State Revolving Fund (SRF) Environmental Review - Old Mill Road Pump Station and Force Main Project_InitiateCity of Dubuque
City Council Meeting
Copyrighted
October 4, 2021
Items to be set for Public Hearing # 5.
ITEM TITLE: Request for Public Hearing: State Revolving Fund (SRF) Environmental
Review -Old Mill Road Pump Station and Force Main Project
SUMMARY: City Manager recommending the City Council set a public hearing for
November 15, 2021, on the environmental review as provided by the
State Revolving Fund's Department of Natural Resources, for the Old
Mill Road Pump Station and Force Main project.
RESOLUTION State Revolving Fund (SRF) Loan - Environmental
Review: Old Mill Pump Station and Force Main Project: Preliminary
Approval of an Environmental Review as provided by SRF's Department
of Natural Resources for the Old Mill Pump Station and Force Main
Project and ordering the advertisement for public notice
SUGGESTED Receive and File; Adopt Resolution(s), Set Public Hearing for November
DISPOSITION: 15, 2021 Suggested Disposition:
ATTACHMENTS:
Description Type
Request for Public Hearing State Revolving Fund
(SRF) Environmental Review -Old Mill Road Pump
Station and Force Main Project-MVM Memo
Staff Memo
Resolution
Notice of Hearing
City Manager Memo
Staff Memo
Resolutions
Supporting Documentation
THE CITY OF
Dubuque
DUB TEE
All -America City
Masterpiece on the Mississippi
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TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: Request for Public Hearing
State Revolving Fund (SRF) Environmental Review -Old Mill Road Pump
Station and Force Main Project
DATE: September 29, 2021
City Engineer Gus Psihoyos recommends the City Council set a public hearing for
November 15, 2021, on the environmental review as provided by the State Revolving
Fund's Department of Natural Resources, for the Old Mill Road Pump Station and Force
Main project. The hearing is part of the SRF loan environmental review process and will
allow concerned citizens the opportunity to come forward with any comments or
questions about any potential environmental impact of the proposed project.
Following the public hearing, the City will submit a summary of the public comments and
proof of publication to the environmental review specialist at the SRF program
department, along with an executed Environmental Information Document.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
v
Mic ael C. Van Milligen
MCVM:sv
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: September 20, 2021
Dubuque
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AII•Ameriea City
2007-2012.2013
2017*2019
RE: Request for Public Hearing
State Revolving Fund (SRF) Environmental Review — Old Mill Road Pump
Station and Force Main project
INTRODUCTION
The purpose of this memorandum is to set a date for a public hearing on the
environmental review as provided by SRF's Department of Natural Resources, for the
Old Mill Road Pump Station and Force Main project. The hearing is part of the SRF
loan environmental review process and will allow concerned citizens the opportunity to
come forward with any comments or questions about any potential environmental
impact of the proposed project. The City is required to provide adequate advance
public notification of the public hearing 30 days prior to the hearing meeting federal
requirements of the SRF program. The City will publish a public notice on October 1st,
2021, in the Telegraph Herald, a locally circulated newspaper. In addition, project
documents including design and environmental information related to the proposed
project will be made available for review by the public in advance of the public hearing.
Following the public hearing, the City will submit a summary of the public comments and
proof of publication to the environmental review specialist at the SRF program
department, along with an executed Environmental Information Document.
BACKGROUND
Over 60 years ago the City of Dubuque started to invest in sanitary sewer infrastructure
to serve the west end of Dubuque and to protect the health of its citizens The Catfish
Creek Interceptor Sewer (CCIS) was constructed in 1956, which allowed the City to
extend sanitary sewers to property owners within the sewer shed. The Catfish Creek
Pump Station (CCPS) and Water Pollution Control Plant, now referred to as Water
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 the CCPS to meet State and Federal
regulations and to adequately serve an expanding community. The current
configuration the CCPS was designed with a 25-year planning period. The last upgrade
to the CCPS occurred in 1995, increasing the capacity from 6.5 MGD to 8.0 MGD.
CCPS has reached, and is just beyond, the end of its design planning period of 25
years.
The CCIS, which flows into the CCPS, has not been upgraded since its installation in
1956. In 1959 and again in 1973, two additional interceptor sewers were constructed
that branch off from the CCIS, the Middle Fork CCIS and the South Fork CCIS. All
branches of the CCIS have had multiple extensions since they were first constructed to
serve the West end of the City, including the industrial parks.
In 1998, a fourth sanitary sewer interceptor was constructed along Granger Creek to
serve the Dubuque Technology Park and the Key west Area, south of the City. The
Granger Creek interceptor was extended, in 2015, to serve the Dubuque Regional
Airport and surrounding area. The Granger Creek Interceptor Sewer also connects to
the CCPS through an adjacent smaller pump station, the Granger Creek Pump Station,
which pumps the flow from the lower Granger Creek interceptor up to CCPS.
The expansion of the tributary area that has occurred, within the City limits, since the
construction of the CCIS and CCPS, is upwards of 9,100 acres. City Staff analyzed the
growth that has occurred over just the last 20 years, within the tributary area of the
CCPS, and applied design flow rates to the growth areas. The calculated additional
flow, due to growth, over the last 20 years is approximately 6.5-7 MGD. When combined
with the average dry weather flow of 1.7 MGD, from the upgrade 25 years ago, the
increase is slightly beyond the design flow anticipated with last upgrade. Today's
average daily dry weather flow ranges from 3.2 to 3.5 MGD. During wet weather events
City staff need to deploy a temporary pump and force main capable of pumping
approximately 2.8 MGD, from the CCPS to the WRRC. The temporary pumping system
conveys the additional peak flow to WRRC and minimizes SSO's at CCPS. The
additional peak flow is attributable to growth, allowable Infiltration and inflow (I&I) within
the tributary area, and I&I due to the age of the CCIS pipes upstream of CCPS. During
these peak flow events, surcharging of the pipes does occur. Surcharging within the
system has been observed and is reflected in sewer modeling reports. The intercepting
sewers up -stream of the CCPS include close to 100,265 feet of sewer (approximately
19 miles) with pipe diameters ranging in size from 8 to 30 inches in diameter.
Due to ongoing development within the CCIS tributary area, the City hired Strand
Associates, Inc. (Strand) in late 2018 to develop a better understanding of the hydraulic
capacity of the CCIS. Both existing dry and wet weather flows were of interest, as well
as potential future conditions. The analysis of the CCIS and the CCPS involved the
implementation of a flow metering program in the spring and summer of 2019 and the
building of a computer model calibrated to actual measured flows to better understand
the existing flow and existing capacity within the system. The computer model was
created using XP-SWMM which is based on the EPA's SWMM model.
In November 2020, the City asked Strand to further assess what impact a "wet industry"
may have on the system, namely the Southfork Interceptor, downstream sections of
CCIS and CCPS. The results of the more focused review were that the existing system
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could handle the additional dry weather flow from the industry but indicated potential
capacity issues for further development within the tributary area.
City staff and Strand worked to develop several alternatives for upgrading the CCIS and
CCPS. Evaluations of the alternatives for; performance of the CCIS system, ability to
provide adequate service for existing development and future growth, initial cost and
long-term operating costs were considered. A long-term approach was selected that
involves several upgrades that can be accomplished over time. The result of this
approach will be an upgraded gravity sewer system and pump stations that will be
adequately sized to serve the city now for a planning period of 30 to 50 years. This
approach initially builds capacity into the pumping systems to be able to convey the
existing peak flow to WRRC, then builds capacity into the gravity interceptor sewers
though the upsizing of the piping. There are six steps necessary to complete the
upgrade to the Catfish Creek Interceptor Sewer System. This approach is flexible such
that the steps presented below can be combined or broken down into multiple smaller
projects to accommodate funding availability.
1. Construct Old Mill Road Lift station with an initial firm pumping capacity of
20 MGD and a full build out capacity of 30 MGD. This removes
approximately 80% of the flow from passing through the CCPS and pumps
it directly to WRRC. This step also increases the overall peak pumping
capacity from 8 MGD to 28 MGD.
2. Reconstruct and upsize the Southfork Interceptor sewer to increase
capacity to be able to convey the existing and future peak flows to the new
pump station that the Southfork Interceptor sewer serves, including the
existing DICW South Industrial Park and the growth areas along the
Southwest Arterial Corridor.
3. Reconstruct and upsize the Catfish Creek Interceptor from Old Mill Road
pumping station to a point just south of Brunskill Road, where the North
Fork Catfish Creek Interceptor and Middle Fork Catfish Creek Interceptors
converge. Increasing this section of interceptor sewer will allow the sewer
to properly convey the combined flow to Old Mill Road Pumping Station,
eliminate surcharging of the system and prevent SSO's in the lower
section of the CCIS. Also, this step would include the rehabilitation of the
lowest section of this interceptor, through lining, to prevent I&I entering the
pipe. The lowest section of the CCIS is planned to be utilized as a bypass
for the Proposed Old Mill Road Pumping Station, during routine cleaning
and during an emergency event. During extreme wet weather peak flow
events, this redundancy will provide the means necessary to convey the
excess flow to CCPS and provide the City with 28 MGD of emergency
pumping capacity, approximately three- and one-half times the capacity of
the existing CCPS.
3
4. Reconstruct and upsize the Middle Fork CCIS to increase
capacity for a portion of the west end of Dubuque, DICW Industrial
Park along Chavenelle, the Graf Farm Industrial area, and the growth
areas to the west.
5. Reconstruct and upsize the North Fork CCIS from a point
just south of Brunskill Road, where the North Fork Catfish Creek
interceptor and Middle Fork catfish Creek Interceptor converge, to the
intersection of University Avenue and Dodge Street.
6. Modify the existing CCPS to receive flow directly from the Granger Creek
Interceptor and abandon the small Granger Creek Lift Station. This will
provide increased pumping capacity for the growth area along the U.S.
151/61 Corridor (sewer shed 4) with an 8 MGD Pumping Station dedicated
to serve that growth area into the future.
DISCUSSION
In May of 2021 City staff began work to develop a facility plan and Intended Use Plan
(IUP) application for submission to Iowa Department of Natural Resources (IDNR) State
Revolving Loan Fund (SRF), for the first of the steps laid out above. The Facility Plan
for the Old Mill Road Pump Station was submitted on May 26, 2021 and was accepted
for the 2nd quarter IUP. Information and technical data, from the Strand report, was
used to further develop the concept and preliminary design that was included in the
facility plan.
This project will be constructed almost entirely with in the 100-year flood plain. The
pumping station itself is located at the very edge of the flood plain boundary and will be
constructed with the main level of the structure 2 ft above the 100-year flood elevation.
The dual force mains will, however, be crossing the flood plain and Catfish Creek in two
locations. The construction within the flood plain and the creek crossings require the
City to submit a joint application, for a construction permit, for all work within the flood
plain to IDNR and the Army Corps of Engineers (USACE). City Staff submitted this
application on September 14, 2021.
IDNR staff have submitted a work order request to the office of the State Archeologist.
They are hoping that this portion of the environmental clearance can be scheduled and
completed this fall. City Staff have not received verification of the final schedule for
when this site investigation will take place.
Since submitting the facility plan, in May, Strand has continued to refine the design and
has recently submitted their 30% design report, Basis of Design, to City staff. The Basis
of Design report will be sent to IDNR as a supplement to the Facility Plan.
The environmental review public hearing is part of the SRF loan environmental review
process and will allow concerned citizens the opportunity to come forward with any
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comments or questions about any potential environmental impact of the proposed
project.
REQUESTED ACTION
I respectfully request that the City Council establish November 15, 2021, as the date for
the public hearing and prepare a transcript, recording, or other complete record of the
hearing and make it available for public review.
cc: Jenny Larson, Budget Director
William O'brien, WRRC Plant Manager
Bob Schiesl, Assistant City Engineer
Deron Muehring, Civil Engineer
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Prepared by Gus Psihovos City of Dubuque Engineering 50 W 13th St Dubuque IA 52001 (563)589 4270
Return to Adrienne N. Breitfelder City Clerk City of Dubuque, 50 W. 13th St. Dubuque, IA 52001 (563)589-4100
RESOLUTION NO. 344-21
STATE REVOLVING FUND (SRF) LOAN - ENVIRONMENTAL REVIEW
OLD MILL PUMP STATION AND FORCE MAIN PROJECT
PRELIMINARY APPROVAL OF AN ENVIRONMENTAL REVIEW AS
PROVIDED BY SRF'S DEPARTMENT OF NATURAL RESOURCES FOR THE
OLD MILL PUMP STATION AND FORCE MAIN PROJECT AND ORDERING
THE ADVERTISEMENT FOR PUBLIC NOTICE
Whereas, In May of 2021 the City submitted a facility plan and State
Revolving Fund (SRF) loan application documents to Iowa Department of Natural
Resources (IDNR) to secure funding for the Old Mill Road Pumping Station and
Force Main Project; and;
Whereas, the City is required to complete an environmental review through
public hearing as part of the SRF environmental review process.
NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE
CITY OF DUBUQUE, IOWA:
Section 1. The environmental review as provided by SRF's Department of
Natural Resources for the Old Mill Pump Station and Force Main project, is
hereby preliminarily approved and ordered filed in the office of the City Clerk for
public inspection.
Section 2. A public hearing will be held on the 151h day of November, 2021,
at 6:30 p.m. in the Historic Federal Building Council Chambers (and/or by virtual
means) 350 W. 6th Street, Dubuque, Iowa, at which time interested persons may
appear and be heard for or against the proposed environmental review 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
environmental review of the Project.
Section 3. The environmental review as provided by SRF's Department of
Natural Resources for the Old Mill Pumping Station and Force Main Project is
hereby ordered to be advertised for public hearing.
Passed, adopted and approved this 4th day of October 2021.
c
Roy D. Buol, Mayor
Attest:
A4,e-�
Adrienne N. Breitfelder, City Clerk
NOTICE OF PUBLIC HEARING ON ENVIRONMENTAL REVIEW PROVIDED BY
STATE REVOLVING FUNDS (SRF) DEPARTMENT OF NATURAL RESOURCES
FOR THE OLD MILL PUMP STATION AND FORCE MAIN PROJECT AND
ORDERING THE ADVERTISEMENT FOR PUBLIC NOTICE
NOTICE IS HEREBY GIVEN: The City Council of the City of Dubuque, Iowa will
hold a public hearing on the environmental review as provided by State Revolving
Funds (SRF) Department of Natural Resources for the Old Mill Pump Station and Force
Main Project, in accordance with the provisions of Chapter 26, Code of Iowa at 6:30
p.m. on the 15th day of November, 2020 in the Historic Federal Building Council
Chambers, (and/or by virtual means) 350 West 6th Street, Dubuque, Iowa. Said
environmental review is now on file in the office of the City Clerk, 50 W. 13th Street,
Dubuque, Iowa. At said hearing any interested person may appear and file objections
thereto.
Written comments regarding the above public hearing may be submitted to the
City Clerk's Office, City Hall, 50 W. 13th Street, on or before said time of public hearing.
Any visual or hearing -impaired persons needing special assistance or persons
with special accessibility needs should contact the City Clerk's office at (563)589-4100
or TDD at (563)690-6678 at least 48 hours prior to the meeting.
Published by order of the City Council given on the 4th day of October 2021.
Adrienne N. Breitfelder, City Clerk