Areas designated as floodways located within the special flood hazard areas established in section 15.32.060B. The floodways are extremely hazardous areas due to the velocity of floodwaters that have erosion potential and carry debris and potential projectiles. The following provisions, in addition to standards outlined in sections 15.32.110 and 15.32.120, shall apply to all development within such areas:
A. No encroachments, including fill, new construction, substantial improvements, and other developments shall be permitted unless:
1. It is demonstrated that the proposed encroachment would not result in any increase in the flood levels during the occurrence of the base flood, based on hydrologic and hydraulic analyses performed in accordance with standard engineering practice and presented to the Floodplain Administrator prior to issuance of floodplain development permit This is a no-rise analysis and certification; or
2. Conditional letter of map revision (CLOMR) has been approved by FEMA. A letter of map revision (LOMR) must also be obtained within six (6) months of completion of the proposed encroachment.
B. If division A is satisfied, all development shall comply with all applicable flood hazard reduction provisions of this chapter.
C. Manufactured homes may be permitted provided the following provisions are met:
1. The anchoring and the elevation standards of section 15.32.120C; and
2. The encroachment standards of division A.
D. Other Development In Regulated Floodways:
1. Fences that have the potential to block the passage of floodwaters, such as stockade fences and wire mesh fences, in regulated floodways shall meet the limitations of this section.
2. Retaining walls, bulkheads, sidewalks, and driveways that involve the placement of fill in regulated floodways shall meet the limitations of this chapter.
3. Roads and watercourse crossings, including roads, bridges, culverts, low-water crossings, and similar means for vehicles or pedestrians to travel from one side of a watercourse to the other side, which encroach into regulated floodways, shall meet the limitations of this ordinance. The applicant/developer shall submit an application for a letter of map revision (LOMR) upon completion of construction for the purpose of providing FEMA better available data.
4. Drilling water, oil, and/or gas wells including fuel storage tanks, apparatus, and any equipment at the site that encroach into regulated floodways shall meet the limitations of this chapter.
5. Docks, piers, boat ramps, marinas, moorings, decks, docking facilities, port facilities, shipbuilding, and ship repair facilities that encroach into regulated floodways shall meet the limitations of this chapter.
6. Gravel and sand and their subsequent extraction on lands within the special flood hazard area that encroach into regulated floodways shall meet the limitations of this chapter. A reclamation plan bond for LOMR shall be posted by the mine/property owner with City of Pocatello to cover the estimated costs of a reclamation LOMR as determined by the mine/property owner and shall provide supporting documentation for the estimated LOMR cost. A reclamation LOMR shall be completed within one year of the completion of mining. Upon failure of the property owner to obtain a reclamation LOMR of the mining site within one year, the reclamation plan bond for LOMR will be forfeited. (Ord. 3054, 2020)