Presentation on theme: "Hopkins – St. Louis Park – Minneapolis Regional Sanitary Sewer Improvements Draft Facility Plan January 20, 2010 Metropolitan Council Public Information."— Presentation transcript:
Hopkins – St. Louis Park – Minneapolis Regional Sanitary Sewer Improvements Draft Facility Plan January 20, 2010 Metropolitan Council Public Information Meeting
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
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
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.
Increase pumping station capacity to accommodate growth and improve efficiency Correct known problems Construct redundant facilities to allow condition assessment and repair
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
Community Flows CurrentUltimate Average, mgdPeak, mgdAverage, mgdPeak, mgd Hopkins (L-27) St. Louis Park (LS1, LS19, LS2) Minneapolis (L-5) Total
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.
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
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
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
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
Phase I Install 2 New Force Mains Phase I Install New Force Main Phase II Line Portions of Existing Force Main
Phase I Construct New Force Main
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
Existing Force Main
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
Recommended Plan - Minneapolis Segment: PHASE 2 New Force Main Existing Force Main
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
L-27 Alternative Sites
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
City Suggested Site For L-27 Head House Wet Well Tunnel
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
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.
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
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.
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
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