Combined Sewer Overflow Long Term Control Plan Update. March 21, 2017

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1 Combined Sewer Overflow Long Term Control Plan Update March 21, 2017

2 CSO LTCP Update Background Indiana has over 100 CSO communities that account for ± 12.5% of national total Lafayette has 10 active CSO s 1972 Clean Water Act Required States to establish Water Quality Standards (WQS) for their waterways Indiana Water Pollution Control Board (WPCB) designated all water bodies in Indiana fishable and swimmable NPDES Permit Regulates Wastewater Treatment Plant (WWTP) and CSOs Issued by Indiana Department of Environmental Management (IDEM) under delegation agreement of U.S. Environmental Protection Agency (EPA) In 1950s through 1980s requirements focused on improvements to WWTP Today, requirements focus on CSO controls CSO Area (Number) CSO Area 001 Greenbush St. 002 Salem St. 003 Cincinnati St. 004 Ferry St. 006 Pearl River 007 Williams St. 008 Shamrock Park 009 WWTP th St th St. 012 Fairgrounds 015 6th and Oaklawn 017 Old Romney Rd.

3 Meeting the Regulations Lafayette Has Not Been Idle One of the last Indiana cities to receive CSO permit language permit effective May 1, 2003 (renewed 2008 and 2013) Stream Reach Characterization and Evaluation Report (SRCER) and Collection system model completed 2001 CSO Operational Plan and Public Notification Program completed 2004 Wastewater treatment plant upgrade and expansion completed 2004 State Judicial Agreement (SJA) filed 2007 Long Term Control Plan (LTCP) approved 2009

4 Early Action Projects Upgraded/Expanded WWTP (2004) Annual Average Flow: 16 MGD to 26 MGD Peak Flow: 22 MGD to 52 MGD New Regionalized Lift Stations Prairie Oaks (2005) Ross Road (2008) Pearl River (2008) Eliminated two CSO s CSO 008 (Shamrock Park) (2002) CSO 017 (Old Romney Rd.) (2005) CSO 004 (Ferry Street) (2009) Pearl River CSO Tunnel

5 Early Action Projects - Benefits Receiving Stream Annual Average Overflow Volume (MG) Wabash River Durkees Run Ditch CSO Number Total Before projects After projects % reduction for entire collection system 82% reduction from CSO s 002, 003, 004, & 006 Receiving Stream Wabash River Annual Average CSO Frequency Durkees Run Ditch CSO Number Max Before projects After projects % reduction for all CSO s

6 Lafayette s Pearl River CSO Tunnel Project

7 Initial Project New 60 Interceptor Sewer through downtown to eliminate Parking Lot LS New Pearl River (18 MGD) LS to replace Parking Lot LS 2.0 MG CSO Storage tank

8 Challenges 4 Railroad Tracks Downtown 2 nd Street Historic Buildings Bus Operation Canal

9 60 Sewer changed to 120 tunnel to accommodate CSO LTCP Storage Pearl River Trunk Sewer diverted to tunnel to eliminate restriction at RR CSO Screening Structure added to provide floatable control on remaining CSO Events Lift Station size increased to accommodate future capacity needs of 55 mgd Redefined Project

10 Project s New Facilities New Lift Station Three dry-weather pumps now, three wet-weather pumps in future Dry-weather firm pumping capacity of 18 mgd Future dry/wet-weather firm pumping capacity of 35 to 55 mgd Two Channel Monsters capable of 20 mgd each (two more in future) CSO Screening Structure Two 100 mgd Romag-type screens to keep solids from going to Wabash River. Solids continue through lift station to WWTP. Four Red Valve Tide Flex valves on end of structure for backflow prevention Storage Tunnel 120 pipe (original plan was for a 60 pipe) Capable of storing one million gallons Runs through major downtown Lafayette street. Tunneling became a better option than open-cut installation.

11 Lafayette s Earl Avenue/Durkees Run Sewer Separation Project

12 Initial Project 36 parallel interceptor sewer along Durkees Run ditch from Jeff HS to WWTP Throttle pipes to three existing CSO Outfalls

13 Challenges

14 Redefined Project Separation of 800 acres of combined sewers storm installation along Earl Avenue Divert Storm Water from WWTP Improve Area Wide Drainage and Roadway Corridors Transfer of U.S. 52 (Sagamore Parkway) to City Condition of Earl Avenue Pavement/Infrastructure

15 Project s New Facilities Over two miles of storm sewer Drainage outlet for Sagamore Parkway corridor High school and community outreach

16 Jeff HS Stormwater Park

17 Outdoor Classroom Constructed Wetland Ecosystem

18 Lafayette s Brown Street and Greenbush CSO Tank Projects

19 Initial Project 5.9 MG storage tank near Greenbush outfall Large diameter sewer along old railroad corridor through downtown Cross two sets of railroad tracks

20 Challenges Wabash Avenue Intersection of S. 9 th Street and South Street Old Railroad Corridor on S. 4 th Street

21 Sewer re-routed to Brown Street and tied into Pearl River CSO Tunnel Pervious pavers installed to assist with peak flows Tank size reduced to 4.2 MG Incorporated WREC s riverfront development Redefined Project

22 Project s New Facilities

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24 Future Projects Lift station upgrade and expansion 5.3 MG CSO storage tank New 60 force main to WWTP 119 mgd CSO highrate treatment facility near WWTP

25 Project Impacts Early Action Projects 52% annual reduction in volume overall for combined sewer system Pearl River CSO Tunnel Project 75% annual reduction in downtown CSO s Earl Avenue/Durkees Run Project Over 100 MG stormwater eliminated annually from entering combined sewer system Brown Street/Greenbush Tank Anticipated reduction of CSO overflows from 96 per year to three per year

26 LAFAYETTE MUNICIPAL SEWAGE WORKS Lafayette, Indiana Survey of Sewer Rates Indiana Cities and Towns over 50,000 Population As of January 2017 City/Town 2010 Census Population County Type of Ownership Effective Date of Sewer Rate Sewer Rate Evansville (1) 117,429 Vanderburgh Municipal Terre Haute (1) (2) 60,785 Vigo Municipal Indianapolis 820,445 Marion Trust South Bend 101,168 St. Joseph Municipal Muncie (1) (2) 70,085 Delaware Municipal Anderson (2) 56,129 Madison Municipal Gary (2) 80,294 Lake Municipal Lafayette Phase III 67,140 Tippecanoe Municipal Fort Wayne 253,691 Allen Municipal Lafayette Phase II 67,140 Tippecanoe Municipal Bloomington 80,405 Monroe Municipal Lafayette Phase I 67,140 Tippecanoe Municipal Noblesville 51,969 Hamilton Municipal Elkhart 50,949 Elkhart Municipal Lafayette Current 67,140 Tippecanoe Municipal Fishers 76,794 Hamilton Municipal Carmel 79,191 Hamilton Municipal Hammond (1) (2) 80,830 Lake Municipal (1) Rate increase pending. (2) Subsidized by property tax.

27 Questions?