CITY OF MINNEAPOLIS

Central City Storm Tunnel

Katrina Kessler, P.E. Surface Water and Sewers Division Director

Public Works

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June 8, 2017

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Minneapolis Storm Tunnel Locations

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Buildings Served by Central City Tunnel Hennepin County Government Center Target Corporate Headquarters US Bancorp Center Foshay Tower IDS Center Capella Tower Wells Fargo Center US Bank Plaza RBS Plaza Cowles Center for Dance and the Performing Arts

Xcel Energy Minneapolis Central Library Minnesota Orchestra Hall U.S. Courthouse, Minneapolis Building Marquette Plaza Valspar Corporate Campus WCCO – CBS Oracle Marriot City Center Orpheum Theater Ameriprise Financial Corporate Headquarters

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Minneapolis Stormwater System

Aging Infrastructure Challenge

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Minnesota Historical Society 6/15/1883

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Pressurized Tunnels

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Pressurized Tunnels

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Pressurized Tunnels

• Majority of tunnels operate in a pressurized state.

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Tunnel Rehab

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Central City Project • Prioritized in 2011 comprehensive assessment • Rehab/rebuild 3.9 miles of downstream tunnel

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Central City Project • Feasibility study expected July 2017 followed by

design, construction 2020 – 2023 • Estimated price $38 million • Proposed stormwater utility rate increases

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Land Use Property Example 2017 2023

Residential Single family $12.36 $14.79

Church Bethlehem Lutheran $571.90 $707.57

Hospital Abbott Northwestern $3,171.21 $3,923.54

Industrial/Commercial United Parcel Service $5,817.23 $7,197.29

Retail Calhoun Square $1,854.65 $2,294.64

Apartment 2514 Park Ave $298.86 $369.76

Questions?

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