Township Council Meeting — Packet

TA-2023 Washington Street Corridor Improvement Project Phase 2 Township of West Orange identify potential utility conflicts between existing utility facilities and proposed design elements such as new street light pole foundations. Prepare Preliminary Roadway Plans (3070): GPI will prepare the preliminary roadway plans at 1”=20’ scale. The plans will include the horizontal and vertical geometry of new replacement curbs, sidewalk and ADA curb ramps, driveway aprons, limit of disturbances, planting areas, signing, replacement pavement markings and streetscape improvements throughout the corridor. Roadway improvements are limited to pavement repair strips for new curb and potential drainage improvements. No other roadway improvements are anticipated. Prepare Preliminary Drainage Design (3085): GPI will delineate existing and proposed tree cover, lawn, and impervious surfaces for the purpose of identifying whether the project is a “major development” under the current NJDEP Stormwater Management Rules (SWM). It is assumed that the project will be designed to disturb less than one acre of land and will increase impervious surfacing and/or Motor Vehicle Surfacing (MVS) by less than ¼ acre. As such, it is assumed that the project will not be classified as a “major development” and will not have to comply with the NJDEP SWM rules. Where existing drainage structures conflict with proposed curb, sidewalk and/or ADA curb ramps, GPI will develop the drainage relocation design. Relocations are anticipated to be minor and will maintain the existing drainage system to the maximum extent practicable to limit SWM and permitting implications. No hydraulic analysis will be provided. We will also conduct a rainy-day survey to identify any existing ponding issues within the right-of-way or adjacent properties with a focus on identifying and correcting any low spots in the vicinity of curb ramps and crosswalks. Drainage work will be limited to minor corrections to gutter grades to avoid ponding in crosswalks. Upgrades to stormwater drainage systems is not anticipated. A cursory review of FEMA mapping reveals that a watercourse (North Branch Wigwam Brook) crosses the project area in the vicinity of the Liberty Street/Washington Street intersection. The watercourse is an open channel beyond the ROW and confined to a piped culvert within the public ROW of Washington Street and

a in the vicinity of the Liberty Street/Washington Street intersection. The watercourse is an open channel beyond the ROW and confined to a piped culvert within the public ROW of Washington Street and Liberty Street. There is potential for flood hazard area, riparian zones and wetland transition zones within the project area and may be within NJDEP jurisdiction. GPI will delineate the environmental constraints with available NJDEP GIS and FEMA data and provide a map for inclusion in the PE report. GPI will determine whether the proposed impacts will qualify for one or more NJDEP FHA Permits by Rule (PBR). To qualify for PBRs the project must not be a “major development” under the NJDEP SWM Rules. Assumptions: The following assumptions are related to Task 3085 1. The project is not anticipated to disturb more than one acre of land or increase impervious surface and/or Motor Vehicle Surfacing (MVS) by more than ¼ acre. As such, the project will not be classified as a “major development” and not subject to comply with the State NJAC 7:8 and municipal stormwater management rules. 2. Drainage design is limited to maintaining existing drainage patterns. Therefore, analysis of gutter spread and pipe capacity for existing conditions is excluded from this scope. 3. Hydraulic computations and a drainage design report will not be required. 4. Upgrades to existing drainage structures will consist of relocation for sidewalk and curb extension, replacing existing casting(s) with bicycle safe grates and meeting current NJDOT standards. 5. Permitting and regulatory compliance assessments will be based on the current NJDEP SWM Rules NJAC 7:8 (3/3/2020 adoption, 7/17/2023 operative date), NJDEP Flood Hazard Area Control Act and NJDEP Page 5 of 8