Kerper Blvd. Sanitary Sewer Reconstruction Project Initiate Copyrighted
October 15, 2018
City of Dubuque Items to be set for Public Hearing # 1.
ITEM TITLE: Kerper Blvd. Sanitary Sewer Reconstruction Project Initiate
SUMMARY: City Manager recommending preliminary approval of the
construction plans and specifications and authorize the
public bidding procedure for the Kerper Blvd. Sanitary
Sewer Reconstruction Project. It is further recommended
that a public hearing be set for November 5, 2018.
RESOLUTION Kerper Blvd. Sanitary Sewer
Reconstruction
SUGGESTED DISPOSITION: Suggested Disposition: Receive and File; Adopt
Resolution(s), Set Public Hearing for November 5,2018
ATTACHMENTS:
Description Type
Kerper Bl�rl Sanitary Sewer Reconstruction-MVM City Manager Memo
Memo
Staff Memo Staff Memo
Resolution Resolutions
THE CITY OF Dubuque
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TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: Kerper Blvd. Sanitary Sewer Reconstruction
CIP 7102663
DATE: October 9, 2018
City Engineer Gus Psihoyos recommends the City Council give preliminary approval of
the construction plans and specifications, and authorize the public bidding procedure for
the Kerper Blvd. Sanitary Sewer Reconstruction Project. It is further recommended that
a public hearing be set for November 5, 2018.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
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Mic ael C. Van Milligen �� �
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Attachment
cc: Crenna Brumwell, City Attorney
Teri Goodmann, Assistant City Manager
Cori Burbach, Assistant City Manager
Gus Psihoyos, City Engineer
John Klostermann, Public Works Director
Randy Gehl, Public Information Officer
Todd Irwin, Engineering Tech
THE CITY OF Dubuque
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TO: Michael C. Van Milligen, City Manager
FROM: Gus Psihoyos, City Engir�eer
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DATE: October 8, 2018
SUBJECT: Kerper Blvd. Sanitary Sewer Reconstruction
CIP 7102663
INTRODUCTION
The enclosed resolutions authorize the public bidding procedure for the Kerper Blvd.
Sanitary Sewer Reconstruction.
BACKGROUND
The City experienced a significant sanitary sewer overFlow in August 2015 in a heavy
industrial area along Kerper Boulevard. The overflow prompted an extensive investigation
as to how and why the overflow occurred. The investigation by City staff found the overflow
had occurred due to premature weakening of the sanitary sewer. The failed section of
sanitary sewer was located throuc�h a 66-inch diame#er storm sewer which allowed
wastewater to enter the storm sewer. An emergency repair was conducted; along with
heavy cleaning of the sanitary sewer. During heavy cleaning operation of the Kerper
Boulevard and the East 16th Street sanitary sewers, significant offset pipe joints and
additional corroded pipe section were discovered. During the pipe cleaning operations, the
cleaning equipment was lodged in the ductile iron pipe. A second emergency excavation
was conducted to retrieve the equipment. Due to the condition of the existing ductile iron
pipe only a temporary repair could be made. A permanent repair was not feasible as pipe
corrosion presented difficulties in securing the repair couplings. Since there are so many
locations where corrosion has affected the pipe, along this section of Kerper Blvd., it is being
recommended that full replacement and relocation of the sanitary sewer be made.
While sections of the collection system along Kerper Boulevard are in fair to good condition,
approximately 2,400 feet of 18-inch diameter ductile iron sanitary sewer is at risk between
Fengler Street and East 16t" Street. Additionally, approximately 1,800 feet of 18-inch
diameter vitrified clay sanitary sewer along East 16t" Street is distressed and in need of
replacement to eliminate I&I issues due to settlements. Additionally, the 18-inch vitrified clay
pipe is under sized to serve the current level of development. The 18-inch ductile iron pipe,
along Kerper Boulevard, was installed in 1994 and the 18-inch vitrified clay pipe, along East
16th Street, was installed in 1957.
The reason for the premature failure of the ductile iron pipe is unclear, however, following
several attempts to clean, televise, and repair the sewer it was discovered that the pipe wall
thickness is severely compromised. Further, the existing manholes show signs of sulfuric
acid attack and the section of pipe removed during the repair made in August of 2015
showed signs of extensive corrosion. Many reasons are known as to how hydrogen sulfide
can develop in a system such as low pH in the wastewater and reduced velocity or
increased retention time of wastewater in the collection system.
Engineering staff have identified several different issues with the Kerper Blvd. sanitary
sewer and investigated different options for the replacement of the sewer. Staff selected
one of the options and issued the design for bidding in May of 2017. The estimated
construction cost of the project was $3,762,675.00. Two Bids were received on June 8,
2017, for the Kerper Blvd, Sanitary Sewer Reconstruction project. The bids were
substantially over the estimated construction cost with a low bid of$5,494,539.26, both bids
were rejected.
DISCUSSION
Engineering staff re-evaluated the design for cost saving measures and developed three
additional design alternatives for consideration. The selected alternative is for full
replacement of the failed gravity sewer system, on Kerper Boulevard, with a combination of
a force main and gravity system. The new alignment will start at an existing manhole,
connected to a 24-inch diameter sanitary sewer with sufficient capacity to accept flows from
the Kerper Boulevard service area. Approximately 2/3 of the project will be able to be
constructed within public right-of-way, the remaining 1/3 will be constructed on easements
across private property.
The selected alternative reduces estimated construction costs and impact to businesses and
traffic along E. 16�h Street, near Kerper Blvd. This was achieved by modifying the previous
alignment and utilizing a single lift station and force main. The modified alignment is located
along the U.S. Highway 151/61 corridor, between E. 16�h Street and Kerper Blvd. The single
lift station allows for a much shallower pipe installation and avoids the need for dewatering
and specialized trench shoring for that portion of the project. This alignment modification
also eliminated the majority of pavement replacement costs on E. 16�h Street and at the
intersection with Kerper Blvd. This change in alignment also avoids the need to close the
U.S. Highway 151/61 ramps, at Kerper Blvd., and virtually eliminates the access impact to
businesses along E. 16�h Street.
Additionally, the new project scope eliminates the costs associated with the replacement of
the 1950's era sanitary sewer along East 16�h Street. Currently the existing sewer is
undersized for the area that it serves. The modified alignment eliminates the Kerper Blvd.
sanitary sewer flow from entering the existing undersized sanitary sewer on E. 16�h Street.
The elimination of the Kerper sanitary sewer flow, from the E. 16�h Street sanitary sewer,
also has the potential to reduce future sewer replacement costs. The existing sewer, on E.
16�h Street, could be replaced with a smaller diameter pipe and at a reduced depth.
2
In late July, Engineering staff revised the previously submitted and approved facility plan to
reflect the revised concept. The estimated cost of$3,774,954.70, for the revised concept,
was also included as part of the amended facility plan. The lowa Department of Natural
Resources (IDNR) have reviewed and approved the amended facility plan so that the City
can apply for a SRF loan to cover construction and contingency cost. The Engineering and
design costs will be paid by the sanitary construction fund.
The final design was completed the week of October 1 S�, along with a construction cost
estimate based on the completed design. The final construction cost estimate including, a
contingency of$389,415.00 is $4,283,567.31 , which is $508,612.61 more than what was
submitted with the facility plan, in July, and $1 ,083,567.00 more than the previously
approved Intended Use Plan (IUP).
The plans, specifications, revised estimate and an amended IUP application were
submitted, to IDNR, for approval and construction permitting on October 4.
PROJECT SCHEDULE
The schedule for the project is as follows:
Initiate Public Bidding Process October 15, 2018
Publish Notice to Bidders, Advertise for Bids October 17, 2018
Publish Public Hearing Notice on Plans & Specifications October 19, 2018
Public Hearing on Plans & Specifications November 5, 2018
Receipt of Bid Proposals (Bid-Letting) November 8, 2018
Award Construction Contract November 19, 2018
Final Project Completion Date July 1 , 2019
The award of the Contract may be delayed pending approval from the lowa Financing
Authority (IAF) and lowa Department of Natural Resources (IDNR) construction permit.
RECOMMENDATION
I recommend that the City Council establish a date for the public hearing and authorize the
City Clerk to advertise for proposals.
BUDGETIMPACT
The estimate of probable cost for the Kerper Blvd. Sanitary Sewer Reconstruction is
summarized as follows:
Descri tion Estimate
Construction Contract $ 3,894,152.10
Emer enc Costs, Plannin & Desi n 469,822.00
Contingency 389,415.21
Contract Admin / Construction En ineerin 214,178.00
Total Project Cost S 4.967.567.31
3
The design and Engineer's estimate includes several items that can be eliminated from the
project that would allow the project to be within the budgeted amount. The identified items
would reduce future maintenance and cleaning costs of the Fengler Street lift station. The
estimated reduction in construction costs, of not including these items, is estimated to be
approximately $342,675.00.
The funding summary for the Kerper Blvd. Sanitary Sewer Reconstruction is as follows:
CIP Fundin Source Amount
7102663 Kerper Blvd Sanitary Sewer Reconstruction $ 4,308,300.00
State of lowa, Revolvin Loan Fund
7102663 Kerper Blvd Sanitary Sewer (Construction, $ 684,000.00
Desi n, Administration & Ins ection
Total Project Funding 4.992.300.00
ACTION TO BE TAKEN
I respectfully request that the City Council grant preliminary approval to the construction
plans and specifications; and establish November 5, 2018 as the date of the public hearing;
and hereby authorized the City Clerk to advertise for bid proposals for the Kerper Blvd.
Sanitary Sewer Reconstruction through the adoption of the enclosed resolutions.
Prepared by Todd Irwin, Engineering Technician
cc: Jenny Larson, Budget Director
John Klostermann, PW Director
Deron Muehring, Civil Engineer
4
RESOLUTION NO. 310-18
KERPER BLVD. SANITARY SEWER RECONSTRUCTION
NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF
DUBUQUE, IOWA:
The proposed plans, specifications, form of contract and estimated cost for the
Kerper Blvd. Sanitary Sewer Reconstruction in the estimated amount $3,894,152.10,
are hereby preliminarily approved and ordered filed in the office of the City Clerk for
public inspection.
A public hearing will be held on the 5th day of November 2018, at 6:00 p.m. in the
Historic Federal Building Council Chambers (second floor) 350 W. 6th Street, Dubuque,
Iowa, at which time interested persons may appear and be heard for or against the
proposed plans and specifications, form of contract and estimated cost of said Project,
and the City Clerk be and is hereby directed to cause the attached notice of the time
and place of such hearing to be published in a newspaper having general circulation in
the City of Dubuque, Iowa, which notice shall be published not less than four days nor
more than twenty days prior to the date of such hearing. At the hearing, any interested
person may appear and file objections to the proposed plans, specifications, form of
contract, or estimated cost of the Project.
The Kerper Blvd. Sanitary Sewer Reconstruction is hereby ordered to be advertised
for bids for construction.
The amount of the security to accompany each bid shall be in an amount which shall
conform to the provisions of the Notice to Bidders hereby approved.
The City Clerk is hereby directed to advertise for bids for the construction of the
improvements herein provided, by publishing the Notice to Bidders to be published on
the City of Dubuque website and a contractor plan room service with statewide
circulation, which notice shall be published not Tess than thirteen but not more than
forty-five days before the date for filing bids before 2:00 p.m. on the 8th day of
November 2018. Bids shall be opened and read by the City Clerk at said time and will
be submitted to the City Council for final action at 6:00 p.m. on the 19th day of
November 2018, in the Historic Federal Building Council Chambers (second floor), 350
West 6th Street, Dubuque, Iowa.
Passed, adopted and approved this the 15th day of October 2018.
Attest:
Kevi . Firnstahl, CMC, City Clerk
oy D. Buol, Mayor
CITY OF DUBUQUE, IOWA
OFFICIAL NOTICE
NOTICE OF PUBLIC HEARING ON PLANS, SPECIFICATIONS, FORM OF
CONTRACT, AND ESTIMATED COST FOR KERPER BLVD. SANITARY SEWER
RECONSTRUCTION
NOTICE IS HEREBY GIVEN: The City Council of the City of Dubuque, Iowa will hold a
public hearing on the proposed plans, specifications, form of contract and estimated
cost for the Kerper Blvd. Sanitary Sewer Reconstruction, in accordance with the
provisions of Chapter 26, Code of Iowa, at 6:00 p.m., on the 5th day of November, 2018,
in the Historic Federal Building Council Chambers (second floor), 350 West 6th Street,
Dubuque, Iowa. Said proposed plans, specifications, form of contract and estimated
cost are now on file in the office of the City Clerk, 50 W. 13th St., Dubuque, Iowa.
The scope of the Project is as follows:
The Kerper Blvd. sanitary sewer reconstruction project begins at the
intersection of Sycamore St. and E. 16th St. A new 24" PVC gravity
sanitary sewer will be extended along the south side of E. 16th St., to the
U.S. highway 151/61 overpass. Dual 10" PVC force mains will be
constructed adjacent to the U.S. Highway 151/61 Right -of -Way., from E.
16th St. to Kerper Blvd. A 4.1 mg/d lift station and appurtenances will be
constructed adjacent to the Kerper Blvd. Right -of -Way and U.S. Highway
151/61 Right -of -Way. A new 18" PVC gravity sanitary sewer will be
constructed from the lift station to the intersection of Fengler St. and
Kerper Blvd. The gravity main will be constructed in the southbound lanes
of Kerper Blvd. A portion of the existing 10" DIP sanitary sewer on Kerper
Ct. will be redirected south, to the new lift station. Portions of the existing
18" DIP sanitary sewer and manholes will be abandoned in place.
The project consists of approximately; 520 LF of 24" PVC and 1,677 LF of
18" PVC gravity sewer, 1.715 LF of dual 10" PVC force mains, 12
manholes, (1) Lift stations, 1,390 Sy of PCC pavement, 3,800 Sy ACC
pavement, staged construction and traffic control, and dewatering.
Copies of supporting documents for the public hearings are on file in the City Clerk's
Office, City Hall, 50 W. 13th St., Dubuque, Iowa, and may be viewed during normal
working hours.
Written comments regarding the above public hearings may be submitted to the City
Clerk's Office, 50 W. 13th St., on or before said time of public hearing. At said time and
place of public hearings all interested citizens and parties will be given an opportunity to
be heard for or against said proposal.
Any visual- or hearing-impaired persons needing special assistance or persons with
special accessibility needs should contact the City Clerk's office at (563) 589-4120 or
TDD at (563) 690-6678 at least 48 hours prior to the meeting.
Published by order of the City Council given on the 15th day of October 2018.
Kevin S. Firnstahl, CMC, City Clerk