Sewershed 7 Corrective Action PlanMasterpiece on the Mississippi
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: Sewershed 7 Corrective Action Plan
US EPA Consent Decree Required Submittal
DATE: November 25, 2013
Dubuque
band
AI- America City
IIIii!
2007 • 2012 • 2013
City Engineer Gus Psihoyos recommends City Council authorization for the City
Manager to certify and submit the City of Dubuque's Corrective Action Plan for
Sewershed 7 to the US Department of Justice, the US Environmental Protection Agency
and the Iowa Department of Natural Resources.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
Michael 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
Masterpiece on the Mississippi
TO: Michael C. Van Milligen, City Manager
FROM: Gus Psihoyos, City Engineer
SUBJECT: Sewershed 7 Corrective Action Plan
US EPA Consent Decree Required Submittal
DATE: November 22, 2013
Dubuque
karld
au- America cnr
I'll,
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 Corrective
Action Plan for Sewershed 7.
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 Corrective
Action Plan for Sewershed 7 no later than December 31, 2013.
DISCUSSION
The purpose of the Corrective Action Plan is to present the findings of the inflow and
infiltration (I &I) identification activities i.e. property inspections, smoke testing, etc along with
the associated improvements that will reduce the volume of I &I into the collection system.
The Plan details the location of sanitary sewer manholes, sanitary sewer mains, and catch
basins within Sewershed 7, that have been identified as sources of l&l. The Plan also
reports on private properties that during inspection were found to have an illicit connection
to the sanitary sewer system. The report includes FY2015 improvements, budgetary
estimates, and a proposal for additional work to be completed under future budgets.
ACTION TO BE TAKEN
I respectfully request the City Council approve and authorize the City Manager to certify the
Corrective Action Plan for Sewershed 7 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 DEPARTMENTOF
NATURAL RESOURCES
Prepared by:
CITY OF DUBUQUE, IA
th
50 W 13 Street
Dubuque, IA 52001
Sewershed 7
Corrective Action Plan
Consent Decree No. 2:11 -cv- 01011 -EJM
November 22, 2013
TABLE OF CONTENTS
1.0 CERTIFICATION 4
1.1 CERTIFICATION STATEMENT 4
2.0 INTRODUCTION 5
2.1 BACKGROUND 5
2.2 PURPOSE 5
2.3 CORRECTIVE ACTIONS 5
Figure 2 -1 Map of Priority Sewersheds for Inflow & Infiltration 6
3.0 INFLOW & INFILTRATION REDUCTION METHODS & IMPROVEMENT PLANNING 7
3.1 METHODS 7
3.1.1 'Low Hanging Fruit' 7
3.1.2 Sewer Capacity Evaluation 7
3.1.3 Clean and Closed Circuit Televise (CCTV) Sanitary Sewers 8
3.1.4 Documentation 8
3.1.5 Applicability of Techniques 8
3.1.6 Collection System Flow Monitoring: Permanent and Mobile Units 8
3.1.7 Private Property Improvements 9
3.1.8 Ordinance and Policy 9
3.2 SANITARY SEWER EVALUATION METHOD FOR REHABILITATION /REPLACEMENT 9
3.2.1 Condition Grade 9
3.2.2 Criticality Grade 10
3.2.3 Priority Grade 10
3.2.4 Corrective Actions 11
4.0 PRIVATE PROPERTY INSPECTIONS 12
4.1 INSPECTIONS 12
4.2 PRIVATE PROPERTY CORRECTIVE ACTIONS 12
Table 4 -1 Failed and Corrected Private Property Inspections 13
5.0 SMOKE TESTING 15
5.1 INVESTIGATION 15
5.2 CORRECTIVE ACTIONS 15
5.2.1 Private Property 16
Table 5 -1 Sanitary Sewer Smoke Testing - Private Property Defects 16
5.2.2 Public (City Right of Way) Property 18
Table 5 -2 Sanitary Sewer Smoke Testing: Public Property — Sanitary Sewer 19
Table 5 -3 Sanitary Sewer Smoke Testing: Public Property — Storm Sewer Catch Basins 21
6.0 MANHOLE OBSERVATIONS 23
6.1 INVESTIGATION 23
2
6.2 CORRECTIVE ACTIONS 23
Table 6 -1 Manholes Scheduled for Repair (from July 2012 Smoke Testing) 23
Table 6 -2 Brick Manholes Scheduled for Rehabilitation or Replacement 25
7.0 FLOW METERING 27
7.1 INVESTIGATION 27
7.2 SEWERSHED 7A FLOW DATA ANALYSIS 27
Table 7 -1 Sewershed 7A 2013 Measurable Storm Event Data 28
7.3 SEWERSHED 7B FLOW DATA ANALYSIS 28
Table 7 -2 Sewershed 7 B 2013 Measurable Storm Event Data 29
8.1 SANITARY SEWER INVESTIGATION 31
8.2 CORRECTIVE ACTIONS 31
Table 8 -1 Sanitary Sewer Rehabilitation Schedule 2014 -2015 31
9.0 PLAN, SCHEDULE, AND BUDGET SUMMARY 33
9.1 FUNDING 33
9.2 BUDGET 33
Table 9 -1 Budgetary Estimate FY2015 for Sewershed 7 33
APPENDIX A — SEWERSHED 7A FLOW MONITORING DATA
APPENDIX B — SEWERSHED 7B FLOW MONITORING DATA
3
1.0 Certification
1.1 CERTIFICATION STATEMENT
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, and that based on my directions and my
inquiry of the person or persons who manages 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
4
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, effective June 27, 2011.
2.2 PURPOSE
The purpose of this report is to satisfy Section V, Paragraph 12 of the Consent Decree. Paragraph 12
requires the City to submit a corrective action plan for Sewershed 7 by December 31, 2013.
Prior to June 27, 2011, 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 following 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 metered, including Sewershed 7, were identified as receiving
elevated flows during and directly after a precipitation event, leading the City to believe the source
is from direct inflow from a pipe or pumped discharge or infiltration resulting from pipe
separation /condition issues, allowing infiltration of groundwater. Under the Consent Decree, the
City has agreed to investigate five sewersheds over a period of five years (Figure 2 -1) with the goal
of reducing the sources of inflow and infiltration (I &1).
2.3 CORRECTIVE ACTIONS
Per the Consent Decree, the City has employed numerous methods to investigate sources of inflow
and infiltration MI) including: private property inspections; sanitary sewer smoke testing; manhole
condition identification; sanitary sewer closed circuit televising (CCTV) and pipe condition
prioritization using the NASSCO assessment and certification program guidelines; and extensive
sanitary sewer flow monitoring. Corrective actions based on the techniques and methods identified
in this report are provided in subsequent sections of this plan. Section 3 presents the evaluation
methods in greater detail, sections 4 through 7 details the corrective actions determined from the
source investigation methods; and section 8 provides the budgetary estimates for the prescribed
corrective actions.
5
Figure 2 -1 Map of Priority Sewersheds for Inflow & Infiltration
Inflow & Infiltration Program
Sanitary Sewersheds To Be Inspected
\YHi,
DERBY GRANGE
KENNEDY RD
BOLEYOIR
?i.51t9 i( qO
uM000 "
4
10.6, KAUFMANN AVE
s N°ORvRrid)
E
5 K fAXNlAV OR
MILLCREST RD 2
y 3 ?=
SUMAHNEOR -<
z PENN ' YLVANIAAVE
paw'
Sewersir_ed
N PER SY'
IIIOLL ST
£ RD
> z
.3rd rx14h7
DAGIS s
Figure 2-1. Map of priority sewersheds for MI investigation.
3.0 Inflow & Infiltration Reduction Methods & Improvement
Planning
3.1 METHODS
Improvement planning is traditionally based upon several factors, including reported failures,
condition reports from sanitary sewer televising, and visual inspections. In addition to determining
improvements based on the structural integrity of the sanitary sewer system, it has become equally
important to reduce the volume of inflow and infiltration (I &1) into the collection system. l &I can
have a detrimental effect at the wastewater treatment facility, lift stations operations, and can
cause significant damage and create health and safety issues in private properties.
The end goal of any I &I reduction method is to see a measurable improvement. The following
outlines eight methods that will enable the City to chart a course to successfully monitor and
ultimately reduce sanitary sewer overflows, lift station maintenance, and treatment plant
surcharges complementing the actions described in the approved City of Dubuque CMOM.
Improvements outlined in later sections of this report are the result of many of the following
methods, and will continue to be used to develop future improvements. In addition, a greater
emphasis will be placed on flow monitoring to gauge the performance of improvements.
3.1.1 'Low Hanging Fruit'
The City of Dubuque's collection system was at one time a combined system with storm sewer
flows. The most likely remaining cross connections are floor, driveway, and roof drains; and while
not direct, storm sewers located within the same trench or within close proximity to the sanitary
sewer are also likely candidates.
3.1.2 Sewer Capacity Evaluation
Prior to performing rehabilitative techniques in any of the sewersheds the dry weather flow will be
compared to the design capacity of the sanitary sewer, rehabilitating an existing sewer that is
already under capacity for the area may not necessarily reduce sanitary sewer overflows. This
information will be used to perform further analysis in areas where surcharging still occurs after the
initial capital improvement.
7
3.1.3 Clean and Closed Circuit Televise (CCTV) Sanitary Sewers
To fully understand the condition for replacement or rehabilitation of the collection system, the
sewers are cleaned followed by a CCTV inspection. The schedule and frequency is covered in the
CMOM program.
3.1.4 Documentation
In addition to performing the cleaning and televising, the televising reports are reviewed in detail
with documentation of the review catalogued. During an inspection or review of any collection
system rehabilitative program it is important to be able to provide evidence of the condition
assessment.
3.1.5 Applicability of Techniques
Accepted rehabilitative techniques such as sanitary sewer lining and vertical lining of manholes
have proven to be successful in reducing inflow and infiltration and while the lining product is a
structural product not necessarily an I &I product the industry is recognizing its use in I &I reduction.
Care must be taken to obtain and review shop drawings and samples of products to be used.
Contract documents and specifications must be written in a manner clearly outlining the intended
use and results expected of the products. Sanitary sewer replacement may be necessary if pipe
capacity or significant structural deterioration or defects are beyond the capabilities of a structural
liner. Storm sewers should also be addressed at this time to ensure sufficient capacity is present
with an adequate number of inlets to accommodate the increased local storm and groundwater
that may be present where sanitary sewers are lined.
3.1.6 Collection System Flow Monitoring: Permanent and Mobile Units
The City is working to understand how flow travels through the City's collection system using flow
meters both permanent and mobile units. This is assisting the City in determining key locations in
need of improvement and can be used to monitor the area post improvement. While sanitary sewer
hydraulic models are used to determine surcharging in a collection system under set parameters,
calibration of a model is still required from actual flows. Flows change and are dynamic in nature,
and while a model snapshot may provide interim data, a model does not necessarily allow for active
management of how and when an overflow may occur, allowing for possible timely prevention.
Collection system flow monitoring will take flow metering data and relay in real time system
problems, such as fouling of the meter, pipe /manhole surcharging, or other issues that may cause
interruptions in service or a health and safety issue. While it will not prevent all sanitary sewer
overflows, permanent flow monitoring sites may provide for some level of warning.
8
3.1.7 Private Property Improvements
Private property inspections for illicit discharges, not including the service lateral, are currently
being conducted under the Consent Decree and those that were performed under other studies are
invaluable in determining to what extent the private sector may be contributing I &I to the
collection system. For an external source of l &I coming from a private property, such as a driveway,
the area draining to the driveway may determine the level of contributing risk. In some cases, a
private property driveway drain may not easily be disconnected as it may drain a large drainage
area due to lack of inlets and storm sewers and disconnecting the drive way drain may lead to
significant private property damage. The City has approved a financial assistance program which
combined with "green" technology efforts may present long term solutions for private property
improvements.
Private sanitary, sewer service laterals making up almost half of any collection system need to be
addressed in tandem with local public sewer improvements. Based on soil, natural spring locations,
and groundwater elevations, public sewer improvements can lead to greater problems for a private
service lateral. Lateral replacement or rehabilitation can be very costly, and so with any public
sewer lining contract consideration should be made as to whether is beneficial to install a partial or
tee liner especially where there is a non - factory lateral connection.
3.1.8 Ordinance and Policy
The Sanitary Sewer System, Capacity, Management, Operation and Maintenance Program (CMOM)
as adopted by the City of Dubuque, covers much of what is described in the above Techniques.
CMOM also includes applicable City of Dubuque ordinances and policies, it is important to keep
these relevant, up to date, and enforceable for new and existing development in the City's
continued efforts to reduce inflow and infiltration.
3.2 SANITARY SEWER EVALUATION METHOD FOR REHABILITATION /REPLACEMENT
In addition to the previous methods, the City is supporting a sanitary sewer priority grading system
based on accepted industry procedures offering a proactive approach to eliminating sanitary sewer
overflows (SSOs). The system allows City staff to pinpoint areas within the gravity sanitary sewer
pipes that need a more thorough investigation due to the critical nature of the location, physical
attributes of a pipe section, the structural integrity of the pipe, and operation and maintenance
needs of the pipe.
3.2.1 Condition Grade
The condition grade of a pipe is determined using structural and operation and maintenance (O &M)
grades acquired by closed circuit television (CCTV) evaluation of the pipe. As a pipe is televised, City
9
staff uses the National Association of Sewer Service Companies (NASSCO) Pipeline Assessment and
Certification Program (PACP) to code the pipe. Any structural and O &M deficiencies in the pipe are
noted by certified PACP operators. Since 2010, the condition coding for any pipe recorded by CCTV
is automatically done by PipeTech® software which uses the PACP condition grading system.
The PACP grading system code matrix can be found in the NASSCO PACP manual and ranges from 0
to 5. A grade of 0 means there is no structural or O &M deficiency noted for the pipe whereas a
grade of 5 would indicate a structural deficiency possibly combined with an operation and
maintenance deficiency such as excessive calcification or roots. The condition grade is the
maximum of the structural and O &M grades assigned to the pipe.
3.2.2 Criticality Grade
The criticality grade is split into two categories: "Probability of Failure" and "Consequence of
Failure." Specific analysis is performed on each category before they are combined into the
criticality grade. Eleven factors are divided among the Probability and Consequence categories:
1. Material
2. Age
3. Pipe slope
4. Maintenance
5. Proximity of the pipe to a recorded SSO
6. Pre - defined road capacity levels
7. Priority locations within the City
8. Proximity of the pipe to rivers and water bodies
9. Proximity of the pipe to railroad tracks
10. Pipe diameter
11. Pipe is located under a building.
3.2.3 Priority Grade
The priority grade is the final grade for the pipe and determines the order in which the pipes should
be investigated further. These investigations include but are not limited to further observation of
the pipe, repairs, or replacement.
The priority grade is dependent on both the condition grade and the criticality grade. The condition
grade has been assigned greater emphasis than the criticality grade because the condition of the
pipe provides more information on if the pipe is likely to fail due to structural issues. The pipe
priority grade follows the recommendation in "Guidelines for Condition Assessment and
Rehabilitation of Large Sewers" paper published in 2001 by the National Research Council of
Canada.
10
3.2.4 Corrective Actions
In prior Corrective Action reports for Sewersheds 11 and 12, the City made recommendations to
improve or replace pipes with priority grades of four and five. This follows the recommendation
established by the National Research Council of Canada in "Guidelines for Condition Assessment
and Rehabilitation of Large Sewers ". This information is now aligned with the results and analysis
obtained from the flow monitoring data.
The corrective actions listed in this report are based on the procedures listed herein, with the first
priority given to grade four and five pipes that have been identified for improvement or
replacement within an area determined by flow metering to have excessive inflow and /or
infiltration.
11
4.0 Private Property Inspections
4.1 INSPECTIONS
There are 917 private properties in Sewershed 7 per the City's records. City inspectors have
conducted 888 ("'97 %) private property inspections to identify roof drain discharge locations, the
presence of any stairwell or driveway drains, and the presence of a sump pit /pump on site. A
passing inspection would indicate no connections of clear water to the sanitary sewer system. A
failed inspection would indicate an improper connection of clear water into the sanitary system,
which could include roof drains connected to the sanitary sewer; a stairwell or driveway drain
which is connected to the sanitary sewer; or a sump pump or floor drain plumbed directly to the
sanitary sewer.
In Sewershed 7, of the original 917 properties 29 remain. The City follows a multi -step procedure to
provide many opportunities for the property owner to arrange an inspection. The first step is a
letter notifying the property owner of the Inflow &Infiltration Reduction Program, a pamphlet is
included explaining the program. If the City is not contacted, the second step is a follow up phone
call, and the third is a door hanger and 'cold - call'. If after the three attempts to contact the owner,
the City is not successful, a Final Notice letter is sent along with a second copy of the pamphlet
explaining the nature and necessity of the program. The Final Notice letter also informs the
property owner that the City may obtain an Administrative Search Warrant to complete the
inspection. If no response, the City sends the property owner a Notice to Obtain an Administrative
Search Warrant, and finally the City will obtain the search warrant to complete the inspection.
4.2 PRIVATE PROPERTY CORRECTIVE ACTIONS
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 is conducted to verify that the improper connection is eliminated. If
the improper connection is not corrected, City inspectors remind the property owner of the
required work; request a timeline to correct the improper connection; and offer suggestions on
how to efficiently and economically correct the connection. If a property owner chooses not to
correct an improper connection, the City will pursue legal action against the property owner
pursuant to City of Dubuque Code of Ordinance Sections 13 -2A -1, 13 -2 -9.
Of the 29 failed private property inspections listed in Table 4 -1, 21 have been corrected. Some
improper connections, such as stairwell drains, can require complex and costly corrections for
12
property owners. The City is sensitive to the economic hardship these corrections may cause and
the need to eliminate these significant connections to the sanitary sewer. Therefore, a cost -share
program has been established for the City to partner with property owners. City staff will continue
using the cost -share program to balance property owner costs and Consent Decree requirements.
(The City retains the right to rescind the cost -share program at any time for good cause including
funding availability). City staff continues to work with property owners to address those improper
connections not yet corrected below.
Table 4 -1 Failed and Corrected Private Property Inspections
Lin
Noe
House No.
Street Name
Defect
Corrective Action
Corrected
and RPessed
inspection
1
2444
BROADWAY
Downspount to Sanitary Sewer
Disconnect & discharge
to land
No
2
402
PRIMROSE
Exterior stairwell drains to sanitary
Plug and Provide for
Covered Area or Pipe to
Storm sewer
No
3
2845
CENTRAL AVE
Flex Hose Used to Discharge
Sump
Install rigid pipe
No
4
2006
N MAIN ST
Flex Hose Used to Discharge
Sump
Install rigid pipe
No
5
2777
BROADWAY
Sump Pump to Sanitary Sewer
Disconnect & discharge
to land
No
6
2670
CENTRAL AVE
Sump Pump to Sanitary Sewr
Disconnect & discharge
to land
No
7
2812
CENTRAL AVE
Sump Pump to Sanitary Sewer
Disconnect & discharge
to land
No
8
2247
CENTRAL AVE
Sump Pump to Sanitary Sewer
Disconnect & discharge
to land
No
9
2892
MUSCATINE
Exterior stairwell drains to Sanitary
Sewer
Completed
Yes
10
2908
CENTRAL AVE
Flex Hose Used to Discharge
Sump
Completed
Yes
11
1006
CLARKE CREST CT
Flex Hose Used to Discharge
Sump
Completed
Yes
12
2447
CENTRAL AVE
Pit no pump
Completed
Yes
13
1006
CLARKE DR
Pit no pump
Completed
Yes
14
1002
CLARKE CREST CT
Pit no pump
Completed
Yes
15
2438
CENTRAL AVE
Pit no pump and flex hose used
Completed
Yes
16
41
DIAGONAL
Roof drains to sanitary
Completed
Yes
17
2005
N MAIN ST
Roof drains to sanitary
Completed
Yes
18
245
KING
Shower to sump to outside
Completed
Yes
13
19
350
GAY
Exterior stairwell drains to sanitary
Completed
Yes
20
524
KAUFMANN AVE
Flex Hose Used to Discharge
Sump
Completed
Yes
21
380
LOWELL
Flex Hose Used to Discharge
Sump
Completed
Yes
22
492
KAUFMANN AVE
Sump pump connected to sanitary
sewer
Completed
Yes
23
315
KING
Sump pump connected to sanitary
sewer
Completed
Yes
24
875
COTTAGE PL
Yard and driveway drain to sanitary
Completed
Yes
25
821
LOWELL
Yard drain connected to sanitary
sewer
Completed
Yes
26
2360
CLARKE CREST DR
Sump pump drains to floor drain
Completed
Yes
27
2613
CENTRAL AVE
Yard drain connected to sanitary
sewer
Completed
Yes
28
49
DIAGONAL
Flex Hose Used to Discharge
Sump
Completed
Yes
29
2901
CENTRAL AVE
Flex Hose Used to Discharge
Sump
Completed
Yes
14
5.0 Smoke Testing
5.1 INVESTIGATION
Smoke testing is a quick and inexpensive method of detecting I &I sources in sewer systems. In July
of 2012, City crews performed smoke testing in Sewershed 7. They identified both private property
and public sewer utility issues including possible sanitary sewer system joint and pipe failures,
possible storm sewer catch basin connections, along with possible cracks, leaks or breaks in a
property owner's sanitary service laterals.
As smoke testing is a widely visible inspection of the sanitary sewer system, the City conducts an
extensive public relations effort to prevent concern or confusion associated with visible smoke.
Public information notices are published in the local newspaper and on the City of Dubuque's
website prior to testing. Along with the public notices, each resident in the area being smoke tested
receives a letter in the mail along with a door hanger 24 hours prior to testing. The information is
distributed to inform residents of the smoke testing's purpose and timing. The notice also reminded
residents to fill unused drains with water to avoid having smoke enter their homes.
Twelve gallons of liquid smoke and ten smoke bombs were used at key manholes in the sanitary
sewer system. At each location, a blower was placed over the opening of the manhole, introducing
air and smoke into the sanitary sewer system, thereby forcing smoke through the connected sewer
lines. The supply of smoke was continuous until the area was thoroughly examined and any defects
recorded. Each smoke testing site was able to cover a range of approximately 500 -1000 linear feet
in each direction.
5.2 CORRECTIVE ACTIONS
In Sewershed 7, storm sewer intakes along Kaufmann Avenue were found to have the most
significant defects. Significant smoke was detected from catch basins along Kaufmann Avenue
between Hempstead Street and Central Avenue. This could be due to direct cross connections
between the storm and sanitary sewers or indirectly from cracks and open joints in the sewer lines
in close proximity to the catch basin.
Cracked and missing cleanout covers, directly connected downspouts, and possible broken sanitary
sewer service laterals were all noted. Smoke seen around manholes in timber areas of the sanitary
lines revealed manhole castings without adequate seals. Open pick -hole manhole lids were also
noted in many areas.
15
Table 5 -1 Sanitary Sewer Smoke Testing - Private Property Defects
Line
No.
House
No.
Street Name
Ownership
Smoke Observed from:
Corrective Action
1
2761
BROADWAY ST
Private
the yard outside the house
above a broken sanitary
lateral
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
2
2685
BROADWAY ST
Private
the yard outside the house
above a broken sanitary
lateral
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
3
2623
BROADWAY ST
Private
a water stop box
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
4
2528
BROADWAY ST
Private
a downspout
Notify property owner to disconnect
downspout.
5
2445
BROADWAY ST
Private
a sanitary sewer cleanout
Notify property owner to replace or repair
clean out.
6
2247
CENTRAL AVE
Private
a downspout
Notify property owner to disconnect
downspout.
7
2247
CENTRAL AVE
Private
a driveway drain
Notify property owner to disconnect
driveway drain
8
2917
CENTRAL AVE
Private
a sanitary sewer cleanout
Notify property owner to replace or repair
clean out.
9
2615
CENTRAL AVE
Private
yard drain alongside of
house direct connection to
san
Notify property owner to disconnect area
drain.
10
2691
CENTRAL AVE
Private
smoke coming from
foundation by plant
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
11
2687
CENTRAL AVE
Private
smoke leaking up from
stairs
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
One hundred and thirty one (131) defects were identified in Sewershed 7. Photos were taken of
each and mapped. City staff has classified the results into categories to be further investigated and
repaired: private property investigation and repairs; private property lateral investigation and
repairs, public sanitary sewer and storm sewer investigation and repairs; and storm sewer catch
basin investigation and repairs.
5.2.1 Private Property
Forty -eight (48) private property issues were identified during smoke testing. Of the 48 sites,
twenty -eight (28) are most likely related to sanitary sewer lateral defects. Table 5 -1, lists the 48
private property sites showing possible private property defects along with the observations made
during smoke testing and the corrective action required. Identifying the source of I &I in a sanitary
sewer lateral can be especially difficult and expensive for an individual property owner. In the City's
budget, funds may be available for financial assistance for work completed on a private sanitary
sewer lateral, each year a request is made to fund these line items, however they are subject to
availability and are on a first come first served basis.
16
12
2601
CENTRAL AVE
Private
smoke coming from
foundation, possible broken
lateral
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
13
2535
CENTRAL AVE
Private
a private manhole with
sanitary lateral flowing
through
Notify property owner to replace or repair
manhole.
14
2523
CENTRAL AVE
Private
a private sanitary sewer
manhole
Notify property owner to replace or repair
manhole.
15
2326
CENTRAL AVE
Private
along the building
foundation
Televise sanitary service lateral during dye
test. Repair /replace lateral as needed.
16
2326
CENTRAL AVE
Private
along the building
foundation
Televise sanitary service lateral during dye
test. Repair /replace lateral as needed.
17
2326
CENTRAL AVE
Private
along the building
foundation
Televise sanitary service lateral during dye
test. Repair /replace lateral as needed.
18
2326
CENTRAL AVE
Private
a sanitary sewer manhole,
as well as the yard around
the lateral
Notify property owner to replace or repair
manhole.
19
2306
CENTRAL AVE
Private
along the building
foundation
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
20
2455
CLARKE CREST
DR
Private
a downspout
Notify property owner to disconnect
downspout.
21
2455
CLARKE CREST
DR
Private
a downspout
Notify property owner to disconnect
downspout.
22
1275
CLARKE DR
Private
a broken lateral clean out
Notify property owner to replace or repair
clean out.
23
1275
CLARKE DR
Private
a broken lateral clean out
Notify property owner to replace or repair
clean out.
24
1275
CLARKE DR
Private
a broken lateral clean out
Notify property owner to replace or repair
clean out.
25
995
CLARKE DR
Private
a broken lateral clean out
Notify property owner to replace or repair
clean out.
26
945
CLARKE DR
Private
a leaking clean out or
broken lateral
Televise sanitary service lateral during dye .
test and /or Repair /replace lateral as
needed.
27
672
CLARKE DR
Private
a private sanitary lateral,
around the water stop box
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
28
2815
DAVENPORT ST
Private
a downspout
Notify property owner to disconnect
downspout.
29
57
DIAGONAL ST
Private
the yard outside the house
above a broken sanitary
lateral
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
30
2244
FRANCIS ST
Private
the yard outside the house
above a broken sanitary
lateral
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
31
2252
FRANCIS ST
Private
a pvc pipe sticking out of
the ground
Notify property owner to replace or repair
clean out.
32
2593
FULTON ST
Private
the yard outside the house
above a broken sanitary
lateral
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
33
2617
FULTON ST
Private
the yard outside the house
above a broken sanitary
lateral
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
34
2131
HEEB ST
Private
the yard outside the house
above a broken sanitary
lateral
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
17
35
2186
HODGDON ST
Private
a leaking sanitary sewer
manhole
Notify property owner to replace or repair
manhole.
36
526
KAUFMANN AVE
Private
back of the curb in yard
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
37
366
KAUFMANN AVE
Private
along drive way where
wood retaining wall is
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
38
370
KAUFMANN AVE
Private
a retaining wall
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
39
370
KAUFMANN AVE
Private
a retaining wall
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
40
390
KAUFMANN AVE
Private
concrete stairs
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
41
410
KAUFMANN AVE
Private
retaining wall
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
42
430
KAUFMANN AVE
Private
retaining wall
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
43
400
KAUFMANN AVE
Private
the yard outside the house
above a broken sanitary
lateral
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
44
850 _
LOWELL ST
Private
a private sanitary sewer
clean out
Notify property owner to replace or repair
clean out.
45
468
LOWELL ST
Private
the yard outside the house
above a broken sanitary
lateral
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
46
452
LOWELL ST
Private
a downspout
Notify property owner to disconnect
downspout.
47
2750
MUSCATINE ST
Private
the yard behind the curb
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
48
808
SPIRES DR
Private
smoke coming from yard,
possible broken lateral
Televise sanitary service lateral during dye
test and /or Repair /replace lateral as
needed.
The City will consider the private repairs listed in Table 5 -1 similar to the failed private property
inspections — property owners will be notified by letter, asked to correct the issue, and City staff will
perform re- inspections ensure the repair was done correctly.
5.2.2 Public (City Right of Way) Property
Smoke testing revealed eighty -three (83) public sites where defects were related to the public
sanitary sewer and storm sewer systems. Table 5 -2 shows sanitary sewer system defects where
there are possible broken or cracked pipes, vented manhole lids, and possible inadequately sealed
manholes. Table 5 -3 lists defects in the storm sewer system where smoke was observed at twenty -
nine (29) storm sewer catch basins. The smoke present at the catch basins may present a possible
direct connection to the sanitary sewer system through the previously mentioned cracks or breaks
in the sanitary sewer. Section 6 of this report outlines sanitary sewer manhole improvements.
Sanitary sewer replacement or rehabilitation is detailed in Section 8 and is based on the smoke
testing observations, CCTV sanitary sewer reports, and flow monitoring data.
18
Table 5 -2 Sanitary Sewer Smoke Testing: Public Property - Sanitary Sewer
Line
No.
Nearest St. Address
Ownership
Observation
Corrective Action
1
2701
BROADWAY ST
Public
New water valve installed, smoke
coming up from valve body
Televise sanitary sewer near
water valve. Repair sewer as
needed.
2
2524
BROADWAY ST
Public
open pickhole MH lid
Replace manhole lid
3
335
BURLINGTON ST
Public
Smoke coming from water valve
box
Televise sanitary sewer near
water valve. Repair as
needed.
4
335
BURLINGTON ST
Public
open pickhole MH lid
Replace manhole lid
5
335
BURLINGTON ST
Public
Open pickhole MH lid
Replace manhole lid
6
2901
CENTRAL AVE
Public
open pick hole MH lid
Replace manhole lid
7
2540
CENTRAL AVE
Public
Quest utility manhole
Televise sanitary sewer near
utility. Repair sewer as
needed.
8
1005
CLARKE CREST CT
Public
open pick hole MH lid
Replace manhole lid
9
2525
CLARKE CREST DR
Public
open pick hole MH lid
Replace manhole lid
10
2530
CLARKE CREST DR
Public
Missing manhole cover bolt
Install new bolt
11
2470
CLARKE CREST DR
Public
open pick hole MH lid
Replace manhole lid
12
2480
CLARKE CREST DR
Public
Open pick hole MH lid
Replace manhole lid
13
2320
CLARKE CREST DR
Public
Open pick hole MH lid
Replace manhole lid
14
998
CLARKE CREST DR
Public
Open pick hole MH lid
Replace manhole lid
15
2240
CLARKE CREST DR
Public
open pick hole MH
Replace manhole lid
16
2540
CLARKE CREST DR
Public
smoke coming from under
manhole casting
Apply sealant to manhole
casting
17
2540
CLARKE CREST DR
Public
smoke coming from under
manhole casting
Apply sealant to manhole
casting
18
2540
CLARKE CREST DR
Public
smoke coming from under
manhole casting
Apply sealant to manhole
casting
19
2540
CLARKE CREST DR
Public
smoke coming from under
manhole casting
Apply sealant to manhole
casting
20
1275
CLARKE DR
Public
Smoke coming from behind curb
Apply sealant to manhole
casting
21
1275
CLARKE DR
Public
Smoke coming from crack in
street
Televise sanitary sewer along
street. Repair /rehabilitate
sewer as needed.
22
1275
CLARKE DR
Public
smoke coming from crack in
street
Televise sanitary sewer along
street. Repair /rehabilitate
sewer as needed.
19
23
2443
DIVISION ST
Public
open pick hole MH lid
24
908
FARRELL CT
Public
smoke coming from around rim of
MH
25
910
FARRELL CT
Public
smoke coming from manhole lid
and from under rim
26
910
FARRELL CT
Public
smoke leaking from under rim of
manhole casting
27
2295
FOYE ST
Public
Smoke coming from around
concrete around MH
Replace manhole lid
Apply sealant to manhole
casting
Apply sealant to manhole
casting
Apply sealant to manhole
casting
Inspect manhole chimney.
Repair /rehabilitate as
needed.
28
2230
FRANCIS ST
Public
alley way between Francis and
central behind 2230 Francis
29
630
HAROLD ST
Public
Smoke coming from around
concrete around MH
Replace manhole lid
Inspect manhole chimney.
Repair /rehabilitate as
needed.
30
2464
HEMPSTEAD ST
Public
Smoke coming from around MH
and yard around driveway
Replace manhole lid
31
2320
HEMPSTEAD ST
Public
Smoke coming from around MH
Replace manhole lid
32
836
KAUFMANN AVE
Public
Smoke coming from around
concrete ring around MH
Inspect manhole chimney.
Repair /rehabilitate as
needed.
33
828
KAUFMANN AVE
Public
San Sewer main running up to
Ferrel Ct.
Televise sanitary sewer in
location. Examine flow data.
Repair /rehab as needed.
34
530
KAUFMANN AVE
Public
the back of curb in yard
Televise sanitary sewer in
location. Examine flow data.
Repair /rehab as needed.
35
530
KAUFMANN AVE
Public
the back of curb in yard
Televise sanitary sewer in
location. Examine flow data.
Repair /rehab as needed.
36
524
KAUFMANN AVE
Public
smoke coming from curb and
gutter possible broken lateral
Televise sanitary sewer in
location. Examine flow data.
Repair /rehab as needed.
37
2145
KLEINE ST
Public
South West corner of Kleine and
Chapel Ct. Smoke coming from
back of curb
Televise sanitary sewer in
location. Examine flow data.
Repair /rehab as needed.
38
806
LACEY CT
Public
smoke bleeding up from grass
around MH
Inspect manhole chimney.
Repair /rehabilitate as
needed.
39
750
MONTCREST ST
Public
Smoke coming from cracks in
street
Televise sanitary sewer in
location. Examine flow data.
Repair /rehab as needed.
40
750
MONTCREST ST
Public
Smoke coming from cracks in
street
Televise sanitary sewer in
location. Examine flow data.
Repair /rehab as needed.
41
0
MONTCREST ST
Public
Smoke coming from cracks in
street
Televise sanitary sewer in
location. Examine flow data.
Repair /rehab as needed.
42
0
MONTCREST ST
Public
Smoke coming from grass by
curb
Televise sanitary sewer in
location. Examine flow data.
Repair /rehab as needed.
43
0
MONTCREST ST
Public
corner of Montcrest and
Hempstead Smoke coming from
around concrete around MN
Replace manhole lid
44
505
NAPIER ST
Public
smoke coming out from around
concrete around MH
Inspect manhole chimney.
Repair /rehabilitate as
needed.
20
45
2742
PLEASANT VIEW DR
Public
smoke coming from under
manhole casting
Inspect manhole chimney.
Repair /rehabilitate as
needed.
46
701
RAVENWOOD CT
Public
open pick hole MH lid
Replace manhole lid
47
707
RAVENWOOD CT
Public
Open pick hole MH lid
Replace manhole lid
48
2425
SPIRES CT
Public
smoke coming from crack in
street
Televise sanitary sewer in
location. Examine flow data.
Repair /rehab as needed.
49
2460
SPIRES CT
Public
Smoke coming from grass
around manhole
Inspect manhole chimney.
Repair /rehabilitate as
needed.
50
2420
SPIRES CT
Public
smoke coming from under
manhole casting
Inspect manhole chimney.
Repair /rehabilitate as
needed.
51
2400
SPIRES CT
Public
smoke coming from under
manhole casting
Inspect manhole chimney.
Repair /rehabilitate as
needed.
52
808
SPIRES DR
Public
smoke coming from under
manhole casting
Inspect manhole chimney.
Repair /rehabilitate as
needed.
53
807
SPIRES DR
Public
smoke coming from under
manhole casting
Inspect manhole chimney.
Repair /rehabilitate as
needed.
54
2709
VENTURA DR
Public
open pick hole MH lid
Replace manhole lid
Table 5 -3 Sanitary Sewer Smoke Testing: Public Property — Storm Sewer Catch Basins
Line
No.
Nearest St. Address
Ownership
Observation
Corrective Action
1
2609
BROADWAY ST
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
2
2604
BROADWAY ST
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
3
2600
BROADWAY ST
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
4
2575
BROADWAY ST
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
5
2550
BROADWAY ST
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
6
2887
CENTRAL AVE
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
7
2571
CENTRAL AVE
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
8
0
CENTRAL AVE
Public
SW corner of 24th and
central, in front of Bus Barn
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
9
2403
CENTRAL AVE
Public
NW corner of 24th and
Central smoke coming from
catch basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
10
2400
CENTRAL AVE
Public
NE Corner of 24th and
Central smoke coming from
catch basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
21
11
2360
CENTRAL AVE
Public
SE corner of 24th and Central
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
12
2311
CENTRAL AVE
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
13
2277
CENTRAL AVE
Public
SW corner of W23rd and
Central smoke coming from
catch basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
14
796
KAUFMANN AVE
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
15
520
KAUFMANN AVE
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
16
496
KAUFMANN AVE
Public
South East Corner of
Hempstead and Kaufmann
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
17
499
KAUFMANN AVE
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
18
361
KAUFMANN AVE
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
19
330
KAUFMANN AVE
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
20
290
KAUFMANN AVE
Public
South East corner of Kleine
and Kaufmann smoke coming
from catch basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
21
290
KAUFMANN AVE
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
22
230
KAUFMANN AVE
Public
south west corner of N Main
and Kaufmann smoke coming
from catch basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
23
120
KAUFMANN AVE
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
24
0
KAUFMANN AVE
Public
Corner of Francis and
Kaufmann smoke coming
from catch basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
25
191
KAUFMANN AVE
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
26
305
KAUFMANN AVE
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
27
2155
N MAIN ST
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
28
806
LOWELL ST
Public
smoke coming from catch
basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
29
2303
WOODWORTH
ST
Public
NW corner of Woodworth and
Lowell smoke coming from
catch basin
Dye test catch basin /CCTV San.
Sewer/ and /or Repair or Rehab.
Sewer as needed.
22
6.0 Manhole Observations
6.1 INVESTIGATION
There are 243 sanitary sewer manholes in Sewershed 7: 242 are considered to be owned and
maintained by the City and one is private. The 242 manholes operated by the City were inspected
and defects documented. Manholes listed in this section were either observed as having defects
during smoke testing, visual inspection, or are documented in the City's GIS database. Smoke
testing presented faulty characteristics including manhole lids with open pick holes and locations
where sealant material was either missing or had deteriorated over time allowing smoke to come to
the surface. Following smoke testing, City crews conducted visual manhole inspections and
combined with the GIS records, staff documented 69 brick manholes. Most were recorded as
having a notable condition rating of 'very poor', 'poor' and 'in need of repair, rehabilitation, or
replacement'. Brick manholes are of great I &I concern as they are older and mortar used to secure
the brick typically has deteriorated allowing for seepage and infiltration of groundwater.
6.2 CORRECTIVE ACTIONS
The City will begin repairs, rehabilitation, or replacement starting with manholes that can be
repaired as shown in Table 6 -1, and those with a higher criticality rating demonstrating high
infiltration and high risk failure in a health and safety area, i.e. streets, these are listed in Table 6 -2.
Table 6 -2 lists 17 brick manholes that are in significant need of rehabilitation or replacement. The
projects listed in Tables 6 -1 and 6 -2 can be completed in tandem to increase effectiveness of the
repair. The remaining 52 brick manholes will continue to be observed and placed on future capital
improvement budgets.
Table 6 -1 Manholes Scheduled for Repair (from July 2012 Smoke Testing)
Line No.
Location
Nearest St. Address
Ownership
Observation
Corrective Action
1
SAN S 06329
2524
BROADWAY ST
Public
open pickhole MH lid
Replace manhole
lid
2
SAN S 06471
335
BURLINGTON ST
Public
open pickhole MH lid
Replace manhole
lid
3
SAN S 06469
335
BURLINGTON ST
Public
Open pickhole MH lid
Replace manhole
lid
4
SAN S 06615
2901
CENTRAL AVE
Public
open pick hole MH lid
Replace manhole
lid
5
SAN S 06222
1005
CLARKE CREST CT
Public
open pick hole MH lid
Replace manhole
lid
23
6 SAN S 06241
2525
CLARKE CREST DR
Public
open pick hole MH lid
Replace manhole
lid
7 SAN S 06242
2530
CLARKE CREST DR
Public
Missing manhole cover
bolt
Install new bolt
8 SAN S 06245
2470
CLARKE CREST DR
Public
open pick hole MH lid
Replace manhole
lid
9 SAN S 06244
2480
CLARKE CREST DR
Public
Open pick hole MH lid
Replace manhole
lid
10 SAN S 06219
2320
CLARKE CREST DR
Public
Open pick hole MH lid
Replace manhole
lid
11 SAN S 05508
995
CLARKE CREST DR
Public
Open pick hole MH lid
Replace manhole
lid
12 SAN S 06225
2240
CLARKE CREST DR
Public
open pick hole MN
Replace manhole
lid
13 SAN S 06242
2540
CLARKE CREST DR
Public
smoke coming from
under manhole casting
Apply sealant to
manhole casting
14 SAN S 06242
2540
CLARKE CREST DR
Public
smoke coming from
under manhole casting
Apply sealant to
manhole casting
15 SAN S 06242
2540
CLARKE CREST DR
Public
smoke coming from
under manhole casting
Apply sealant to
manhole casting
16 SAN S 06242
2540
CLARKE CREST DR
Public
smoke coming from
under manhole casting
Apply sealant to
manhole casting
17 SAN S 07011
1275
CLARKE DR
Public
Smoke coming from
behind curb
Apply sealant to
manhole casting
18 SAN S 06333
2443
DIVISION ST
Public
open pick hole MH lid
Replace manhole
lid
19 SAN S 06238
908
FARRELL CT
Public
smoke coming from
around rim of MH
Apply sealant to
manhole casting
20 SANS 06238
910
FARRELL CT
Public
smoke coming from
manhole lid and from
under rim
Apply sealant to
manhole casting
21 SAN S 06238
910
FARRELL CT
Public
smoke leaking from
under rim of manhole
casting
Apply sealant to
manhole casting
22 SAN S 06276
2295
FOYE ST
Public
Smoke coming from
around concrete around
MH
Inspect manhole
chimney.
Repair /rehabilitate
as needed.
23 SAN S 04678
2230
FRANCIS ST
Public
alley way between
francis and central
behind 2230 francis
Replace manhole
lid
24 SAN S 05483
2282
HAROLD ST
Public
Smoke coming from
around concrete around
MH
Inspect manhole
chimney.
Repair /rehabilitate
as needed.
25 SAN S 05471
2464
HEMPSTEAD ST
Public
Smoke coming from
around MH and yard
around driveway
Replace manhole
lid
26 SAN S 05478
2320
HEMPSTEAD ST
Public
Smoke coming from
around MH
Replace manhole
lid
27 SAN S 06774
836
KAUFMANN AVE
Public
Smoke coming from
around concrete ring
around MH
Inspect manhole
chimney.
Repair /rehabilitate
as needed.
24
28
SAN S 06235
806
LACEY CT
Public
smoke coming up from
grass around MH
Inspect manhole
chimney.
Repair /rehabilitate
as needed.
29
SAN S 05466
750
MONTCREST ST
Public
corner of Montcrest and
Hempstead Smoke
coming from around
concrete around MH
Replace manhole
lid
30
SAN S 06273
505
NAPIER ST
Public
smoke coming out from
around concrete around
MH
Inspect manhole
chimney.
Repair /rehabilitate
as needed.
31
SAN S 06374
2742
PLEASANT VIEW DR
Public
smoke coming from
under manhole casting
Inspect manhole
chimney.
Repair /rehabilitate
as needed.
32
SAN S 06243
701
RAVENWOOD CT
Public
open pick hole MH lid
Replace manhole
lid
33
SAN S 06247
707
RAVENWOOD CT
Public
Open pick hole MH lid
Replace manhole
lid
34
SAN S 06254
2460
SPIRES CT
Public
Smoke coming from
grass around manhole
Inspect manhole
chimney.
Repair /rehabilitate
as needed.
35
SAN S 06253
2420
SPIRES CT
Public
smoke coming from
under manhole casting
Inspect manhole
chimney.
Repair /rehabilitate
as needed.
36
SAN S 06260
2400
SPIRES CT
Public
smoke coming from
under manhole casting
Inspect manhole
chimney.
Repair /rehabilitate
as needed.
37
SAN S 06257
808
SPIRES DR
Public
smoke coming from
under manhole casting
Inspect manhole
chimney.
Repair /rehabilitate
as needed.
38
SAN S 06256
807
SPIRES DR
Public
smoke coming from
under manhole casting
Inspect manhole
chimney.
Repair /rehabilitate
as needed.
39
SAN S 06361
2709
VENTURA DR
Public
open pick hole MH lid
Replace manhole
lid
Table 6 -2 Brick Manholes Scheduled for Rehabilitation or Replacement
Line
No.
Manhole ID
Location
Lid /Cover Type
Manhole
Type
MH
Condition
1
SAN S 04673
ALLEY BEHIND
HARTIG DRUG
CENTRAL AVE
Concealed Pickhole - Not Bolted
Brick
Poor
2
SANS 04679
ALLEY BEHIND
HARTIG DRUG
CENTRAL AVE
Open Pickhole - Not Bolted
Brick
Poor
3
SAN S 06277
behind 338
Kaufmann
CHAPEL CT
Concealed Pickhole - Not Bolted
Brick
Unk
4
SANS 06312
2421
DIVISION ST
Concealed Pickhole - Not Bolted
Brick
Poor
5
SAN S 06333
2443
DIVISION ST
Open Pickhole - Not Bolted
Brick
Poor
6
SAN S 06288
@ Lowell
FOYE ST
Concealed Pickhole - Not Bolted
Brick
Poor
7
SAN S 04680
51
KAUFMANN AVE
Concealed Pickhole - Not Bolted
Brick
Poor
25
8
SAN S 06271
@ Foye
LOWELL ST
Concealed Pickhole - Not Bolted
Brick
Poor
9
SAN S 06272
480
LOWELL ST
Concealed Pickhole - Not Bolted
Brick
Poor
10
SAN S 06283
546
LOWELL ST
Concealed Pickhole - Not Bolted
Brick
Poor
11
SAN S 06289
ROSEALINE
LOWELL ST
Concealed Pickhole - Not Bolted
Brick
Poor
12
SAN S 06290
430
LOWELL ST
Concealed Pickhole - Not Bolted
Brick
Poor
13
SAN S 06293
@ Paul St
LOWELL ST
Concealed Pickhole - Not Bolted
Brick
Poor
14
SAN S 06294
364
LOWELL ST
Concealed Pickhole - Not Bolted
Brick
Poor
15
SAN S 06295
315
LOWELL ST
Concealed Pickhole - Not Bolted
Brick
Poor
16
SAN S 04674
70
W 23RD ST
Concealed Pickhole - Not Bolted
Brick
Poor
17
SAN S 06314
Division St
W 24TH ST
Concealed Pickhole - Not Bolted
Brick
Poor
26
7.0 Flow Metering
7.1 INVESTIGATION
City crews started flow metering in Sewershed 7 in 2012 and completed flow monitoring in 2013
after it was determined from smoke testing and CCTV reports there were several areas that would
benefit from additional flow data. Sewershed 7 comprises two separate drainage basins and should
be flow monitored at two different exit locations. To avoid confusion in determining what part of
the collection system is flowing through each of the two exit flow meters, the area is referenced as
Sewershed 7A and Sewershed 7B for flow data reporting purposes.
The area defined as Sewershed 7A is located north of Kaufmann Avenue and flanked by a bluff to
the west and Central Avenue to the east and extends as far north as Stoltz Street. Notable
characteristics of the area are the presence older, historic homes on Broadway Street, Fulton School
including playing fields, and a portion of Central Avenue which is a main thoroughfare for travel and
commerce. The majority of the sanitary sewer system comprises eight (8) diameter vitrified clay
pipe installed prior to 1940. During home inspections, several properties had sump pumps
connected to the sanitary sewer; many of these have since been disconnected as shown in Table 4-
1. Only three connected sump pumps remain, and the City is currently following the procedure
defined earlier in this report. The City is working with two property owners who have a downspout
and stairwell drain connected.
The area defined as Sewershed 7B is located west of Central Avenue and follows Kaufmann Avenue
to the west, and is bordered by Clarke Drive and Aspen Drive. The most notable characteristic in
Sewershed 7B is Clarke University and its grounds. The majority of the sanitary sewer system
consists of eight (8) diameter vitrified clay pipe installed prior to 1940. Sewershed 7B borders
Sewershed 7A just north of 24th Street.
The City added nine flow meters to the existing inventory, thereby enabling staff to set a master
meter for Sewershed 7A and 7B with sub - meters set at key locations upstream of the master
meters. Section 7.2 and 7.3 details the results of the recent flow metering.
7.2 SEWERSHED 7A FLOW DATA ANALYSIS
Documentation supporting the following analysis may be found in Appendix A. Appendix A includes
a location map showing the flow meter sites, drainage area, and remaining private property fail
locations.
27
Three flow meters were deployed into Sewershed 7A, one master and two upstream at key
locations that would intercept main feeds prior to the master meter. The master meter is labeled
White Street next to Fulton, the two upstream meters are referenced as 2586 Central and 46
Diagonal, representing the nearest address.
In 2013, data was collected between July 17th and October 18th. Throughout the data collection
period a seven -day dry timeframe was captured providing a summer average dry weather flow
(ADF) rate of 0.173MGD for the master meter on White Street next to Fulton; the summer ADF for
2586 Central is 0.013MGD; and the summer ADF for 46 Diagonal is 0.041MGD. During that time
two measurable storm events were captured; one on August 22nd and the second on August 31St
In each event, the maximum recorded rain depth measured 0.5inch. The following is a summary of
the data collected:
Table 7 -1 Sewershed 7A 2013 Measurable Storm Event Data
From the data presented, the peak flow is relatively instantaneous, which is typically indicative of
direct inflow. As such, efforts are directed to assisting property owners to disconnect the remaining
sump pumps connected to the sanitary sewer and the downspout connected at 2444 Broadway
These connections may be partially responsible for the 17% increase between the August 31st event
and the average dry weather flow captured through the '46 Diagonal' meter.
7.3 SEWERSHED 7B FLOW DATA ANALYSIS
Documentation supporting the following analysis may be found in Appendix B. Appendix B includes
a location map showing the flow meter sites, drainage area, and remaining private property fail
locations.
In 2013, flow monitoring for area 7B started in July, with the latest meter download taken in mid -
October. Combined with the flow data from 2012, there were several key findings during the
metering period. A master meter was set in a manhole in close proximity to 2404 White Street, with
28
Summer Average
Dry Weather Flow
Rate ADF (MGD)
August 22, 2013
(0.99Rain Event: 0.5in) Total
in / Peak
Max. Flow Rate, MGD
August 31, 2013
(Rain Event: Total
2.43in /Peak 0.5in)
Max. Flow Rate, MGD
Master Meter: White
St. Next to Fulton
0.173
0.500
0.800
Meter: 2586 Central
0.013
0.070
0.126
Meter: 46 Diagonal
0.041
0.090
0.350
Table 7 -1 Sewershed 7A 2013 Measurable Storm Event Data
From the data presented, the peak flow is relatively instantaneous, which is typically indicative of
direct inflow. As such, efforts are directed to assisting property owners to disconnect the remaining
sump pumps connected to the sanitary sewer and the downspout connected at 2444 Broadway
These connections may be partially responsible for the 17% increase between the August 31st event
and the average dry weather flow captured through the '46 Diagonal' meter.
7.3 SEWERSHED 7B FLOW DATA ANALYSIS
Documentation supporting the following analysis may be found in Appendix B. Appendix B includes
a location map showing the flow meter sites, drainage area, and remaining private property fail
locations.
In 2013, flow monitoring for area 7B started in July, with the latest meter download taken in mid -
October. Combined with the flow data from 2012, there were several key findings during the
metering period. A master meter was set in a manhole in close proximity to 2404 White Street, with
28
sub - meters near 400 Kaufmann and 524 Kaufmann. Unlike Sewershed 7A, the sub - meters are in line
along the same sanitary sewer. Upstream of the meter at 524 Kaufmann is traditional residential,
between 524 and 400 Kaufmann is Clarke University and its residences, and between 400 Kaufmann
and the master meter at 2404 White is residential. Clarke University was dye tested for cross
connections in 2011 as part of the Sewershed 11 report; there were no cross connections identified
during the investigation. The City did however discover between 400 Kaufmann and the master
meter, that there are two storm sewers potentially crossing sanitary sewer laterals running parallel
to the sanitary sewer. Similar to data collected for Sewershed 7A, a seven day dry period was
captured providing a summer average dry weather flow (ADF) rate of 0.095MGD for the master
meter at 2404 White; the summer ADF for 400 Kaufmann is 0.054MGD; and the summer ADF for
524 Kaufmann* is 0.016MGD. During the 2013 monitoring period, two measurable storm events
were captured; one on August 22nd and the second on August 31St. In each event, the maximum
recorded rain depth measured 0.5inch. The following is a summary of the data collected:
Table 7 -2 Sewershed 7 B 2013 Measurable Storm Event Data
*524 Kaufmann meter was set later in the summer, so only a partial dry period was used. The flow
data is however consistent for traditional diurnal flows without anomalies, and so it was used for
comparison in this metering period.
During either rain events, the farthest upstream meter located near 524 Kaufmann shows only a
slight increase above the average dry weather flow. As the City continues to monitor this area it will
be determined if the 40,000 to 50,000 gallon increase would be considered within the allowable I &I
criteria. Moving down the line to the meter near 400 Kaufmann, the flows rise from 54,000 gallons
to 160,000 gallons in the short duration low intensity rain event. Most notable is the increase in
flow during the August 31st event where the meter at 2404 White detected an increase of 1,400,000
gallons of flow compared to the ADF. To ensure these readings truly represent the flows throughout
29
Summer Average Dry
Weather Flow Rate
ADF (MGD)
August 22, 2013
(Rain Event: Total 0.99in
Peak 0.5in)
Max. Flow Rate, MGD
August 31, 2013
(Rain Event: Total 2.43in
Peak O.5in)
Max. Flow Rate, MGD
Master Meter: 2404
White
0.095
0.310
1.500
Meter: 400 Kaufmann
0.054
0.160
0.340
Meter: 524 Kaufmann*
0.016
0.055
0.065
Table 7 -2 Sewershed 7 B 2013 Measurable Storm Event Data
*524 Kaufmann meter was set later in the summer, so only a partial dry period was used. The flow
data is however consistent for traditional diurnal flows without anomalies, and so it was used for
comparison in this metering period.
During either rain events, the farthest upstream meter located near 524 Kaufmann shows only a
slight increase above the average dry weather flow. As the City continues to monitor this area it will
be determined if the 40,000 to 50,000 gallon increase would be considered within the allowable I &I
criteria. Moving down the line to the meter near 400 Kaufmann, the flows rise from 54,000 gallons
to 160,000 gallons in the short duration low intensity rain event. Most notable is the increase in
flow during the August 31st event where the meter at 2404 White detected an increase of 1,400,000
gallons of flow compared to the ADF. To ensure these readings truly represent the flows throughout
29
this area, the City will continue metering at the current locations. In addition, staff will continue
their research into understanding the area and any possible underground spring or water issues.
Local knowledge shows that within the drainage area for the meter at 400 Kaufmann, there have
been some sinkholes located on Lowell Street, and it is unclear as to what is causing the sinkholes.
Corrective actions based on these findings, the smoke testing results, private property inspections,
and the NASSCO pipe results are reported in Section 8 Sanitary Sewer Rehabilitation.
30
8.0 Sanitary Sewer Rehabilitation and Replacement
8.1 SANITARY SEWER INVESTIGATION
There are approximately 46,870 lineal feet or 8.8 miles of sanitary sewer in Sewershed 7. In
evaluating the sanitary sewers in terms of the NASSCO pipe condition rating, smoke testing data,
local knowledge, and flow monitoring data, the area most critical in terms of inflow was the area
between Hempstead Avenue and Central Avenue along Kaufmann Avenue, and the drainage area
which drains to this location. It is located in area 7B and flow monitored near 400 Kaufmann and
2404 White. The flow monitoring data in addition to the local public works knowledge and smoke
testing provided sufficient information with which a capital improvement plan could be derived for
the Corrective Action listed in Section 8.2 below. Further corrective actions may be necessary as
continued flow monitoring may identify additional improvements, which will be placed on future
budget cycles.
8.2 CORRECTIVE ACTIONS
Based on the sanitary investigations, the City is recommending the rehabilitative technique of
cured -in- place -pipe (CIPP) for approximately 2,821 lineal feet along with any necessary point repairs
and sanitary sewer lateral liners. Table 8 -1 lists the location and pipe lengths scheduled for
rehabilitation. For budgetary estimating purposes and to account for contingency, the lineal footage
is rounded up to 3,000.
Table 8 -1 Sanitary Sewer Rehabilitation Schedule 2014 -2015
Sewershed
Sub Area
Pipe Name
U/S Manhole
D/S Manhole
Street Location
Diameter,
Inches
Length,
Feet
7 - -1
SAN P 05183
SAN S 04771
SAN S 04769
Kaufmann Ave.
12
385
7 - -1
SAN P 05189
SAN S 04769
SAN S 04767
Kaufmann Ave.
12
255
7 - -1
SAN P 05193
SAN S 04767
SAN S 04684
Kaufmann Ave.
12
265
7 - -1
SAN P 05195
SAN S 04684
SAN S 04682
Kaufmann Ave.
12
164
7 - -1
SAN P 05197
SAN S 04682
SAN S 04681
Kaufmann Ave.
12
76
7 - -3
SAN P 06257
SAN S 05482
SAN S 05456
Lowell St.
6
179
7 - -3
SAN P 06258
SAN S 05456
SAN S 05455
Lowell St.
6
206
7 - -3
SAN P 06259
SAN S 05455
SAN S 05454
Lowell St.
8
238
7 - -3
SAN P 06260
SAN S 05454
SAN S 05453
Lowell St.
8
193
7 - -3
SAN P 06261
SAN S 05453
SAN S 05481
Lowell St.
8
105
7 - -3
SAN P 06268
SAN S 07424
SAN S 05481
Lowell St.
8
148
7 - -3
SAN P 07650
SAN S 05480
SAN S 07424
Lowell St.
8
265
31
7 - -3
SAN P 06277
SAN S 06285
SAN S 05480
Lowell St.
8
265
7 - -3
SAN P 06278
SAN S 06284
SAN S 06285
Lowell St.
8
77
In addition to the rehabilitative program, the City is budgeting for the full replacement of sanitary
sewer located on Heeb Street south of Kaufmann. The sanitary sewer has deteriorated to the point
where cured in place pipe is not feasible. The project will be coordinated with other City
departments to replace the water main and reconstruct the street.
32
9.0 Plan, Schedule, and Budget Summary
This plan addresses work to be conducted by the City and private property owners within
Sewershed 7. The plan is subject to approval by the US EPA and Iowa DNR.
9.1 FUNDING
The Capital Improvement Program (CIP) Budget represents the City of Dubuque's five year physical
development effort. The CIP attempts to address a variety of needs, which the City must meet if it is
to maintain its physical facilities, meet its service commitments, and provide for its future
development. The CIP Budget reflects the City's comprehensive plan and the goals and priorities
established by the City Council. The first year of the five -year CIP Budget goes into the budget for
the next year and deserves the most attention. The CIP Budget is updated each year so the City
Council has the opportunity to change the next four years and add a new year.
At this time, the CIP Budget is sufficient to fund the corrective actions identified in this plan.
However, the City reserves the right to adjust or remove corrective actions from this plan based
upon funding, further investigation, and future I &I- related priorities in other sewersheds.
9.2 BUDGET
The following table, Table 9 -1, lists the associated costs of the work necessary to progress toward
reducing inflow and infiltration into the sanitary sewer system.
Table 9 -1 Budgetary Estimate FY2015 for Sewershed 7
Item No.
General Description
Quantity
Unit
Est. Cost (YR2013)
Estimate
1
Manhole Repairs
39
EA
$1,000
$39,000
2
Manhole
Rehabilitation /Replacement
17
EA
$8,000
$136,000
3
Sanitary Sewer Rehabilitation plus
Point Repairs and Lateral
Rehabilitation
3,000
LF
$50*
$150,000
4
Sanitary Sewer Replacement
400
LF
$100
$40,000
4
Private Property Assistance
1
LS
$30,000
$30,000
5
Flow Monitoring
1
LS
$200,000
$200,000
*Price per foot includes point repairs and lateral lining
33
Estimated Total
$595,000.00
APPENDIX A
SEWERSHED 7A FLOW MONITORING DATA
THE CITY OF
DUB
Masterpiece on the Mississippi
Sewershed 7 A
Fail Locations
DAGIS
MIME ASIA GSOGtArNIC INroteonlON SYSTSM
402 Primrose
Stairwell drain
Central Meter
2777 Broadway
Sumppump to sanitary
Diagonal Meter
DISCLAIMER: This information was complied
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 table for any direct, Indirect, incidental,
consequential, punitive, or special damages, whether foreseeable or
unforeseeable, arising out of the authorized or unauthorized use of
this data or the inability to use this data or out of any breach of
warranty whatsoever.
200100 0
1 inch = 575 feet
200 400 600 800 Feet
W E
Map Prepared by:
City of Dubuque
Engineering Division
50 West 13th Street
Dubuque, Iowa 52001
Phone: (563) 589 -4270
Fax: (563) 589 -4205
0.005
0.004
A0.003
0.002
0.001
0.000
white street next to fulton
August 22 2013 Storm
Wet Total Flow (1.279 mgal):0.00
-Wet Flow Rate (0.183 mgd):0.10
DWF Total (1.228 mgal):0.00
ADWF Rate (0.175 mgd):0.12
Aug 2013
22 Thu 23 Fri 24 Sat 25 Sun
8/20/2013 12:00:00 AM - 8/27/2013 12:00:00 AM
Ave. Wet Flow Rate (0.183 mgd):0.10
white street next to fulton
August 22 2013 Storm
Ave. Dry Rate (0.173 mgd):0.13
Cumulative Rainfall (0.990 in):0.00
0.5
0.4
3, 0.3
0.2
0.1
0.0
0.3
0.2—
0.1
0.0
0.5
0.4
0.3
0.2
0.1
0.0
iolo*
1i4
Aug 2013
21 Wed 22 Thu 23 Fri 24 Sat 25 Sun
8/20/2013 12:00:00 AM - 8/27/2013 12:00:00 AM
26 Mon 27 Tue
0.0006
0.0004
2586 central
August 22 2013 Storm
Wet Total Flow (0.089 mgal):0.00
Ave.Wet Flow Rate (0.013 mgd):0.01
DWF Total (0.087 mgal):0.00
ADWF Rate (0.012 mgd):0.01
0.0000
- 0.0002
0.06
0.04
rn -
E 0.02—
0.00
-0.02
Aug 2013
t
21 Wed 22 Thu 23 Fri 24 Sat 25 Sun
8/20/2013 12:00:00 AM - 8/27/2013 12:00:00 AM
26 Mon
27 Tue
0.06
0.04
rn
F 0.02
0.00
-0.02
0.06
73, 0.04
Ave. Wet Flow Rate (0.013 mgd):0.01
2586 central
August 22 2013 Storm
Ave. Dry Rate (0.013 mgd):0.01 Cumulative Rainfall (0.990 in):0.00
0.02—
0.5-
0.4-
0.3--
0.2-
0.1-
0.0
i
Aug 2013
21 Wed 22 Thu 23 Fri 24 Sat 25 Sun
8/20/2013 12:00:00 AM - 8/27/2013 12:00:00 AM
26 Mon 27 Tue
0.0009
0.0008
0.0007
0.0006
rn
E 0.0005
0.0004
0.0003
0.0002
0.12
0.10
-a 0.08
0)
F
0.06
0.04
0.02
Aug 2013
46 Diagonal
August 22 2013 Storm
Wet Total Flow (0.279 mgal):0.00
A'EWet Flow Rate (0.040 mgd):0.05
DWF Total (0.283 mgal):0.00
ADWF Rate (0.040 mgd):0.04
22 Thu 23 Fri 24 Sat 25 Sun
8/20/2013 12:00:00 AM - 8/27/2013 12:00:00 AM
26 Mon
0.12
0.10
-a 0.08
rn
E 0.06
0.04
0.02
Ave. Wet Flow Rate (0.040 mgd):0.05
46 Diagonal
August 22 2013 Storm
Ave. Dry Rate (0.041 mgd):0.06
Cumulative Rainfall (0.990 in):0.00
0.05
0.5
0.4
0.3
c
0.2
0.1
0.0 '
21 Wed 22 Thu 23 Fri 24 Sat 25 Sun
Aug 2013
8/20/2013 12:00:00 AM - 8/27/2013 12:00:00 AM
26 Mon
27 Tue
white street next to fulton
August 31 2013 Storm
Wet Total Flow (1.363 mgal):0.00
RvE, Wet Flow Rate (0.195 mgd):0.14
DWF Total (1.228 mgal):0.00
ADWF Rate (0.175 mgd):0.12
0.007
0.006
0.005
A0.004
F -
0.003-
0.002 -
0.001
0.000
0.7
0.6
0.5
0.4
0.3=
0.2
0.1
0.0
Aug 2013
30 Fri 31 Sat 1 Sun 2 Mon 3 Tue
8/29/2013 12:00:00 AM - 9/5/2013 12:00:00 AM
4 Wed
5 Thu
Ave. Wet Flow Rate (0.195 mgd):0.14
white street next to fulton
August 31 2013 Storm
Ave. Dry Rate (0.173 mgd):0.13 Cumulative Rainfall (2.430 in):0.00
0.6
0.4
0.2—
$
0.0
0.3
0.2—
0.1
0.0
0.5
0.4
0.3
0.2
0.1
0.0
t\YoNo,
vi4
,0,0/6
1
ilk
30 Fri
31 Sat 1 Sun 2 Mon 3 Tue 4 Wed
Aug 2013 8/29/2013 12:00:00 AM - 9/5/2013 12:00:00 AM
5 Thu
0.0012
0.0010
0.0008
s 0.0006
0)
F 0.0004
0.0002
0.0000
- 0.0002
0.12
0.10
0.08
0.06
0.04
0.02
0.00
-0.02
2586 central
August 31 2013 Storm
Wet Total Flow (0.116 mgal):0.00
DWF Total (0.087 mgal):0.00
A 'JE. Wet Flow Rate (0.016 mgd):0.01 ADWF Rate (0.012 mgd):0.01
Aug 2013
30 Fri 31 Sat 1 Sun 2 Mon 3 Tue
8/29/2013 12:00:00 AM - 9/5/2013 12:00:00 AM
4 Wed
5 Thu
0)
E
Ave. Wet Flow Rate (0.016 mgd):0.01
2586 central
August 31 2013 Storm
Ave. Dry Rate (0.013 mgd):0.01 Cumulative Rainfall (2.430 in):0.00
0.10
0.05
0.00 -
0.06 —
E
0.02 -
�f�
0.5-
0.4-
0.3-
0.2-
0.1-
0.0
Aug 2013
30 Fri
31 Sat 1 Sun 2 Mon 3 Tue
8/29/2013 12:00:00 AM - 9/5/2013 12:00:00 AM
4 Wed 5 Thu
0.0030
0.0025
0.0020
To
0.0015
0.0010
46 Diagonal
August 31 2013 Storm
Wet Total Flow (0.352 mgal):0.00 DWF Total (0.283 mgal):0.00
Avc.Wet Flow Rate (0.050 mgd):0.04 ADWF Rate (0.040 mgd):0.04
tly
0.0000
0.35
0.30
0.25
,0.20
E
0.15
0.10
0.05
0.00
Aug 2013
30 Fri 31 Sat 1 Sun 2 Mon 3 Tue
8/29/2013 12:00:00 AM - 9/5/2013 12:00:00 AM
4 Wed
5 Thu
Ave. Wet Flow Rate (0.050 mgd):0.04
46 Diagonal
August 31 2013 Storm
Ave. Dry Rate (0.041 mgd):0.06
Cumulative Rainfall (2.430 in):0.00
0.3-
0.1 -
0.0
0.10 -
a)
0.05-
0.5-
0.4-
0.3-
0.2-
0.1-
0.0
Aug 2013
30 Fri 31 Sat 1 Sun 2 Mon 3 Tue 4 Wed
8/29/2013 12:00:00 AM - 9/5/2013 12:00:00 AM
5 Thu
APPENDIX B
SEWERSHED 7B FLOW MONITORING DATA
THE CITY OF
DUB
Masterpiece on the Mississippi
Sewershed 7B
Fail Locations
DAGIS
• p 44444 al
D.YOUI ARIA OlOGRAPNIC INFORMATION SYSTIM
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2247 Central
Sumppump to sanitary
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DISCLAIMER: This information was complied
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 of the authorized or unauthorized use of
this data or the Inability to use this data or out of any breach of
warranty whatsoever.
1 inch = 600 feet
200100 0 200 400 600 800 Feet
WE
Map Prepared by:
City of Dubuque
Engineering Division
50 West 13th Street
Dubuque, Iowa 52001
Phone: (563) 589-4270
Fax: (563) 589-4205
0.0025
0.0020
�a
0)
E 0.0015
0.0010
0.0005
0.30
0.25
-0 0.20
F
0.15
0.10
0.05
2404 White
August 22 2013 Storm
Wet Total Flow (0.750 mgal):0.00
Wet Flow Rate (0.107 mgd):0.09
DWF Total (0.667 mgal):0.00
ADWF Rate (0.095 mgd):0.06
21 Wed
Aug 2013
22 Thu 23 Fri 24 Sat 25 Sun
8/20/2013 12:00:00 AM - 8/27/2013 12:00:00 AM
26 Mon
27 Tue
Ave. Wet Flow Rate (0.107 mgd):0.09
2404 White
August 22 2013 Storm
Ave. Dry Rate (0.087 mgd):0.06 Cumulative Rainfall (0.990 in):0.00
0.30
0.25
-g0.20
E _
0.15 _
0.10
0.05
0.14
0.12
-,0.10
E
0.08—
0.06
0.04—
0.5
0.4
0.3
0.2
0.1
0.0
I
Aug 2013
21 Wed 22 Thu 23 Fri 24 Sat 25 Sun
8/20/2013 12:00:00 AM - 8/27/2013 12:00:00 AM
26 Mon 27 Tue
0.0016
0.0014
0.0012
0.0010
?0.0008
0.0006
0.0004
0.0002
0.16
0.14
0.12
110.10
0.08
0.06
0.04
0.02
400 Kaufmann Ave
August 22 2013 Storm
Wet Total Flow (0.384 mgal):0.00
AJe. Wet Flow Rate (0.055 mgd):0.04
DWF Total (0.380 mgal):0.00
ADWF Rate (0.054 mgd):0.03
21 Wed
Aug 2013
22 Thu 23 Fri 24 Sat 25 Sun
8/20/2013 12:00:00 AM - 8/27/2013 12:00:00 AM
26 Mon
27 Tue
0.15
X0.10
E
0.05
0.12
0.10
0.08
rn
E 0.06
0.04
0.02
C
0.5-
0.4-
0.3-
0.2-
0.1-
0.0
Ave. Wet Flow Rate (0.055 mgd):0.04
400 Kaufmann Ave
August 22 2013 Storm
Ave. Dry Rate (0.053 mgd):0.03 Cumulative Rainfall (0.990 in):0.00
21 Wed 22 Thu 23 Fri 24 Sat 25 Sun
Aug 2013 8/20/2013 12:00:00 AM - 8/27/2013 12:00:00 AM
26 Mon
27 Tue
0.00025 _
0.00020
0.00015
Ti) -_
0.00010
0.00005
524 Kaufmann Ave
August 22 2013 Storm
Wet Total Flow (0.129 mgal):
Wet Flow Rate (0.018 mgd):0.01
DWF Total (0.101 mgal):
ADWF Rate (0.016 mgd):
i‘
0.00000 '- 'W'
0.07
0.06
0.05
� 0.04
C)
E
0.03
0.02
0.01
0.00
Aug 2013
21 Wed 22 Thu 23 Fri 24 Sat 25 Sun
8/20/2013 12:00:00 AM - 8/27/2013 12:00:00 AM
26 Mon
27 Tue
0.06—
0.05—
0.04 —
g0.03—
0.02-
0.01 ti
0.00
0.06- 0.06-
)0.04 -
1
0.02-
0.00
0.5-
0.4-
0.3–
c
0.2-
0.1
0.0
Ave. Wet Flow Rate (0.018 mgd):0.01
524 Kaufmann Ave
August 22 2013 Storm
Ave. Dry Rate (0.016 mgd): Cumulative Rainfall (0.990 in):0.00
h4
M•
PL}
21 Wed
Aug 2013
22 Thu 23 Fri 24 Sat 25 Sun 26 Mon
8/20/2013 12:00:00 AM - 8/27/2013 12:00:00 AM
27 Tue
0.008
0.006
1:1)
0.004
0.002
0.000
1.4
1.2
1.0
C 0.8
0.6
0.4
0.2
0.0
Aug 2013
2404 White
August 31 2013 Storm
Wet Total Flow (0.540 mgal):0.00 DWF Total (0.667 mgal):0.00
kJ _Wet Flow Rate (0.083 mgd):0.10 ADWF Rate (0.095 mgd):0.06
30 Fri
31 Sat 1 Sun 2 Mon 3 Tue
8/29/2013 12:00:00 AM - 9/5/2013 12:00:00 AM
4 Wed
5 Thu
1.5
1.0
0)
0.5
0.0
0.14
0.12
x,0.10
2404 White
August 31 2013 Storm
Ave. Wet Flow Rate (0.083 mgd):0.10 Ave. Dry Rate (0.087 mgd):0.06
Cumulative Rainfall (2.430 in):0.00
0.08-
0.06
0.04
0.5
0.4
0.3
0.2
0.1
0.0
00"
M1v
ul
MI
)
Aug 2013
30 Fri 31 Sat 1 Sun 2 Mon 3 Tue 4 Wed
8/29/2013 12:00:00 AM - 9/5/2013 12:00:00 AM
5 Thu
400 Kaufmann Ave
August 31 2013 Storm
Wet Total Flow (0.436 mgal):0.00
AvaWet Flow Rate (0.062 mgd):0.05
DWF Total (0.380 mgal):0.00
ADWF Rate (0.054 mgd):0.03
0.0025
0.0020
A0.0015
E
0.0010—
Aug 2013
30 Fri 31 Sat 1 Sun 2 Mon 3 Tue
8/29/2013 12:00:00 AM - 9/5/2013 12:00:00 AM
4 Wed
5 Thu
E
0.3
0.2
0.1
Ave. Wet Flow Rate (0.062 mgd):0.05
400 Kaufmann Ave
August 31 2013 Storm
Ave. Dry Rate (0.053 mgd):0.03
Cumulative Rainfall (2.430 in):0.00
0.12
0.10
0.08-
rn -
E 0.06-
0.04
0.02
0.5
0.4
0.3
0.2
0.1
0.0
\koyNK
4ci
Aug 2013
30 Fri 31 Sat 1 Sun 2 Mon 3 Tue 4 Wed
8/29/2013 12:00:00 AM - 9/5/2013 12:00:00 AM
5 Thu
524 Kaufmann Ave
August 31 2013 Storm
Wet Total Flow (0.177 mgal):
Wet Flow Rate (0.025 mgd):0.02
DWF Total (0.101 mgal):
ADWF Rate (0.016 mgd):
0.00025
0.00020—
10.00015
-
F -
0.00010—
0.00005
0.00000
0.08-
0.07
0.06—
0.05
1
�0.04
0.03 -
0.02-
0.01
0.00
Aug 2013
30 Fri 31 Sat 1 Sun 2 Mon 3 Tue 4 Wed
8/29/2013 12:00:00 AM - 9/5/2013 12:00:00 AM
5 Thu
0.08
0.06
E 0.04
0.02
Ave. Wet Flow Rate (0.025 mgd):0.02
524 Kaufmann Ave
August 31 2013 Storm
Ave. Dry Rate (0.016 mgd): Cumulative Rainfall (2.430 in):0.00
0.00
0.06—
a,0.04—
E
0.02—
0.00 -
0.5-
0.4 -
0.3-
0.2-
0.1-
0.0
30 Fri
Aug 2013
31 Sat 1 Sun 2 Mon 3 Tue
8/29/2013 12:00:00 AM - 9/5/2013 12:00:00 AM
4 Wed 5 Thu