263-22 Proposal - SCE.pdf

SCE-P13155.011 August 22, 2022 provide the Township with added value without adding cost to the project. Outfall inspections that are completed as part of this phase will satisfy the MS4 requirement to complete an outfall inspection every five (5) years. We will review the Township's 2009 outfall pipe mapping, as-built drawings, and meet with Township staff that are most familiar with the Township's outfalls to create a comprehensive list of known and potential outfall locations. Our field team will travel fo each of the known and potential outfall locations to perform the GNSS mapping and outfall inspection. Additional outfalls that are located in the field will also be mapped and inspected. Outfall inspections will be performed during dry-flow conditions, which is at least 72-hours after the previous precipitation or snowmelt event. The following outfall information, when present in the field, will be collected and stored as attributes within the GIS data. These attributes align with the NJDEP’s recommendations for inventorying stormwater outfalls. This information will be in addition to the inspection results: Outfall ID Owner — Township, County, State, Private, etc. Pipe Material Pipe Shape Headwalll Structure = BMP Structure = Contributing Drainage Area = Type of Area Receiving Esri's stormwater conveyance data model will be used as a starting point and modified to incorporate NJDEP standards for stormwater inventorying. GIS data will utilize the New Jersey State Plane Coordinate System (NJ SPCS) derived from the North American Datum of 1983 (NAD83). A minimum of one (1) close-up photograph of each catch basin will be captured in the field, included in the final inspection report, and connected to that asset within the GIS. Once the outfall mapping and inspections in the field are completed, our team will prepare a storm sewer outfall pipe map and GIS data deliverable to be submitted to the NJDEP. The outfall location map will show the location of the end of all MS4 outfall pipes that are operated by the Township, and the location of all surface water bodies receiving discharge from those outfall pipes. Each outfall will be given a unique alphanumeric identifier and labelled on the map. SCE can either submit the outfall location data to the NJDEP on behalf of the Township or submit the outfall GIS data to the Township for future submittal to

umeric identifier and labelled on the map. SCE can either submit the outfall location data to the NJDEP on behalf of the Township or submit the outfall GIS data to the Township for future submittal to the NJDEP.