The duties and responsibilities of the floodplain administrator shall include, but not be limited to:
A. Permit Review: Review all development permits to determine that:
1. The permit requirements of this chapter have been satisfied;
2. All other required state and federal permits have been obtained;
3. The site is reasonably safe from flooding; and
4. The proposed development does not adversely affect the carrying capacity of areas where base flood elevations have been determined but a floodway has not been designated. For purposes of this chapter, "adversely affects" means that the cumulative effect of the proposed development when combined with all other existing and anticipated development will increase the water surface elevation of the base flood one foot (1') or more.
B. Review, Use And Development Of Other Base Flood Data:
1. When base flood elevation data has not been provided in accordance with section 8.04.031 of this chapter, the floodplain administrator shall obtain, review and reasonably utilize any base flood elevation and floodway data available from a federal or state agency, or other source, in order to administer the provisions for flood hazard reductions in sections 8.04.050 through 8.04.057 of this chapter. Any such information shall be submitted to the town of Yucca Valley for adoption; or
2. If no base flood elevation data is available from a federal or state agency or other source, then a base flood elevation shall be obtained using one of two (2) methods from the FEMA publication "Managing Floodplain Development In Approximate Zone A Areas - A Guide For Obtaining And Developing Base (100-Year) Flood Elevations" dated July 1995, in order to administer the provisions for flood hazard reductions in part V, "Provisions For Flood Hazard Reduction", of this chapter:
a. Simplified method:
(1) 100-year or base flood discharge shall be obtained using the appropriate regression equation found in a U.S. geological survey publication, or the discharge-drainage area method; and
(2) Base flood elevation shall be obtained using the Quick-2 computer program developed by FEMA; or
b. Detailed method:
(1) 100-year or base flood discharge shall be obtained using the U.S. army corps of engineers' HEC-HMS computer program; and
(2) Base flood elevation shall be obtained using the U.S. army corps of engineers' HEC-RAS computer program.
C. Notification Of Other Agencies:
1. Alteration Of Watercourse: Whenever a watercourse is to be altered or relocated:
a. Notify adjacent communities and the California department of water resources prior to alteration or relocation;
b. Submit evidence of such notification to the federal insurance administration, federal emergency management agency; and
c. Assure that the flood carrying capacity within the altered or relocated portion of said watercourse is maintained.
2. Changes To Base Flood Elevation: Base flood elevation changes due to physical alterations:
a. Within six (6) months of information becoming available or project completion, whichever comes first, the floodplain administrator shall submit or assure that the permit applicant submits technical or scientific data to FEMA for a letter of map revision (LOMR).
b. All LOMRs for flood control projects are approved prior to the issuance of building permits. Building permits must not be issued based on conditional letters of map revision (CLOMRs). Approved CLOMRs allow construction of the proposed flood control project and land preparation as specified in the "start of construction" definition.
3. Changes In Corporate Boundaries: Notify FEMA in writing whenever the corporate boundaries have been modified by annexation or other means and include a copy of a map of the community clearly delineating the new corporate limits.
D. Documentation Of Floodplain Development: Obtain and maintain for public inspection and make available as needed the following:
2. Certification required by subsection 8.04.050C2 of this chapter, elevation or floodproofing of nonresidential structures;
3. Certification required by subsection 8.04.050C3 of this chapter, wet floodproofing standard;
4. Certification of elevation required by subsection 8.04.052B of this chapter, subdivision standards;
5. Certification required by subsection 8.04.055A of this chapter, floodway encroachments;
6. Reports required by subsection 8.04.057D of this chapter, mudflow standards.
E. Map Determinations: Make interpretations where needed, as to the exact location of the boundaries of the areas of special flood hazards. Where there appears to be a conflict between a mapped boundary and actual field condition, grade and base flood elevations shall be used to determine the boundaries of the special flood hazard area. The person contesting the location shall be given a reasonable opportunity to appeal the interpretation as provided in part VI, "Variance Procedure", of this chapter.
F. Remedial Action: Take action to remedy violations of this chapter as specified in section 8.04.032 of this chapter. (Ord. 201, 5-26-2009)