CSO Information | Fox River Water Reclamation District

A portion of the FRWRD service area in central Elgin is connected to a combined sewer system (CSS). A combined sewer system is where all sanitary waste and stormwater flows are combined into the same sewers for transport. During normal flow periods, all the flows in the CSS are transported to the Albin D. Pagorski Water Reclamation Facility (ADP WRF) for treatment. Most of the CSS and combined sewer overflows (CSOs) are owned by the City of Elgin. FRWRD owns a single combined sewer overflow (CSO) discharge point in the system located on Lower Wellington Avenue just north of US 20. During very high flows associated with storm events, the flows in the CSS can exceed the capacity of the system. In those situations, CSOs are activated and flows over the amount that can be transported for treatment are discharged directly to the Fox River. For the CSO point owned by FRWRD, the following table provides information on discharge events that have occurred. Data will begin being populated for events starting April 1, 2016. For events prior to April 1, 2016, contact FRWRD for information.

CSO Event Table for Lower Wellington CSO Discharge Point Owned by FRWRD

CSO Outfall # = 004
Outfall Description = Lower Wellington Avenue just north of US-20

Start Date	Rainfall Duration (hrs.)	Rainfall Amount (in.)	Estimated Duration of CSO Discharge (hrs.)	Estimated Volume of CSO Discharge (MG)
8/14/2023	2.75	0.8	0.03	0.0067
7/29/2023	0	0	0.27	0.054
7/28/2023	6.5	2.73	1.09	0.323
7/22/2023	2.75	1.04	0.28	0.056
7/5/2023	3.75	1.52	0.57	0.137
6/24/2023	2.75	1.07	0.34	0.0693
4/4/2023	1.00	0.58	0.471	0.102
3/31/2023	1.75	0.90	0.314	0.077
2/27/2023	7.00	1.42	0.313	0.066
8/28/2022	2.00	1.46	0.836	0.210
8/8/2022	4.50	1.02	0.137	0.032
7/23/2022	1.25	1.32	0.689	0.223
7/6/2022	6.00	2.45	0.661	0.139
7/5/2022	1.25	3.38	1.348	0.438
5/25/2022	2.25	1.38	0.975	0.241
4/22/2022	3.50	0.90	0.365	0.079
8/9/2021	0.75	0.78	0.273	0.062
6/26/2021	2.00	0.37	0.101	0.022
6/25/2021	6.50	1.41	0.145	0.030
6/20/2021	2.25	1.65	0.553	0.137
7/15/2020	9.50	2.02	0.065	0.011
6/29/2020	3.75	2.08	0.293	0.088
6/26/2020	0.50	0.55	0.828	0.213
5/24/2020	0	0	2.077	0.282
5/23/2020	0.75	0.74	1.291	0.230
5/19/2020	1.5	0.04	3.068	0.475
5/18/2020	0	0	17.894	2.572
5/17/2020	20.50	2.36	9.118	1.784
5/15/2020	3.00	1.58	2.603	0.684
5/14/2020	4.00	1.86	0.751	0.125
3/28/2020	1.75	0.86	0.035	0.004
10/11/2019	2.25	0.35	1.009	0.394
10/5/2019	2.00	0.29	0.019	0.008
10/2/2019	3.75	1.17	1.494	0.583
9/29/2019	1.75	0.43	0.225	0.088
9/27/2019	2.00	0.41	0.204	0.080
9/22/2019	1.75	0.58	0.398	0.155
9/13/2019	5.25	3.41	2.428	0.947
8/26/2019	1.75	1.06	0.236	0.092
7/29/2019	3.50	1.05	0.107	0.042
7/18/2019	4.25	1.32	0.332	0.129
6/28/2019	0.50	0.68	0.029	0.011
6/24/2019	0.75	0.43	0.074	0.029
6/4/2019	3.50	0.52	0.128	0.050
5/28/2019	4.50	0.54	0.175	0.068
5/27/2019	1.25	0.15	0.156	0.061
5/22/2019	4.25	0.58	0.186	0.072
5/9/2019	4.25	0.79	2.185	0.852
5/8/2019	4.25	1.36	0.549	0.214
5/2/2019	8.25	0.86	2.584	1.008
5/1/2019	5.25	0.28	0.139	0.054
4/30/2019	12.50	0.75	1.002	0.391
4/29/2019	5.75	1.11	0.911	0.355
4/11/2019	2.00	0.56	0.613	0.239
3/14/2019	0.50	0.29	0.224	0.087
3/9/2019	4.25	0.52	0.652	0.254
2/23/2019	15.00	0.75	1.186	0.462
2/7/2019	2.75	0.41	0.137	0.053
2/5/2019	1.10	0.80	0.617	0.241
12/1/2018	22.75	2.10	0.949	0.370
10/10/2018	1.50	0.33	0.234	0.093
10/9/2018	0.00	0.00	0.068	0.027
10/8/2018	0.00	0.00	1.024	0.399
10/7/2018	2.00	0.40	0.862	0.336
10/5/2018	5.00	0.70	0.329	0.128
10/1/2018	3.00	1.82	1.463	0.571
9/3/2018	15.75	1.57	0.706	0.275
9/2/2018	2.25	0.24	0.331	0.129
8/29/2018	5.00	1.90	0.723	0.282
8/28/2018	0.25	0.61	0.071	0.028
8/25/2018	2.25	0.46	0.094	0.037
8/17/2018	2.00	0.45	0.236	0.092
8/7/2018	1.75	1.43	0.905	0.353
7/29/2018	1.50	1.08	0.351	0.137
7/21/2018	2.50	0.68	0.167	0.065
6/27/2018	5.75	1.86	6.469	2.523
6/26/2018	2.00	0.70	1.167	0.455
6/22/2018	3.50	0.65	0.502	0.196
6/21/2018	5.75	1.00	0.937	0.365
6/16/2018	1.25	0.58	0.803	0.313
6/10/2018	4.50	0.57	0.141	0.055
6/9/2018	6.25	1.08	0.281	0.110
5/30/2018	3.50	2.70	1.910	0.745
5/21/2018	7.50	1.08	0.669	0.261
5/20/2018	2.50	0.45	0.084	0.033
5/14/2018	16.75	1.38	0.708	0.276
5/13/2018	3.25	0.65	0.109	0.043
5/2/2018	12.75	2.30	2.866	1.118
4/15/2018	15.25	0.69	0.074	0.029
3/1/2018	4.00	0.50	0.323	0.126
2/20/2018	8.50	1.00	0.824	0.322
1/22/2018	3.25	0.66	0.336	0.131
10/14/2017	21.25	3.19	1.334	0.520
10/11/2017	5.25	1.00	0.354	0.138
8/16/2017	6.00	1.04	0.425	0.166
7/23/2017	1.00	0.94	1.480	0.577
7/22/2017	6.25	0.44	0.865	0.337
7/21/2017	7.25	1.86	2.731	1.065
7/20/2017	2.75	1.13	3.199	1.248
7/19/2017	2.50	0.22	0.021	0.008
7/12/2017	15.5	1.67	0.093	0.036
7/11/2017	2.25	2.48	1.529	0.596
7/10/2017	2.50	0.59	0.394	0.154
6/28/2017	2.50	1.66	1.366	0.533
6/23/2017	2.00	0.95	0.456	0.178
6/17/2017	1.25	0.28	0.053	0.021
6/14/2017	2.50	0.99	0.333	0.130
5/23/2017	1.75	0.34	0.532	0.207
5/20/2017	1.75	0.27	0.048	0.019
5/17/2017	0.75	0.23	0.351	0.137
5/10/2017	2.25	0.65	0.984	0.384
5/9/2017	1.50	0.33	0.125	0.049
5/6/2017	3.00	0.41	0.060	0.023
4/30/2017	4.25	0.96	1.404	0.548
4/29/2017	11.25	1.56	1.965	0.766
4/16/2017	3.00	0.50	0.124	0.048
4/10/2017	0.50	0.12	0.362	0.141
3/30/2017	13.00	1.96	1.908	0.744
1/17/2017	1.25	0.35	0.609	0.236
1/16/2017	7.00	0.74	0.775	0.302
11/28/2016	3.00	0.36	0.021	0.008
10/26/2016	14.00	1.41	0.716	0.279
10/6/2016	14.25	1.24	0.314	0.122
9/7/2016	0.50	0.71	0.078	0.030
8/20/2016	0.75	0.66	0.524	0.204
8/18/2016	0.75	0.19	0.018	0.007
7/23/2016	3.00	0.77	0.422	0.165
7/21/2016	0.75	0.82	0.332	0.130
7/6/2016	5.25	0.79	0.096	0.037
6/22/2016	1.75	0.82	0.313	0.122
6/15/2016	2.50	0.93	0.208	0.081

FRWRD has several documents available related to the CSO system. Those documents are available below.

FRWRD CSO Long Term Control Plan (LTCP)
FRWRD CSO Pollution Prevention Plan (PPP)
FRWRD CSO O&M Plan
FRWRD CSO Public Notification Plan