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Table ES.3 Historical Flow Data and Peaking Factors
Sewer System Master Plan
City of Morgan Hill
PRELIMINARY
Seasonal Average Maximum Month Maximum Day Total SCRWA Plant Flow
1
(MGD)
(GPCD)
(MGD)
(MGD)
(MGD)
(MGD)
(MGD)
(MGD)
(MGD)
(MGD)
2010
40,246
2.85
71
-
2.69
3.02
2.89
3.22
3.14
4.61
7.19
8.99
2011
38,309
2.85
74
0% 2.66
3.04
2.86
3.71
3.10
5.81
7.37
11.98
2012
39,127
2.69
69
-6% 2.60
2.78
2.66
2.97
2.77
4.61
7.13
9.68
2013
40,079
2.69
67
0% 2.66
2.73
2.70
2.77
2.90
3.09
7.18
7.67
2014
41,197
2.58
63
-4% 2.52
2.64
2.64
2.73
2.81
3.69
6.57
8.45
2015
42,382
2.37
56
-8% 2.31
2.40
2.35
2.64
2.42
3.77
6.02
8.24
2010
-
1.06
-
-
1.00
1.12
1.07
1.20
1.17
1.71
-
-
2011
-
1.07
-
-
1.00
1.14
1.08
1.39
1.17
2.18
-
-
2012
-
1.03
-
-
1.00
1.07
1.02
1.14
1.07
1.77
-
-
2013
-
1.01
-
-
1.00
1.03
1.02
1.04
1.09
1.16
-
-
2014
-
1.02
-
-
1.00
1.05
1.05
1.08
1.12
1.46
-
-
2015
-
1.03
-
-
1.00
1.04
1.02
1.15
1.05
1.64
-
-
Notes:
6/29/2016
1. Total SCRWA Plant Flow represents combined flow of cities of Morgan Hill and Gilroy.
2. Definitions are as follows:
AAF - Average Annual Flow (annual flow, expressed in daily or other time units)
ADWF - Average Dry Weather Flow (average flow that occurs on a daily basis during the dry weather season)
AWWF - Average Wet Weather Flow (average flow that occurs on a daily basis during the wet weather season)
MMDWF - Maximum Month Dry Weather Flow (maximum month flow during the dry weather season)
MMWWF - Maximum Month Wet Weather Flow (maximum month flow during the wet weather season)
MDDWF - Maximum Day Dry Weather Flow (highest measured daily flow that occurs during a dry weather season)
MDWWF - Maximum Day Wet Weather Flow (highest measured daily flow that occurs during a wet weather season)
PDWF - Peak Dry Weather Flow (highest measured hourly flow that occurs during a dry weather flow)
PWWF - Peak Hour Wet Weather Flow (highest measured hourly flow that occurs during wet weather)
3. Source:
2010 and 2011 flows from South County Regional WasteWater Authority Community Development Report
2012, 2013, 2014, and 2015 flows from South County Regional WasteWater Authority Public Works Report
MDDWF MDWWF
Historical Peaking Factors (Applied to ADWF)
MMWWF MDDWF MDWWF
ADWF AWWF MMDWF
Year
Population
Average Annual Flow
AAF
Per Capita
Flow
Percentage
Change