Division 4

PROVISIONS FOR FLOOD HAZARD REDUCTION

==> picture [192 x 79] intentionally omitted <==

----- Start of picture text -----
Share Download Bookmark Print
----- End of picture text -----

The standards set forth in this division are required in all areas of special flood hazards. (Ord. #133, §8-4831; Ord. #2002-02, §2)

==> picture [192 x 79] intentionally omitted <==

----- Start of picture text -----
Share Download Bookmark Print
----- End of picture text -----

a. All new construction and substantial improvements shall be anchored to prevent flotation, collapse or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy.

b. All manufactured homes shall meet the anchoring standards of subsection 32-117.38.b. (Ord. #133, §8-4832; Ord. #2002-02, §2)

==> picture [192 x 78] intentionally omitted <==

----- Start of picture text -----
Share Download Bookmark Print
----- End of picture text -----

All new construction and substantial improvements shall be constructed:

a. With flood resistant materials as specified in FEMA Technical Bulletin TB 2-93, and utility equipment resistant to flood damage;

b. Using methods and practices that minimize flood damage;

c. With electrical, heating, ventilation, plumbing and air conditioning equipment and other service facilities that are designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding. (Ord. #133, §8-4833; Ord. #2002-02, §2)

==> picture [192 x 79] intentionally omitted <==

----- Start of picture text -----
Share Download Bookmark Print
----- End of picture text -----

(See definitions for "basement," "lowest floor," "new construction," "substantial damage" and "substantial improvement").

a. Residential construction, new or substantial improvement shall have the lowest floor, including basement, elevated to or above one (1) foot above the base flood elevation. Base flood elevation shall be determined by one (1) of the methods in 32-117.23.b of this section.

b. Nonresidential construction shall either be elevated in conformance with subsection (a) or together with attendant utility and sanitary facilities:

1. Be floodproofed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water;

2. Have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy; and

3. Be certified by a registered professional engineer or architect that the standards of this subsection are satisfied. Such certifications shall be provided to the Development Services Director.

c. All new construction and substantial improvements with fully enclosed areas below the lowest floor (excluding basements) that are usable solely for parking of vehicles, building access or storage, and which are subject to flooding shall be designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwater. Designs for meeting this requirement shall follow the guidelines in FEMA Technical Bulletins TB 10-93 and TB 7-93, and must exceed the following minimum criteria:

1. Have a minimum of two (2) openings having a total net area of not less than one (1) square inch for every square foot of enclosed area subject to flooding. The bottom of all openings shall be no higher than one (1) foot above grade. Openings may be equipped with screens, louvers, valves or other coverings or devices provided that they permit the automatic entry and exit of floodwater; or

2. Be certified by a registered professional engineer or architect.

d. Manufactured homes shall meet the standards in this section and also the standards in subsection 32-117.38.

e. Upon the completion of new structures or substantial improvements in Zone A, the elevation of the lowest floor including basement shall be certified by a registered professional engineer or surveyor, and verified by the community building inspector to be properly elevated. Such certification and verification shall be provided to the Development Services Director. (Ord. #133, §8-4834; Ord. #2002-02, §2)

Disclaimer: This Code of Ordinances and/or any other documents that appear on this site may not reflect the most current legislation adopted by the Municipality. American Legal Publishing provides these documents for informational purposes only. These documents should not be relied upon as the definitive authority for local legislation. Additionally, the formatting and pagination of the posted documents varies from the formatting and pagination of the official copy. The official printed copy of a Code of Ordinances

legislation adopted by the Municipality. American Legal Publishing provides these documents for informational purposes only. These documents should not be relied upon as the definitive authority for local legislation. Additionally, the formatting and pagination of the posted documents varies from the formatting and pagination of the official copy. The official printed copy of a Code of Ordinances

should be consulted prior to any action being taken. For further information regarding the official version of any of this Code of Ordinances or other documents posted on this site, please contact the Municipality directly or contact American Legal Publishing toll-free at 800-445-5588.

Hosted by: American Legal Publishing

==> picture [528 x 549] intentionally omitted <==

----- Start of picture text -----
Back to Code Library
----- End of picture text -----

==> picture [443 x 663] intentionally omitted <==

==> picture [443 x 63] intentionally omitted <==

Previous Doc

Next Doc

==> picture [443 x 663] intentionally omitted <==

==> picture [443 x 63] intentionally omitted <==

0 items available

32-117.23

Select Language Powered by Translate

Skip to code content (skip section selection)

2026 S-18 (current) 2026 S-18 (current)

Compare to:

• No Earlier Versions -

Danville Overview

Danville, CA Municipal Code DANVILLE, CALIFORNIA MUNICIPAL CODE VOLUME I GENERAL REGULATIONS

VOLUME II DEVELOPMENT

CHAPTER XXX RESERVED* CHAPTER XXXI SUBDIVISION* CHAPTER XXXII PLANNING AND LAND USE* ARTICLE I GENERAL PROVISIONS ARTICLE II DEFINITIONS ARTICLE III PLANNING APPLICATIONS ARTICLE IV: DECISION MAKING AUTHORITY AND REVIEW PROCESS ARTICLE V ZONING MAP; DISTRICTS ESTABLISHED ARTICLE VI DISTRICT REGULATIONS ARTICLE VII ADDITIONAL REQUIREMENTS FOR DEVELOPMENT ARTICLE VIII SPECIAL LAND USES ARTICLE IX SIGNS AND OUTDOOR ADVERTISING* ARTICLE X TRANSPORTATION IMPROVEMENT PROGRAM FEE DIVISION THREE REGIONAL TRANSPORTATION FEES ARTICLE XI RESERVED ARTICLE XII* ADULT ENTERTAINMENT BUSINESSES ARTICLE XIII AGRICULTURAL LAND CONSERVATION ARTICLE XIV LAND DEDICATION FOR SCHOOL PURPOSES

ARTICLE XV FLOOD DAMAGE PREVENTION

32-117 FLOOD DAMAGE PREVENTION REGULATIONS.

32.117.5 - 32.117.10 Reserved. Division 2 APPLICATIONS Division 3 ADMINISTRATION

32-117.21 Establishment of Development Permit.

32-117.22 Designation of Development Services Director.

32-117.23 Duties and Responsibilities of the Development Services Director.

32-117.24 - 32-117.30 Reserved.

Division 4 PROVISIONS FOR FLOOD HAZARD REDUCTION

Division 5 FLOOD HAZARD VARIANCE PROCEDURES

32-118 - 32-121 RESERVED.

ARTICLE XVI REGULATIONS INVOLVING SPECIFIC USES ARTICLE XVII NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM ARTICLE XVIII USE AND LIMITS

ARTICLE XIX HAZARDOUS WASTE MANAGEMENT PLAN

==> picture [528 x 130] intentionally omitted <==

----- Start of picture text -----
Annotations Off Follow Changes Share Download Bookmark Print
----- End of picture text -----

CHAPTER XXXII PLANNING AND LAND USE*

==> picture [192 x 79] intentionally omitted <==

----- Start of picture text -----
Share Download Bookmark Print
----- End of picture text -----

This section and the various parts thereof are hereby declared to be severable. Should any subsection of this section be declared by the courts to be unconstitutional or invalid, such decision shall not affect the validity of the section as a whole, or any portion thereof other than the subsection so declared to be unconstitutional or invalid. (Ord. #133, §8-4817; Ord. #2002-02, §2)

==> picture [192 x 78] intentionally omitted <==

----- Start of picture text -----
Share Download Bookmark Print
----- End of picture text -----

32-117.18—32-117.20 Reserved.

==> picture [192 x 78] intentionally omitted <==

----- Start of picture text -----
Share Download Bookmark Print
----- End of picture text -----

Division 3 ADMINISTRATION

==> picture [192 x 78] intentionally omitted <==

----- Start of picture text -----
Share Download Bookmark Print
----- End of picture text -----

A Development Permit must be obtained before construction or development begins within any area of special flood hazard established in subsection 32-117.12. Application for a Development Permit shall be made on forms furnished by the Development Services Director and may include, but not be limited to: plans in duplicate drawn to scale showing the nature, location, dimensions, and elevation for the area in question; existing or proposed structures, fill, storage of materials, drainage facilities, and the location of the foregoing. Specifically, the following information is required:

a. Site plan, including, but not limited to:

1. For all proposed structures, spot ground elevations at building corners and twenty (20) foot or smaller intervals along the foundation footprint, or one (1) foot contour elevations throughout the building site; and

2. Proposed locations of water supply, sanitary sewer, and utilities; and

3. If available, the base flood elevation from the Flood Insurance Study and/or Flood Insurance Rate Map; and

4. If applicable, the location of the regulatory floodway;

• b. Foundation design detail, including, but not limited to:

1. Proposed elevation in relation to mean sea level of the lowest floor (including basement) of all structures; and

2. For a crawl space foundation, location and total net area of foundation openings as required in 32-117.34.c of this section and FEMA Technical Bulletins 1-93 and 7-93; and

3. For foundations placed on fill, the location and height of fill, and compaction requirements (compacted to ninety five (95%) percent using the Standard Proctor Test method);

c. Proposed elevation in relation to mean sea level to which any nonresidential structure will be floodproofed, as required in 32-117.34.b of this section and FEMA Technical Bulletin TB 3-93; and

• d. All appropriate certifications listed in 32-117.23.e of this section; and

• e. Description of the extent to which any watercourse will be altered or relocated as a result of proposed development. (Ord. 133, §8-4821; Ord. #2002-02, §2)

==> picture [192 x 79] intentionally omitted <==

----- Start of picture text -----
Share Download Bookmark Print
----- End of picture text -----

The Development Services Director is appointed to administer and implement this section by granting or denying development permit applications in accordance with its provisions. (Ord. #133, §8-4822; Ord. #2002-02, §2)

==> picture [192 x 78] intentionally omitted <==

----- Start of picture text -----
Share Download Bookmark Print
----- End of picture text -----

32-117.23 Duties and Responsibilities of the Development Services Director.

The duties and responsibilities of the Development Services Director include, but are not limited to, the following:

a. Development Permit Review. The Development Services Director shall review all development permits to determine that:

1. The permit requirements of this section are 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 section, "adversely affect" 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 (1) foot at any point.

b. Use of Other Base Flood Data. When base flood elevation data have not been provided in accordance with subsection 32-117.12, Basis for Establishing the Areas of Special Flood Hazard, the Development Services Director shall obtain, review, and reasonably utilize any base flood elevation and floodway data available from a Federal, State or other source in order to administer Division 4 of this section. Any such information shall be submitted to the Town Council of the Town of Danville for adoption; or

c. If no base flood elevation data is available a base flood elevation shall be obtained using one of two 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 Division 4:

1. Simplified method:

(a) One hundred (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

(b) Base flood elevation shall be obtained using the Quick-2 computer program developed by FEMA; or

2. Detailed method:

(a) One hundred (100) year or base flood discharge shall be obtained using the U.S. Army Corp of Engineers' HEC-HMS computer program; and

(b) Base flood elevation shall be obtained using the U.S. Army Corps of Engineers' HECRAS computer program.

• d. Notification of Other Agencies. In alteration or relocation of a watercourse:

1. Notify adjacent communities and the California Department of Water Resources prior to alteration or relocation;

2. Submit evidence of such notification to the Federal Insurance Administration, Federal Emergency Management Agency; and

3. Assure that the flood carrying capacity within the altered or relocated portion of said watercourse is maintained.

• e. Information to be Obtained and Maintained. The Development Services Director shall obtain and maintain for public inspection and make available as needed the following:

1. The certification required in section 32-117.34.a and Section 32-117.38 (flood elevations);

2. The floodproofing certification required in section 32-117.34.b (elevation or floodproofing of nonresidential structures);

3. The certification required in section 32-117.34.c.1 or 32-117.34.c.2 (wet floodproofing standard);

4. The certification required in section 32-117.37.b (subdivision standards);

5. The certification required in section 32-117.39.a (floodway encroachments).

• f. Alteration of Watercourses. Whenever a watercourse is to be altered or relocated, the Development Services Director shall:

1. Notify adjacent communities and the California Department of Water Resources prior to any alteration or relocation of a watercourse, and submit evidence of such notification to the Federal Insurance Administration; and

2. Require that the flood carrying capacity of the altered or relocated portion of said watercourse be maintained.

g. Interpretation of FIRM Boundaries. The Development Services Director shall 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, grade and base flood elevations shall be used to determine the boundaries or the special flood hazard area). The person contesting the location of the boundary shall be given a reasonable opportunity to appeal the interpretation as provided in Division 5 of this section.

h. Remedy Violations. The Development Services Director shall take action to remedy violations of this section as specified in subsection 32-117.13.

i. Appeals. The Town of Danville shall hear and decide appeals when it is alleged there is an error in any requirement, decision, or determination made by the Development Services Director in the enforcement or administration of this section. (Ord. #133, §8-4823; Ord. #2002-02, §2)

==> picture [192 x 79] intentionally omitted <==

----- Start of picture text -----
Share Download Bookmark Print
----- End of picture text -----

32-117.24—32-117.30 Reserved.

==> picture [192 x 79] intentionally omitted <==

----- Start of picture text -----
Share Download Bookmark Print
----- End of picture text -----