Minimum street grades
Minimum street grades
(OP)
Hi,
Does anybody knows what are the minimum grades for proper drainage on streets with curb and gutter?
Thank you,
Roberttx
Does anybody knows what are the minimum grades for proper drainage on streets with curb and gutter?
Thank you,
Roberttx





RE: Minimum street grades
Good Luck
RE: Minimum street grades
RE: Minimum street grades
KRS Services
www.krs-services.com
RE: Minimum street grades
RE: Minimum street grades
RE: Minimum street grades
We have areas in Northern California that are as flat as a pancake with no nearby major rivers or drainage channels to outfall a storm drain system into. Some municipalities in these types of areas allow a street grade as flat as 0.25% (.0025). The concept behind this is to utilize the street section to carry water during the heavy storm events and have it slowly bleed into a detention pond (sometimes these are park areas). The lot pads are set at an elevation that is a minimum of one foot above the 100-year HGL so although the streets may get flooded, the lots and houses stay dry. The street system then becomes a conveyance system for storm waters during these infrequent storms.
RE: Minimum street grades
I am in El Paso, Tx. The county states the minimum is 0.5, but I've seen even 0.17%. For a nice 2 fps, I calculated 0.25% as the righteous minimum, but my boss argues it's too hard to construct even to 0.35%, therefore, that's what I work with.
Roberttx.
RE: Minimum street grades
I personnly do not design below 0.5% unless really struggling for grade
RE: Minimum street grades