263-22 Proposal - SCE.pdf

SCE-P13155.011 August 22, 2022 equipment paired with the Field Maps mobile application will be used to collect the location of each catch basin. Our team will review the Township's existing as-built drawings to gain a general understanding of the location of stormwater catch basins prior to commencing the field work. Our general approach to the field data collection will be to travel the rights- of-way of each street and municipal easement where we anticipate stormwater catch basins to be located, based on our review of Township's existing as-built drawings. Our GNSS equipment will be connected to a real-time kinematic (RTK) network which will improve the accuracy of GNSS measurements in real-time. Centimeter grade GNSS equipment will typically capture horizontal locations that are accurate to within GPS vs. GNSS: What is the Difference? GPS stands for Global Positioning System and refers to the satellite constellation which is owned and maintained by the United States Department of Defense. GPS consists of 24 operating satellites and is a type of GNSS. GNSS stands for Global Navigation Satellite System which describes a constellation of satellites that provide positioning and timing data from space to GNSS receivers on earth. GNSS includes GPS (USA), GLONASS (Russia), Galileo (EU), Bei- dou (China), and more. GNSS includes more than 108 individual satellites. Access to this many satellites results in higher accuracy data collected more quickly. a few inches of the actual location of the asset being collected, in optimal conditions. Vertical accuracy is typically two (2) to three (3) times the horizontal accuracy at each location. Location data collected for this project will meet or exceed the requirements of the NJDEP GPS Data collection Standards for GIS Data Development. Once the catch basin location has been mapped, our team will inspect the catch basin to identify and document any suggested cleaning, clearing, or repair work. Our catch basin inspections will include both the grate opening and the catch basin structure, including the sump and any inlet and outlet pipe(s). We will document any observations about the condition of the catch basin structure including the frame and grate, water quality, and surrounding ground surface using a standard digital inspection form. Our catch basin inspection form will be provided to the Township for review

ture including the frame and grate, water quality, and surrounding ground surface using a standard digital inspection form. Our catch basin inspection form will be provided to the Township for review and comment, prior to the start of the field work. Revisions or additions that are mutually agreed upon by the Township and SCE will be incorporated into the inspection form prior to the start of the field work. The NJDEP’s Municipal Stormwater Mapping and Inventory guidance will be used when collecting information about each catch basin. The following information, when present in the field about each catch basin, will be collected and stored as attributes within the GIS data. This information will be in addition to the inspection results: * Catch Basin ID = Owner - Township, County, State, Private, etc. = Catch Basin Type — Curb cut, grate inlet, etc.