Dimensional standards
Servicing
- Geographic extent
- Citywide
Extracted standards
5 individual requirements pulled out of this section’s prose, each with the sentence it came from.
Other
- Downstream limit of analysis distance150 ft
A point that is at least 150 feet downstream of a point where the receiving pipe or channel is joined by another that has a drainage area that is at least 90 percent of the size of the first drainage area at the point of confluence; or a point that is at least 150 feet downstream of a point where the drainage area is 360 acres or greater.
- Drainage area threshold for downstream analysis360 acresacre43,560 square feet — about the size of an American football field without the end zones.
A point that is at least 150 feet downstream of a point where the drainage area is 360 acres or greater.
- Flood protection design storm
The point of discharge releases stormwater into a stormwater conveyance system that, following the land-disturbing activity, confines the post-development peak flow rate from the ten-year 24-hour storm event within the stormwater conveyance system.
- Improvement factor for sites >1 acreacre43,560 square feet — about the size of an American football field without the end zones.0.8
I.F (Improvement Factor) equals 0.8 for sites > 1 acre or 0.9 for sites ≤ 1 acre.
- Improvement factor for sites ≤1 acreacre43,560 square feet — about the size of an American football field without the end zones.0.9
I.F (Improvement Factor) equals 0.8 for sites > 1 acre or 0.9 for sites ≤ 1 acre.
From the ordinance
Concentrated stormwater flow shall be released into a stormwater conveyance system... improvement factor 0.8 for sites >1 acre or 0.9 for sites ≤1 acre... post-development peak flow rate from the ten-year 24-hour storm event shall be less than the predevelopment peak flow rate...