§ 7.02.03. Impervious surface coverage.

A.

Generally. Impervious surface on a development site shall not exceed the ratios provided in the table in paragraph E of this section.

B.

Ratio calculation. The impervious surface ratio is calculated by dividing the total impervious surface by the gross site area. Water bodies, including wet retention areas, shall be excluded from the gross site area and from the total impervious surface area when calculating the impervious surface ratio.

C.

Treatment of cluster development. Cluster development or other site design alternatives shall be planned in such a manner that no individual lot within a development project exceeds the applicable impervious surface ratio. The developer may request a variance from this provision as described in article XI of this Code. Upon review, the board of adjustment may require, as a condition of approval, deed restrictions or covenants that guarantee the maintenance of necessary open space in perpetuity.

D.

Alternative paving materials. If porous paving materials are approved for use by the county engineer, then the area covered with porous paving materials shall not be counted as impervious surface.

E.

Table of impervious surface ratios.

Zoning District		Maximum ISR
A	Agriculture	Not applicable
RSF	Residential single-family	0.40
RSF-E	Residential single-family-estate	0.20
RG	Residential general	0.60
RR	Rural residential	0.20
RM	Residential mixed	0.40
RMH	Residential mobile home	0.40
NC-1	Neighborhood commercial-1	0.70
NC-2	Neighborhood commercial-2	0.70
C	Commercial	0.90
C-1	Light commercial	0.90
C-2	Heavy commercial	0.90
C-RV	Commercial-recreational vehicle	0.70
I-1	Light industrial	0.90
I-2	Heavy industrial	0.80
PS	Public service	0.80
PD	Planned Development	Not applicable

 

The maximum impervious surface ratio is given for each district, regardless of the type of use proposed and allowable pursuant to article II. Ratios shown are maximums and development specific review may reduce the ratio in a particular case. See comprehensive plan for any further limitations on specific uses and land use categories.

Where a lot is 8,000 square feet or less, an ISR of 0.50 should be substituted.

An ISR of 0.90 may be granted by special exception for certain uses in the NC-2 zoning district.

An ISR of 0.90 is established for the C, C-1, C-2 and I-1 zoning districts when located in the commercial corridor mixed use and commercial activity center future land use classifications, provided that an ISR of 0.90 does not exceed the ISR as established by the Okeechobee County Comprehensive Plan as adopted or amended. For C, C-1 or C-2 zoning districts located in a rural activity center future land use classification, the ISR shall be as for neighborhood commercial.

When in the commercial corridor, resort corridor or a commercial activity center, an ISR of 0.80 should be substituted.

Specific impervious surface ratios are not established for planned development districts, but development in such districts should approximate the ISR as established for the that type of development in other zoning districts.

(Ord. No. 94-8, § 1 (7.02.03A, E), 10-5-94; Ord. No. 95-1, § 1 (7.02.03), 6-8-95; Ord. No. 97-02, § 1, 2-27-97; Ord. No. 2002-04, § 1(Exh. A), 9-26-02; Ord. No. 2005-12, § 2(Exh. A), 7-28-05)