"Especially troubling is the overgrown vegetation in the drainage canals at the Halawa highway interchange. The amount of growth is substantial and could present hazards to overpasses downstream if the canals clog and spill over."

See?  But that'll prove that we "need" them when it happens.  Job security and all.  What YOU are talking about is pro-active mgmt and "scheduling" ahead of time and we don't do that here...apparently.