§ 6.1.9. Drainage systems.

(A)

The drainage system shall be designed and constructed for long life, low maintenance cost, and ease of maintenance.

(B)

An adequate drainage system including necessary open ditches, pipes, culverts, intersectional drains, inlets, bridges, and the like shall be provided for the proper drainage of all surface water. Cross drains shall be provided to accommodate all natural water flow and shall be of sufficient length to permit full width roadway and required slopes.

(C)

Developers of subdivisions whose storm drainage system discharges into the Lake Worth Drainage District shall contract with the Lake Worth Drainage District for maintenance of drainage facilities prior to annexation to the City.

(D)

Lots shall be laid out and graded to provide positive drainage away from all existing or proposed buildings.

(E)

The drainage system shall be designed using accepted engineering principles for rainstorms of maximum intensity based on a ten-year interval for the South Florida area. The system shall provide for drainage of lots, streets, roads, and other public areas as well as handling any run-off from adjacent areas that naturally flows into the subject area. Run-off coefficients shall be based on completed projects. The following standards shall apply to all drainage projects.

(1)

Storm sewers, culverts, and related installations shall be provided, where necessary, according to the City Engineer:

(a)

To permit unimpeded flow of natural water courses.

(b)

To insure adequate drainage of all low points along the line of streets.

(c)

To intercept storm water run-off along streets at intervals reasonably related to the extent and grade of the area drained.

(F)

In the design of storm sewerage installations, special consideration shall be given to avoidance of problems which may arise from concentration of storm water run-off over adjacent properties.

(G)

The subdivider may be required to carry away by pipe or open ditch any spring or surface water that may exist either previous to or as a result of the subdivision. Such drainage facilities shall be located in the street right-of-way where feasible, or in perpetual unobstructed easements of appropriate width.

(H)

A culvert or other drainage facility shall, in each case, be large enough to accommodate potential run-off from its entire upstream drainage area, whether inside or outside the subdivision. The City Engineer shall approve the design and size of the facility based on anticipated run-off from a ten-year storm under conditions of total potential development permitted by the zoning code in the watershed.

(I)

The subdivider's engineer shall also study the effect of such subdivision on the existing downstream drainage facilities outside the area of the subdivision; this study shall be reviewed by the City Engineer. Where it is anticipated that the additional run-off incident to the development of the subdivision will overload an existing downstream drainage facility during a ten-year storm, the subdivision shall not be approved until provision has been made for the improvement of the condition.

(J)

The owner or responsible entity of any land development or redevelopment that discharges directly or indirectly to a Municipal Separate Storm Sewer System is required to provide for annual inspections, and operation and maintenance of its stormwater management system, to ensure that the system functions as designed and permitted. [Amd. Ord. 2-01 1/16/01]