Minimum subdivision improvement standards. As a minimum standard and except as modified elsewhere herein, the existing rules and regulations of Broward County pertaining to the construction of subdivision improvements are hereby adopted. The more stringent regulation shall apply.

(Ord. No. 402-97-E, § 1, 8-26-97)

(a)

Removal of unsuitable material. Muck, marl or other unstable and unsuitable material occurring within the dedicated right-of-way of all streets or alleys shall be removed and replaced with material suitable for fill construction. The material shall be (1) clean, non-plastic and cohesionless, (2) be sand or a mixture of sand and rock, and (3) be free from stumps, large roots, bushes or other deleterious organic matter.

(b)

Waterfront improvements.

(1)

Bulkhead, seawall or slope construction: Bulkhead, seawall or slope construction shall be required along the entire length of any lake, creek, canal, river or channel for all lots or parcels of land abutting such lakes, creeks, canals, rivers or channels. The datum plane for all elevations shall be National Geodetic Vertical Datum (NGVD).

(2)

Certificate of occupancy: The certificate of occupancy shall not be issued by the city for any dwelling or other construction upon any lot or parcel of land adjacent to any lake, creek, river, canal or channel until and unless a bulkhead, seawall or slope construction as required has been provided along said lake, creek, river, canal or channel upon which said lot or parcel of land abuts.

(3)

Slope requirements: Unless bulkheads or seawalls are provided, slopes, elevations and depths shall be constructed as provided in the following and as shown on Figures IX-1 through IX-5A:

a.

The bank slope or incline from the rear property line landward shall follow the criteria shown in the applicable figure below. In all cases, the slope characteristics shall be designed to meet finished grade. Finished grade at the top of the slope shall be at least equal to the minimum flood criteria elevation established by the Broward County Water Management Division. The rear or waterfront property line shall be established as the theoretical line where the slope intersects elevation + 5.0 NOS NGVD datum.

b.

From the rear property line outward into the water area, the bank slope shall be as shown in the applicable figure below. Below elevation 0.0, the slope may be as nearly vertical as is practicable, provided that a stable slope is maintained. Where such slope is to be steeper than one (1) foot vertical to three (3) feet horizontal, soils data conforming that the proposed slope will be stable shall be submitted and approved by the department.

c.

The minimum bottom elevation of the lake, river, creek, canal or channel shall be established at an elevation which provides a minimum water depth of ten (10) feet at mean low water. If this condition is not physically able to be met due to the requirements of the slope criteria, the department may reasonably accept a lesser water depth, provided the hydraulic capacity of the water body remains within acceptable parameters.

d.

No muck or other objectionable material shall be used as fill to bring the slope area, including the area measured, five (5) feet landward from the top of slope to design fill elevation. Solid sod shall be placed from the mean water elevation to a point five (5) feet landward from the top of slope or to meet sod on the property. Sod shall be St. Augustine or Bitter Blue or approved equal and shall be fully established before acceptance, and issuance of certificate of occupancy.

e.

Where the above conditions cannot reasonably be met due to site characteristics or other restrictions, the department shall have the right to require additional safeguards to vehicular and pedestrian safety as may be required, including, but not limited to, fencing, guardrails, and/or other devices.

f.

As-built lakes and/or canal bank elevations are required prior to acceptance of the site improvements. Grade elevations must be shown at a maximum spacing of one hundred (100) feet along the banks and shall extend from top of bank to at least a depth of elevation 0.0 NGVD at each location.

(4)

Canal or lakefront maintenance easement: A canal or lakefront maintenance easement shall be granted to the city in all new subdivisions and shall be shown and set aside upon the plat submitted for city commission approval, except when the city commission requires the developer to commit to the creation of a homeowners, association for the maintenance of the lake(s), which requirement shall be reflected in the final site plan. The easement shall extend inward or landward from the rear or waterfront property line to provide an easement width of twenty (20) feet. No permanent improvements shall be constructed in this easement unless specifically approved by the city as specified elsewhere in this Code. On notice to the property owner by the city, the property owner shall, within thirty (30) days and at his expense, remove improvements within the easements unless such improvements in the opinion of the city do not interfere with its maintenance operations.

(5)

Safety device requirement for lakes: Prior to commencing construction/excavation of a lake within one thousand (1,000) feet of an existing elementary school or housing, a fence eight (8) feet in height shall be erected around the lake site. Said fence may be removed only after the department has certified in writing that the completion of construction, excavation and the completion of sloping the lake as required in this chapter has occurred. The fence may have one (1) or more gates which shall be locked during the hours that construction work is in progress.

(6)

Bulkhead or seawall requirements: A bulkhead shall be a structure placed generally parallel to the shoreline to separate land area from a water area and having as its primary purpose the retention of fill or the prevention of sliding of the land. Bulkheads shall be constructed wholly upon private property and their maintenance shall be a responsibility of the property owner. The slope or incline from the rear property line landward from the bulkhead shall not be steeper than one (1) foot vertical to four (4) feet horizontal and shall extend upwards from the rear property line to meet finish grade. Finish grade at the beginning of the slope downward to the property line shall be equal to street grade at the front of the lot. Solid sod shall be placed from the bulkhead to meet the sod on the property or a point five (5) feet landward from the top of the slope. Sod shall be St. Augustine or Bitter Blue or approved equal and shall be fully established before acceptance, and issuance of a certificate of occupancy. The bank slope or incline from the bulkhead outward into the water shall not be steeper than one (1) foot vertical to four (4) feet horizontal to an elevation of 0.0 feet NGVD. If excavation below 0.0 feet NGVD is in sound rock, the slope may be as nearly vertical as the rock will stand. The highest bottom elevation of the lake, river, creek, canal or channel shall be elevation +5.0 NGVD. The bulkhead design, drawings and specifications shall be prepared by a registered engineer of the State of Florida and submitted to the department for approval. The department may, at its option, require copies of design calculations, borings or other soil investigations for his review prior to his approval. The design shall conform to accepted standards and applicable codes, and shall take into consideration a moving surcharge equal to that imposed by necessary canal maintenance equipment. Bulkheads shall be constructed of durable materials suited for the service and exposure. No wood bulkhead construction shall be permitted. The elevation of the top of the bulkhead shall be not less than one (1) foot above the control elevation of the waterway as established by the controlling governmental agency. A location, sketch showing the proposed construction shall accompany the application for permit. After a permit for construction is obtained, the building and engineering departments are to be notified twenty-four (24) hours before construction of any bulkhead or seawall is to begin. If, in the opinion of the building department, poor construction practices or inferior materials are being used in the bulkhead, the work may be stopped by the building department. The unsatisfactory portion thereof shall be removed at the expense of the builder and the work shall then be allowed to proceed.

(7)

Access boat ramps: Access boat ramps shall be provided to all lakes, creeks, canals, rivers or channels located within the city at locations and to the extent required by the department. Plans and specifications shall be approved by the department prior to construction.

(c)

Minimum elevations.

(1)

Minimum elevations for all improvement construction shall be those shown on the Flood Criteria Map of Broward County dated February 12, 1963, recorded in Miscellaneous Plat Book 2, Page 30 of the Public Records of Broward County, with such changes or revisions thereto which have been and may be made in the future but no elevation shall be lower than +7.5.

(2)

The minimum elevation may be less than listed above providing the scheme for drainage of the entire area under consideration is submitted to and approved by the department. If such drainage scheme requires pumps, they must be provided as part of the subdivision improvements.

(d)

Sidewalks.

(1)

Sidewalks of concrete construction shall be provided on both sides of all streets, both public and private, in the city and no certificate of occupancy shall be issued for a structure on a particular lot, tract or parcel unless the sidewalk adjacent to the particular lot, tract or parcel is in place.

(2)

In addition, the sidewalks shall be extended to the edge of the pavement and shall conform to the typical roadway section or as approved by the department.

(e)

Guardrails. Guardrails shall be provided at locations and to the extent required by the department. materials and installation shall conform to the requirements therefor as set forth in the current Specifications for Road and Bridge Construction of the Florida State Transportation Department and shall be approved by the department.

(f)

Headwalls. Headwalls for culverts shall be provided at the locations required by the department. Plans and specifications for headwalls shall be approved by the department.

(g)

Property line radii. Shall be not less than twenty-five (25) feet at street intersections.

(h)

Storm drainage.

(1)

General: The developer shall provide such facilities as may be needed to drain the subdivision to positive outlets that can be legally maintained in permanent use, or into a public drainage system of adequate capacity which discharges into such positive outlets, including all rights-of-way, easements and necessary construction at no expense to the city. Side ditches along public roads shall not necessarily be considered as such public drainage systems or positive outlets.

(2)

Storm drainage system: A complete storm drainage system shall be provided for draining the entire subdivision. The system shall also have capacity for handling runoff coming across or into the subdivision from the outside.

(3)

Storm drainage system design: The storm drainage system shall be designed by accepted engineering principles and in accordance with the following design criteria:

a.

Rational formula (Q = ciA)

b.

Coefficient of runoff (c) shall be 0.8 for paved and roof areas and 0.2 for grassed areas.

c.

The following storm drainage criteria shall be used as a minimum:

The minimum on-site retention volume shall be one-half (½) inch, and shall apply only to nonresidentially zoned properties.

d.

Manning's "n" shall be 0.013 for concrete pipe or fully paved corrugated metal pipe and 0.024 for corrugated metal pipe.

e.

The minimum roadway, swale or gutter gradient shall be 0.30 percent.

f.

The minimum transverse roadway slope shall meet Broward County standards.

(4)

Other design criteria:

a.

The department may permit other design criteria to be used or may require the developer to use criteria other than that given above when reasonably justifiable.

b.

The system shall be designed for the runoff that will occur after development of the subdivision and surrounding area is complete. The system shall be designed not to interfere with the operation of existing systems or conflict with the flow of water to or from adjacent property.

c.

A pervious material, suitably graded to permit infiltration from the swale surface to the water table shall be provided in all swale areas where gradients are not controlled by the use of concrete curbs or valley gutters.

d.

Inlets, headwalls, manholes and other drainage structures shall be of a design approved by the department. Generally, standard Florida State Department of Transportation structures will be satisfactory; however, the department may permit the use of other designs or require the use of their designs.

(5)

Storm drainage materials and construction: All storm drainage materials and construction shall be in accordance with the Florida State Department of Transportation "Standard Specifications for Road and Bridge Construction," latest edition.

(i)

Right-of-way requirements. All residential streets, both public and private, shall comply with the requirements as set forth in Figure IX-6.

(Ord. No. 402-97-E, § 1, 8-26-97; Ord. No. 402-07-C, § 10, 6-27-07)

Figure IX-1

Figure IX-2

Figure IX-3

Figure IX-4

Figure IX-5

Figure IX-6