2011-08-02_PERMIT FILE - M1996052

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The FHDP application was submitted for a gravel mining operation known as the Firestone Resource Pit. The subject property is bounded by WCR 15 on the west, WCR 17 on the east, WCR 26.7 on the north, and WCR 26 on the south. A portion of the property is located in the St. Vrain Creek Special Flood Hazard Areas (SFHA), also known as the 100 -year floodplain and is designated as Zone A on Flood Insurance Rate Map (FIRM) Panel 080266 - 0855C. This designation indicates that there are published no base flood elevations (BFEs) and floodway boundaries established for St. Vrain Creek on the current effective FIRM dated September 28, 1982. All F1RMs are prepared, distributed, managed, and revised by the Federal Emergency Management Agency (FEMA). Development activities located in a FEMA regulatory floodplain or floodway are subject to the requirements of Title 44 of the Code of Federal Regulations (CFR), Parts 60 and 65. The proposed sand and gravel operations will include a temporary modular office structure, sand and gravel processing plant, truck scales, and on -site parking. Because more the 5 acres of land is being disturbed, FEMA in a letter dated June 17, 2011, informed the applicant that a Letter of Map Revision was required in order for Weld County to remain in compliance with FEMA's National Flood Insurance Program. The applicant's engineer made the argument that the property is completely out of the floodplain based a revised HEC -RAS model which ties into the St. Vrain Lakes CLOMR. While the St. Vrain Lakes CLOMR has not been officially adopted by FEMA as the current effective mapping, the model can be used as best available data. The St. Vrain Lakes model was extended to include the Firestone Resource Pit property. While the updated modeling shows the property to be entirely outside of the floodplain and floodway, it has not been officially adopted by FEMA. As such, FEMA's current floodplain as depicted on FIRM Panel 080266 -0855C remains in force and the property will be subject to regulation under the current floodplain regulations. It is the County's understanding that the applicant will be applying to FEMA to have the property removed from the floodplain based on a Letter of Map Revision. The FHDP application includes the following documentation: 1. Flood Hazard Development Permit Application 2. A cover letter and narrative that is stamped, signed, and dated by Aaron Asquith, P.E. number 36602 and Jacob James, P.E. number 44218 and dated May 2, 2011 3. HEC =RAS printouts showing the cross sections and stream profile 4. Special Warranty Deed with legal description and special exceptions 5. Flood Hazard Development Map that is stamped, signed, and dated by Aaron Asquith, P.E. number 36602 and Jacob James, P.E. number 44218 and dated May 2, 2011 6. A cover letter and responses to comments that is stamped, signed, and dated by Aaron Asquith, P.E. number 36602 and Jacob James, P.E. number 44218 and dated June 3, 2011 7. Flood Hazard Development Map that is stamped, signed, and dated by Aaron Asquith, P.E. number 36602 and Jacob James, P.E. number 44218 and dated June 2, 2011 8. A cover letter and responses to comments that is stamped, signed, and dated by Aaron Asquith, P.E. number 36602 and Jacob James, P.E. number 44218 and dated July 11, 2011 Page 3 of 6 M:IPLANNING — DEVELOPMENT REVIEVAFHDP -Flood Hazard Development Pennit'Am263 LG Everist Firestone Gravel Pit1AmFHDP- 263 LG Everist Firestone Resource Pit Conditional Approval 07- 28- 2011.doc