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Hopkins – St. Louis Park – Minneapolis Regional Sanitary Sewer Improvements Draft Facility Plan January 20, 2010 Metropolitan Council Public Information.

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Presentation on theme: "Hopkins – St. Louis Park – Minneapolis Regional Sanitary Sewer Improvements Draft Facility Plan January 20, 2010 Metropolitan Council Public Information."— Presentation transcript:

1 Hopkins – St. Louis Park – Minneapolis Regional Sanitary Sewer Improvements Draft Facility Plan January 20, 2010 Metropolitan Council Public Information Meeting

2  Bill Moeller – MCES Assistant General Manager  Bill Cook – MCES Engineering Services Manager  Scott Dentz – MCES Interceptor Engineering Manager  Adam Gordon – MCES Project Manager  Tim O’Donnell – MCES Senior Information Coordinator

3  Bill Lueck – Project Manager, CDM consulting engineers  Jodi Polzin – Project Manager, CDM consulting engineers

4 1. Overview of Regional Wastewater System 2. Overview of Project Facility Plan  Existing Facilities and Conditions  Alternatives  Recommendations and Schedule  Public Participation 3. Question & Answer/Open House

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6 Definitions  Conveyance – Facilities used to move wastewater (includes pumps, pipes and sewers)  Force main – A pressure pipe in which wastewater is conveyed with the use of pumps (pump station)  Gravity sewer – A pipe that is constructed with a continuous drop in elevation to convey flow  Temporary conveyance – A temporary wastewater conveyance pipe typically run above ground and permits the existing pipe to be drained, cleaned, inspected, and repaired  Interceptor – A force main or gravity sewer that intercepts wastewater from multiple communities and conveys it to one of the regional wastewater treatment plants.

7  Increase pumping station capacity to accommodate growth and improve efficiency  Correct known problems  Construct redundant facilities to allow condition assessment and repair

8 Existing System  MCES L27 Pump Station ◦ Constructed in 1971 ◦ Receives all wastewater generated in Hopkins  MCES 7026 Sanitary Force Main ◦ Five mile long force main between L27 and 27 th Street and Humboldt Avenue South in Minneapolis  City Pump Stations ◦ Three pump stations serving nearly 20% of St. Louis Park ◦ One pump station serving an area near Lake of the Isles in Minneapolis

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10 Community Flows CurrentUltimate Average, mgdPeak, mgdAverage, mgdPeak, mgd Hopkins (L-27) St. Louis Park (LS1, LS19, LS2) Minneapolis (L-5) Total

11  The L-27 lift station has reached its useful life expectancy and maintenance issues in conjunction with the need to increase its capacity warrant consideration of replacement.  Age, operating conditions, unknown pipe condition, and previous repairs warrant improvements to force main 7026.

12  Recommend Interceptor Sewer Corridor  Identify Type of Interceptor Sewer Facilities (Pumping/Gravity)  Evaluate Alternative Sites for Pump Station Location  Develop a Plan for Interceptor Sewer Construction Facility Plan Goals

13 1-MN MN-344 To Blue Lake WWTP 1) To Blue Lake WWTP via Force Main  Second Highest Cost  Capacity Reserved for Existing Service Area 3) To 1-MN-341 via Force Main  Insufficient Capacity  Not Considered Further 2) To 1-MN-344 via Force Main  Third Highest Cost

14 Alternative Corridors 1-MN MN-344 To Blue Lake WWTP 4) To 1-MN-330 via Gravity  Highest Cost  Most Disruption  Most Difficult Construction  No Redirection of Local Connections 5) To 1-MN-330 via Force Main  Lowest Cost  Least Disruption  No Redirection of Local Connections

15 AlternativePhase 1Phase 2 1 Rehabilitate existing force main w/ temporary conveyance Construct parallel, redundant force main 2 Construct parallel, redundant force main w/ temporary conveyance Rehabilitate existing force main 3 Construct dual pipe force main w/ temporary conveyance Abandon existing force main

16 Phase I Install 2 New Force Mains Phase I Install New Force Main Phase II Line Portions of Existing Force Main

17 Phase I Construct New Force Main

18 Goals For Minneapolis Segment  Provide short term assurance that the interceptor system is providing reliable service  Replace previously repaired sections of force main  Relocate inaccessible force main  Reline remaining force main  Install a redundant force main

19 Existing Force Main

20 Temporary Conveyance

21 Recommended Plan - Minneapolis Segment: PHASE I New Force Main Rehabilitated Force Main Abandoned Force Main Install New Force Main Reline Remaining Force Main Abandon Force Main

22 Recommended Plan - Minneapolis Segment: PHASE 2 New Force Main Existing Force Main

23 Summary of L27 Site Criteria  Cost Effective  Available Property  Site Compatibility ◦ Land Use ◦ Adjacent Land Use  Environmental Issues ◦ Flood Plain and Wetland Proximity ◦ Environmental Contamination  Recreational Impact  Transportation Disruption

24 L-27 Alternative Sites

25  Lowest Cost for Full Replacement Options  Existing Infrastructure Conveys Hopkins Wastewater to this Location  MCES Currently Owns and Operates Existing Site as a Pump Station L-27 Recommendation: Reconstruct at Existing Location

26 L-27 Replacement

27 City Suggested Site For L-27 Head House Wet Well Tunnel

28 through Minnehaha Creek Minneapolis – Phase L-27 Reconstruction Hopkins/Saint Louis Park – Phase Highway 100 – Phase 1&2 As RequiredHopkins/Saint Louis Park – Phase 2 As RequiredMinneapolis – Phase 2 Project Construction Schedule

29 Lift Station/Force Main SegmentCapital Cost L-27$9,700,000 West Saint Louis Park$14,100,000 Highway 100$4,700,000 East Saint Louis Park$11,100,000 Minneapolis$24,000,000 Total Estimated Cost $63,600,000 The estimated cost includes construction cost, design and administration, land acquisition, and contingencies.

30  Metropolitan Council projects are funded by bonds and Public Facilities Authority Loans, which are paid by regional sewer connection fees & user charges.  One-time increase of $ per unit for new connection to sewer system (SAC)  $1.35 increase per year per household region- wide for 20 years (based on average annual water usage)  No assessment by Metropolitan Council

31  Copies of Draft Facility Plan available for review  Hopkins City Hall  Hopkins Library  St. Louis Park City Hall  St. Louis Park Library  Kenwood Community Center  Metropolitan Council’s Data Center  Three Public Information Meetings  Public Hearing  Comments will be incorporated into the Final Facility Plan.

32  Written comments 02/08/2010 due no later than  Full Metropolitan Council 02/24/2010 Approval  Submit Facility Plan to MPCA 03/01/2010  MPCA Public Notice of EAW to follow Facility Plan Approval Facility Plan Schedule

33  Submit comments no later than February 8,  Submit comments to Tim O’Donnell, MCES Senior Information Coordinator, by:  comments to:  Send written comments to: Tim O’Donnell at Metropolitan Council Environmental Services, 390 Robert Street North, St. Paul, MN  Fax comments to Tim O’Donnell at  Record comments on Metropolitan Council Public Comment Line at  Send TTY comments to Public Comments


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