Or. Admin. R. 629-625-0330 - Drainage
(1) The
purpose of this rule is to provide a drainage system on new and reconstructed
roads that minimizes alteration of stream channels and the risk of sediment
delivery to waters of the state. Drainage structures should be located based on
the priority listed below. When there is a conflict between the requirements of
sections (2) through (6) of this rule, the lowest numbered section takes
precedence, and the later-numbered and conflicting section shall not be
implemented.
(2) Operators shall
not concentrate road drainage water into headwalls, slide areas, high landslide
hazard locations, or steep erodible fillslopes.
(3) Operators shall not divert water from
stream channels into roadside ditches.
(4) Operators shall install dips, water bars,
or cross drainage culverts above and away from stream crossings so that road
drainage water may be filtered before entering waters of the state.
(5) Operators shall provide drainage when
roads cross or expose springs, seeps, or wet areas.
(6) Operators shall provide a drainage system
using grade reversals, surface sloping, ditches, culverts and/or waterbars as
necessary to minimize development of gully erosion of the road prism or slopes
below the road.
Notes
Statutory/Other Authority: ORS 527.710(2)
Statutes/Other Implemented: ORS 527.630(3), 527.765 & 527.714
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