Report 4 13 2026

​ENSURPLAN, INC.​ ​ ww.Ensurplan.​​net​ w ​ ivil Engineers & Land Surveyors C Ph: (732) 469-0400​ ​Certificate of Authorization 24GA27997700​ ​STORMWATER DRAINAGE REPORT​ ​04/13/26​ ​Minor Subdivision 15 Ridgeway Ave West Orange, NJ​ ​Property Description​ ​(continued)​ ​ n site soils testing revealed a depth to seasonal high water varying from 5’ to 7.5’ with an​ O ​infiltration rate varying from 0.32”/hr to 1.00”/hr. Testing was done towards the four corners of​ ​the site. Only the southwest portion of the site yielded permeability rates great enough to​ ​support an infiltration system.​ ​ he vegetation on the site is predominantly well established lawn, with a number of large​ T ​deciduous trees located predominantly along the exterior boundary of the site with a lesser​ ​concentration within the site interior.​ ​ review of the NJ Geoweb site along with a site inspection by the engineer did not reveal any​ A ​indications of wetlands, waterways or presence of protected species which might impact the​ ​development of the site.​ ​Project Scope and Stormwater Management System Overview​ I​t is proposed to subdivide the property into two lots. One lot will contain the existing home to​ ​the northeast of the site and a new home will be constructed on the second lot. Both lots will​ ​share a driveway access centered on the stem portions of the lots accessing Ridgeway Avenue.​ ​ tility services for the homes shall be provided through the stem portions of the lot connecting to​ U ​the mains on Ridgeway Ave.​ ​ enovations and reconfiguration of the existing home was undertaken pursuant to an approved​ R ​zoning permit. During the course of demolition the builder removed a significant portion of the​ ​existing dwelling leaving only the garage as a standing structure. Therefore from a stormwater​ ​modeling perspective the project shall be now considered the construction of two new homes.​ ​ shared stormwater management system shall be constructed on the two lots. All proposed​ A ​vehicle surfaces shall be

spective the project shall be now considered the construction of two new homes.​ ​ shared stormwater management system shall be constructed on the two lots. All proposed​ A ​vehicle surfaces shall be constructed with permeable pavement. The driveway surfaces shall be​ ​underlain with a stone bed and an interconnecting perforated pipe system, both of which will​ ​collect runoff from the driveway and direct it towards a proposed basin at the southwest corner​ ​of the site. Runoff from all roof surfaces which will receive pre-treatment through the use of a​ ​gutter screening system, will also be directed directly to the proposed basin or into the stone​ ​bed below the driveway surface.​ ​4​ ​Mailing Address: Post Office Box 4304, Warren, NJ 07059​