Comprehensive Sewer Planning Update Meeting M. Chris Swartz, Village Manager Mustafa Emir, Village Engineer March 23, 2015

Tonight’s Agenda Recap of 2011 Comprehensive Facility Plan Status of Projects Status of Combined Sewer Service Area Planning Discussion/Questions

Facility Plan Goals GOAL 1 - Provide basement back-up protection for 2 inches of rain in 1 hour throughout the Village by 2015 GOAL 2 - Reduce Inflow and Infiltration (I&I) in separated area by 40% by 2035 and 80% long-term, for back-up protection for 4 inches of rain in 1 hour GOAL 3 - Separation of the sanitary and storm sewer in the combined area will be completed by 2035, resulting back- up protection against a minimum of 4 inches per 1 hour in this area GOAL 4 - Reduce street flooding throughout the Village to provide a minimum of 2 feet freeboard during 3 inch per hour rainfall by 2020.

Sewer Planning Recap July ‘10 Nearly1,000 homes damaged from flooding and basement back-ups caused by July 15 and July 22 storms. August ‘10 Four public meetings Village made sewers a “top priority” Performance Goals Established. Village Engineer began developing “Comprehensive Sanitary Sewer, Stormwater and Drainage Facility Plan” Sept. ‘10 – Feb. ‘11 Village Engineer completes a full study of Village’s sewers; problems and solutions identified; initial plan was drafted Six public update meetings Village pre-qualified four firms for plan review and Pre-Design Memorandums

Sewer Planning Recap, continued… March ‘11 – May ‘11 Four firms reviewed the plan and developed Pre-Design Memorandums. The plan was revised to include recommendations from Pre- Design Memorandums. May ’11Village Board approved the plan Four firms were hired to complete design/engineering for initial sewer projects June ‘11Village approves contract modifications to incorporate sewer improvements into 2011 Downer Avenue road project July ’11Surveys sent out to all Shorewood property owners to gauge support for a proposed funding plan for sewer projects Sept. ’11Village receives survey results from UW-Milwaukee Center for Urban Initiatives and Research

Sewer Planning Recap, continued… 2012 Basin 1 and 6 Sewer Improvement Design 2012 Basin 1 and 6 Sewer Improvement Construction 2014 Phase II(a)of Basin 6 sewer improvement construction Separation of Basin 6 from Whitefish Bay 2014 Continued refinement of Facility Plan recommendations for Combined Sewer Service Area 2014 Update provided to Village Board in August 2014 MMSD Alternatives study completed in November 2015 Cost estimates that compare Combined Service Area alternatives

Facility Plan Project Summary Basin 1 Sanitary and Storm Sewers Basin 6 Sanitary and Storm Sewers Combined Area North Improvements Combined Area South Storm sewer construction Inflow-Infiltration reduction in public and private sewers

Separated Sewer Service Area West side of the Village Basin 1 and Basin 6 most affected by Basement Backups

Basin 1 Status Upsizing of current sanitary pipe that runs from Newhall to Olive to Wilson. New storm sewer that drains Newhall to Capitol. Construction Complete in 2012.

Basin 6 Status New sanitary sewer pipes along Glendale, Wildwood and Kensington, including one sewer bypass. Cost shared with Whitefish Bay. Construction of Phase I completed in 2012 and Phase II(a) in Phase II(b) remaining: New storm sewer outfall draining Glendale Ave. directly to the Milwaukee River. Basin 6 Sewer Design is coordinated with Pavement Management Plan and road reconstruction.

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Other Basin 1 and 6 Improvements Sanitary Sewer overflows to Milwaukee River are in place for emergency conditions. These overflows are newly installed and are designed to protect against basement backups during extreme rains. Lining of mainline sanitary sewers completed in both basins terrace drains Installation of terrace drains to accept future connections from foundation drains Private lateral lining to reduce inflow and infiltration continues on schedule in both basins. Private lateral lining is on year 4 of 7

Measured Benefits of Sewer Lining in Basins 1 and 6 Flow meter data shows that mainline lining has helped decrease I/I in Basins 1 and 6. Basin 1 flows are reduced by an average of 65 percent Basin 6 flows are reduced by an average of 55 percent. The amount of I/I entering the Village’s sewers was measured to be less than 2010 or 2011 even though 2013 was a much wetter year. The sewer system is still susceptible to I/I, which indicates that sources other than mainline sewers still exist. Lining of private laterals is still warranted to further reduce I/I.

Continued Progress Brings Success in Reducing Inflow Infiltration Communication from MMSD on September 13, 2010 : Noncompliance “Noncompliance: The peak hourly flow rates in metersheds MS0522 and MS0523 are above the performance limit established by sec , MMSD Rules.” Communication from MMSD on August 11, 2014: was not “ Your municipality was not one of those that had a newly identified noncompliant metershed.”

Inflow Infiltration Reduction Measures – lateral rehab program, 30 laterals to be lined or replaced per year – ONGOING public storm and sanitary sewer pipe lining program 2011 and forward – provide secondary drainage collection system whenever road is reconstructed

Combined Sewer Service Area East half of the Village Served by Combined sewers Northeast quadrant of the Village also has storm sewers that drain streets north of Capitol Drive – TWO outfalls to the Lake are present.

Combined Sewer Service Area Status New combined sewer resizing and rerouting to improve capacity completed in 2012 Jarvis Street between Lake Drive and Downer Richland Court South of Jarvis Installation of Terrace Drains to accept future connections from downspouts and foundation drains completed: 2012 Downer Avenue project 2014 Murray Avenue project Construction of NEW storm sewer extensions in 2010 and 2012 to expand existing system to SWITCH flows from combined sewers to storm sewers In the North East area, NEW storm sewers moved 15 acres (5% of total area) away from combined sewers and away from basements

Combined Sewer Service Area Status Removal of over 1,000 downspouts from direct connection to combined sewers between 2004 and 2008 Fully third of all downspouts are currently disconnected and do NOT contribute to basement backups Installation of over 250 rain barrels to contain the runoff from the first tenth of an inch of rain Construction of over 50 rain gardens to reduce sewer flows during the first one to two tenths of rain Green Infrastructure Shorewood has been and continues to be a Green Infrastructure (GI) pioneer in the Metro area

Combined Sewer Area Facility Plan Recommendations Recap North side Combined Sewer capacity improvements and rerouting of flows – reduced backup risks Murray, Kensington, Prospect scheduled for 2016 Relief and Protection in the north side of the combined area Protect Basements and Reduce incidence of existing combined sewer bypassing to Lake Michigan

Combined Sewer Area Facility Plan Recommendations Recap South side Storm Sewer construction to relieve combined sewers from almost all street runoff Phase 1 : River outfall construction From Milwaukee River to Prospect along Menlo Large pipes on Murray north of Menlo to Beverly Large pipes on Prospect north of Menlo to Shorewood Blvd. Phase 2 : Storm sewer network construction Multi-year effort to construct storm sewers on nearly every block of every street in the combined area south of Capitol Drive Overland drainage way through River Park to prevent the accumulation of nearly 5 feet of water at Edgewood and Oakland during extreme rain events

Facility Plan Summary: North side Combined Sewer capacity improvement and rerouting viable Remains viable, demonstrated to protect basements South side Storm Sewer construction to relieve combined sewers from almost all street runoff Not evaluated with computer modeling or computations of flow Very expensive Long implementation and benefit timeline Lack of flexibility in adapting to future financial conditions Overland drainage way through River Park to prevent the accumulation of nearly 5 feet of water during extreme rain events viable Remains viable and prudent

Fresh Look by Fresh Eyes at the Combined Area Was Needed Asked MMSD officials for help in more sophisticated analysis Include City of Milwaukee, Milwaukee County, MMSD, UWM Specifically asked the following questions: Does the MMSD pipe accepting flows from Shorewood during heavy rains affect basement backups in Shorewood? Does the operation of the Deep Tunnel during heavy rains affect basement backups in Shorewood? Will MMSD consider any capacity increases in their pipes accepting flows from Shorewood during heavy rains? If Shorewood undertook extensive improvements in its system, would Milwaukee benefit from it? How could the basement backup protection we seek be accomplished for a more reasonable cost and implementation schedule?

MMSD agrees and Commissions a Study by their Consultant CDM/Smith QUESTIONANSWER Does the MMSD pipe accepting flows from Shorewood during heavy rains affect basement backups in Shorewood? Yes, when rains exceed about 2 inches Does the operation of the Deep Tunnel during heavy rains affect basement backups in Shorewood? No, the operation has a negligible effect on Shorewood Will MMSD consider any capacity increases in their pipes accepting flows from Shorewood during heavy rains? No, MMSD is limited by their existing infrastructure to convey, store and treat this flow. If Shorewood undertook extensive improvements in its system, would Milwaukee benefit? Yes, except around the intersection of Hartford and Cramer How could the basement backup protection Shorewood seeks be accomplished for a more reasonable cost and implementation schedule? By adopting a multi- faceted solution rather than the “silver bullet” approach

Multi-Faceted Approach “Multi-Faceted Approach” consists of the following components Combined Sewer Capacity and Rerouting in the north New Storm Sewer Outlet to Milwaukee River Green Infrastructure south of Capitol Drive Street conveyance and restrictors south of Capitol Drive In-home improvements in select locations Backflow preventers Backflow preventers Overhead plumbing Overhead plumbing OPTIONAL / ADDITIONAL BENEFITS OPTIONAL / ADDITIONAL BENEFITS through City of Milwaukee combined sewer rerouting/capacity improvements on Edgewood Avenue

Comparison of Combined Sewer Service Area 2011 FP and the 2014 FP + Milwaukee River Outfall: 2,700 feet of BIG PIPE Additional 25,000 feet of proposed new storm sewers Milwaukee River Outfall: 2,000 feet of BIG PIPE Additional 5,000 feet of proposed new storm sewers Restrictors and Street conveyance

2011 Facility Plan

2014 Facility Plan +

2014 Facility Plan + has a feature from the past

Edgewood Combined Sewers between Maryland and Oakland are shared Combined sewers in Shorewood between Maryland and Oakland receive about 30 percent of their flow from Milwaukee Splitting the Milwaukee and Shorewood flows will benefit both systems by reducing the basement backup risks in each community This is a cooperation opportunity where both communities will achieve significant benefits Overall coordination with MMSD will be necessary.

Facility Plan Cost Update LocationProject(s) Original Estimate OCT 2011 Update MAR 2012 Update March 2015 Update Amount Remaining to be Constructed Basin 1 Storm and sanitary improvements $1.74 million$2.35 million$3.1 million $0 Basin 6 Storm and sanitary improvements $5.50 million$5.38 million$5.61 million $1.9 million Separated Area Sewer pipe lining and lateral rehabs $4.90 million$3.65 million $2.8 million Combined North Combined Sewer upgrades and rerouting $5.22 million$4.11 million$3.7 million $2.75 million Combined SouthStorm Sewer construction$15.05 million $14.32 million$ 34 million Combined South PLUS Storm Sewer construction, street conveyance, GI, restrictors ---$ 14 million

Next Steps and Recommendations For Combined Sewer Area, adopt the new alternatives in the 2014 MMSD Comprehensive Study Consider building sanitary sewers to replace all 95,000 feet of combined sewers. Why wouldn’t we? How long would it take to build it? Update Financial Plan according to alternatives considered Pre-Design Memorandum Approve a Pre-Design Memorandum for 2016, including Environmental Assessment and Water Quality Compliance