HomeMy WebLinkAboutContract 49049-A3 CSC No. 49049-A3
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Clly, AMENDMENT No.03
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TO CITY SECRETARY CONTRACT No. 49049
WHEREAS, the City of Fort Worth (CITY) and CDM Smith, Inc,
(ENGINEER) made and entered into City Secretary Contract No. 49049, (the
CONTRACT) which was authorized by M&C C- 28213 on the 2nd day of May, 2017
in the amount of $ 1,570, 965.00; and
WHEREAS, the CONTRACT involves engineering services for the follow-
ing project:
VILLAGE CREEK WATER RECLAMATION FACILITY GRIT REMOVAVL PROCESS; and
WHEREAS, the CONTRACT was subsequently revised by Amendment 01 in
the amount of $885, 755 which was authorized by M&C C-28857 on September
18, 2018; and
WHEREAS, the CONTRACT was subsequently revised by Amendment 02 in
the amount of $71,993 which was authorized on February 7, 2019; and
WHEREAS, it has become necessary to execute Amendment No. 03 to the
CONTRACT to include an increased scope of work and revised fee.
NOW THEREFORE, CITY and ENGINEER, acting herein by and through their
duly authorized representatives, enter into the following agreement,
which amends the CONTRACT:
1.
Article I of the CONTRACT is amended to include the additional
engineering services specified in a proposal dated December 18, 2019, a
copy of which is attached hereto and incorporated herein. The cost to
City for the additional design services to be performed by Engineer
totals $114,939. (See Attached Scope of 5ervirces, Fee Table and related
Exhibits)
2.
Article II of the CONTRACT is amended to provide for an increase in
the fee to be paid to Engineer for all work and services performed under
the Contract, as amended, so that the total fee paid by the City for all
work and services shall be an amount of $2, 643,652.
3.
All other provisions of the Contract, which are not expressly
amended herein, shall remain in full force and effect.
EXECUTED and EFFECTIVE as of the date last written by a signatory, below.
City of Fort Worth,Professional Services Agreement Amendment
CFW Official Release 9/19/2017;Adapted February 2019 OFFICIAb RECORD
CITY SECRETARY
FT. WORTH, TX
APPROVED:
City of Fort Worth ENGINEER
CDM Smith Inc.
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Dana SurphdoR 21,2020
Dana Burghdoff Adam Evans, PE
Assistant City Manager Associate
DATE:Apr21,2020 DATE: 3/30/2020
APPROVAL RECOMMENDED:
aY/,f*L M&A`6l-
Chfistopher Hkdef(AX 9,2020)
Christopher P. Harder, PE M&C: 40-O►Sq
Director, Water Department Date: o4/01/2,
11g5tL:2a2o—513263
APPROVED AS TO FORM AND LEGALITY:
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LI if I.
Biack N.afaa
D (Apr 20,2020)
Douglas W. Black
Assistant City Attorney
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ATTEST:
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Mary J. Kayser .,
City Secretary �.I
Contract Compliance Manager:
By signing, I acknowledge that I am the person responsible for the monitoring
and administration of this contract, including ensuring all performance and
reporting .requirements.
r�-•• 4/l/2020
Far da Go erya, PE
Senior Project Manager
City of Fort Worth,Professional Services Agreement Amendment
CFW Official Release 9/19/2017,Adapted April 2020 OFFICIAL RECORD
CITY SECRETARY
FT. WORTH,TX
CDmM.
sith
801 Cherry Street,Unit 33,Suite 1820
Fort Worth,Texas 76102
tel:817 332-8727
December 31,2019
Farida Goderya,PE,PhD
Fort Worth Water Department
200 Texas Street
Fort Worth,Texas 76102
Subject: Village Creels Water Reclamation Facility Grit Removal Process
City Project No.100075; CSC#49049
Propose Amendment No.3
Dear Farida:
Enclosed is CDM Smith's proposal for Amendment No.3 including the following additional scope of
work items.
■ Physical modeling for the South Flow Pump Station $82,294
■ Additional odor control design $14,351 h
■ Grit Influent Splitter Box water jet system modifications $18,294
Total $114,939
Physical Modeling for South Flow Pump Station
In accordance with American National Standard Institute(ANSI)/Hydraulic Institute(HI)9.8-2018
guidance,a physical model study is required for pump intakes that meet one or more of several
features.Two of the features listed in HI standard are as follows:
■ Trench-type wet well pumps with flows greater than 20,000 gpm(28 mgd)per pump or a
total station flow greater than 50,000 gpm (72 mgd).
■ Individual pump flows greater than 40,000 gpm (57.6 mgd) or a total station flow greater
than 100,000 gpm (144 mgd).
The Village Creek South Flow Pump Station is designed for a 150 mgd firm capacity.Therefore,a
physical model study is required by HI 9.8.Physical model results will be used to optimize wet well
layout and confirm hydraulic conditions.Pump tests are conducted by the pump manufacturer at
the manufacturing facility in a controlled environment with a uniform approach flow to the pumps.
These pump tests are used to develop the pump curves.Failure to provide uniform approach flow
hydraulics can result in pump performance that differs significantly from that predicted from
performance curves.Following HI standards helps mitigate adverse approach flow conditions
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WATER+ENVIRONMENT+TRANSPORTATION+ENERGY+FACILITIES
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CDM
Smith
Farida Goderya,PE,PhD
December 31,2019
Page 2
within the pump sump.However,these standards were developed for maximum pump capacities of
20,000 gpm each.For systems exceeding this capacity,as is the case with the Village Creek South
Flow Pump Station,it is necessary to use physical modeling techniques to evaluate the hydraulic
conditions within the intake.
A physical hydraulic model study of the proposed pump station should be conducted during the
next phase of design and include both the pump station wet well and screen structure.The physical
model study is a means to perform the following:
■ Evaluate the hydraulic conditions of the intake
■ Determine potential adverse hydraulic phenomena that may exist within the intake
■ Develop recommended modifications to remediate any adverse hydraulic phenomena that
could impact pump performance
The test plan would include the following:
■ Baseline Testing:Tests are conducted at several possible operating conditions with the intake
structure as designed.
■ Modification Testing:Test are conducted to develop modifications to alleviate or improve the
approach flow conditions within the Pump intake or screen structure.Changes may include
non-structural modifications only with the overall intake and size unchanged.
■ Witness Testing:Testing will be held at Clemson Engineering Hydraulics Facility to
demonstrate model results with and without proposed modifications.
■ Documentation Testing:A set of final tests are conducted to verify that the recommended
modifications are effective for a range of expected operating conditions.
Attached is an estimate of activities that will occur during this physical modeling effort as well as
Clemson Engineering Hydraulics (CEH)proposal to construct and test the Pump station
configuration.The total cost for this physical modeling effort is$83,237.This included travel time
to CEH warehouse for witness testing.
It is anticipated that the physical modeling efforts will take approximately 8 to 12 weeks after
notice to proceed.Final design is dependent on the completion of physical modeling and is
therefore the critical path for final design.Please see attached updated schedule including the
physical modeling efforts.Please contact me with any questions.
Additional Odor Control Design
As part of the VCWRF Grit Removal Process Project Preliminary Design Report,CDM Smith
evaluated multiple odor control alternatives for the new grit removal facility.The selected design
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Amendment No.3 Ptoposal_Rev112312019.dou
CDM
Smith
Farida Goderya,PE,PhD j
December 31,2019
Page 3
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was to modify the existing Headwork Biofilter System to accommodate the additional air flow
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from the grit removal facility.During the scoping phase of this project CDM Smith based our level of
effort for odor control design on a stand-alone packaged odor control system which required
minimal effort for our HVAC design engineers which included air flow calculations and preliminary
duct layout.Additional HVAC design effort is required for modifying the existing Headworks
Biofilter system and includes longer ductwork and supports,new fan selection and design,and
evaluating existing biofilter system to identify modifications to each component(fans,
humidification system,irrigation system,etc.)in order to add the additional air flow to the
biofilters.The additional effort to complete the odor control design is$15,193.
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CDM Smith's original level of effort budget included 352 total hours for HVAC/plumbing design and
268 total hours for odor control design.
HVAC design included the following:
■ Air flow calcs for grit facility
■ Preliminary duct layout for grit facility
■ Site survey of grit facility
■ Preliminary HVAC equipment selection
■ PDR Section
■ Plans&Specs
Odor Control design included the following:
■ Alternatives evaluation for grit facility odor control technology
■ PDR Section
■ Plans&Specs for packaged pre-engineered odor control system.Perform initial sizing
calculations,siting,service water and drain connections for packaged odor control system.
The selected odor control alternative requires our HVAC engineer to perform the additional
services below.
■ Longer ductwork layout and more design calcs and duct support design
■ Evaluate existing biofilter system fan performance from added pressure drop due to
inorganic media replacement
■ Evaluate existing biofilter system humidification system due to additional air flow into air
plenum
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Amendment No.3 Proposal_Rev112312o19.docx
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CDM
Smith
Farida Goderya,PE,PhD
December 31,2019
Page 4
■ Evaluate existing biofilter system irrigation system performance for inorganic media
■ New fan design calculations and fan selection.Normally with a packaged pre-engineered odor
control system the HVAC engineer with provide fan pressure and the odor control
manufacturer will do the fan selection and design
Grit Influent Splitter Box Water Jet System Modifications
As part of the grit facility physical modeling effort,it was recommended that the grit influent
splitter box be channelized,and water jets be added to facilitate grit movement up to the Headcell
influent channels at lower flow rates.The physical modeling testing showed that at higher flows,
the grit moved efficiently up the ramp.The design of these improvements was not a part of the
physical modeling amendment and are addressed separately herein.
The modifications to channelize the splitter box and the water jet system configuration is depicted
in the attached drawing.The water jet system includes four 250 gpm water jets staggered up the
slope of each grit influent channel angled towards the center of the channel.Water supply for these
jets will be from the main service water line that feeds the grit facility.The water jets will sequence j
on/off at a set timer starting at the bottom jet then sequencing up the slope.One channel will
operate at one time.This sequencing helps scour each channel while minimizing service water
demand.
Enclosed is our estimate on the additional design effort to incorporate the jet system into 90%
design and includes process-mechanical piping and motorized valves,electrical and controls to
sequence the valves.
CDM Smith would appreciate if the City considered compensating us for this additional design
effort.If you have any questions,please do not hesitate to contact me.
Sincerely,
Amy Robinson,PE
CDM Smith Inc.
c
cc: Stacy Barna,CDM Smith
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Amendment No.3 Proposal_Revl 12312019.doo( -
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City of Fort Worth,Texas
Mayor and Council Communication
DATE: 04/07/20 M&C FILE NUMBER: M&C 20-0159
LOG NAME: 60VCWRF GRIT REMOVAL—AMEND 3
SUBJECT
Authorize Execution of Amendment No.3 in the Amount of$114,939.00 to an Engineering Agreement with CDM Smith, Inc.,for the Process
Evaluation and Engineering Design of the Village Creek Water Reclamation Facility Grit Facility&South Influent Pump Station project, Adopt
Resolution Expressing Official Intent to Reimburse Expenditures with Proceeds of Future Debt and Adopt Appropriation Ordinance(COUNCIL
DISTRICT 5)
RECOMMENDATION:
It is recommended that the City Council:
1. Authorize the execution of Amendment No.3 to City Secretary Contract No.49049 with CDM Smith, Inc.,in the amount of$114,939.00 for
process evaluation and engineering design of the Village Creek Water Reclamation Facility Grit Facility&South Influent Pump
Station project for a revised contract amount of$2,643,652.00(City Project No. 100075);
2. Adopt the attached Appropriation Ordinance increasing estimated receipts and appropriations in the Water and Sewer Commercial Paper
Fund in the amount of$130,000.00 for the Village Creek Water Reclamation Facility Grit Facility&South Influent Pump Station;and
3. Adopt the attached Resolution Expressing Official Intent to Reimburse Expenditures with Proceeds of Future Debt for the Village Creek
Water Reclamation Facility Grit Facility&South Influent Pump Station.
DISCUSSION:
On May 2,2017(M&C C-28213),the City Council authorized an engineering agreement with CDM Smith,Inc.,(CSC No.49049)in the amount of
$1,570,965.00 to evaluate and design the Grit Removal Process at the Village Creek Water Reclamation Facility(CPN 10D075).On September
8,2018(M&C C-28857),Amendment No. 1 (CSC No.49049-A1)was executed in the amount of$885,755.00 for the design of the South Influent
Pump Station(PS).On February 7,2019,Amendment No.2 (CSC No.49049-A2)was executed administratively,in the amount of$71,993.00.
This Amendment No.3 includes the additional scope and fee to complete the detailed design,including plans and specifications,for the
proposed/new Grit Facility and South Influent Pump Station and associated force main.Specifically,this Amendment will include the additional
work to hydraulically model the proposed South Influent Pump Station,to evaluate and design additional odor control measures at the existing
biofilters,and to design a water jet system to improve the proposed grit facility performance and decrease future maintenance.
CDM Smith,Inc.,is proposing to perform the necessary design engineering work for a fee not to exceed$114,939.00. In addition to the contract
amount,$15,061.00 is required for project contingency,management and associated Water Department staff time.
Funding for the Village Creek Water Reclamation Facility Grit Facility&South Influent PS Project is depicted below:
Fund Existing Additional FPro�ecttT�otar
Appropriations Appropriations
Water&Sewer Bond 1$1,870,965.00 $0.00$1,870,965.00
2017A Fund 56011
W&S Commercial $1,035,755.00 $0.00$1,035,755.00
Paper Fund 56016
W&S Commercial $0.00 $130,000.00 $130,000.00�
Paper Fund 56017
Project Total $2,906,720.00 77$130,000.00$3,036,720.00
*Numbers rounded for presentation.
This project will have no impact on the Water Department's annual operating budget when completed.
This project is anticipated to be included in a future revenue bond issue for the Water and Sewer Fund.Available cash within the Water and Sewer
portfolio and the City's portfolio along with the appropriation authority authorized under the Callable Commercial Paper Program(CP)will be used
to provide interim financing for this project until the debt is issued.To the extent resources other than the Water and Sewer portfolio are used to
provide interim financing,the Water and Sewer Fund will be charged interest that is equivalent to the overall rate of return being earned by the City
portfolio(currently approximately one-percent annually).Should the City's portfolio not support the liquidity needed to provide an interim short-term
financing source,another funding source will be required,which could mean issuance of securities under the CP Program or earlier issuance of
Water and Sewer revenue bonds than is currently planned.Once debt associated with this project is sold,bond proceeds will be used to reimburse
the Water and Sewer portfolio and the City's portfolio in accordance with the attached Reimbursement Resolution.
The City Council adopted the Water Department's Fiscal Year 2020-2024 Five-Year Capital Improvement Plan on September 17,2019.This City
Council adopted plan includes this specific project,with funding identified through the CP program to be reimbursed with future revenue bonds. In
accordance with the provisions of the Financial Management Policy Statements,Staff anticipates presenting revenue-supported debt issuances to
the City Council for consideration within the next three years.This debt must be issued within approximately three years to provide reimbursement
for these expenses.If that does not occur,the costs will no longer be reimbursable by issuing tax-exempt debt and the funding source will have to
be made whole through other budgetary methods.Adoption of this resolution does not obligate the City to sell bonds but preserves the ability to
reimburse the City from tax-exempt bond proceeds.
MWWBE OFFICE:A waiver of the goal for MBE/SBE subcontracting requirements was requested by the Department and approved by the MWBE
Office,in accordance with the BDE Ordinance, because the purchase of goods or services is from sources where subcontracting or supplier
opportunities are negligible.
This project serves the entire City and is located in COUNCIL DISTRICT 5,Mapsco 90J,90Q and 9DS.
FISCAL INFORMATION/CERTIFICATION:
The Director of Finance certifies that upon approval of the above recommendations and adoption of the attached appropriation ordinance,funds
will be available in the Water&Sewer Commercial Paper Fund for the Process Evaluation and Engineering Design for the future growth of
the Village Creek Water Reclamation Facility Grit Facility&South Influent PS project. Prior to any expenditure being incurred,the Water
Department has the responsibility to validate the availability of funds.
Submitted for City Manager's Office by: Dana Burghdoff 8018
Originating Business Unit Head: Chris Harder 5020
Additional Information Contact: Farida Goderya 8214
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