Combined Sewer Overflow Update

Real Time Combined Sewer Overflow Monitoring

The table below reflects the current operational status of the Combined Sewer Overflow (CSO) monitoring sites in the City of Spokane. As of Dec 21, 2006 there are 26 monitoring sites. Nine of the monitoring sites are priority sites. If a site is flashing, that represents that a CSO overflow event is occurring or has occurred in the last 48 hours. The date and time listed is the start time of the overflow event and will automatically shut off after 48 hours.

All residents and visitors to the area, as a precaution, should avoid water contact sports and activities (ie. swimming, boating, fishing, etc...) during rainfall and snowmelt conditions that result in a discharge (CSO overflow) as observed in the field or as indicated on the table below.

Also, residents can help locate and solve sewer system problems by calling (509) 344-FISH whenever they observe a discharge from the CSO pipe to the river (especially during the summer months). Just make sure to note the CSO two (2) digit number on the sign located next to the outfall pipe so City staff will know exactly where the overflow occurred. The City will then confirm whether the discharge is from a combined sewer system or stormwater system.

CSO #	OUTFALL LOCATION	STATUS	OVERFLOW DATE & TIME
CSO2	0.5 miles downstream of RPWRFMap	IS	none
CSO6	0.25 miles upstream of RPWRFMap	IS	none
CSO6D *	0.25 miles upstream of RPWRFMap	IS	none
CSO7	0.4 miles upstream of RPWRFMap	IS	none
CSO10	0.1 miles downstream from T.J.Meenach BridgeMap	IS	none
CSO12	0.55 miles upstream of T.J.Meenach BridgeMap	IS	none
CSO14	2.0 miles upstream of T.J.Meenach BridgeMap	IS	none
CSO15	2.5 miles upstream of T.J.Meenach BridgeMap	IS	none
CSO16	1.45 miles downstream of Monroe St. DamMap	IS	none
CSO19	High Bridge (East Side)Map	IS	none
CSO20	2.65 miles upstream of High BridgeMap	IS	none
CSO22	0.7 miles downstream at Monroe St. DamMap	IS	none
CSO23	0.3 miles downstream of Monroe St. DamMap	IS	none
CSO24A	0.3 miles downstream at Monroe St. DamMap	IS	none
CSO24B	0.3 miles downstream at Monroe St. DamMap	IS	none
CSO25	0.3 miles downstream of Monroe St. DamMap	IS	none
CSO26	Monroe St. DamMap	IS	none
CSO33A	0.15 miles upstream of J.Keefe BridgeMap	IS	none
CSO33B	0.15 miles upstream of J.Keefe BridgeMap	IS	none
CSO33C	0.15 miles upstream of J.Keefe BridgeMap	IS	none
CSO33D	0.15 miles upstream of J.Keefe BridgeMap	IS	none
CSO34	Trent BridgeMap	IS	none
CSO38	0.75 miles downstream from Greene BridgeMap	IS	none
CSO39	0.5 miles downstream of Greene BridgeMap	IS	none
CSO40	0.25 miles downstream of Greene BridgeMap	IS	none
CSO41	0.5 miles upstream of GreeneMap	IS	none
CSO42	0.5 miles downstream of Upriver DamMap	IS	none

* This outfall is not storm related
IS - In Service
OS - Out of Service
N/A - Not Available

Flow monitoring equipment is subject to periodic malfunctions due to debris which may foul the sensors. The event table above is subject to revision and is for informational purpose only. Official verification of actual overflow frequency, duration, and volume is available below in the monthly overflow reports.

Annual Reports

An Annual CSO report is submitted each July to Ecology for review and approval.

CSO Annual Report - FY 2010 (PDF, 710KB)
CSO Annual Report - FY 2009 (PDF, 773KB)
CSO Annual Report - FY 2008 (PDF, 1.57MB)
CSO Annual Report - FY 2007 (PDF, 593KB)
CSO Annual Report - FY 2006 (PDF, 610KB)
CSO Annual Report - FY 2005 (PDF, 582KB)
CSO Annual Report - FY 2004 (PDF, 681KB)
CSO Annual Report - FY 2003 (PDF, 502KB)
CSO Annual Report - FY 2002 (PDF, 1.54MB)
CSO Annual Report - FY 2001 (PDF, 1.49MB)
CSO Annual Report - FY 2000 (PDF, 136KB)

Monthly Reports

To accommodate data analysis and report preparation, monthly reports are scheduled to be posted by the 15th of the second month after the month of the report. For example the CSO Monthly Report for January would be scheduled to be posted by the 15th of March.

2011

CSO Monthly Report - Nov 2011 (PDF, 74KB)
CSO Monthly Report - Oct 2011 (PDF, 72KB)
CSO Monthly Report - Sep 2011 (PDF, 65KB)
CSO Monthly Report - Aug 2011 (PDF, 72KB)
CSO Monthly Report - Jul 2011 (PDF, 71KB)
CSO Monthly Report - Jun 2011 (PDF, 77KB)
CSO Monthly Report - May 2011 (PDF, 79KB)
CSO Monthly Report - Apr 2011 (PDF, 67KB)
CSO Monthly Report - Mar 2011 (PDF, 86KB)
CSO Monthly Report - Feb 2011 (PDF, 72KB)
CSO Monthly Report - Jan 2011 (PDF, 49KB)

2010

2009

2008