Use this structure for erosion control of rills and small gullies. Do
not use for subsurface drainage purposes only.
- Watershed area
|
________ ha
|
________ ac
|
- Average grade of watershed
|
________%
|
- Runoff curve number from Tables 2.2 — 2.4
|
________
|
- Peak flow from watershed for a 2 year storm from
Tables 2.5-M to 2.11-M (2.5-I to 2.11-I)
|
________ m/s
|
________ft/s
|
| 5 |
Vertical riser pipe |
| - riser pipe type |
|
|
- riser pipe diameter from Tables 4.19-M to 4.20-M
(4.19-I to 4.20-I) |
________ mm
|
________ in.
|
| - berm height (depth of water + freeboard (minimum 0.15
m (6 in.)) |
________ m
|
________ ft
|
| 6 |
Slope of dedicated outlet tile |
________ %
|
| 7 |
Diameter of dedicated outlet tile based on peak flow
from Line (4), slope of dedicated outlet tile from Line (6) and using
Table 4.18-M (Table 4.18-I), Figure 4.31 or OMAFRA Publication 29,
Drainage Guide for Ontario |
________ mm
|
________ in.
|
| 8 |
Corrugated steel outlet pipe |
|
|
| - type of joint |
butt _____ |
sleeve _____ |
| - outfall type |
flush _____ |
overhanging _____ |
| - pipe diameter from Table 4.24-M (4.24-I) |
________ mm
|
________ in.
|
- pipe length (minimum length + cantilever) from
Table 4.24-M (4.24-I) |
________ m
|
________ ft
|
