Hopkins – St. Louis Park – Minneapolis Regional Sanitary Sewer Improvements

Draft Facility PlanJanuary 20, 2010

Metropolitan CouncilMetropolitan CouncilPublic Information MeetingPublic 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

Bill Lueck – Project Manager, CDM

consulting engineers Jodi Polzin – Project Manager, CDM

consulting engineers

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

St. CroixValley

EaglesPoint

Empire

Anoka

Washington

Hennepin

Carver

Scott

Dakota

Ramsey

Hastings

BlueLake

Metro

Seneca

St. CroixValley

EaglesPoint

Empire

Anoka

Washington

Hennepin

Carver

Scott

Dakota

Ramsey

Hastings

BlueLake

Metro

Seneca

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 SystemExisting 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 27th

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

Current Ultimate

Average, mgd Peak, mgdAverage, mgd Peak, mgd

Hopkins (L-27)

1.6 4.6 2.3 6.3

St. Louis Park(LS1, LS19, LS2)

1.0 3.2 1.4 4.2

Minneapolis(L-5)

0.01 0.04 0.01 0.04

Total 2.6 7.0 3.7 9.3

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, operatingconditions, 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 GoalsFacility Plan Goals

1-MN-330

1-MN-344

To Blue Lake WWTP

1) To Blue Lake WWTP via Force MainSecond Highest CostCapacity Reserved for Existing Service Area

3) To 1-MN-341 via Force Main Insufficient CapacityNot Considered Further

2) To 1-MN-344 via Force MainThird Highest Cost

1-MN-330

1-MN-344

To Blue Lake WWTP

4) To 1-MN-330 via Gravity Highest CostMost DisruptionMost Difficult ConstructionNo Redirection of Local

Connections

5) To 1-MN-330 via Force MainLowest CostLeast DisruptionNo Redirection of Local

Connections

Alternative Phase 1 Phase 2

1Rehabilitate existing force main w/ temporary conveyance

Construct parallel, redundant force main

2Construct parallel, redundant force main w/ temporary conveyance

Rehabilitate existing force main

3Construct 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 II

Line Portions of Existing

Force Main

Phase I

Construct New Force Main

Goals For Minneapolis SegmentGoals 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 MainExisting Force Main

Temporary ConveyanceTemporary Conveyance

Recommended Plan - Minneapolis Segment: PHASE IRecommended 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 2Recommended 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

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

City Suggested Site For L-27City Suggested Site For L-27

Head House

Wet Well

Tunnel

2010 2011 2012 2013 2014

2015 2016 through 2020

2010-2011 Minnehaha Creek

2010-2012 Minneapolis – Phase 1

2011-2014 L-27 Reconstruction

2011-2015 Hopkins/Saint Louis Park – Phase 1

2011-2015 Highway 100 – Phase 1&2

As Required Hopkins/Saint Louis Park – Phase 2

As Required Minneapolis – Phase 2

Project Construction ScheduleProject Construction Schedule

Lift Station/Force Main Segment

Capital 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 $150.01 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 ScheduleFacility Plan Schedule

Submit comments no later than February 8, 2010. Submit comments to Tim O’Donnell, MCES Senior

Information Coordinator, by: Email comments to: data.center@metc.state.mn.us Send written comments to: Tim O’Donnell at

Metropolitan Council Environmental Services, 390 Robert Street North, St. Paul, MN 55101

Fax comments to Tim O’Donnell at 651-602-1477 Record comments on Metropolitan Council Public

Comment Line at 651-602-1500 Send TTY comments to 651-291-0904

Public CommentsPublic Comments