23 1345 008 PB 24 19 40 Eagle Ridge Way Engineering Review Revised 8 Jan 2025

23-1345-008 – PB24-19 (TheWayMaker LLC – 40 Eagle Ridge Road) Page 4 of 4 4.11 On page 70 of the Report the information on the drywell input into HydroCAD is not shown on the Plans or Survey. 4.12 On pages 70 and 74 of the Report the Engineer shall establish where the conductivity to groundwater elevations of 603.00 and 619.00 respectively come from. 4.13 On page 75 of the 4 Report the Engineer shall provide documentation from the manufacturer of the storage chambers that the storage volume is 45.9 cubic feet per chamber. 4.14 On page 281 of the Report there is a discrepancy with the areas as per comment 4.5 above. The Engineer must address this. 4.15 On page 285 of the Report the time of concentration calculations shall be provided by the Engineer and they need to be accounted for and shown in the drainage maps. See comment 4.6 above. 4.16 On Sheet 4 of 8 of the Plans inverts in and out of the various drainage components such as cleanouts, discharge pipes from chambers, control outlet structure and drywells shall be provided by the Engineer. 4.17 On Sheet 7 of 8 of the Plans the Engineer shall review elevations of structures and pipe sizes and inverts for consistency with the sheets that show the project in plan view. The Engineer shall provide a detail of a trash rack at the entry point of the outlet structure and also provide a top elevation of the grate. Landscaping Plan 5.1 Matrix has no comment on the landscaping plan. 5. Soil Erosion & Sediment Control 5.1. The Applicant shall obtain a soil erosion and sediment control permit from the Hudson-Essex-Passaic Soil Conservation District. Matrix reserves the right to review the certification and approved plans from the district. We thank you for the opportunity to be of service to the Township of West Orange Planning Board. Please feel free to contact me directly with any questions or comments at (973) 295-3279 or via e-mail at pscott@mnwe.com. Sincerely, MATRIX NEW WORLD ENGINEERING Phillip Scott, P.E., C.M.E. Director of Urban Engineering and Development LL:PS Enclosures Cc: Dennis Petrocelli, PG – Vice President, Matrix F:\2023\23-1345 West Orange 2024 Municipal Engineering Services\008 - PB-24-19, TheWayMaker LLC - 40 Eagle Ridge Way\Correspondence\Letters\23-1345-008 - PB-24-19 - 40 Eagle Ridge Way - Engineering Review.docx