Presenter
Presented by Rev. Burgess
Title
Ordinance amending the Pittsburgh Zoning Code, Article III - Overlay Zoning Districts, Chapter 906 - Environmental Overlay Districts, by making technical corrections at subsection 906.07.E.1(e), correcting the Storm Frequency Table for release rates in the Girty's Run Watershed, and at sub-section 906.07.F.2 - Storm Frequencies in the Monongahela River Watershed, correcting the Storm Frequency Table for peak stormwater discharge.
Body
Be it resolved by the Council of the City of Pittsburgh as follows:
Section 1. The Pittsburgh Zoning Code, Article III - Overlay Zoning Districts, Chapter 906 - Environmental Overlay Districts, is amended by making technical corrections at subsection 906.07.E.1(e), correcting the Storm Frequency Table for release rates in the Girty's Run Watershed, and at sub-section 906.07.F.2 - Storm Frequencies in the Monongahela River Watershed, correcting the Storm Frequency Table for peak stormwater discharge, as follows:
906.07.E.1 Girty's Run
. . .
(e) The release rate percentages area:
TABLE INSET:
Subarea 26 70% (2, 5, 10 year storms)
55% (50, 100 year storms)
Subarea 27 55% (2, [4] 5, 10 year storms)
100% (50, 100 year storms)
. . .
906.07.F.2 Storm Frequencies
Stormwater management facilities on all development sites shall control the peak stormwater discharge for the 2-, 10-, 25-, and 100-year storm frequencies. The SCS 24-hour, Type II Rainfall Distribution shall be used for analyzing stormwater runoff for both pre and post development conditions. The 24-hour total rainfall for these storm frequencies in the watershed are:
TABLE INSET:
2 year 2.50 inches
[5] 10 year 3.61 inches
[10] 25 year 4.31 inches
100 year 5.71 inches