25 Pa. Code § 89.55 – Collection channels.

(a) A channel or ditch that is used to collect or transport waters, or both, into wastewater treatment facilities shall be constructed to safely pass the peak runoff from a precipitation event with a 10-year recurrence interval, or a larger event as specified by the Department.
(b) Channel design shall incorporate:
1. (1) Channel linings to safely pass the design velocities.
2. (2) Adequate freeboard.
3. (3) Energy dissipators when necessary.

Source

The provisions of this § 89.55 adopted December 19, 1980, 10 Pa.B. 4789, effective July 31, 1982, 12 Pa.B. 2382; amended July 30, 1982, 12 Pa.B. 2473, effective July 31, 1982, 12 Pa.B. 2382.

Cross References

This section cited in 25 Pa. Code § 89.173 (relating to performance standards).