Drainage Report. 1. DRAINAGE ELEMENTS The Engineer shall perform field work and analysis necessary to design the drainage elements for designated locations and sections of roadways. The Engineer shall:
a. Perform field work and analysis necessary to design the drainage elements for at the designated location.
b. Provide relevant sheets for inclusion within the PS&E package.
c. Provide electronic files of the design and PS&E Package.
Drainage Report. 1. The Engineer shall prepare a single comprehensive drainage study and report of the project area. The report shall be divided into two (2) phases:
a. Obtain existing HEC-2 or HEC-RAS models from applicable drainage authorities to the extent possible, for use in analysis and determination of the existing 2, 5, 10, 25, 50, 100 and 500 year (if available), water surface elevations at bayous, creeks, and ditch crossings along the project. This data will be utilized in the development of design roadway profiles.
b. Profile of natural ground along each proposed grade line of the roadway.
c. Profile of tentative proposed grade line of the roadway.
d. Profile of existing roadway.
e. Identify the existing drainage outfalls.
f. Identify the names of existing creeks, bayous and ditches within the project limits.
2. These profiles shall be superimposed on a drawing along with the 2, 5, 10, 25, 50, 100 and 500 year (if available) water surface elevations. The profile drawing will provide an overall view of the roadway/existing ground elevations with respect to the various storm design frequencies for the length of the project. This will enable the State to determine the most feasible proposed roadway profile. These profiles must be submitted to the State and approved before continuing with the preparation of the comprehensive drainage report. NOTE: THE ENGINEER SHALL COORDINATE WITH ALL GOVERNMENT AGENCIES THROUGH THE STATE’S DISTRICT OFFICE.
a. Manhole head losses shall be computed as per the State’s direction. Also, THYSYS (WINSTORM) computations are not needed for hydraulic grade line investigations. The head losses shall be computed with a pressure flow equation generally applicable to pipe running full flow. A hydraulic grade line starting at the outfall channel will be determined for each storm sewer system in order to obtain a design tailwater for each existing system. The design tailwater shall be the starting basis for the design of the proposed storm sewer system.
b. For drainage areas, the Engineer shall limit the outfalls into existing storm sewer to existing capacity flows, which will be determined by the Engineer. Alternate flow routes, if feasible, shall be looked into for relieving storm sewer overload. The amount of the total detention storage to control storm sewer runoff for the design frequency shall be determined based on hydrograph routing, as well as a rough estimate of the available on-site volume.
c. Drainage areas and flows for cross culvert...
Drainage Report. The scope for work for this Drainage Mitigation Study is to support additional roadway development. • Drainage Mitigation Study The purpose of this task is to prepare a Drainage Mitigation Study to determine the 100-year storm impacts resulting from construction of the project and to develop and analyze alternatives to mitigate these impacts. The following tasks describe the work to be performed: Prepare 100-year storm drainage area maps for existing and proposed conditions, which include the typical Fort Bend County roadway improvements within the project limits and the proposed right of way (ROW). Compute existing and proposed peak flows based on the Fort Bend County methodology within the existing and proposed ROW. Compute required 100-year storage volumes within the ROW to determine mitigation requirements for the proposed condition. Prepare existing and proposed hydrographs at each outfall location to develop mitigation alternatives to implement the required 100-year mitigation. Prepare a Drainage Mitigation Preliminary Engineering Report to summarize and document the findings of this study. The report will include the following items at a minimum: Provide electronic draft copies of the report for PMT review and upon approval.
Drainage Report. A drainage report is required if the Grade Separation Project necessitates changes in existing drainage patterns or increases in drainage flow on Railroad right-of-way. See Section 4.5.2 and 4.5.3 for hydraulic criteria to be used.
Drainage Report. The Engineer shall provide the following services: The Engineer shall prepare a single comprehensive drainage report of the project area, signed, sealed, and dated by a registered or licensed engineer. The drainage report must include applicable hydrologic and hydraulic models such as HY-8, ORD-DU, HEC-RAS, HEC-HMS, EPA-SWMM, and other applicable modeling tools. This modeling must evaluate existing versus proposed conditions. This shall include a draft report and a final report which addresses comments provided by the State. The drainage report shall include, at a minimum, the following sections: • Introduction: location, study objectives, general creek and watershed information, and other pertinent facts. • Hydrology: watershed description, soil and land use information, south of hydrologic data and methodology or models used to develop flow data, pertinent input data and parameters of hydrologic analyses, summary table of results for a full range of peak discharges. • Hydraulics: overview of hydraulic modeling process, including data sources, specific model used, description of existing structures, drainage system characteristics, and other pertinent facts such as the sources of models; discussion of design alternatives and the results of respective hydraulic modeling for the scenarios evaluated; hydraulic model output data for existing and proposed conditions. • Summary of Conclusions / Recommendations: summary of study objectives, alternatives considered, analysis findings, and recommended solutions. • Exhibits: including at a minimum, location map, topography map, drainage area map, land-use map, EPA-SWMM exhibits with node and link diagram, and FEMA FIRM. • Appendices: meeting minutes, detailed hydrologic calculations, models, model output files, photographs, and other pertinent information. • PDF of full report and exhibits and all appendices (including hydrologic and hydraulic models). interim, and final signing strategies and placement of signs outside contract limits. The Engineer shall: • Prepare sign detail sheets for large guide signs showing dimensions, lettering, shields, borders, corner radii, etc., and shall provide a summary of large and small signs to be removed, relocated, or replaced. • Designate the xxxxxxx to be attached to guide signs. • Illustrate and number the proposed signs on plan sheets. • Select each sign foundation from TxDOT Standards.
Drainage Report. 5 Developer shall prepare a preliminary Drainage Report(s) for the Project drainage system(s) in 6 accordance with Chapter 4 of the ADOT Highway Drainage Design Manual – Hydraulics and 7 shall include all calculations and analysis in the report as required by the Contract Documents. 8 Developer may prepare the preliminary Drainage Report(s) per drainage system, Project 9 Segment, or for the entire Project. 10 At the same time as Initial Design Submittal for the associated drainage improvements, 11 Developer shall submit a preliminary Drainage Report to ADOT for review and comment.
Drainage Report. Metes and Bounds modification to all parcels, except Parcel 1 (Part 1 & Part 2). Sincerely, Xxxxx-Xxxxxxx, Inc. Xxxxxxxx Xxxxx M Xxxxxx, XX Xxxxxxxxx Xxxxxxx, PE ENV SP Project Manager Managing Principal PROJECT BUDGET WORKSHEET - Houston 2022 Client: Project Name: Contract No.: Project No.: Fort Bend County / LJA Xxxxx Road and SH 99 Date: Project Number: Project Template:
Drainage Report. A Drainage Report will be completed for this project in accordance with City of Tempe standards, based on our preliminary engineering design. The results of this report will be incorporated in the final grading and drainage design. Storm water facilities and storm drain systems will be sized to collect, convey, and retain storm water generated onsite. Offsite or regional drainage issues are not anticipated for this project.
Drainage Report. Prepare drainage report for the project improvements that meets City requirements. Submit in draft and final format.
Drainage Report. The drainage report, signed and sealed by a professional engineer, shall include applicable hydrologic and hydraulic models such as HEC-RAS, HEC-HMS, and other applicable models. The Engineer shall prepare a Final Drainage Study in accordance with the State’s Hydraulic Design Manual, District criteria, and any specific guidance provided. A CLOMR or LOMR Request to FEMA is not included as part of this scope. Additional requirements (models, calculations, reports, data, and review fees) required by local agencies are not included in this scope of work. Any environmental permit requirement is not included in this scope of work. The final Culvert Hydraulic Data Sheets, Preliminary Culvert Layouts (plan view only), Preliminary Bridge Class Culvert Layouts (plan and profile) must be included in the drainage report.
