Design of the Twin Ridge Sanitary Sewer Extension ProjectCity of Dubuque
City Council Meeting
Consent Items # 25.
Copyrighted
December 6, 2021
ITEM TITLE: Design of the Twin Ridge Sanitary Sewer Extension Project
SUMMARY: City Manager requesting authorization to release a Request for Proposal
for the Design of the Twin Ridge Sanitary Sewer Extension Project.
SUGGESTED Suggested Disposition: Receive and File; Approve
DISPOSITION:
ATTACHMENTS:
Description Type
RFP for Twin Ridge Sanitary Sewer Extension Project- City Manager Memo
MVM Memo
Staff Memo Staff Memo
THE C
DUj!BQTE
Masterpiece on the Mississippi
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: Design of the Twin Ridge Sanitary Sewer Extension Project
DATE: November 30, 2021
Dubuque
WAWca 914
ii
2007-2012.2013
2017*2019
City Engineer Gus Psihoyos requests City Council authorization to release a Request
for Proposal for the Design of the Twin Ridge Sanitary Sewer Extension Project.
The selected consultant will be expected to complete the contracted scope of work
within a specified timeframe, under the general direction and coordination of the City's
Engineering Department, as authorized by the City Council. The goal is to complete the
engineering design and initiate the public bidding process for construction by July 5,
2022.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
v
Mic ael C. Van Milligen
MCVM:jh
Attachment
cc: Crenna Brumwell, City Attorney
Cori Burbach, Assistant City Manager
Gus Psihoyos, City Engineer
THE CITY OF
DUB E
Masterpiece on the Mississippi
TO: Michael C. Van Milligen, City Manager
FROM: Gus Psihoyos, City Engineer
DATE: November 29, 2021
SUBJECT: Design of the Twin Ridge Sanitary Sewer Extension Project.
Dubuque
All•Merin City
2007-2012.2013
2017*2019
INTRODUCTION
The purpose of this memo is to request authorization to release a request for proposals
(RFP) for the Design of the Twin Ridge Sanitary Sewer Extension Project.
BACKGROUND
Over 60 years ago the City of Dubuque started to invest in sanitary sewer infrastructure
to protect the health of its citizens and to serve the growth that had occurred and was
occurring along its western City limits. The Catfish Creek Interceptor Sewer (CCIS) was
constructed in 1956, which allowed the City to extend sanitary sewers to property
owners within the sewershed. The Catfish Creek Pump Station (CCPS) and Water
Pollution Control Plant, now referred to as Water and Recourse Recovery Center
(WRRC), were constructed in the late 1960's. Since the late 1960's, the community has
grown and expanded to the west. The City has invested in renovations and
replacements at WRRC and CCPS to meet state and federal regulations, and to
adequately serve the expanding community.
In 1998 the City began extending sanitary sewer along Granger Creek to the Dubuque
Technology Park. The Granger Creek Interceptor sewer extension consisted of the
Granger Creek Pump Station and approximately 17,600 feet of both 20-inch and 18-
inch diameter pipe.
The City purchased the privately owned Twin Ridge Subdivision sanitary sewer and
water systems in 2015. The existing sanitary sewer collection system discharges into a
two -cell lagoon, which is also owned and operated by the City. The permit for the
lagoon expires in March of 2024. With no room for expanding the lagoons to meet
current design standards, it will be abandoned and the collection system connected to
the Granger Creek Interceptor sewer.
The City of Dubuque submitted a facility plan to Iowa Department of Natural Resources
(IDNR) in September of this year (2021). It identified three projects related to the
Granger Creek Interceptor Sewer System. One of the three projects is to extend
sanitary sewer to the Twin Ridge Subdivision and abandon the lagoon system.
The facility plan is based on the results of an intensive evaluation of the existing
interceptor collection and pumping systems that transport sewage to the WRRC.
DISCUSSION
The selected consultant will be expected to complete the contracted scope of work
within a specified timeframe, under the general direction and coordination of the City's
Engineering department, as authorized by the City Council. The goal is to complete the
engineering design and initiate the public bidding process for construction by July 5,
2022.
The proposed schedule for the improvement projects is as follows:
RFP Issued:
Proposals Due:
Selection Committee Review
Recommendation to City Manager:
Award Design Contract:
Initiation of Public Bidding:
Bids Due:
Award Construction Contract:
Project Completion
December 7, 2021
December 22, 2021
December 22, 2021 thru December 28, 2021
December 28, 2021
January 3, 2021
July 5, 2022
July 21, 2022
August 1, 2022
December 1, 2023
The following staff members will review the proposals and formulate a recommendation:
1. Todd Irwin, Engineering Technician
2. William O'brien, Water & Resource Recovery Center Manager
3. Deron Muehring, Civil Engineer
4. Steve Sampson Brown, Project Manager
5. Christopher Lester, Water Department Manager
RECOMMENDATION
I recommend releasing an RFP for the Design of the Twin Ridge Sanitary Sewer
Extension Project.
BUDGETIMPACT
The engineering design fee, estimated at $70,000.00, will be funded by a Fiscal Year
2022 appropriation in the amount of $233,500 for the Sanitary Sewer Extensions —
Existing Development, Pre -annexation and Annexation Agreements [CIP# 7101012],
with revenue from an SRF loan.
ACTION TO BE TAKEN
2
I respectfully request authorization to release an RFP for the Design of the Twin Ridge
Sanitary Sewer Extension Project.
Prepared by Todd Irwin, Engineering Technician
cc: Jenny Larson, Budget Director
Gus Psihoyos, City Engineer
William O'brien, Water & Resource Recovery Center Manager
Deron Muehring, Civil Engineer
Steve Sampson Brown, Project Manager
Christopher Lester, Water Department Manager
Todd Irwin, Engineering Technician
3