Drop Pipe Inlet Design Information
Sheet
- Watershed area
|
_______ ha
|
_______ ac
|
- Average grade of watershed
|
_______ %
|
- Runoff curve number from Table 2.2 — 2.4
|
_________
|
- Peak flow from watershed for a 10 year storm from
Table 2.5-M to 2.11-M (2.5-I to 2.11-I)
|
_______m3/s
|
_______ft3/s
|
- Drop pipe fall (top elevation - bottom elevation)
|
_______ m
|
_______ ft
|
- Horizontal distance to complete fall
|
_______ m
|
_______ ft
|
- Type of drop pipe inlet — Section 4.3.2
Fill out applicable section below (A/B/C)
|
|
|
A. Drop pipe structure
| Number of units |
|
| Head of water over horizontal pipe |
_______ m
|
_______ ft
|
| Horizontal pipe diameter — Table 4.15-M (4.15-I) |
_______ mm
|
_______ in.
|
| Vertical pipe diameter — Table 4.16-M (4.16-I) |
_______ mm
|
_______ in.
|
Berm height (min. 450 mm (18 in.) + freeboard 300 mm
(12 in.)) |
_______ mm
|
_______ in.
|
B. Sloped pipe structure
| Number of units |
|
| Slope of pipe (>2.5%) (_______ m (_______ ft) fall
÷ _______ m (_______ ft) length) x 100 = _______% |
_______ %
|
| Diameter of sloped pipe — Table 4.17-M (4.17-I) |
_______ mm
|
_______ in.
|
| Berm height (pipe diameter + freeboard 300 mm (12 in.))
|
_______ mm
|
_______ in.
|
C. Small capacity riser pipe
| Number of units |
|
| Slope of horizontal pipe |
_______ %
|
| Diameter of horizontal pipe — Table 4.18-M (4.18-I)
|
_______ mm
|
_______ in.
|
Riser pipe diameter — Table 4.19-M to 4.20-M
(4.19-I to 4.20-I) |
_______ mm
|
_______ in.
|
Orifice plate required — Table 4.21-M to 4.22-M
(4.21-I to 4.22-I) |
______No |
______ Yes |
diameter
______ mm
|
diameter
______
in.
|
Berm height (depth of water + freeboard
(minimum 0.15 m (6 in.))) |
_______ mm
|
_______ in.
|
- Antiseepage collars
| Antiseepage collars required - Section 4.3.2 |
______No
|
______ Yes
|
| Number of collars |
___________
|
| Diameter required |
_______ mm
|
_______ in.
|
| Distance from drop pipe |
1st collar
|
2nd collar
|
|
______m
|
______ ft
|
______m
|
______ ft
|
- Inlet grate — spacing of bars (refer to Section 4.3.2)
|
_______ mm
|
_______ in.
|
|
10. Horizontal or sloped pipe — length
|
-
_______ m
|
-
_______ ft
|
- Enter other dimensions on sketches (Figures 4.11 to 4.13).
For more information:
Toll Free: 1-877-424-1300
Local: (519) 826-4047
E-mail: ag.info.omafra@ontario.ca
|
This site is maintained
by the Government of Ontario 
Queen's
Printer for Ontario 