6.2 Award Manhole & Wastewater Pump RehabCITY OF SALINA
REQUEST FOR CITY COMMISSION ACTION DATE TIME
07/22/2013 4:00 P.M.
AGENDA SECTION ORIGINATING DEPARTMENT: FISCAL APP OVAL:
NO: 6 _
BY:
UTILITIES DEPARTMENT
ITEM FINAL APPROVAL:
NO: 2 j
Page 1 BY: Martha Tasker M4T BY:
ITEM: '
Award of contract for the Manhole and Wastewater Pump Station Rehabilitation, Project No. 13 -2965.
BACKGROUND:
Salina's wastewater collection system consists of 228 miles of sanitary sewer system, 4,736 manholes
and 60 wastewater pump stations. The relatively flat terrain of Salina, results in a greater number of
wastewater pump stations than would normally be found in a community our size. The Kansas
Department of Health and Environment Minimum Design Standards define minimum slopes or vertical
gradient for the gravity sanitary sewers. At some point, the gravity sanitary sewer reaches a depth
that is unsafe /costly to construct. When this occurs, a wastewater pump station is installed to lift the
wastewater to near the ground surface to allow the continuation of gravity flow. Wastewater collection
systems in warm climates with flat grades and multiple wastewater pump stations, promote septic
(anaerobic) conditions. Hydrogen sulfide (H2S) gas typically is formed in wastewater collection
systems that are conducive to creating septic conditions. Hydrogen sulfide gases are generated
within the anaerobic slime layer formed on the submerged pipe or manhole walls. Hydrogen sulfide
gases released from the slime layer rise into the airway portion of the pipe or manhole and react with
the bacteria and moisture on the pipe or manhole walls to form sulfuric acid. The sulfuric acid
corrodes the ferrous metal or concrete. The City's current design standards for new construction
require the use of corrosion resistant materials, such as HDPE, PVC or clay pipe materials and
manholes with PVC liners.
The interior of precast manholes and wastewater pump station wetwells deteriorate due to the levels
of hydrogen sulfide in the raw wastewater. Acid resistant calcium aluminate cementitious liner is
utilized in residential areas with low H2S levels and a polyurethane flexible protective coating is utilized
in wetwells and interceptor sewers where H2S levels are higher. Refer to the attached location map
for the specific location of the work to be completed. The project includes the following:
Wastewater Pump Station No. 19 was installed in 1997. The pump station has been in service over
15 years and requires rehabilitation as follows:
• Remove and replace pump discharge piping
• Repair failing T -Lock liner with polyurethane flexible protective coating
• Remove existing sluice gate and frame
Wastewater Pump Station No. 46 was installed in 2000. The pump station has been in service 13
years and requires rehabilitation as follows:
• Remove and replace pump discharge piping
Manhole rehabilitation with acid resistant calcium aluminate cementitious liner.
• Manholes (35 total)
AGENDA SECTION
NO:
CITY OF SALINA
REQUEST FOR CITY COMMISSION ACTION DATE TIME
07/22/2013 4:00 P.M.
ORIGINATING DEPARTMENT:
UTILITIES DEPARTMENT
ITEM
NO:
Page 2 BY: Martha Tasker
Manhole rehabilitation with polyurethane flexible protective coating.
Manholes (8 total)
Pump Station Nos. 29, 5 and 6 wetwells
Bids were received on July 16, 2013 as follows:
Bidder Bid Amount
Mayer Specialty Services, LLC
831 Industrial Rd /P.O. Box 469 $196,091
Goddard, KS 67052
Engineer's Estimate $218,897
FISCAL APPROVAL:
BY:
FINAL APPROVAL:
BY:
Mayer Specialty Services, LLC of Goddard, Kansas submitted a proposal that fully complies with the
project specifications. Mayer Specialty Services, LLC has performed this type of work for the City and
the quality of their workmanship is excellent. The cost for the polyurethane flexible protective coating
was $29 to $30 per square foot in 2009 and 2010, and the unit price for this project is $29. The unit
costs for this project are comparable to previous projects.
The work shall commence on or before August 1, 2013 and be complete by December 31, 2013.
FISCAL NOTE:
Budget allocations are included in the 2013 Capital Improvement Program under the category of
System Enhancements as follows:
Rehabilitate Manholes and Wastewater Pump Station Nos. 5, 6 and 29 $130,000
Replace piping at Wastewater Pump Station Nos. 19 and 46 95,000,
Total: $225,000
Staff is proposing the addition of a 5% construction contingency to the approved costs to cover
construction change orders, which is allowed by Salina Code, Section 2 -237 and is common in capital
improvement projects. This contingency will allow staff to accommodate minor change orders with a
quick turnaround so as not to delay the construction progress. Change orders within the 5%
contingency will be approved by the Director of Utilities and the City Manager, with records to be
maintained and provided as necessary to the City Commission. Change orders beyond the 5%
contingency, or that increase the scope of the project, will be brought to the City Commission for
approval. The addition of the 5% contingency will increase the authorized amount to $205,896.
Funds ($218,897) are available for these capital maintenance improvements.
AGENDA SECTION
NO:
CITY OF SALINA
REQUEST FOR CITY COMMISSION ACTION DATE TIME
07/22/2013 4:00 P.M.
ORIGINATING DEPARTMENT: I FISCAL APPROVAL:
BY:
UTILITIES DEPARTMENT FINAL APPROVAL:
ITEM
NO:
Page 3 BY: Martha Tasker BY:
CONFORMANCE WITH STRATEGIC PLAN:
Related Strategic Plan goals may include:
GOAL #3: The City will provide the highest quality of services, consistent with governing body
direction, available resources and staff commitment to quality.
Action Item: The City Commission will maintain its commitment to the municipal organization by
providing direction and resources that will allow them to meet established expectations.
COMMISSION ACTION OR RECOMMENDED ACTION:
It is recommended that the City Commission award the contract for the Manhole and Wastewater
Pump Station Rehabilitation, Project No. 13 -2965 to Mayer Specialty Services, LLC, Goddard,
Kansas, in the amount of $196,091 (Authorized amount with 5% construction contingency $205,896).
WW Manhole & Pump Station Rehab
Project No. 13-2965
Location Map
Wet Well Rehabiliatation
x°' -..
I Wet Well on Ninth St.
Manhole Rehabiliatation
1 Manhole on North St
Nit
Manhole Rehabiliatation
74 a--rA Blv6w-
'OE
Cr rd-3
'Wet Well Rehabiliatation
I Wet Well on Fourth St.
low
U
Manhole Rehabiliatation A
8
1 Manhole on Talley Dr. 4#
Pump Station: 46
Rehabilitation fJ
1300 W. Schilling Rd
-W
W min ft P
Manhole Rehabiliatation
5 Manholes on Iron St.
1 Manhole at Bicentennial Center.
IMF - x
Manhole Rehabiliatation
2 Manholes on Marymount Rd.
T,
Pump Station: 19
Rehabilitation
1410 E. Crawford St.
Manhole Rehabiliatation
22 Manholes on Ohio St.
5 5 Manholes on Cloud St. East of Ohio St.
Manholes
It
Manhole & Wet Well Rehabiliatation
I Manhole on Cloud St.
1 Wet Well on Norton St.
Manhole Rehabiliatation
Manholes on Centennial Rd.
[I