§ 276-29. Drainage.

All streets shall be provided with manholes, catch basins and pipes where the same may be necessary for proper drainage.

A. 

The system shall be adequate to carry off the stormwater and natural drainage water which originates within the lot or tract boundaries. No stormwater runoff or natural drainage water shall be so diverted as to overload existing drainage systems to create flooding or the need for additional drainage structures on other private properties or public lands without proper and approved provisions being made for taking care of these conditions.

B. 

Techniques for computing water runoff shall be as prescribed by the City Engineer.

C. 

Bridges and culverts shall be designed for 100-year storm minimum flow capacities.

D. 

All materials used in the construction of storm sewers, bridges and other drainage structures shall be in accordance with the specifications of the Standard Specifications for Road and Bridge Construction, 1983, as prepared by the New Jersey Department of Transportation, and any supplements, addenda and modifications thereto unless otherwise specified by the City Engineer.

E. 

Pipe sizes shall be determined by acceptable drainage design procedures, provided that the pipe size in a surface water drainage system shall in no instance be less than 15 inches in diameter. Moreover, underground pipes ordinarily shall be perforated in order to recharge the drained water into the ground. All piping and the manner installed shall be subject to approval by the City Engineer.

F. 

Stormwater may be required to be detained or retained on site in a manner and at a quantity as required by the City Engineer.

G. 

Drainage inlets shall be located at all intersections, with inlets on both sides of a street at intervals of not more than 400 feet or such shorter distances as required to prevent the flow of surface water from exceeding six cubic feet per second at the drainage inlet. Access manholes shall be placed at maximum 500-foot intervals throughout the system and at pipe junctions where there are no drainage inlets.

H. 

Lots shall be graded away from the building(s). Additionally, drainage shall be provided in a manner which will prevent the collection of stormwater in pools or other unauthorized concentrations of flow, and water shall not flow across adjacent property lines at greater than predevelopment rates.

I. 

Approval of drainage structures shall be obtained from the appropriate municipal, county, state and federal agencies and offices. Where required, each applicant shall make application to the Division of Water Resources of the State Department Of Environmental Protection And Energy, the Cape May County Engineering Department and the City Engineer. Final approval shall not be effective until letters of approval from the proper governmental authorities shall be furnished to the Secretary of the Planning Board, with a copy of each letter forwarded to the City Engineer.

J. 

When required by the municipality and as indicated on an approved development plan, a drainage right-of-way easement shall be provided to the City where a tract or lot is traversed by a watercourse, surface or underground drainageway or drainage system, channel or stream. The drainage right-of-way easement shall conform substantially with the lines of such watercourse and, in any event, shall meet any minimum widths and locations as shown on any adopted Official Map on Master Plan. Such easement shall be expressed on the plat as follows: "Drainage easement granted for the purposes provided and expressed in the Land Development Ordinance of the City of North Wildwood."