Request for Proposal - 30- and 42-Inch Force Main Inspection Project Copyright 2014
City of Dubuque Consent Items # 13.
ITEM TITLE: Request for Proposal - 30- and 42-Inch Force Main Inspection Project
SUMMARY: City Manager recommending approval to issue a Request for Proposals to
seek consultants and/or firms to work alongside the City and coordinate
the inspection, emergency response planning and needs assessment for
current and future design changes to the City's 30" and 42" sanitary sewer
force mains located between Cedar Street Lift Station and the Water &
Resource Recovery Center.
SUGGESTED DISPOSITION: Suggested Disposition: Receive and File; Approve
ATTACHMENTS:
Description Type
❑ Sanitary Sewer Force Main RFP-MVM Memo City Manager Memo
❑ Staff Memo Staff Memo
THE CITY OF Dubuque
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Masterpiece on the Mississippi 2007-2012-2013
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: Request for Proposal
30" & 42" Diameter Sanitary Sewer Force Main
Assessment and Rehabilitation Project
DATE: September 16, 2015
City Engineer Gus Psihoyos recommends City Council approval to issue a Request for
Proposals to seek consultants and/or firms to work alongside the City and coordinate
the inspection, emergency response planning and needs assessment for current and
future design changes to the City's 30" and 42" sanitary sewer force mains located
between Cedar Street Lift Station and the Water & Resource Recovery Center.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
Micliael C. Van Milligen
MCVM:jh
Attachment
cc: Barry Lindahl, City Attorney
Cindy Steinhauser, Assistant City Manager
Teri Goodmann, Assistant City Manager
Gus Psihoyos, City Engineer
THE CF Dubuque
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Masterpiece on the Mississippi 2007.2012.2019
TO: Michael C Van Milligen, City Manager
FROM: Gus Psihoyos, City Engineer
DATE: September 15, 2015
RE: Request for Proposal
30" & 42" Diameter Sanitary Sewer Force Main
Assessment and Rehabilitation Project
INTRODUCTION
The purpose of this memorandum is to request authorization to seek proposals from
highly qualified professional consultants and/or firms to work alongside the City and
coordinate the inspection, emergency response planning and needs assessment for
current and future design changes to the City's 30" and 42" sanitary sewer force mains
located between Cedar Street Lift Station and the W&RRC.
BACKGROUND
In general, the force main system is comprised of lift stations and pressure sanitary
sewers known as force mains. Each component of the lift station and force main system
requires periodic evaluation and improvements to continue its vital role in conveying the
City's wastewater. Approximately 80% of wastewater that flows to the Water &
Resource Recovery Center for treatment arrives via the City's Cedar Street and
Terminal Street lift stations through a 30" and 42" force main network, the remaining
20% arrives via the Catfish Creek Lift Station through an 18" force main. The City's
force main system is showing signs of wear and an immediate need to evaluate and
plan for system improvements is necessary. Notably, several sections of the 42" force
main along the banks of the Mississippi River are exposed and need to be further
secured, a sluice gate at Terminal Lift Station requires replacement, and the Terminal
Street valve house needs to be upgraded to ensure flows can be redirected for the
replacement of the sluice gate at Terminal Street lift station.
DISCUSSION
Targeting the immediate needs of the City's 30" and 42" force mains and lift stations at
Cedar and Terminal Streets, we are requesting an extensive assessment of the system.
Force main and lift station evaluation is a specialized field of work that must be
conducted by qualified professional engineers. Therefore, it is necessary to seek out
professionals in force main inspection and lift station evaluations through the City's
Request for Qualification and Proposal process. The following three assessment
phases represent the extent of the services that would be undertaken by the
Engineering firm in order to complete a full assessment:
Phase 1: The professional consultant will conduct the following scope of services
related to the 42" force main between the Terminal Street lift station and the
W&RRC site, and the 30" force main between Cedar Street Lift Station and
Terminal Street Lift Station:
1. Field survey along the banks of the Mississippi River.
2. Force main air release valve evaluation.
3. Wooden pile structural assessment to determine replacement schedule.
4. Work with the City to develop a safety and emergency response planning
document. The document shall address emergency response in the event of a
break in the pipe along the Mississippi River or the need to take the 42" force
main out of service for periodic maintenance.
5. Assist Engineering Department staff to develop design details that provide future
inspection ports along proposed force mains.
6. Complete an on-site inspection of the Cedar Street Lift Station and the Terminal
Street Lift Station in preparation for determining the remaining service life of the
30" and 42" force mains from the Cedar Street Lift Station to W&RRC.
7. Determine the feasibility of redirecting flow for future lift station maintenance
projects, including recommendations on force main layout and valve house
redesign.
8. As part of the assessment, the Consultant will determine if leak detection is
warranted, measure remaining pipe wall thickness, and locate gas
pockets/entrained air and other anomalies. This effort will also identify the need
to add additional access points for future periodic inspections of the force main
as needed.
Phase 2: The professional consultant will conduct the following scope of services
related to the 42" force main between the Terminal Street lift station and the
W&RRC plant site:
1. Design and bid a maintenance project to cover and protect the four locations
where the force main is exposed and tree removal on top of the pipe, including
necessary railroad, Army Corps of Engineers (ACOE) coordination and
permitting.
2. Develop preliminary design that allows the City to take the Terminal Street Lift
Station offline, while continuing to ensure flows from Cedar Street Lift Station
reach the W&RRC. This portion of the project should include valve house
redesign.
Phase 3: The professional consultant will conduct the following scope of services:
1. Terminal Street Lift Station — Conduct condition assessment and develop bid
documents to repair west foundation wall, repair 42" pipe penetration in west
foundation wall, construct flow bypass system, refurbish deteriorated industrial
coatings, and replace magnetic flow meter, gates and SCADA operations.
2. Use the results of the force main service life measurement to develop an annual
preventative maintenance program.
3. Assist the City with importing the collected data into GIS for permanent storage.
Assist in developing GIS data collection tools so annual results of the preventive
maintenance program can be stored.
BUDGET IMPACT
The project is funded through CIP 7102606 Cedar and Terminal Street Force Mains and
Lift Station Assessment and Improvements. The project is phased as it is unknown at
this time as to the final cost of the improvements until after the assessment is
completed. The budget for preliminary engineering services is estimated at $100,000.
The available funding is $250,000, with $150,000 available for immediate construction
needs following any preliminary evaluation needs. Additional funding will most likely be
requested in future budget cycles and will be presented as estimates become available.
REQUESTED ACTION
I respectfully request authorization to seek proposals from qualified professional
consultants to perform the phases described above for the purposes of coordinating
inspections, developing an emergency response plan, and recommending
improvements to the City's 30" and 42" sanitary sewer force mains and Cedar and
Terminal lift stations.
cc: Jonathan Brown, WRRC
Denise Ihrig, Environmental Engineer