Hydrology and Hydraulics. Complete a hydrologic and hydraulic analysis of the existing and proposed system. Describe the methodologies used and in the analysis and explain the basis of the selected approach.
Hydrology and Hydraulics. FEMA Regulated Crossings All FEMA regulated streams will be modeled for the preferred alternative only. Existing basin conditions are the normal design criteria used by TxDOT. The use of ultimate basin conditions on this project shall be considered on a case by case basis, and after an assessment performed by TxDOT and the Mobility Authority. Therefore, coordination with the Mobility Authority and the DHE shall be required if the ENGINEER deems necessary to use ultimate basin conditions.
Hydrology and Hydraulics. EXHIBIT “A-1” Scope of Services The deliverable is one final hydrology and hydraulic report for the drainage area properly sizing all catch basins, storm drain main, laterals, and above ground channel. All calculations will be performed per SBCFCD Standards. Calculations will be provided to support the sizing of the outlet structure at Xxxxx Lakes, including analyses for energy dissipation measures, and 85th percentile and 2-year storm event for the improved drop inlet structure. A historical flow hydrology analysis will be performed to identify the hydrologic impacts of the different options to be evaluated under Task 2. This analysis will evaluate what stormwater runoff has historically discharged to the OCFCD property on the south side of Pine Avenue. This will be important in evaluating the alternatives in Task 2. Submittals will take place at 30%, 65%, 95% (interim) and 100% stages as a report binder including the report, calculations, and drainage map as well as a digital PDF copy. Deliverable(s): One final hydrology and hydraulics report in hardcopy and digital format (30%, 65%, 100%) Task 2 – Feasibility Study Q3 will prepare one feasibility study memorandum for the 5 options described in the Approach section. Q3 will prepare a conceptual layout plan of each option, including layout and typical cross-sections with standard details and standard specifications. Existing utilities will be shown per the responses from the first utility notification letters. Facility Map Request (FMR) letter to all utility owners identified as potentially impacted by the proposed project improvements and utilize the collected facility maps and/or ‘as-built’ plans to develop the preliminary Utility Map. Preliminary research shows a minimum of eleven utility owners with facilities potentially within the project limits: Utility Owner Facility Type 1 City of Chino Potable Water/ Sanitary Sewer 2 City of Ontario Potable Water/ Sanitary Sewer 3 Jurupa Community Services (JCS) Potable Water/ Sanitary Sewer 4 Inland Empire Utilities Agency (IEUA) Reclaimed/ Recycled Water Trunlines 5 Santa Xxx Watershed Project Authority (SAWPA) HP Brineline/ Trunklines 6 Crown Castle (CC) OH & UG Communication Lines 7 Charter/ Spectrum (CHTR) OH & UG Communication Lines
Hydrology and Hydraulics. Existing hydrologic modeling efforts developed by JEO will be reviewed and utilized to assess performance characteristics of existing conditions and proposed detention cells for up to the 50-year design storm event. New hydraulic models will be developed utilizing HEC-RAS (1D, steady-state) to evaluate proposed channels and culvert crossings.
Hydrology and Hydraulics. Non-FEMA Regulated Crossings
Hydrology and Hydraulics. Non-FEMA Regulated Crossings It is anticipated there will be up to 15 Non-FEMA crossings within the project limits. The ENGINEER will obtain and fully utilize all available data including past drainage plans and reports. This data will serve as the baseline for the cross-drainage modeling effort and will be utilized as much as possible.
Hydrology and Hydraulics. The GEC shall coordinate with Travis County to develop a drainage design criteria summary for the project. • Drainage Impact Study- The GEC shall prepare a Drainage Impact Study for the Project which includes: o Data Collection o Existing Conditions Hydrologic and Hydraulic Modeling o Proposed Conditions Hydrologic and Hydraulic Modeling o Mitigation Alternatives o Impact Study • Roadway Drainage o Develop External Drainage Area Maps o Prepare Detention Pond Layouts o Prepare Detention Pond Details • Bridge and Culvert Plan Sheets
Hydrology and Hydraulics. The proposed hydrology and hydraulic studies shall be performed in accordance with the Cities of Rancho Cucamonga, Ontario, Montclair, and Pomona, San Xxxxxxxxxx Xxxxx control Design Criteria, US Army Corps of Engineers, and FEMA.
Hydrology and Hydraulics. This task is for the determination of the project’s adequacy in conveying the design storms in accordance with Chapter 11 of the Local Assistance Procedures Manual and Memo to Designers 1-23. For the Xxxxxxxx Creek Bridge Replacement on Xxxxxxx Xxxx Project (Project), WRECO will be responsible for the Preliminary Hydraulic Report and the Final Hydraulic Report. WRECO will attend the kickoff meeting and participate in four (4) conference calls with Mendocino County (County) and the Project Team staff. On a monthly basis, WRECO will provide the Project Team with invoices and progress reports for the Project. WRECO will conduct a field investigation to better understand the related hydraulic design issues. Task 6.0 Floodplains - WRECO will perform floodplain analyses with Appendix A (Caltrans Location Hydraulics Study Form) and Appendix B (Summary Floodplain Encroachment Form). The County will provide a version of this form that is compatible with the data document discussed under Task 1 and is approved by Caltrans District 1. Floodplain studies required in LAPM Exhibit 6-A, Section B (Required Technical Studies and Analyses) are to be coordinated with Task 6 in an effort to minimize duplication of studies. Analyses are to be completed in accordance with the Caltrans SER, Volume 1, Chapter 17. These include descriptions of project alternatives to specifically address 23 CFR 650A, Section 650.111 (b)(c)(d), as well as requirements found in Chapter 804 of the Highway Design Manual. Where preliminary studies lead to a Floodplain Evaluation Report, the County will issue a contract amendment.
