04/20/2020-CC-Agenda Packet-Work SessionAGENDA
CITY COUNCIL WORK SESSION
MONDAY, APRIL 20, 2020
6:00 PM
502 ELM STREET
SANGER, TEXAS
IMPORTANT NOTICE: MEETING HELD BY TELECONFERENCE
Meetings will temporarily be held via teleconference and will not be held at Sanger City
Hall. Effective March 16, 2020 Texas Governor Abbott suspended certain Open Meeting rules
to allow telephonic or videoconference meetings of government bodies that are accessible to the
public to decrease large groups of people from assembling in order to advance the public health
goal of limiting facetoface meetings to slow the spread of the Coronavirus (COVID19). The
suspension temporarily removes the requirement that government officials and members of the
public be physically present at a meeting location. A recording of the telephone conference will
be made available to the public in accordance with the Open Meetings Act, upon written request
for up to 90 days after the official minutes of the meeting are approved.
This meeting is a Work Session there is typically no public input allowed during a Work Session.
There is no action taken on items summarized or discussed during a Work Session.
The public may dial one of the the following numbers and enter the Meeting ID and Password to
join the meeting. A tollfree number is available and noted on the list below:
Meeting ID: 985 5578 7117
Password: 404334
Dial by your location
+1 346 248 7799 US (Houston)
+1 669 900 9128 US (San Jose)
+1 646 558 8656 US (New York)
+1 253 215 8782 US
+1 301 715 8592 US
+1 312 626 6799 US (Chicago)
888 475 4499 US Tollfree
877 853 5257 US Tollfree
Meeting ID: 985 5578 7117
Password: 404334
1.Call Meeting to Order, Roll Call to Establish a Quorum.
2.Overview of Items on the Regular Agenda
a.Update on Ground Storage Tank Repairs
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AGENDACITY COUNCIL WORK SESSIONMONDAY, APRIL 20, 20206:00 PM502 ELM STREETSANGER, TEXASIMPORTANT NOTICE: MEETING HELD BY TELECONFERENCEMeetings will temporarily be held via teleconference and will not be held at Sanger CityHall. Effective March 16, 2020 Texas Governor Abbott suspended certain Open Meeting rulesto allow telephonic or videoconference meetings of government bodies that are accessible to thepublic to decrease large groups of people from assembling in order to advance the public healthgoal of limiting facetoface meetings to slow the spread of the Coronavirus (COVID19). Thesuspension temporarily removes the requirement that government officials and members of thepublic be physically present at a meeting location. A recording of the telephone conference willbe made available to the public in accordance with the Open Meetings Act, upon written requestfor up to 90 days after the official minutes of the meeting are approved. This meeting is a Work Session there is typically no public input allowed during a Work Session. There is no action taken on items summarized or discussed during a Work Session.The public may dial one of the the following numbers and enter the Meeting ID and Password tojoin the meeting. A tollfree number is available and noted on the list below:Meeting ID: 985 5578 7117Password: 404334Dial by your location+1 346 248 7799 US (Houston)+1 669 900 9128 US (San Jose)+1 646 558 8656 US (New York)+1 253 215 8782 US+1 301 715 8592 US+1 312 626 6799 US (Chicago)888 475 4499 US Tollfree877 853 5257 US TollfreeMeeting ID: 985 5578 7117Password: 4043341.Call Meeting to Order, Roll Call to Establish a Quorum.2.Overview of Items on the Regular Agenda
a.Update on Ground Storage Tank Repairs
3.Adjourn
I, the undersigned authority, do hereby certify that this Notice of Meeting was posted on the
City Website, and on the bulletin board, at the City Hall of the City of Sanger, Texas, a place
convenient and readily accessible to the general public at all times. Said notice was posted on the
following date and time, and remained posted continuously for at least 72 hours prior to the
scheduled time of said meeting and shall remain posted until meeting is adjourned.
Cheryl Price City Secretary
City of Sanger, Texas
Date/Time Posted
This facility is wheelchair accessible and accessible parking spaces are available. Requests for additional
accommodations or interpretive services must be made 48 hours prior to this meeting. Please contact the City
Secretary's office at (940) 4587930 for further information.
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CITY COUNCIL AGENDA MEMO
AGENDA ITEM NO. 2.a.
AGENDA MEETING DATE: April 20, 2020
TO: Alina Ciocan, City Manager
FROM: James Berman, Public Works Director
ITEM/CAPTION:
Update on Ground Storage Tank Repairs
Discussion on Changer Orders for Repairs to Acker St & Cowling Rd Ground Storage Tanks
AGENDA TYPE: Work Session
ACTION REQUESTED: Presentation
BACKGROUND:
On February 3, 2020 Maguire Iron, Inc. was selected to provide for professional full service water storage facilities
maintenance for the City of Sanger. During the process of renovating the Acker St Tank, we found that all of the interior
beams were severely corroded at the point where they rest on the inner support plat, as well as where the beams are
connected at the tank sidewall. During the process of renovating Cowling Rd Tank much of the same conditions were
found.
LEGAL/BOARD COMMISSION RECOMMENDATIONS/CITIZEN NOTICE FEEDBACK:
FINANCIAL SUMMARY FUNDING/FISCAL IMPACT:
FUNDS:
STAFF RECOMMENDATION/ACTION DESIRED:
Staff recommends following through with repairs to the ground storage tanks.
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CITY COUNCIL AGENDA MEMOAGENDA ITEM NO. 2.a.AGENDA MEETING DATE: April 20, 2020TO: Alina Ciocan, City ManagerFROM: James Berman, Public Works DirectorITEM/CAPTION:Update on Ground Storage Tank RepairsDiscussion on Changer Orders for Repairs to Acker St & Cowling Rd Ground Storage TanksAGENDA TYPE: Work SessionACTION REQUESTED: Presentation BACKGROUND:On February 3, 2020 Maguire Iron, Inc. was selected to provide for professional full service water storage facilitiesmaintenance for the City of Sanger. During the process of renovating the Acker St Tank, we found that all of the interiorbeams were severely corroded at the point where they rest on the inner support plat, as well as where the beams areconnected at the tank sidewall. During the process of renovating Cowling Rd Tank much of the same conditions werefound.LEGAL/BOARD COMMISSION RECOMMENDATIONS/CITIZEN NOTICE FEEDBACK:FINANCIAL SUMMARY FUNDING/FISCAL IMPACT:FUNDS:STAFF RECOMMENDATION/ACTION DESIRED:
Staff recommends following through with repairs to the ground storage tanks.
ATTACHMENTS:
Description Upload Date Type
Recommended Change Orders 4/14/2020 Exhibit
Page 4
March 20, 2020
City of Sanger, Texas
c/o James Berman
502 Elm Street
Sanger, TX 76266
Mr. Berman:
Per your request I have created a report outlining the current condition of the Acker St. 300,000 gallon, the Cowling Rd.
500,000 gallon, and the Well #6 200,000 water storage tanks. I have also included an explanation about exposing latent
defects in the structure of a tank during the renovation process (see page 2).
Prior to submitting the response to the City’s RFQ, I indicated that we may find structural problems with the beams and
roof plates on the Acker St. and Cowling Rd. tanks. During the process of renovating the Acker St. tank, we found that all
of the interior beams were severely corroded at the point where they rest on the inner support plate, as well as where
the beams are connected at the tank sidewall. The level of corrosion on the tank made it unsafe for rigging. We re-
inspected the Cowling Rd. Tank to assess the condition of the interior roof structure, as well as the Well #6 tank to
provide a comprehensive list of any potential change order items.
Enclosed are the findings from the inspections, as well as recommendations and pricing for fixing the structural
problems. All of the pricing is turnkey, and includes all soft-costs such and engineering, permitting, etc. If you have any
questions, please do not hesitate to contact me. Again, we appreciate this opportunity and look forward to maintaining
the City’s tanks for many years to come.
Best regards,
Jack Powell
Sales Manager – South
Texas, Louisiana, Mississippi, Arkansas, Oklahoma, and E. Missouri-Illinois
powellj@maguireiron.com
337-936-6012
Page 5
Visual Inspections, Latent Defects, and Change Orders
Visual water tank inspections are completed when the tank in online and still providing water service to the city. This is
a common type of inspection because it is the least invasive and least stressful, and it can be completed at no cost to the
city. The inspector is able to assess the coatings, condition of the appurtenances, and most of the structural
components of the tank. That information is used to create the initial scope of work for the required repairs and
coatings for each tank, which Jeff Leubner provided in his reports and proposal for the city.
When we use a visual inspection to create pricing and a Maintenance Plan with upfront renovations and repairs, we
always include language in the contract regarding “latent defects.” These are deficiencies in the tank which could not
readily be seen through the visual inspection. Many times, these defects are only discovered after the abrasive blast is
completed. We have seen many situations where past structural damage is painted over and only visible after the
coating is removed. It is possible to discover some of these deficiencies through more thorough inspections, but they
are extremely costly and require the tank to be rigged/scaffolded and removed from service for multiple days.
Inspections like these can cost over $25,000. In the end, the city spends a significant amount of money to only discover
the problem, without doing anything to solve it.
As we have shown you through pictures, we discovered issues with the Acker St. 300,000 gallon tank after removing the
vent structure and completing the abrasive blast adjacent to the vent, inner support post, and post support plate. We
discovered that the beams and support plate were completely deteriorated and would require replacement. The only
way to uncover this issue was to complete significant work to the tank, such as the above mentioned. We discovered a
much smaller problem on the Well #6 tower when we abrasive blasted an area near an expansion joint on the tank’s fill
pipe. Again, the only way to discover the issue was through aggressive measures.
As you can see, there are challenges when creating the initial specification for renovating tanks. When we run into a
situation such as Sanger, we have two options: first, specify repairs that might need to made, which significantly drives
up the cost and may not be required; or second, address the repairs that we can see, and address additional problems as
they arise. The second option allows us to provide the most cost-effective solution, as we are not inflating our costs for
unnecessary repairs.
Per your request we are currently working on potential solutions for roof issues if they arise on the 500,000 gallon
Cowling Rd. Tank, as they did with the Acker St. Tank, so that the council can have the information beforehand. I will
provide costs for both roof repair and complete replacement.
I understand that change orders for construction projects are challenging for cities. We try to avoid them, or at least
make the customer aware that there may be potential change orders, as I did before submitting the response to the
RFQ. We appreciate you working with us to provide the best solutions for the city. We can also look forward to
thoroughly maintaining the tanks in the future on the Maintenance Plan, so that the city will not be facing the same
challenges that we are dealing with now.
Page 6
300,000 Gallon Acker St. Tank Pictures
exterior roof vent throat pipe looking into tank interior
close up from above, interior beams and plate – complete delamination of the steel
Page 7
Interior Plate from above after rust removed
interior ladder and beam at sidewall – beam delaminated at sidewall
Page 8
interior beams and inner plate (hole circled) view from inside
interior beams – example of beam starting to twist and fall due to corrosion
Page 9
Acker St. Tank Inspection Notes, Recommendations, and Cost of Repair
Notes:
1. The roof beams exhibit aggressive corrosion and delamination of the steel throughout the length of the
beams; the beam ends (at the sidewall and at the center plate/post) are severely corroded and lack
structural integrity. Some beams have started to twist and droop.
2. The center plate (upon which the beams rest) at the top of the center post is severely corroded and
has deep pitting, as well as holes in the plate steel.
3. The roof plates exhibit corrosion in the lapped seams, or where plates overlap each other.
Recommendations:
Roof Beam Replacement
• Remove and replace all of the roof beams (24) with new, 6” C-channel beams of similar
construction of the original beams. Replacing only sections of the beams would be as costly as full
replacement.
• Remove and replace the center plate with a similar size ring of rolled 6” C-channel. Install
additional bracing from the rolled channel ring to the existing center post (similar to Cowling Rd.
design).
• Keep the current roof plates and abrasive blast per the original scope of work. Any holes caused by
the SSPC-SP#10 blast would be plated over with full seam welds.
Cost to complete the above work: $75,000.00
Page 10
500,000 Gallon Cowling Rd. Tank Pictures
exterior roof vent throat pipe looking into tank interior
interior view from above, interior beams and plate – aggressive corrosion of the steel
Page 11
Interior beams and roof plates
additional picture of beams and roof plates
Page 12
interior beams at tank sidewall
interior beams, roof plates, center post, center rolled channel support ring with bracing
Page 13
Cowling Rd. Tank Inspection Notes, Recommendations, and Cost of Repair
Notes:
1. The roof beams exhibit aggressive corrosion and delamination of the steel throughout the length of the
beams; the beam ends (at the sidewall) are severely corroded .
2. The center ring (upon which the beams rest) at the top of the center post is severely corroded and has
deep pitting, but should clean-up after the abrasive blast.
3. The roof plates exhibit aggressive corrosion and delamination in the lapped seams, or where plates
overlap each other; lapped steel is peeling away from the lapped plate. The plates exhibit aggressive
corrosion over a majority of the plate surface.
Recommendations (3 options):
1. Proceed as planned with renovation; assess structure post-abrasive blast. Provide minor steel repair
and/or replacement as needed.
Cost to complete the above work: $575/hour + materials
2. Remove and replace all of the roof beams (30) with new, 6” C-channel beams of similar construction of
the original beams. Replacing only sections of the beams would be as costly as full replacement.
o Keep the current roof plates and abrasive blast per the original scope of work. Any holes
caused by the SSPC-SP#10 blast would be plated over with full seam welds.
Cost to complete the above work: $125,000.00
3. Remove and replace the entire roof structure and plates if current steel condition is beyond repair.
o The city has two installation options:
▪ Install a roof of similar construction to the current design.
▪ Install a self-supporting dome roof.
• Roof would require no beams, posts, or additional bracing on the tank
interior or exterior, leaving a smooth surface on the tank interior. This
would increase the life of the tank roof over the interior beam option.
Cost to complete the above work: $235,000.00 for either option
Page 14
200,000 Gallon Well #6 Tank Pictures
pipe and baffle-expansion joint
pipe and corrosion
Page 15
Well #6 Pedisphere Tank Inspection Notes, Recommendations, and Cost of Repair
Notes:
1. The inlet and outlet pipes exhibit areas of localized corrosion. Corrosion may be coming from the
inside to outside of pipe. It appears that the expansion joint does not require replacement.
Recommendations:
• Pipe does require welding repair; expansion joint will be further assessed at time of repair
(approximately 4-20-2020).
Cost to complete the above work: No additional cost unless expansion joint requires replacement
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