FDOT Standard Plans Index 430-010: U-Type Concrete Endwalls

Design Criteria

Design Criteria and Guidance FDOT Design Manual (FDM) ; Drainage Manual (DM); Drainage Design Guide (DDG)

Design Assumptions and Limitations

Design Assumptions and Limitations Locate endwalls in accordance with the Drainage Manual Chapter 3 . Steel Grating Use Criteria Provide positive debris control at all upgradient openings. Do not install grates unless one or more of the following conditions exist: A.

Pipe culvert endwalls are located within the designated clear zone. B. Drainage area to culvert consists of median or infield areas or areas where debris and/or drift is negligible.

C. Runoff to culvert is by sheet flow or in such ill-defined channels that debris transport is not considered a major problem. D.

Runoff to culvert is minor except on an infrequent basis (10 to 15 year frequency); for example a drainage basin in flat sandy terrain with normally low ground water table. E. Areas where culvert blockage with resultant backwater would not seriously affect roadway embankment, traffic operation, or upland property.

For sod around end treatments, see Index 570-001 .

Payment

Payment Item number Item Description Unit Measure 430-6AB-CDD U-Type Concrete Endwalls EA 570-1-A Performance Turf SY See the BOE and Specification 430 for additional information on payment, pay item use and compensation.

What your plans must show

Plan Content Requirements for this index — the SPI's checklist for designers.

• In the Roadway Plans: Summarize quantity by location in the Summary of Drainage or Summary of Miscellaneous Drainage Items in accordance with FDM 916 . Clearly show the location of each U-Type Concrete Endwall.