Thanks to all who have taken the time to reply.
One of the things that precipitated this thread was that I was designing a parallel curb ramp for a sidewalk adjacent to a school access road - a road not in the public right-of-way. The FHWA publication entitled "Designing Sidewalks and Trails...
Probably the best "big picture" viewpoint on stormwater detention that I have seen, comes from the book "Handbook of Hydrology" (edited by David Maidment):
"Limiting hydrograph peaks from a single design storm, or even two or three design storms at an individual development site does not...
I've never really had a solid conviction on this, so I though that I'd get some opinions from some other site/civil folks working in the USA (or anywhere else, for that matter)...
ADA Standards and various building codes state that ramp landings shall not have a slope steeper that 2-percent in...
