Hydraulic Engineering. Computer programs used for hydraulic modeling, such as HEC-RAS, or WSPG shall be compatible with County and/or District 's computer equipment, and A-E shall receive DIRECTOR approval of any program before it is used. A-E as required, will perform preliminary and/or design level hydraulic analyses of flood control facilities and local drainage systems using, but not limited to, HEC-RAS, WSPG, FLO-2D, RiverFLO- requested may include, but shall not be limited to, existing deficiency and capacity studies, development of design water surface elevations, development of preliminary and ultimate facility design alternatives, sedimentation engineering, construction phasing schedules, and preparation of PS&E. Hydraulic controls for tributary channels and County and/or District committed water surface elevations (if not requested as part of A- be provided where available. Available reports and preliminary engineering studies performed by County and/or District will be provided to A-E. Geotechnical, survey, environmental, utility, and record drawing information (if not part of A- County and/or District. The work to be performed by A-E may include, but is not limited to the following:
1. Hydraulic analysis and generation of hydraulic grade lines (HGL) for existing and future condition design alternatives. Preparation of exhibits indicating the HGL on plans, and profile sheets for existing and future condition alternatives to be presented in report(s).
2. Hydraulic analyses for conveyance of design discharges through existing bridge and culvert structures, including street, freeway and railroad crossings.
3. Sedimentation analyses for natural streams or earthen channels, including, but not limited to, the determination of sediment delivery/load, bed and bank scour (general and local), erosion and deposition (degradation/aggradation), channel/stream stability, horizontal migration and bed and bank erosion protection requirements. Sedimentation analyses may require utilizing software such as FLUVIAL-12, HEC-6 or other software widely accepted and recommended by the professional engineering community. Sedimentation analyses may also include historical research and development and calibration of a historical model in order to determine future stream behavior.
4. Identification of local drainage facilities and catch basins, including a listing of major inlets and committed water surface elevations.
5. Determination of capacities of local drainage facilities.
6. Identificatio...
Hydraulic Engineering. The Engineer shall identify and determine the location, size, and material type of each major drainage structure in the project area (a major structure is defined to be a 24” diameter or larger pipe or equivalent drainage structure, or open channel conveying more than 100 CFS during a 100-year event). The Engineer shall determine existing and available capacity of each major drainage structure and use modeling methods, calculations, and analysis that is compatible with applicable criteria. TRACKWORK DELIVERABLES WILL INCLUDE THE FOLLOWING: • Typical sections • Track alignment plans to continue the horizontal and vertical alignment to include points of connection to existing systems or points of connection for proposed systems • Track chart (track chart with mathematized horizontal and vertical alignments) • Key map • Plan and profile – horizontal scale 1-inch equals 40 feet and vertical scale 1-inch equals 4 feet • Cross-sections 100’ apart - horizontal scale 1 inch equals 10’ and vertical scale 1 inch equals 10’ • Right of way information will be superimposed on all the trackwork layouts • Staging plan with minimum interruption to service • Special trackwork details • Specifications outline • Unit price cost estimate Particular attention on trackwork design will be given to proximity to sensitive land uses (both the depot building and train deck are listed on the National Registry of Historic Buildings/Places), areas of restricted rights-of-way (i.e. Xxxxx Xxxxx Nature Sanctuary), areas affected by flooding, and critical clearances with physical constraints. The Track Engineer will complete a thorough walking inspection of the project right-of-way. Existing track condition will be documented, including rail sections and condition, tie and roadbed condition, special trackwork arrangements, critical signal and joint locations, clearance constraints, and drainage and civil concerns. The track design team will undertake a review all relevant existing project documentation with respect to the field inspection findings to determine the topographic survey requirements and coordinate with the survey team. All horizontal alignment information will include radius of curve, length of curve, length of spiral stationing, super elevation and speed constraints. The vertical alignment for the control track will include existing ground, proposed grade, vertical curve information, clearances to existing and proposed overhead structures, and speed constraints. The Engineer ...
