for Kane County, Illinois, and incorporated areas, prepared by FEMA, and dated November 2, 1995, and delineated on the new FIRM issued by FEMA and effective June 2, 2015, from and after that date, shall be according to the best existing data available in the "Illinois State Water Survey Flood Plain Information Repository". When no base flood or 100-year frequency flood elevation exists, the base flood or 100-year frequency flood elevation for a riverine SFHA shall be determined from a backwater model, such as HEC-II, WSP-2 or a dynamic model such as HIP. The flood flows used in the hydraulic model shall be obtained from a hydrologic model such as HEC-I, TR-20, or HIP, or by techniques presented in various publications prepared by the United States geological survey for estimating peak flood discharges. Flood flows should be based on anticipated future land use conditions in the watershed as determined from adopted local and regional land use plans. Along any watercourses draining more than one square mile, the above analyses shall be submitted to DWR for approval. Once approved it must be submitted to the "Illinois State Water Survey Flood Plain Information Repository" for filing. For a nonriverine SFHA, the base flood elevation shall be the historic flood of record plus three feet (3'), unless calculated by a detailed engineering study and approved by the Illinois state water survey. (Ord. 15-06, 2-5-2015)
A. Development in and/or filling of the flood fringe will be permitted if protection is provided against the base flood or 100-year frequency flood by proper elevation and compensatory storage and other provisions of this Chapter are met.
B. No use will be permitted which adversely affects the capacity of drainage facilities or systems.
C. Developments located within the flood fringe shall meet the requirements of this Section, along with the requirements of Article V of this Chapter. (Ord. 91-20, 12-12-1991)
No person, firm, corporation, or governmental body not exempted by State law shall commence any development in the SFHA without first obtaining development permit from the Village.
A. Application for a development permit shall be made on a form provided by the Village. The application shall be accompanied by drawings of the site, drawn to scale, showing property line dimensions and legal description for the property and sealed by a licensed engineer, architect or land surveyor; existing grade elevations in M.S.L., 1929 adj. datum or NGVD and all changes in grade resulting from excavation or filling; the location and dimensions of all buildings and additions to buildings. For all proposed buildings, the elevation of the lowest floor (including basement) and lowest adjacent grade shall be shown on the submitted plans and the development will be subject to the requirements of Article V of this Chapter.
B. Upon receipt of a development permit application, the Village Engineer shall compare the elevation of the site to the base flood or 100-year frequency flood elevation. Any development located on land that can be shown to have been higher than the base flood elevation as of the site's first Flood Insurance Rate Map identification is not in the SFHA and, therefore, not subject to the requirements of this Chapter. The Village shall maintain documentation of the existing ground elevation at the development site and certification that this ground elevation existed prior to the date of the site's first Flood Insurance Rate Map identification.
C. A soil erosion and sedimentation control plan for disturbed areas shall be submitted. This plan shall include a description of the sequence of grading activities and the temporary sediment and erosion control measures to be implemented to mitigate their effects. This plan shall also include a description of final stabilization and revegetation measures and the identification of a responsible party to ensure post-construction maintenance.
D. The Village Engineer shall be responsible for obtaining from the applicant, copies of all other local, State and Federal permits, approvals or permit-not-required letters that may be required and shall not issue a permit unless all other local, State and Federal permits have been obtained. (Ord. 91-20, 12-12-1991)
A. No development in the flood fringe shall create a threat to public health and safety.
B. If fill is being used to elevate the site above the base flood or 100-year frequency flood elevation, the applicant shall submit sufficient data and obtain a letter of map revision (LOMR) from FEMA for the purpose of removing the site from the flood plain. (Ord. 91-20, 12-12-1991)
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