Consent Decree Semi Annual Report_March 2014Masterpiece on the Mississippi
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: March 31st Semi Annual Report
US EPA Consent Decree Required Submittal
DATE: February 21, 2014
Dubuque
band
AI- America City
IIIii!
2007 • 2012 • 2013
City Engineer Gus Psihoyos recommends City Council approval for the City Manager to
certify the March 31st Semi Annual Consent Decree Report to be submitted to the U.S.
Department of Justice, U.S. EPA and the Iowa Department of Natural Resources.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
Mic ael C. Van Milligen
MCVM:sv
Attachment
cc: Barry Lindahl, City Attorney
Cindy Steinhauser, Assistant City Manager
Teri Goodmann, Assistant City Manager
Gus Psihoyos, City Engineer
Masterpiece on the Mississippi
TO:
FROM:
SUBJECT:
DATE:
Michael C. Van Milligen, City Manager
Gus Psihoyos, City Engineer
March 31 Semi Annual Report
US EPA Consent Decree Required Submittal
February 20, 2014
Dubuque
l-Am a cnr
'AI I,
2007 • 2012 • 2013
Introduction
The purpose of this memorandum is to request City Council approval to authorize the
City Manager to certify and submit to the appropriate parties, the City of Dubuque's
March 31st Semi Annual Report, a Consent Decree required submittal.
Background
The City of Dubuque, Iowa is under a Consent Decree according to Case
2:11 -cv- 01001 -EJM, United States of America and the State of Iowa v. the City of
Dubuque, IA (N.D. Iowa), Civil Action Number 2008V00041, DOJ Case Number
90 -5 -1 -1 -09339 effective June 27, 2011. Per the Consent Decree, the City is required to
submit a Semi Annual Report each March 31st and September 30th after the effective
date of the Consent Decree.
Discussion
The purpose of the Semi Annual report is to present events and activities associated
with the W &RRC and the Sanitary Sewer Collection System since approval of the
Corrective Action Plans. The report specifically includes documentation on all Sanitary
Sewer Overflows, a summary and status of projects including the WRRC Upgrades, a
listing of all NPDES violations, and efforts and actions taken to reduce sources of
infiltration and inflow.
Action to be taken
I respectfully request the City Council approve and authorize the City Manager to certify
the March 31st Semi Annual Report and Engineering staff to submit the certified report
to the US Department of Justice, US EPA and the Iowa Department of Natural
Resources.
cc: Barry Lindahl, City Attorney
Denise Ihrig, Environmental Engineer
Prepared for:
UNITED STATES
ENVIRONMENTAL
PROTECTION AGENCY,
UNITED STATES
DEPARTMENT OF JUSTICE
AND
IOWA
DEPARTMENT OF
NATURAL RESOURCES
Prepared by:
CITY OF DUBUQUE, IA
50 W 13th Street
Dubuque, IA 52001
Consent Decree
Semiannual Report
March 31, 2014
Consent Decree No. 2:11 -cv- 01011 -EJM
March 3, 2014
Table of Contents
1.0 CERTIFICATION 1 -1
2.0 INTRODUCTION 2 -1
2.1 Background 2 -1
2.2 Purpose 2 -1
2.3 Report Summary 2 -1
3.0 SANITARY SEWER OVERFLOWS 3 -3
3.1 Sanitary Sewer Overflow Record 3 -3
3.2 SSO's Effect on Public Health and Water Quality 3 -4
3.3 Measures Enacted to Minimize Duration and Impact 3 -4
3.4 Measures Enacted to Stop the Overflow Event 3 -4
3.5 Measures Enacted to Prevent Another Recurrance 3 -4
3.6 Capturing Key Way Overflows 3 -4
3.7 Warning Sign Postings 3 -5
4.0 WATER & RESOURCE RECOVERY CENTER CONSTRUCTION UPGRADE. 4 -1
4.1 Project Planning 4 -1
4.2 Current Project Status 4 -1
4.3 Biosolid Accumulation Prevention at the W &RRC 4 -2
5.0 NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES)5 -1
5.1 Summary of all NPDES Permit Requirement Information 5 -1
5.2 NPDES Violations at the WRRC During The Reporting Period 5 -1
5.2.1 NPDES Violation(s) Log 5 -1
5.2.2 Cause of NPDES Violations 5 -1
6.0 INFLOW & INFILTRATION REDUCTION PROGRAM 6 -2
6.1 Background 6 -2
6.2 Flow Metering 6 -2
6.2.1 Sewershed 11 Flow Metering 6 -2
6.2.2 Sewershed 7 Flow Metering 6 -2
6.2.3 Sewershed 5 Flow Metering 6 -3
6.2.4 Sewershed 10 Flow Metering 6 -3
6.3 Source Investigations 6 -3
6.3.1 Private Property Inspections 6 -3
6.3.2 Dye Testing 6 -4
6.3.3 Smoke Testing 6 -5
i
6.3.3 Smoke Testing 6 -5
6.3.4 Manholes 6 -5
6.3.5 Sanitary Sewer 6 -5
6.4 Corrective Action Plan 6 -5
6.5 Implementation of Corrective Action Plan 6 -5
7.0 CMOM UPDATE 7 -1
7.1 The CMOM Program 7 -1
7.2 CMOM Implementation 7 -1
8.0 ASSESSMENTS AND ENGINEERING ANALYSES 8 -1
9.0 OTHER RELATED ACTIVITIES 9 -1
APPENDICES
APPENDIX A — W &WRC CERTIFICATE OF SUBSTANTIAL COMPLETION 9 -2
APPENDIX B — SEWERSHED 10 FLOW METER LOCATIONS AND NOVEMBER 17TH
RAIN EVENT PRELIMINARY FLOW DATA 9 -3
APPENDIX C — SEWERSHED 11 MASTER METER DATA: NOVEMBER17, 2013 9 -4
TABLES
Table 2-1. Organization of information required by the Consent Decree. 2 -2
Table 3 -1. Sanitary sewer overflows during the reporting period. 3 -3
Table 3 -2. Warning sign posting locations. 3 -5
Table 4 -1. Significant deadlines for the Water & Resource Recovery Center. 4 -1
Table 5 -1. Monthly operating reports submitted during the reporting period. 5 -1
Table 6 -1. Property inspection progress .6 -4
Table 6 -2. Manhole Replacement 2013 6 -6
FIGURES
Figure 6 -1. Map of priority sewersheds for I &I investigation. 6 -4
ii
1.0 Certification
I certify under penalty of law that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my directions and my inquiry
of the person or person who manage the system, or those persons directly responsible for
gathering the information, the information submitted is, to the best of my knowledge and belief,
true, accurate, and complete. I am aware that there are significant penalties for submitting false
information, including the possibility of fine and imprisonment for knowing violations.
Michael C. Van Milligen
City Manager
2.0 Introduction
2.1 BACKGROUND
The City of Dubuque, Iowa is under a Consent Decree according to Case 2:11 -cv- 01001 -EJM,
United States of America and the State of Iowa v. the City of Dubuque, IA (N.D. Iowa), Civil
Action Number 2008V00041, DOJ Case Number 90- 5 -1 -1- 09339.
The Consent Decree became effective on June 27, 2011 and requires the City to submit
semiannual reports to the Department of Justice (DOJ), Environmental Protection Agency (EPA)
and Iowa Department of Natural Resources (DNR).
2.2 PURPOSE
The purpose of this report is to satisfy Section VIII, Paragraph 25 of the Consent Decree.
Paragraph 25 requires the City to submit semiannual reports on March 31 and September 30 after
the Effective Date (June 27, 2011). The report includes summary information regarding events
and activities performed in the prior six months. Therefore, the "reporting period" shall refer to
the time between September 1, 2013 and February 28, 2014.
2.3 REPORT SUMMARY
Paragraph 25 of the Consent Decree requires the semiannual reports to include specific
information as well as a summary of the status and progress of all projects and programs required
by Sections V and VI of the Consent Decree. Table 2 -1 lists how the required information is
organized in this report.
Table 2 -1. Orsanizatiion of information required by the Consent Decree.
Consent Decree
Paragraph
Summary of Requirement
Report Section
25(a)i
Sanitary Sewer Overflow (SSO) locations
3.1
25(a)ii
SSO duration of flows
Table 3 -1
25(a)iii
SSO estimated flow volume
Table 3 -1
25(a)iv
Waterbody downstream of SSO
Table 3 -1
25(a)v
Suspected cause of SSO
Table 3 -1
25(a)vi
SSO effect on public health and water quality
3.2
25(a)vii
Measures to minimize SSO
3.3
25(a)viii
Measures to stop SSO
3.4
25(a)ix
Measures to prevent recurrence of SSO and
milestones
3.5
25(b)i
Construction upgrades
4.0
25(b)ii
NPDES permit summary
5.1
25 iii
ro)
NPDES permit violations during reporting
period
5 2
8
Assessments and engineering analyses
8.0
9
Disposal of biosolids at WPCP
4.3
10(a)
Capture of overflow from Key Way Drive
manhole
3.6
10(b)
Posting of warning signs at SSO locations
3.7
11
Construction upgrade to WPCP
4.2
12(a)
North Fork Catfish Creek interceptor placed into
service
Reported in 9/30/11
Semiannual Report
12(b)
I &I flow metering
6.2
12(c)
Flow meters installed in first sewershed during
2010
Reported in 9/30/11
Semiannual Report
12(d)
I &I source identification
6.3
12(e)
I &I corrective action plan
6.4
12(f)
Implement I &I corrective actions
6.5
13(a)
Collection System Management, Operation, and
Maintenance plan (CMOM)
7.0
13(b)
Implement CMOM
7.2
14
Certify legal authority
Completed upon signing
of Consent Decree
15
Certify that Section V of Consent Decree has
been completed and placed into service
To be completed by June
30, 2016
16
Demonstrate all SSO and by -passes have been
eliminated
To be completed by June
30, 2017
17
If SSO or by -pass occurs, submit Remedial Plan
and Schedule
Only applicable after
June 30, 2017
18
If SSO or by -pass occurs due to O &M, submit
Remedial Plan and Schedule
Only applicable after
June 30, 2017
2 -2
3.0 Sanitary Sewer Overflows
3.1 SANITARY SEWER OVERFLOW RECORD
The City of Dubuque experienced five (5) dry weather sanitary sewer overflows during the
reporting period. Table 3 -1 lists the locations and details of the overflows. The times reported as
Start Times document when the call carne into the Public Works department, although it is
difficult to know the precise time of the start of the overflow as it is reliant upon a member of the
public observing and reporting the occurrence. The end time is documented as the time when the
Public Works department was able to return the flow back to the sewer flow line and contain any
spill that may have occurred.
Sanitary sewer overflow event number 4 at East 21st Street and Elm Street was not able to be
quantified in the same manner other overflows were, as it was detected during a planned
inspection of the Bee Branch Storm Sewer at that location. During the inspection, it was noted
sewage was leaking through the limestone walls of the Bee Branch Storm Sewer. From City
maps it was determined a sanitary sewer siphon was present at the location where the leaking
appeared. The void in the storm sewer was filled to prevent further sewage from entering the
storm sewer. As an immediate repair would present significant construction issues, the City is
redirecting the sanitary sewer and will be installing new sanitary sewer, thus abandoning the
siphon. Plans are out for competitive bid and work will start as soon as bids are received and
approved.
Table 3 -1. Sanitary sewer overflows during the reporting period.
SSO#
1
2
3
4
5
SEWERSHED
14
2
20
10
2
Local Address
Dodge St and
University Ave.
4545 Futuro
Court
500 Blk of
Samuel Street
East 21' St. and
Elm Street
4800 Chavenelle
Road
Start Date
9/24/2013
9/27/2013
12/28/2013
1/8/2014
1/15/2014
End Date
9/24/2013
9/27/2013
12/28/2013
1/8/2014
1/15/2014
Start Time
9:00 AM
12:00 PM
8:45 AM
UNK
9:45 PM
End Time
11:20 AM
1:00 PM
9:30 AM
1/8/2014
11:00 PM
Overflow
Volume, Gal.
5,000
1,000
700
UNK
100
Downstream
Waterbody
Catfish Creek
N/A Controlled
on Site
Maus Lake
Bee Branch
Creek
N/A Controlled
on Site
Suspected
Cause
Debris/Roots
Roots
Roots
Pipe Failure
Debris — Broken
Concrete MH
Riser
3.2 SSO'S EFFECT ON PUBLIC HEALTH AND WATER QUALITY
No effects on public health were reported. Visual inspection at the downstream water body
showed no sign of putrescent, unsightly or harmful bottom deposits; oil, scum and floating
debris; unsightly color or turbidity; or offensive odors. For each incident in the public right of
way, the Public Works department cleaned the area and posted the required SSO signs. In
addition, public news releases are issued and the events are reported to the Iowa DNR's
Manchester office.
3.3 MEASURES ENACTED TO MINIMIZE DURATION AND IMPACT
The City minimized the duration and impact of the SSOs by quickly responding to the event after
it was called in and setting up a City -owned vacuum -jet truck to jet the sewer main and remove
the blockage. In two cases, events 2 and 5, the City was able to prevent the overflow from
reaching a water body. In event 4, the overflow was prevented by filling the void in the storm
sewer preventing flow from passing into the storm sewer from the sanitary sewer.
3.4 MEASURES ENACTED TO STOP THE OVERFLOW EVENT
For events 1, 2, 3, and 5, the overflow was stopped by removing the blockage using the vacuum -
jet equipment, localizing and minimizing the event. For event 4, the void in the storm sewer was
filled to prevent further sewage from entering the storm sewer.
3.5 MEASURES ENACTED TO PREVENT ANOTHER RECURRANCE
Increased maintenance will be performed on lines where debris and roots were the cause of the
blockage. Overflow event 4 where there was a pipe failure, the sanitary sewer can be abandoned
and flows redirected to a different sanitary sewer in the same vicinity thereby preventing future
overflows in the same location. The work required to abandon the existing sanitary sewer and
siphon and install new sanitary sewer will be conducted under contract; the project is currently
out for competitive bids and work will start as soon as bids are received and approved.
3.6 CAPTURING KEY WAY OVERFLOWS
Paragraph 10 of the Consent Decree requires the City to capture all overflows from the manhole
located on Key Way Drive between 3500 Keymer Drive and 3507 Keystone Drive. No sanitary
sewer overflows occurred at this location during the reporting period.
3 -4
3.7 WARNING SIGN POSTINGS
Paragraph 10 of the Consent Decree requires that the City post a warning sign at all SSO sites for
at least 6 months after completion of the site cleanup, unless IDNR decides that the sign may be
posted for a shorter period of time or not at all. Table 3 -2 lists the current locations where signs
are posted. (Postings are not required for basement backups.)
Table 3 -2. Warning sign posting locations.
SSO Location
Description
Dodge St. and University Ave.
Signs posted in the woods near the overflow location
4545 Futuro Ct.
Signs posted behind the south curb
500 Block of Samuel St.
Sign posted on a barricade behind the curb
E. 214 St. and Elm St.
No sign posted
4800 Chavenelle Rd.
Sign posted on a barricade behind the curb
3 -5
4.0 Water & Resource Recovery Center
Construction Upgrade
4.1 PROJECT PLANNING
During its Fiscal Year 2006 goal setting process, the City Council listed the Water Pollution
Control Plant (WPCP) as one of its high priorities. City staff subsequently applied for a State
Revolving Fund (SRF) planning and design loan during the summer of 2006, and plant upgrades
were placed on the DNR Intended Use Plan schedule. Following public hearings and bidding
requirements, the Facility Plan was developed and approved by DNR. The facility's name was
also changed to the Water & Resource Recovery Center (W &RRC).
In October 2008, the team of Strand Associates and IIW Engineers was approved by the City
Council to proceed with the design of the W &RRC upgrades. The NPDES permit was issued by
DNR staff on April 1, 2010, and the plant construction permit was signed by DNR staff on April
5, 2010.
Following public bidding requirements, the City Council approved a contract, and the notice to
proceed was issued August 19, 2010. Table 4 -1 lists the revised significant deadlines for the
project, which take into account project delays resulting from force majeure.
Table 4 -1. Significant deadlines for the Water & Resource Recovery Center.
Deadline
Target Date
Digester Startup
January 7, 2013
Sludge Processing Startup
February 6, 2013
Excess Flow Equalization
April 18, 2013
Aeration Tank Completion
June 21, 2013
Final Clarifiers
August 8, 2013
Substantial Completion
August 29, 2013
Final Completion
May 14, 2014
4.2 CURRENT PROJECT STATUS
The City of Dubuque's lead engineer, Strand Associates, have certified the project substantially
complete. A copy of the Substantial Completion letter can be found in Appendix A. Strand has
prepared a punch -list for the contractor. Strand and the contractor are working through the list to
bring the improvements to final completion. The ultraviolet disinfection system was started in
March 2011 and continues to be operational. The anaerobic digestion complex started up August
9, 2012. On August 20, 2012 seed sludge was added to the digesters, with solids from the
Dubuque plant added to the digesters shortly thereafter. With a successful startup of the digesters
4 -1
in January 2013, the City installed the new solids handling equipment which came on -line in
February 2013. A bio -solid handling contract was negotiated and signed with Nutri -Ject Systems
of Hudson, Iowa.
4.3 BIOSOLID ACCUMULATION PREVENTION AT THE W &RRC
In February 2013, the City installed the new solids handling equipment (two centrifuges), and
entered into a contract with Nutri -Jet Systems of Hudson, Iowa to manage the bio- solids, thereby
preventing accumulation of bio - solids at the W &RRC.
4 -2
5.0 National Pollutant Discharge Elimination
System (NPDES)
5.1 SUMMARY OF ALL NPDES PERMIT REQUIREMENT INFORMATION
NPDES Monthly Operating Reports (MOR) for the City of Dubuque W &RRC were submitted to
IDNR on the dates listed in Table 5 -1:
Table 5 -1. Monthly operating reports submitted during the reporting period.
Report
Date Submitted
September 2013
10/14/2013
October 2013
11/15/2013
November 2013
12/15/2013
December 2013
1/15/2014
January 2013
2/13/2014
February 2013
Scheduled 3/15/2014
5.2 NPDES VIOLATIONS AT THE WRRC DURING THE REPORTING PERIOD
There were no NPDES Violations during the reporting period
5.2.1 NPDES Violation(s) Log
There were no NPDES Violations during the reporting period.
5.2.2 Cause of NPDES Violations
There were no NPDES Violations during the reporting period.
6.0 Inflow & Infiltration Reduction Program
6.1 BACKGROUND
Prior to the Consent Decree date of lodging, the City experienced several discharges of untreated
or partially treated wastewater. These events were caused by sharp increases in flow within the
sanitary sewer system during and immediately after a rainstorm. To better locate the sources of
this issue, the City placed flow meters throughout the city. Depending on location, the meters
measured the flow of water from each sewershed over a one to eleven month period of time. Five
of the twelve sewersheds were identified as receiving elevated flows during and directly after a
precipitation event.
Under the Consent Decree, the City has agreed to investigate these five sewersheds before
January 1, 2016. The section below describes the City's progress in identifying I &I sources in
the five sewersheds (Figure 6 -1).
6.2 FLOW METERING
During the reporting period the City conducted flow metering at key locations in sewersheds 11,
7, 5, and 10.
The Sewershed 10 meters are located downstream of sewersheds 5, 7, and 6 (a non - Consent
Decree area). Data from these locations will assist the City in localizing issues and specifying
corrective actions for Sewershed 10.
6.2.1 Sewershed 11 Flow Metering
The City continues to monitor flows through Sewershed 11 and except for flow meter
maintenance and repairs will keep a minimum of three flow meters in and around the Rosedale
and Locust area where sanitary sewer overflows remain an occurrence. Data from rain events
will be retained and compared to future rain events to see if any patterns emerge. Further, the
flow data will be used to build a hydraulic model of the sewer system to assist in determining
alternative methods for reducing sanitary sewer overflows. Appendix C contains flow data
collected at the Sewershed 11 master meter located at Locust and Foye during the November 13,
2013 rain event. No SSO occurred during the rain event, however the rise in flow appears to be
directly attributed to inflow versus infiltration as can be seen from the sharp increase in peak
flow through the flow meter.
6.2.2 Sewershed 7 Flow Metering
Initial flow data in Sewershed 7 was captured in 2012. Throughout 2013 the City collected
additional data to clarify where the inflow and infiltration is entering the sewer system which
will allow the City to target capital improvements. As such, the corrective action plan for
Sewershed 7 is based on the flow data collected throughout the monitoring periods and flow
6 -2
monitors will remain downstream of the recommended improvements. The improvements were
requested in the City's FY2015 budget and are subject to available funding and City Council
approval. Should approve be granted and funds appropriated, the corrective actions are
scheduled for competitive bidding mid -2014.
6.2.3 Sewershed 5 Flow Metering
Flow monitoring in Sewershed 5 is complete per the Consent Decree schedule. Similar to the
other Consent Decree areas a key flow monitor will remain in place to assist the City's analysis
of Sewershed 10 and track the performance of capital improvements.
As stated in the September 2013 Semi - Annual Report, early flow monitoring and site inspection
in Sewershed 5 detected significant inflow in an area adjacent to the Carter Road detention basin.
The location of the basin is situated such that during detention times, sanitary sewer manholes
may be covered with storm water. A manhole casting had shifted and was repaired. Further flow
monitoring will be necessary to isolate further inflow and confirm the corrective actions made in
the sewershed continue to perform.
6.2.4 Sewershed 10 Flow Metering
Flow metering in Sewershed 10 started in November 2013. The Sewershed 10 drainage area
takes on flow from several other Consent Decree sewersheds. A location map in Appendix B
shows the drainage area and where other sewersheds tie in. A master meter is located at
Rhomberg and Kneist streets, with several other meters dispatched to collect the sub -basin flow
data. These locations are also shown on the map.
On November 17th, 2013, the City was able to capture one rain event before the winter season.
During the peak of the rain event, flows passing through the Sewershed 10 master meter
registered at 5.0MGD. A recorded average shows a possible typical flow to be 1.6 MGD; as the
data collection period for this area is limited to only a few weeks, the 1.6MGD may change with
additional information. Still, the data recorded clearly shows a direct inflow issue occurring, as
the spike directly correlates to the rain event and flows return to the "normal" range quickly
versus a prolonged duration which would signify infiltration. Additional data is required to
support this theory, and the current flow meters will remain in place until such rain events occur
to support a direction on how to correct and manage the increase in flow. Appendix B also
includes flow data sheets for the November 17, 2013 rain event as data is captured passing
through sewersheds 5, 7, and 10. Data was not available from Sewershed 6 as meters had not
been installed at the time of the event and Sewershed 5's meter experienced a reading error. In
Sewershed 5, a site inspection verified that flows had returned back to the flow line, yet the
readings did not reflect that had occurred.
6.3 SOURCE INVESTIGATIONS
6.3.1 Private Property Inspections
Private property inspection progress is reported in Table 6 -1. Private property inspections
identify the roof drain discharge location, the presence of any stairwell or driveway drains, and
the presence of a sump pit/pump on site. A passing inspection indicates no connections of clear
6 -3
water to the sanitary system. A failed inspection indicates a connection of clear water directly
into the sanitary system, which may include roof drains connected to the sanitary sewer; a
stairwell or driveway drain which is connected to the building floor drain; or a sump pump which
is plumbed directly to the sanitary lateral or a floor drain within the building.
Table 6 -1. Property inspection progress.
Sewershed
Percent of Completed Property
Inspections*
Consent Decree Deadline to Complete
Property Inspections
11
100
9/30/11
12
98
6/30/12
7
97
6/30/13
5
98
6/30/14
10
19
6/30/15
*The Consent Decree does not state that all properties must be inspected. However, it is the City of Dubuque's
intent to inspect 100% of the properties in each sewershed.
Each improper connection observed during a private property inspection results in a failure
notice. The property owner then has 30 days to correct the improper connection, at which point a
re- inspection of the property conducted is to verify that the improper connection has been
eliminated. If the improper connection has not been corrected, the City may pursue legal action
against the property owner to complete the necessary work
Figure 6 -1. Map of priority sewersheds for I &I investigation.
6 -4
6.3.2 Dye Testing
Dye testing is performed in conjunction with private property inspections if the discharge
location of a downspout, exterior stairwell drain, or driveway drain is unknown. The City will
use dye to identify the discharge location(s). If the dye is found in the sanitary sewer, the
property owner receives notice consistent with the private property inspection process described
in Section 6.3.1.
6.3.3 Smoke Testing
In July 2013, the City completed smoke testing in Sewershed 10. Smoke was detected around
manholes revealing in some cases no sealing gasket or no seal between the casting and the
manhole adjusting rings. Open pick holes were notable along with caps missing from private
sanitary sewer cleanouts. Public right of way items acknowledged in the smoke testing report
will be included for correction in the corrective action plan for Sewershed 10. Private sanitary
sewer issues will be coordinated with private property owners.
6.3.4 Manholes
Manholes in Sewershed 7 were inspected and their condition documented. Manholes that were
recorded as poor or in need of repair were documented for rehabilitation or replacement in the
Sewershed 7 Corrective Action Plan as submitted in December 2013.
6.3.5 Sanitary Sewer
The City continues to conduct closed- circuit televising in the focus areas, currently working in
Sewershed 10. The recorded footage will allow the City to view any cracks, leaky joints, illegal
lateral connections, and damaged or broken pipes. The severity of the structural degradation of
each pipe section is rated based on a severity scale following the NASSCO (National Association
of Sewer Service Companies) rating schedule. The rating system is used to assist the city in
prioritizing which pipe sections are in need of immediate improvement. This work combined
with the flow monitoring data provides the City with direction on how and where to make valued
capital improvements.
6.4 CORRECTIVE ACTION PLAN
Corrective Action Plans are scheduled for submittal as required by Paragraph 12 of the Consent
Decree. The Sewershed 7 Corrective Action Plan was submitted ahead of the December 31, 2013
deadline. The next Corrective Action Plan is due December 31, 2014 and will contain corrective
measures for Sewershed 5.
6.5 IMPLEMENTATION OF CORRECTIVE ACTION PLAN
The City completed an extensive sanitary sewer rehabilitation project as identified in the
Corrective Action Plans for Sewersheds 11 and 12.
Over 10,000 linear feet of 8 -inch diameter sanitary sewer was rehabilitated with trenchless
cured -in -place pipe. Along with pipe rehabilitation, the City also completed 11 sanitary sewer
manhole replacements throughout Sewersheds 11 and 12, as documented below in Table 6 -2.
6 -5
Table 6 -2 Manhole Replacement 2013
Item
No.
Date Replaced
Manhole ID
Sewer
Shed
Location
1
October 23, 2013
SAN S 05394
11
N. Grandview Ave.
2
October 24, 2013
SAN S 05397
11
Atlantic St. (Alley)
3
October 22, 2103
SAN S 05412
11
Auburn & Custer
4
November 1, 2013
SAN S 05587
12
Loras Blvd
5
October 18, 2013
SAN S 05671
12
Rose St. (Alley)
6
October 18, 2013
SAN S 05693
12
University Ave.
7
October 18, 2013
SAN S 05706
12
University Ave.
8
November 1, 2013
SAN S 04302 - Eliminated
12
Maiden Lane
9
November 1, 2013
SAN S 04303
12
Maiden Lane
10
October 30, 2013
SANS 04304
12
Maiden Lane
11
October 18, 2013
SAN S 05804
12
Wilson St. (Alley)
6 -6
7.0 CMOM Update
7.1 THE CMOM PROGRAM
The City of Dubuque's Capacity, Management, Operation and Maintenance Plan (CMOM)
provides a summary of the City's policies, procedures, practices, and responsibilities associated
with its sanitary sewer collection system. It is the blueprint for the City's managers and field
workers to better manage, operate, and maintain Dubuque's sanitary sewer collection system,
investigate capacity- constrained area, prevent SSOs, respond to SSOs that may occur, and plan
for future system expansion.
The EPA approved the City of Dubuque's CMOM plan on June 4, 2012.
7.2 CMOM IMPLEMENTATION
As required by Paragraph 13 of the Consent Decree, the City fully implemented the CMOM
within two calendar months (August 4, 2012) of approval by the EPA.
Section 6.4 of the City of Dubuque's CMOM Program, requires the City to annually inspect fifty
(50) miles of gravity sanitary sewer through various methods including visual inspection,
pipeline jetting, or closed- circuit televising (CCTV). The inspection is in addition to the
predictive and preventive maintenance also prescribed in the CMOM. The City has cleaned or
inspected 70.84 miles from September 1, 2013 through this reporting period, the total footage for
2013 was 166 miles.
The City developed the CMOM to serve as a "living" document. As the City reviews its current
procedures and codes, the CMOM will be updated and new procedures implemented as needed.
Any revisions to the CMOM will be submitted to EPA, DOJ, and DNR for review and approval.
The City is currently focused on the Fats, Oils, and Grease (FOG) Program covered by the
CMOM, as several of the dry weather sanitary sewer overflows are the result of grease in the
public sewer from private establishments. The City is prepared to purchase software and craft an
ordinance to support the departments as they enforce the program. The City of Dubuque's
FY2015 budget, if approved, contains a request for funds to purchase software to manage the
FOG program.
8.0 Assessments and Engineering Analyses
The City's engineering department, public works department and W &RRC staff continue to
evaluate and analyze the sewer collection system and W &RRC to ensure compliance with all
legal requirements. However, no specific study was undertaken during the reporting period.
9.0 Other Related Activities
Staff from the City of Dubuque is scheduled to meet with representatives of the Iowa
Department of Natural Resources Manchester field office to discuss technical issues
concerning sanitary sewer overflows, inflow and infiltration, and other items covered by
the Consent Decree. City staff requested this voluntary meeting to hopefully provide an
avenue for direct communication between the City and the DNR. The City of Dubuque is
also arranging to meet with EPA Region 7 representatives for the same purpose.
APPENDIX A - W &WRC
CERTIFICATE OF SUBSTANTIAL
COMPLETION
STRAND
ASSOCIATES'
October 28, 2013
Mr. Steve Sampson Brown
City of Dubuque
50 West 13th Street
Dubuque, IA 52001
Re: Water Pollution Control Plant Modifications
Contract No. 1 -2010
City of Dubuque, Iowa
Dear Mr. Sampson Brown and Mr. Daniels:
Strand Associates, lnc '
910 West Wingra Drive
Madison, WI 53715
(F') 608- 251 - 4813
(F) 608- 251 -8655
Mr. Jonathan Daniels
Miron Construction Co., Inc.
1471 McMahon Drive
Neenah, WI 54956
In accordance with Article 14.04 of the General Conditions and based on the comments received by
Strand Associates, Inc .® from the City of Dubuque on October 28, 2013, this letter is a Definitive
Certificate of Substantial Completion for Contract No. 1 -2010, with the exception of the lift station
controls and modifications. This certificate includes by reference the Tentative Certificate of
Substantial Completion of the project, dated October 18, 2013, and the tentative List of Items to be
Completed or Corrected that was enclosed with that certificate. Enclosed with this certificate are
additions to the List of Items to be Completed or Corrected.
The Tentative Certificate of Substantial Completion fixed the Substantial Completion date at
August 29, 2013, for the project, with the exception of the lift station controls and modifications.
Sincerely,
STRAND ASSOCIATES, INC®
G en W. Tranowski
Enclosures
c: Jonathan Brown, City of Dubuque
Larry W. Solchenberg, Strand Associates, Inc.®
GWi: smelli AMADIDocumentsi SpecificationslArchive12010 \Dubuquo, lA\t- 2010.1154.008.gsvt\(17) Specification Lmers\(f) Definitive Certificate of Subnormal Completion Letterk10282OI 3.docr
Arizona I Illinois 1 Indiana I Kentucky Ohio 1 Wisconsin
www.strand.com
APPENDIX B - SEWERSHED 10
FLOW METER LOCATIONS AND
NOVEMBER 17TH RAIN EVENT
PRELIMINARY FLOW DATA
THE CrrY OF
DUB
Masterpiece on the Mississippi
t,
you
6A Flow Meter
E• i�r
fir•
Ni'mod
Sewershed 10
Sub Sewershed and Tributar Flow Meter Locations
DAGIS
MVO. ARM dtoauMMlc WORM . SYSTIII
- HARL%Q ?y
6B Flow Meter
co
L
10-4 Flow Meter
M
Si
Ai
c� 10 -2A Flow Meter
tr
VI -A
v1
Extra Cedar St LS Meter
ARD.
ST 7B Flow Meter
E PL
DISCLAIMER: This information was compiled
using the Dubuque Area Geographic Information System
(DAGIS), which includes data created by both the City of
Dubuque and Dubuque County. It Is understood that, while
the City of Dubuque and participating agencies utilized the
most current and accurate Information available, DAGIS and
It's suppliers do not warrant the accuracy or currency of the
Information or data contained herein. The City and participating
agencies shall not be held Liable for any direct, Indirect, incidental,
consequential, punitive, or special damages, whether foreseeable or
unforeseeable, arising out or the authorized or unauthorlmd use of
this data or the Inability to use this data or out or any breach or
warranty whatsoever.
KLING
E
tO
Extra Cedar St LS Meter
oak
1 inch = 1,250 feet
500250 0 500 1,000 1,500 2,000 Feet
Map Prepared by:
City of Dubuque
Engineering Division
50 West 13th Street
Dubuque, Iowa 52001
Phone: (563) 589 -4270
Fax: (563) 589 -4205
Ave. Wet Flow Rate (1.697 mgd):1.64
SEIAJEgSHED 10 tV'MsreQ ETCR
Rhomberg and Kneist
November 17. 2013 Storms
Ave. Dry Rate (1.626 mgd):1.18 Cumulative Rainfall (1.340 in):0.00
4—
0)3
2—
1
3.0 _
2.5
2.0
0 1.5 =
E 1.0—
0.5
0.0 -
0.10
A
j
Nov 2013
16 Sat 17 Sun 18 Mon 19 Tue 20 Wed 21 Thu 22 Fri
11/15/2013 12:00:00 AM - 11/22/2013 12:00:00 AM
Rhomberg and Kneist
November 17. 2013 Storms
Wet Total Flow (11.879 mgal):
Wet Flow Rate (1.697 mgd):1.64
DWF Total (11.384 mgal):
ADWF Rate (1.626 mgd):1.18
0.05-
0.04-
76,0.03-
E
0.02-
- NN.
0.00
5—
4—
.3—
a�
E -
2—
0
Nov 2013
16 Sat 17 Sun 18 Mon 19 Tue 20 Wed
11/15/2013 12:00:00 AM - 11/07/2013 12:00:00 AM
21 Thu
22 Fri
45 W 32nd
November 17. 2013 Storms
Wet Total Flow (9.363 mgal):
Wet Flow Rate (1.337 mgd):0.29
Setiyasom 5
DWF Total (1.976 mgal):
ADWF Rate (0.282 mgd):0.46
iamb
0.014
0.012-
0.010 —
0.008-
rn
F 0.006
0.004
0.002 —
0.000
4.0
3.5
3.0
2.5
E2.0_
1.5
1.0
15 Fri
Nov 2013
16 Sat 17 Sun 18 Mon 19 Tue 20 Wed 21 Thu
11/14/2013 12:00:00 PM - 11/21/2013 12:00:00 PM
•■
Ave. Wet Flow Rate (1.337 mgd):0.29
3
1—
45 W 32nd
November 17. 2013 Storms
Ave. Dry Rate (0.282 mgd):0.46
Cumulative Rainfall (1.330 in):0.00
0-
0.6
0.5
0.4- -,
0.3—
0.2-
0.1—
9'
15 Fri
Nov 2013
16 Sat 17 Sun 18 Mon 19 Tue 20 Wed 21 Thu
11/14/2013 12:00:00 PM - 11/21/2013 12:00:00 PM
0.0020
0.0015
7a
p. 0.0010
c
0.0005
0.0000
0.5
0.4
-8)0.3
P
0.2
0.1
SewenNsp '4A
white street next to fulton
November 17. 2013 Storms
Wet Total Flow (1.380 mgal):
Wet Flow Rate (0.197 mgd):0.24
DWF Total (1.277 mgal):
ADWF Rate (0.183 mgd):0.31
0.0
15 Fri
Nov 2013
16 Sat
1
1
IN
1
17 Sun 18 Mon 19 Tue
11/14/2013 12:00:00 PM - 11/21/2013 12:00:00 PM
20 Wed
I
21 Thu
Ave. Wet Flow Rate (0.197 mgd):0.24
white street next to fulton
November 17. 2013 Storms
Ave. Dry Rate (0.183 mgd):0.31 Cumulative Rainfall (1.260 in):0.00
0.5
0.4
010.3 -
E
ii 2
1
0
4 —
0.1—
0.0
P +4
0.'C-
0.0 -
0.00 ,
15 Fri 16 Sat 17 Sun 18 Mon 19 Tue 20 Wed 21 Thu
Nov 2013 11/14/2013 12:00:00 PM - 11/21/2013 12:00:00 PM
&wEe&1uo 38
2404 White
November 17. 2013 Storms
Wet Total Flow (1.056 mgal):
Wet Flow Rate (0.151 mgd):0.14
DWF Total (1.148 mgal):
ADWF Rate (0.164 mgd):0.22
0.0008
0.0007
0)0.0006 -1-
;•7
0.0005
0.0004—
0.24-1
0.22
0.20
X0.18
0.16
KI
0.14
0.12-
0.10-
14
15Fri 16 Sat 17 Sun 18 Mon 19 Tue
Nov 2013 11/14/2013 12:00:00 PM - 11/21/2013 12:00:00 PM
20 Wed
21 Thu
0.25—
Ave. Wet Flow Rate (0.151 mgd):0.14
2404 White
November 17. 2013 Storms
Ave. Dry Rate (0.164 mgd):0.22 Cumulative Rainfall (1.260 in):0.00
0.10
0.22-7
0.20
7
� 0.18 'r ������
E 0.16
0.14—
0.12
15 Fri
Nov 2013
16 Sat
17 Sun 18 Mon 19 Tue 20 Wed 21 Thu
11/14/2013 12:00:00 PM - 11/21/2013 12:00:00 PM
APPENDIX C - SEWERSHED 11
MASTER METER DATA:
NOVEMBER 17, 2013
0.005
0.004
0.003
co 0.002
0.001
1.4
1.2
1.0
75,0.8
0.6
0.4
0.2
&bJE€SHED 11
606 W Locust St and Foye
November 17. 2013 Storms
Wet Total Flow (3.052 mgal):
Wet Flow Rate (0.436 mgd):0.45
DWF Total (2.912 mgal):
ADWF Rate (0.416 mgd):0.65
15 Fri
Nov 2013
16 Sat 17 Sun 18 Mon 19 Tue
11/14/2013 12:00:00 PM - 11/21/2013 12:00:00 PM
20 Wed
21 Thu
606 W Locust St and Foye
November 17, 2013 Storms
Ave. Wet Flow Rate (0.436 mgd):0.45
.r
Ave. Dry Rate (0.416 mgd):0.65 Cumulative Rainfall (1.260 in):0.00
0.5
0.6
c 0.4 —
;
0.2—
0.15
0.10
0.05
r
0.00 I I
15 Fri 16 Sat 17 Sun 18 Mon 19 Tue 20 Wed 21 Thu
Nov 2013 11/14/2013 12:00:00 PM - 11/21/2013 12:00:00 PM