18df600c____Minnesota_Stormwater_Manual__1
[2] “Living ditch”, check dams (rip rap, bio-weeper, bio-ditch filter) [3] Can hold water for a time after runoff occurs so need to keep design depths shallow; grade breaks can be obstruction hazard to recreational vehicles using swale [1] 
Provide vegetated swale drainage systems with low head grade breaks in rural sections
BMP options sheet for highway and road runoff management - Minnesota Stormwater Manual
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