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​ ​Introduction and Major Stormwater Justification​​(continued)​ I​n addition to the utilization of two green infrastructure BMPs low impact development measures​ ​are implemented throughout the unstudied portion of the site (not experiencing placement of​ ​impervious cover and maintaining existing lawn surfaces) which will serve to lessen the overall​ ​stormwater runoff from the site. These measures include; preservation of large trees, lessening​ ​of slopes and increasing drainage paths to increase time of concentration. These items are​ ​shown on the Land Use Planning and Source Control Plan within the site plan set.​ ​Property Description​ ​ he project site is an existing flag lot with a stem portion containing the driveway which fronts on​ T ​Ridgeway Avenue The 1.219 acre property was previously developed with a single family​ ​dwelling with attached garage, covered parking or storage area, retaining walls, bocci court and​ ​koi pond. The property is located within an existing residential neighborhood. The existing home​ ​is served by public utilities which are located within the bed of Ridgeway Avenue.​ ​ rainage from a small portion of the property (approximately 3,000 sf) flows overland from a​ D ​highpoint on the driveway stem towards Ridgeway Avenue. The remainder of the site drains​ ​overland from South to the North towards the rear of Lot 21.01 at which point runoff from the site​ ​is collected by an existing inlet and piped through Lot 21.01 to the Township storm sewer​ ​system. No existing stormwater management facilities were found on the site.​ ​ here are no protected steep slopes on the site; slopes on the property are predominantly​ T ​between 1.5% and 8%.​ ​ he soils on the site are silt loam to loamy sand noted as BouB Boonton Urban Land

here are no protected steep slopes on the site; slopes on the property are predominantly​ T ​between 1.5% and 8%.​ ​ he soils on the site are silt loam to loamy sand noted as BouB Boonton Urban Land within​ T ​hydrologic soil type “C”, with a seasonal water table depth exceeding 80” in depth and a​ ​moderately low to moderately high infiltration rate of the most restrictive soil layer of 0.06 to 0.20​ ​in/hr (USDA NRCS Soil Survey).​ ​3​ ​Mailing Address: Post Office Box 4304, Warren, NJ 07059​