civilman72
Civil/Environmental
- Feb 13, 2007
- 408
I recently reviewed a local municipalities (near Denver) drainage standards and was a little surprised to see the following statement as it applies to inlet control for culverts under roads:
"The maximum allowable headwater for the 100-year design flows will be 1.5 time the culvert diameter. Also, headwater depth may be limited by the street overtopping..."
Does anyone know the reasoning behind limiting the HW/D to such a "small" amount? I don't design small culverts with huge amounts of head, just to "shove" the storm conveyance through, but also limiting the HW/D to 1.5 seems way too conservative, particularly for a 100-year storm event.
Any opinions would be appreciated.
"The maximum allowable headwater for the 100-year design flows will be 1.5 time the culvert diameter. Also, headwater depth may be limited by the street overtopping..."
Does anyone know the reasoning behind limiting the HW/D to such a "small" amount? I don't design small culverts with huge amounts of head, just to "shove" the storm conveyance through, but also limiting the HW/D to 1.5 seems way too conservative, particularly for a 100-year storm event.
Any opinions would be appreciated.
