Interim Interconnector Sewer Operational Plan
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1 Interim Interconnector Sewer Operational Plan Gary Hickman Plant Manager Jackson Pike Wastewater Treatment Plant Jeff Hall Assistant Plant Manager Southerly Wastewater Treatment Plant
2 Columbus Area Collection System Overview JPWWTP SWWTP
3 Interim Interconnector Sewer Operational Plan (2003) History 1986 Project 88 Reduced JPWWTP design to 60 MGD 1991 Start-up of the Interconnector Sewer between JPWWTP and SWWTP 1994, 1995 Max Wet Weather Flow Analysis JPWWTP Anytime Flow: 70MGD, Ideal 115 MGD SWWTP Anytime Flow: 130MGD, Ideal 180 MGD 1996 Interconnector System and Stormwater Control Program Plan of Operations
4 Interim Interconnector Sewer Operational Plan 2003 Purpose: To provide for the necessary uniform combined sewer overflow (CSO) control/separate sanitary sewer overflow (SSO) control operating strategy as well as to account for the operation of the West Columbus Local Protection Project (WCLPP) and its downstream interior drainage features.
5 Before System Improvements Scioto River OSIS Whittier St. STORM TANK 3 STORM TANK 2 STORM TANK 1 OVERFLOW DSR 83 FRANKLIN MAIN DESHLER TUNNEL WEST SIDE SEWERS Big Run GRIT TANKS FDS RENICK RUN PUMPS FCS IPS JPWWT P BIG WALNUT INTERCEPTOR SEWER OVERFLOW SWWTP
6 Interim Interconnector Sewer Operational Plan (Update) Major Operational Components Jackson Pike WWTP Whittier Street Storm Tanks Grit Chamber Inlet Gate Old Renick Run Pump Station Flow Diversion Structure Flow Control Structure Southerly WWTP Interconnector Pump Station
7 Jackson Pike Wastewater Treatment Plant Old Grit Removal Facility Removed
8 Jackson Pike Wastewater Treatment Plant Old Renick Run Storm Sewer Pumping Station Old Pump Station New Pump Station
9 Plant Capacity Improvements Scioto River OSIS Whittier St. STORM TANK 3 STORM TANK 2 STORM TANK 1 OVERFLOW DSR 83 FRANKLIN MAIN DESHLER TUNNEL WEST SIDE SEWERS Big Run FDS JPWWTP 150 MGD OVERFLOW SWWTP 330 MGD BIG WALNUT INTERCEPTOR SEWER BWARI
10 Interim Interconnector Sewer Operational Plan Update Major Operational Components Jackson Pike WWTP Whittier Street Storm Tanks Flow Diversion Structure Southerly WWTP Interconnector Pump Station (level sensor)
11 Jackson Pike Wastewater Treatment Plant OSIS BRS SMRS FDS OARS S-2 OARS S-1 IC New Grit Facility FCS (Weir Removed)
12 Jackson Pike Wastewater Treatment Plant Whittier Street Storm Tanks
13 Jackson Pike Wastewater Treatment Plant Flow Diversion Structure (FDS)
14 Southerly Wastewater Treatment Plant Interconnecting Pump Station
15 Interim Interconnector Sewer Operational Plan Major Operational Components Jackson Pike WWTP Whittier Street Storm Tanks Flow Diversion Structure Southerly WWTP Interconnector Pump Station (Level Sensor)
16 Southerly Wastewater Treatment Plant Inter-Connector Sewer Big Walnut Outfall Big Walnut Augmentation/ Rickenbacker Interceptor
17 Interim Interconnector Sewer Operational Plan Normal Operations (JPWWTP): Keep FDS Interconnector Gates Closed Keep both Whittier Street OSIS Regulator Gates open 36 inches (100%) Maintain the Jackson Pike WWTP wet well between 6 12 feet. (USGS ) Maintain JPWWTP treatment between MGD
18 Interim Interconnector Sewer Operational Plan Normal Operations (SWWTP): Maintain an Influent Junction Chamber (IJC) level of between 2 and 5 feet. (USGS )
19 Interim Interconnector Sewer Operational Plan Wet Weather Operations If possible gradually increase treatment at Jackson Pike and Southerly while maximizing conveyance and collection system storage. Gradually bring JP wetwell up to 14 foot while increasing treatment to 100 MGD. (Continue to increase flow to 160 MGD.) Increase flow at SWWTP to 180 mgd while allowing IJC level to rise to capture first flush. Continue to increase SWWTP flow and bring additional equipment online until all equipment is in service and plant flow is 330 mgd prior to an 18 (USGS 669.5) IJC level.
20 JP FDS Interconnector Gate Operation Jackson Pike will maintain wet well elevation at ~ 14 feet by using FDS Interconnector Gate to Southerly to capture first flush.
21 Interconnector Sewer Profile JP to Southerly
22 Whittier Street Regulator Gates
23 Interim Interconnector Sewer Operational Plan Once JP treatment capacity is maxed out (160 MGD), additional flow cannot be conveyed to Southerly, and the JP wet well cannot be maintained below USGS 690 initiate pumped bypass. [Note: operate pumped bypass until the JP wet well can be sustained below USGS 688.
24 Interim Interconnector Sewer Operational Plan Update Flood Protection Measures: When the Scioto River reaches the 25-year elevation (USGS 706.2), as measured at the USGS Gauging Station located behind the Jackson Pike WWTP on the Scioto River or as predicted by the National Weather Service, close the Sluice Gate at the Scioto Main Flow Control Structure at Rhodes Park. Divert all flows at Jackson Pike WWTP to the Mechanical Bypass. Close FDS Gates to Interconnector. Pump up to maximum Headworks capacity (approximately 180 mgd) to the Scioto River.
25 Interim Interconnector Sewer Operational Plan How Has the Interim Interconnector Sewer Operational Plan Worked to Date?
26 Jackson Pike Wastewater Treatment Plant Hydraulic Performance 2005 to Present Jackson Pike Wastewater Treatment Plant Distribution of top 100 flows 2005 to Present Occurences YTD #/year
27 Southerly Wastewater Treatment Plant Hydraulic Performance 2005 to Present 35 Southerly Wastewater Treatment Plant Distribution of top 100 flows 2005 to Present Occurrences YTD
28 Interim Interconnector Sewer Operational Plan Where Do We Go From Here?
29 Interim Interconnector Sewer Operational Plan Current and Future Projects Olentangy Scioto Interceptor Sewer Augmentation Relief Sewer (OARS) Tunnel Project Completion 2015 Will provide nearly 60 million gallons of deep tunnel wet weather flow storage ~23,400 feet long 20 feet in diameter, feet deep.
30 Scioto River Future OARS Tunnel OSIS STORM TANK 3 STORM TANK 2 STORM TANK 1 OVERFLOW DSR 83 FRANKLIN MAIN DESHLER TUNNEL WEST SIDE SEWERS FDS JPWWTP 150 MGD BIG WALNUT INTERCEPTOR SEWER OVERFLOW SWWTP 330 MGD BWARI
31 Future SSO Mitigation Alum Creek Relief Tunnel (ART) - Start date Additional deep tunnel storage ~73,000 feet long, with tunnel diameter varying from feet. Olentangy Relief Tunnel (ORT) Start date TBD. Additional deep tunnel storage ~58,000 feet long, with tunnel diameter of 14 feet.
32 Interim Interconnector Sewer Operational Plan Questions?
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