Del Norte County Code
20 - Zoning
47 - Flood Damage Prevention
40 - Administration
A. Establishment of Development Permit. A development permit shall be obtained before any
construction or other development, including manufactured homes, begins within any area
of special flood hazards, established in Section 20.47.030B. Application for a
development permit shall be made on forms furnished by Del Norte County and may
include, but not be limited to plans in triplicate drawn to scale showing:
1. The nature, location, dimensions and elevation of the area in question, existing or
proposed structures, storage of materials and equipment and their location;
2. Grading information showing existing and proposed contours, any proposed fill, and drainage facilities;
3. Proposed locations of water supply, sanitary sewer, and other utilities;
4. Location of the regulatory floodway when applicable;
5. Base flood elevation information as specified in 20.47.030.B or 20.47.040.C.2;
6. Proposed elevation in relation to mean sea level, of the lowest floor (including
basement) of all structures;
7. Proposed elevation in relation to mean sea level to which any structure will be
floodproofed, as required in 20.47.050.AJ;
8. All appropriate certifications listed in subsection (C)( 4) of this section; and
9. Description of the extent to which any watercourse will be altered or relocated as a
result of proposed development.
10. Certification from a registered civil engineer or architect that the nonresidential
floodproofed building meets the floodproofing criteria in 20.47.050.A.3.b.
11. For a crawl-space foundation, location and total net area of foundation openings\' as required in 20.47.050J.c of this ordinance and detailed in FEMA Technical Bulletins 1-93 and 7-93.
B. Designation of the Floodplain Administrator. The Director of the Community
Development Department is appointed to administer and implement this chapter by
granting or denying development permits in accordance with its provisions.
C. Duties and Responsibilities of the Floodplain Administrator. The duties and
responsibilities of the floodplain administrator shall include, but not be limited to:
1. Permit Review.
a. Review all development permits to determine that the permit requirements of this chapter have been satisfied;
b. All other required state and federal permits have been obtained;
c. The site is reasonably safe from flooding;
d. The proposed development does not adversely affect the carrying capacity of areas where base flood elevations have been determined but floodways have not been determined. 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 not increase the water surface elevation of the base flood more than one foot at any point within Del Norte County.
e. All Letters of Map Revision (LOMR\'s) 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 (CLOMR\'s). Approved CLOMR\'s allow construction of the proposed flood control project and land preparation as specified in
the "start of construction" definition.
2. Use of Other Base Flood Data. When base flood elevation data has not been provided in
accordance with Section 20.47.030B, the floodplain administrator shall obtain, review and
reasonably utilize any base flood elevation and flood way data available from a federal,
state or other source including but not limited to the 1964 flood elevation levels and the
county drainage plan, in order to administer Section
3. Whenever a watercourse is to be altered or relocated:
a. Notify adjacent communities and the California Department of Water Resources prior
to such alteration or relocation of a watercourse, and submit evidence of such
notification to the Federal Insurance Administration;
b. Require that the flood-carrying capacity of the altered or relocated portion of the
watercourse is maintained.
4.Base Flood Elevation changes due to physical alterations:
a. Within 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
b. All Letters of Map Revision (LOMR\'s) 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 (CLOMR\'s). Approved CLOMR\'s
allow construction of the proposed flood control project and land preparation as \'
specified in the "start of construction" definition.
Such submissions are necessary so that upon confirmation of those physical changes
affecting flooding conditions, risk premium rates and floodplain management
requirements are based on current data.
5. 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.
6. Obtain and maintain for public inspection and make available as needed:
a. The certification required by Section 20.47.0S0(A)(3)(a) (lowest floor
b. The certification required by Section 20.47.0S0(A)(3)(b) (elevation or
floodproofing of nonresidential structures);
c. The certification required by Section 20,47.0S0(A)(3)(c) (wet floodproofing
d. The certified elevation required by Section 20.47.050(C)(2), subdivisions and
other proposed development standards;
e. The certification required by Section 20.47.0S0(E)(1), floodway encroachments;
f. The information required by Section 20.47.050(F)(6), coastal construction
7. Map Determination. Make interpretations where needed, as to the exact location of the
boundaries of the areas of special flood hazards (for example, where there appears to
be a conflict between a mapped boundary and actual field conditions). The person
contesting the location of the boundary shall be given a reasonable opportunity to
appeal the interpretation as provided in Section 20.47.070.
8. Take action to remedy violations of this chapter as specified in Section 20.47.030C.
9. Maintain a record of all variance actions, including justification for their issuance, and
report such variances issued in its biennial report submitted to the Federal Emergency
10. Complete and submit the Biennial Report to the Federal Emergency Management
11. Assure the community\'s General Plan is consistent with floodplain management
(Ord. 95-15 (part), 1995, 2010)