Culvert and Storm Drain Design Sample Clauses

Culvert and Storm Drain Design. The Engineer shall develop design details that minimize the interference with the passage of traffic or incur damage to the highway and local property. The Engineer shall provide layouts, drainage area maps, and design of all drainage components. The Engineer shall design all conventional storm drainage and cross drainage in conformance with the latest edition of State Hydraulic Manual, State Districts’ criteria, and any specific guidance provided by the State. Storm drain design shall be performed using WinStorm or GEOPAK Drainage. Cross drainage design shall be performed using WINSTORM, HY 8 or HEC RAS. When oversized storm drains are used for detention, the Engineer shall evaluate the hydraulic gradeline throughout the whole system, within project limits, for the design frequency(ies). The Engineer shall coordinate with the State any proposed changes to the detention systems. The State will assess the effects of such changes on the comprehensive drainage studies. The Engineer shall coordinate with the State and designers of adjacent projects to check that all proposed drainage systems accommodate the proposed construction phasing plan. The Engineer shall perform the following: 1. Prepare culvert cross sections. (The Engineer should list station locations.) 2. Identify areas requiring trench protection, excavation, shoring and de-watering. 3. Prepare drainage area maps. 4. If applicable, prepare plan/profile sheets for storm drain systems and outfall ditches. 5. Select standard details from State or State District’s list of standards for items such as inlets, manholes, junction boxes and end treatment, etc. 6. Prepare details for non-standard inlets, manholes and junction boxes. 7. Prepare drainage details for outlet protection, outlet structures and utility accommodation structures. 8. Identify pipe strength requirements. 9. Prepare drainage facility quantity summaries. 10. Identify potential utility conflicts and design around them, wherever possible. 11. Take into consideration pedestrian facilities, utility impacts, driveway grades, retaining wall and concrete traffic barrier drainage impacts. 12. Identify existing ground elevation profiles at the ROW lines on storm sewer plan and profile sheets. 13. Locate soil borings every 500 feet along the storm sewer alignment and at every 2000 feet take a piezometric reading. 14. If applicable, prepare Hydraulic Data Sheets for any bridge or cross drainage structures at outfall channel. (Indicate site location...
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Culvert and Storm Drain Design. The Engineer shall update storm sewer layouts, drainage area maps, detention and water quality ponds, and drainage components to accommodate changes to roadway alignments and retaining wall changes.

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