Lake Orion

Action Item

SAW Asset Management Plan Presentation by WRC & HRC


Department:Village CouncilSponsors:


BACKGROUND BRIEF:              The Oakland County Water Resource Commission (WRC) and Hubbell, Roth & Clark (HRC) Engineers, will be presenting the SAW Asset Management Plan for the sanitary sewer system of the Village. 




FINANCIAL IMPACT:             





Meeting History

Oct 22, 2018 7:30 PM  Village Council Regular Meeting
draft Draft

Sally Duffy, Senior Project Engineer - Asset Management Department HRC and Karyn Stickel, Associate - Asset Management Department HRC, provided an overview of the SAW Grant including the following;

· Project Background

§ December 2013: Village applied for a grant to prepare an asset management plan for the sanitary sewer system, which was awarded in October 2015.

§ November 2018: All grant work must be completed

§ Grant Award: $663,300

§ Grant amount: $596,970

§ Village match: $66,300

· Objectives

§ Develop a comprehensive Asset Management Plan for the Sanitary Sewer System including

§ Asset inventory and condition assessment

§ Level of service

§ Criticality of assets

§ Operation and maintenance strategies

§ Long term funding/capital improvement planning

· Work Completed to Date

§ GIS Mapping Updates

§ Sanitary Sewer Televising: Televised 60,000 lft. and Ice jigged 2 force mains

§ Structural Concerns

§ 0-5 year CIP: Break(s) and large joints offset require prompt and immediate concern for potential pipe failure within the next 5 years

§ 5-10 year CIP: Fracture(s) multiple crack(s) hinge, etc. which could deteriorate in 5 to 10 years; defects are an immediate concern for pipe failure

§ Infiltration Concerns

§ 0-5 year CIP:

· Infiltration gusher(s)

· Water entering pipe “Under pressure” through joint or defect

§ 5-10 year CIP

· Infiltration runner(s)

· Continuous water flow into pipe through joint to defect.

§ Manhole Inspections & CIP:

§ Inspected 346 manholes:

· 288 in good condition

· 51 in fair condition

· Total estimated repair cost is $25,000

§ Sanitary Sewer CIP

§ Mostly trenchless repairs

· Full length lining

· Spot lining

· Grouting

§ Minimal excavation required repairs

· Point repairs

· Open cut

§ Costs

· 0-5 year CIP Costs - $204,000

· 5-10 year CIP Costs - $277,000

§ Pump Station Inspections

§ Inspected 16 Village owned pump stations; several different types of stations

· 12 Ejectors found to be in fair overall condition

o Intensive maintenance of the equipment has extended the useful life of the stations

o Maintenance and emergency repair costs for equipment beyond its useful life will continue to increase significantly

· Four Centrifugal Stations

· Completed ultrasound testing of structures

· Stations were installed in 1971

o Typical useful life of most mechanical/electrical equipment is about 20 years

o Equipment replaced as it fails, but some is obsolete and no parts are available

o No major investment in almost 50 years

§ Pump Station Capital Improvements

· Replace pumps, valves, compressors, etc.

· Replace electrical controls, instrumentation and update SCADA

· Corrosion protection and rehab of structures

· Replace the force mains under the lake

· Limited access increases costs

· Move from reactive (emergency) replacements of failed equipment to preventive replacement

§ Costs and Financing

§ Current WRC O & M budget is $300,000/year. This does not include GLWA charges or Village administration

§ Major Maintenance and Capital Improvement Fund is $94,000/year. The current rates could be utilized to complete the manhole repairs ($25,000) and the sewer CIP ($481,000 over 10 years)

§ Pump Station CIP ($6,048,000) would require different funding source

· Current WRC rate component is not sufficient to complete pump station upgrades

· Current AAA government bond rate of 3.308% for 20 year bond would result in an annual debt service payment of $418,000/year

· Utilizing the SRF rate of 2% for 20 years, the annual debt service payment would be $370,000/year

§ Sanitary Sewer Model: a model of the system was developed to determine areas of flow restrictions. During a 25-year, 1 hour storm event, the Lake Orion SDS an downstream Clinton-Oakland interceptor operates below capacity

§ FOG (Fats, Oil and Grease) Ordinance Review: Reviewed ordinance and made recommendations for public education

· Costs to Date: Total Grant: $663,300; Spent as of January 30, 2018 - $397,008; remaining grant: $266,292

· Final Steps

§ Condition Assessment: finish last 14 runs of sanitary sewer cleaning and televising

§ Capital Improvement Planning

§ Update Sanitary Sewer CIP, if necessary

§ Complete pump station and capital improvement plan

§ Finalize Report and MDEQ Deliverables

Council Members discussed the following:

§ New manhole locations

§ Infiltration - should it be taken care of immediately or wait. Cracks that offset joints do not affective the operations. Need to look if it will continue and at what point do you dig it up and address it.

§ Ice Picking: two forced lasers under the lake; HRC is currently waiting for the final report

§ Difference between two types of pump stations: Ejectors are for low flow areas and the other pumps are used for areas with more homes.

§ Updated Site Plan: pulled historical easements and tried to draw plans. Data from 1970 has many cottages. Need to identify access routes. In the past these routes were accessible; that has changed now.