Text · page 127 of 301
Read the whole document on one page (all 301 pages, each with its own heading)
Where required for design, we will work with subconsultant partners to perform topographic surveys and research existing easements where required. GHD will also work with our subconsultant partners to conduct soil borings and environmental reviews. 2.1.4 Water Modeling Models are essential for planning system upgrades, evaluating existing conditions, and developing a holistic understanding of complex systems. GHD’s staff are globally recognized experts on sanitary sewer, water distribution, flood/stormwater, and complex hydraulics modeling. GHD has maintained a sanitary sewer model for the Town of West Seneca since 2010 and it has been used to plan and design projects like the Plant 5 Flowmetering Upgrades, and a genetic algorithm analysis in the SSES Re-Evaluation, which was used to develop Phase 8.5 of the Town’s SSES. Modeling projects generally begin with a comprehensive program of flow, precipitation and/or pressure data collection followed by review, and validation. GHD can support the Town with determining sensor locations. GHD has extensive experience with manhole inspections to determine suitability for flow metering and has incorporated digitization of manhole inspections and related geospatial data using Survey123. This program allows the inspector to capture manhole attributes and confirm locations quickly and with a standardized format for easy processing and summarization. These forms may be used while inspecting selected manholes, and documenting location, condition, and suitability for meter installation. If desired, a copy of the Survey123 form can be provided to the Town so that O&M personnel can perform an initial inspection using tablets and ESRI server with support from GHD when needed. Collected data is validated using tools developed by GHD’s digital solutions staff, who have been pushing the boundaries of data analytics and automation. They have created tools that allow for advanced statistical/predictive analysis of large datasets with approximately 75 percent less effort than what would be done manually. Combining the expertise of GHD’s digital statisticians and data scientists with our engineers allows for projects to be delivered more efficiently and more accurately than in the past. They use technologies such as Machine Learning/Artificial Intelligence guided by domain experts to develop highly sophisticated algorithms that can assist utilities with their daily and strategic operations while solving several business problems. Once data has been validated and accepted as representative of a site, it is used for model calibration and validation. Potential models that can be used include but are not limited to Infoworks ICM 1D-2D models for stormwater, antecedent moisture models for inflow and infiltration, extended simulation models for drinking water planning, and HAMMER transient modeling to mitigate operational risk to pump stations. These models can be used to plan system upgrades and predict capacity needs in response to future growth. 2.1.5 Detailed Design GHD will prepare designs for proposed projects based on design standards and guidelines for water and sewer facilities. The goal of the detailed design phase is to prepare bid documents for the projects, generally consisting of: – General conditions – Supplementary conditions – Special provisions – Technical specifications – Contract drawings (plans) – We will incorporate any standard details and specifications into our design as applicable GHD will review designs for conformance with applicable building code requirements, codes, and regulations. In addition, we will review design for conformance with the Recommended Standards such as the Ten State Standards, AWWA, and other applicable industry standards. Following each design submittal, a meeting or workshop (in-person or virtual) will be held with Town staff and other stakeholders (as necessary) to review the draft design documents and solicit comments from all team members. We will track comments obtained in the workshop or in writing for verification that the comments have been addressed. GHD | Town of West Seneca | 12681649 | Engineering Services for Water and Wastewater Projects 4 Page 127 of 301