§ 200-85. Other water, sewerage and drainage improvements.

In cases where the need for any off-tract water, sewerage or drainage improvement is necessitated by the proposed development application and where it is determined that properties outside of the development will also be benefited by the improvement, the following criteria shall be utilized in determining the proportionate share of such improvements to the developer.

A. 

Sanitary sewers. Distribution facilities, including the installation, relocation or replacement of collector, trunk and interceptor sewers, and the installation, relocation or replacement of other appurtenances associated therewith. The applicant's proportionate share shall be computed as follows:

(1) 

The capacity and the design of the sanitary sewer system shall be based on all applicable New Jersey Department of Environmental Protection regulations and all West Windsor Township Sewer Design Standards, including infiltration standards, and all other Township stormwater drainage standards.

(2) 

The capacity of the existing system to service the entire improved drainage area shall be computed as follows:

(a) 

If the system is able to carry the total developed drainage basin, no improvement or enlargement cost will be assigned to the developer.

(b) 

If the existing system does not have adequate capacity for the total developed drainage basin, the prorated enlargement or improvement share shall be computed as follows:

	Total enlargement or improved cost	=	Total tributary gpd
	Developer's cost		Development gpd

(c) 

If it is necessary to construct a new system in order to service the proposed development, the prorated enlargement share to the developer shall be computed as follows:

	Total project cost	=	Total tributary gpd to new system
	Developer's cost		Development tributary gpd

(3) 

The plans for the improved system or extended system shall be prepared by the developer's engineer. All work shall be calculated by the developer and subject to the approval of the Township Engineer.

B. 

Drainage improvements. For stormwater and drainage improvements, including the installation, relocation or replacement of storm drains, culverts, catch basins, manholes, rip-rap or improved drainage ditches and appurtenances thereto and relocation or replacement of other storm drainage facilities or appurtenances associated therewith, the applicant's proportionate share shall be determined as follows:

(1) 

The capacity and the design of the drainage system to accommodate stormwater runoff shall be based on a method described in Urban Hydrology for Small Watershed Technical Release 55, Soil Conservation Service USDA, January 1975, as amended, or a successor method, computed by the developer's engineer and subject to the approval of the Township Engineer.

(2) 

The capacity of the enlarged, extended or improved system required for the subdivision or site plan and areas outside of the developer's tributary to the drainage system shall be determined by the developer's engineer, subject to approval of the Township Engineer. The plans for the improved system shall be prepared by the developer's engineer and the estimated cost of the enlarged system calculated by the Township Engineer. The prorated share for the proposed improvement shall be computed as follows:

	Total enlargement or improvement cost of drainage facilities	=	Total tributary cfs
	Developer's cost		Development cfs

Amended 8-9-1982 by Ord. No. 82-36; 9-24-1984 by Ord. No. 84-29; 7-22-1996 by Ord. No. 96-13