HomeMy WebLinkAboutContract 33129-A3 CITY SECRETARY
AMENDMENT No.3 CONTRACT NO.
TO CITY SECRETARY CONTRACT
WHEREAS, the City of Fort Worth (CITY) and AECOM TECHNICAL SERVICES,
INC. , (ENGINEER) made and entered into City Secretary Contract No. 33129,
(the CONTRACT) which was authorized by M&C C-21238 on the 10th day of
January, 2006 in the amount of $ 215, 500 . 00; and
WHEREAS, the CONTRACT was subsequently revised by: Amendment Number 1
in the amount of $430, 000 which was authorized [by M&C # C-23048 on
September 16, 2008; Amendment Number 2 in the amount of $279, 700 which was
authorized [by M&C # C x4964 on June 14, 2011; and
WHEREAS, the CONTRACT involves engineering services for the following
project:
FOREST PARK - BERRY STORM DRAIN WATERSHED PLANNING STUDY; and
WHEREAS, it has become necessary to execute Amendment No. 3 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 July 31, 2013, 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 $48,320.
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 $973,520.
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 wriNW
ory,
below.RECEIVED SEP 19 20i3 Pa e -1-
Page
APPROVED:
City of Fort Worth ENGINEER
AECOM TECHNIC4L SERVICES, INC.
Fernando Costa Don D'Adam
Assistant City Manager Vice President
DATE: -9//6 / DATE: 08/09/2013
APPROV RECOMMENDED:
Douglas W. iersig, Ph.D, P.E
Director, Department of Transportation and Public Works
APPROVED AS TO FORM AND LEGALITY: M&C : 'j (�
Date:
G Ylrl . 1
Doug- a n- /Y-It Ae&n1 keel?
Assistant City Attorney
ATTEST: 0 FORr`L
o�0
KXr
City Secretary .00
LOFFICIAL RECORD
CRETARYRTH,TX
Page -2-
A_COM AECOM 972 735 3000 tel
16000 Dallas Parkway 972 735 3001 fax
Suite 350
Dallas,Texas 75248
www.aecom.com
August 9, 2013
Ranjan Muttiah, PhD, P.E., CFM
Stormwater Management Office
Transportation and Public Works Department
1000 Throckmorton Street,
Fort Worth,TX 76102.
Subject: Additional Services for Zoo Creek Hydraulic Study
Dear Mr. Muttiah,
AECOM commenced work on the Zoo Creek Hydraulic Study in January 2012. Over the past 18 months,
AECOM has developed several potential solutions, both localized and creek-wide,for the City to pursue
along Zoo Creek. As per the agreement between the City and the Fort Worth Zoo, the City will use the
findings of this Study to define the extent of the issues along Zoo Creek and the solutions that can be
implemented to address them. The Study will also provide long-term and short-term solutions that can be
used as a basis for cost-sharing and phasing of some of the solutions along Zoo Creek. Hence, to
ensure the timely completion of this Study, AECOM is requesting additional compensation to address
pending items and to recover cost on previous rework caused by unforeseen technical standard and
report format changes during the course of the Study as listed below.
• In June 2012, AECOM received instructions from the City that several of the technical guidelines
related to modeling techniques were changing and that the Zoo Creek Hydraulic Study needed to
adopt these changes. AECOM had already completed existing conditions modeling at this point
and these revisions led to substantial rework on the hydrologic and hydraulic models as well as
floodplain mapping.
• Zoo Creek was originally scoped for a draft and final report, based on a generic AECOM report
standard, and one round of review comments. In October 2012, AECOM received instructions
after the 75% draft report was submitted that the Zoo Creek report would need to follow a more
specific Open Channel study outline not originally budgeted in the scope of services. AECOM
revised its draft report and resubmitted it as a 90% report in December 2012 as per the new
guidelines. In March 2013, Halff Associates released a Revised Standard Guidelines (RSG)
document that clarifies several items but also requires additional work to ensure adherence.
• The Zoo Creek Hydraulic Study was originally scoped to analyze one (1) proposed conditions
alternative based on the hydrogeomorphic analysis results. Based on the hydrogeomorphic state
of the creek, AECOM prepared one (1)alternative to stabilize the creek over a period of 30 years
and included this alternative in the 90% report. After review of the 90% report, the City requested
that AECOM evaluate the localized flooding problems for short-term solutions. AECOM
performed this additional work and presented the findings to the City in a presentation to the City
and Zoo staff in May 2013. These additional alternatives will also be included in the final report.
Attachment"A" presents the Scope of Work related to the additional effort and Exhibit"B" presents the
Fee Breakdown for the tasks involved. Please feel free to contact Zubin Sukheswalla if you have any
questions or concerns regarding this request. We look forward to completing this Study for the City in a
timely manner.
Sincerely,
"24�_a
on DA eam, PE Zubin SukheswNla,'PE, CFM
Vice President Project Manager
Enclosures:
Attachment"A"—Scope of Services
Exhibit"B"—Fee Breakdown
ATTACHMENT "A"
ADDITIONAL SERVICES FOR
FOREST PARK— BERRY STORM DRAIN WATERSHED PLANNING STUDY(PHASE 2)
AMENDMENT TO CITY SECRETARY CONTRACT NO. 33129
(August 9, 2013)
In accordance with the terms and conditions of Turner Collie& Braden Inc.'s (TCB)Agreement (City of
Fort Worth Contract No.33129), signed January 10, 2006, authorized January 24, 2006,this document
serves as AECOM's request for compensation for Additional Services related to the referenced
project.
Based on discussions with the City over the modeling aspects of Zoo Creek, it was determined that
AECOM (ENGINEER)would revise the Zoo Creek modeling methodology to meet the newest City of
Fort Worth hydrologic modeling standards, which were implemented after substantial modeling effort
was completed on the study, as outlined in the scope of work.
Also, the original Scope of Services involved evaluating one (1) alternative that was based on the
hydrogeomorphic study. The ENGINEER prepared this alternative; however, the geomorphology of
existing creek indicated that there were no short-term solutions for the eventual stability of Zoo Creek.
Based on the effective timeframe of this alternative,the City requested the ENGINEER to pursue
additional short-term fixes to some of the localized flooding occurring along Zoo Creek. In the interest
of meeting the City's agreed upon schedule with the Zoo, the ENGINEER developed additional short-
term alternatives with the understanding that additional compensation for this work would be obtained
after the presentation meeting with Zoo Staff.
The different Scope Items of the study that were impacted due to the additional alternatives evaluated,
revisions in report format, and modeling methodology are listed in the Scope of Additional Services
below.
A. Scope of Additional Services
These additional services include revisions to the hydrologic and hydraulic models due to the changes
in methodology and Study standards. The changes in modeling techniques relating to Task A.6 of the
original Scope of Work are listed below.
1. Task A.6.c- Modifications to Hydrologic Modeling
1, As per the accepted method defined in the scope of work of the concurrent open channel
studies for the City, the additional outflow from the subbasins were proportionally inserted at
1/3 or at 2/3 of the channel segment within the subbasin. The existing model created by the
ENGINEER utilized this methodology, however, based on subsequent discussions with the
City, the ENGINEER shall revise the hydrology and hydraulic models to follow the new City
standards, which states that the outflow from the subbasins are to be inserted at the
downstream portion of the channel segment within the subbasin.
2. The ENGINEER had used a 2-minute hydrologic time step in the existing conditions HEC-
HMS model. After the development of the existing conditions hydrologic and hydraulic
models, the City requested that a 1-minute time step be used. The ENGINEER shall perform
alterations on the models to follow the new City standards, which specifies the use of a 1-
minute time step for the hydrologic models.
3. The Time of Concentration (Tc)flow paths for gutter flow on paved streets is typically modeled
as'Paved Shallow Concentrated Flow' (as per TR-55 guidelines); however,this is no longer
acceptable to the City and the TR-55 Channel Flow method is the preferred method for this
type of flow in Tc computations. Since the ENGINEER had used the 'Paved Shallow
Concentrated Flow'for the existing conditions hydrologic model, additional work is required to
calculate the new Tc's and incorporate them into the hydrologic models. The ENGINEER
shall perform this modification as part of the change in acceptable standards.
2. Task A.6.b and Task A.6.d—Modifications to Hydraulic Modeling
The cumulative impact of the revisions performed in "Task A.6.c—Modifications to Hydrologic
Modeling"on the hydraulic model is expected to be substantial. The Zoo Creek hydraulic model is a
challenging steady-state HEC-RAS model due to the steep slopes, undersized crossings, and
significant overbank flooding. The model has already been extensively debugged for crossing profiles
before the aforementioned changes will occur. The impact of the hydrologic changes shall result in
significant rework related to creating new storage-outflow rating curves in HEC-RAS, debugging the
hydraulic model for crossing profiles, inputting the multi-profile (frequency storm)flows in to HEC-RAS
and debugging again for crossing profiles until the model was reasonably stable. The ENGINEER
shall perform these revisions as part of the modifications to acceptable hydrologic modeling standards.
3. Task A.6.f—Additional Alternatives Evaluated
Additional alternatives shall be evaluated as part of this Study which include investigation and analysis
of the localized flooding issues at the Zoo Engineering building, the Pavilion, Zoo entrance, and the
parking lot and also identifying possible sewer surcharges occurring along Tiger Trail near the Outdoor
Learning Theater. This analysis includes an additional field trip, data collection at the Parks and
Recreation Department vault for onsite utility maps, and preparing cost estimates for potential
solutions. The additional alternatives shall also be included in the final report with descriptions, cost
estimates and location maps.
4. Task A.6.o—Report Format Revision
The original Scope of Services included budget for one round of report review comments and a draft
and final report. In October 2012, the ENGINEER was notified by the City and Halff Associates for the
need to revise the Zoo Creek report to a slightly modified version of Open Channel Study guidelines
after the 75% draft report was submitted for review. This change resulted in significant additional work
associated with report writing, figure formats, reporting procedures, and data capture formatting
standards. The ENGINEER shall prepare a 90%and final report based on the agreed-upon modified
Open Channel Studies format.
5. Task A.6—Additional Project Management
The ENGINEER shall perform additional Project Management and coordination activities with the City
related to the aforementioned modifications to the original Scope of Services.
B. Exclusions and Limitations
The ENGINEER shall follow the primary scope of work while incorporating the changes as specified in
this amendment. Only changes specified in this document are to be included in this amendment.
C. Schedule
The work associated with conforming to the updated City standards shall be implemented and
submitted to the City for review under the 90% Draft Report submittal.
D. Proposed Basis of Compensation and Liability
Total compensation for this supplemental shall be a lump sum amount not-to-exceed $48,320 (Forty-
Eight Thousand Three Hundred and Twenty Dollars and No Cents). Since work associated with this
effort has already been expended, the ENGINEER shall bill this amount with the invoice for the current
billing cycle of the authorization.
ATTACHMENT "B"
ADDITIONAL SERVICES FOR
FOREST PARK— BERRY STORM DRAIN WATERSHED
PLANNING STUDY (PHASE 2)
ZOO CREEK HYDRAULIC STUDY
CITY SECRETARY CONTRACT NO. 33129
COMPENSATION AND PAYMENT SCHEDULE
I. Compensation
A. The Engineer shall be compensated a total project fee of $48,320.00 for
Additional Services. Payment of the total lump sum fee shall be considered full
compensation for the services described in Attachment "A" for all labor materials,
supplies and equipment necessary to complete the project.
B. The Engineer shall be paid in accordance with "Exhibit 13-1", Supplement to
Attachment B. Each invoice from the Engineer shall be verified as to its accuracy
and compliance with the terms of this contract by an officer of the Engineer.
C. A summary of current hourly billing rates is provided in Exhibit "13-2". Additional
tasks that may be assigned, not currently in the scope, may be billed and paid on
an hourly basis at the billing rates provided in Exhibit "13-2". No additional tasks
will be performed without prior written authorization from the City of Fort Worth.
D. Professional Services Fee summary is provided in Exhibit "13-3".
E. Total project fees including MWBE participation is provided in Exhibit "13-3A".
II. Schedule
A. The Engineer shall follow the following schedule for partial submittals
Attachment "A", Task 1, 2, and 3 deliverables shall be submitted to the City with
the final report.
Attachment "A", Task 4 Final Report deliverable shall be submitted to the City 90
days from Notice-to-Proceed.
B. The Engineer's estimate of the schedule of partial/final deliverables is contingent
on the timely review of deliverables by the Client and/or Client's representative.
ATTACHMENT"B"
Page 1 of 1
EXHIBIT "13-1"
(SUPPLEMENT TO ATTACHMENT B)
ADDITIONAL SERVICES FOR
FOREST PARK — BERRY STORM DRAIN WATERSHED
PLANNING STUDY (PHASE 2)
ZOO CREEK HYDRAULIC STUDY
CITY SECRETARY CONTRACT NO. 33129
METHOD OF PAYMENT
8
PROGRESS REPORT REQUIREMENTS
I. Method of Payment
Partial payment shall be made to the Engineer monthly upon City's approval of an
invoice from the Engineer outlining the current labor and expenses of the total
project. The aggregate of such monthly partial fee payments shall not exceed the
following:
The sum is not to exceed 95% of the total lump sum fee after the ENGINEER
submits the draft Final report for review.
The balance of fees, less previous payments, shall be payable after delivery of the
FINAL report and electronic files.
II. Progress Reports
A. The Engineer shall submit to the designated representative of the Director of
the Department of Transportation and Public Works monthly progress reports
covering all phases of the analysis in the format required by the City.
B. Periodic reports concerning MWBE participation shall be submitted as required
by the MWBE Office.
EXHIBIT"B-1"
Page 1 of 1
I6ganrA, °,aA ME—)
FOREST — I�LEZI
IIIIIIENTTO Clly—1—Y 11 ILIA
LEVEL OF EFFORT SPI-11111
LaborCategory
Toteb $ 48,320 $ 47,840 480 403 118.]1 4 10 25 112 252 $ 480 $ $ 410 $
Total Total Total Total Labor Ave OA Prof Dir. S,Proj Mgr Proj Mgr. PE Tech Admin Acct Total ODC
Task Mana er Cos[ Labor Coat ODC Hours Ha1n Rale $240.00 $200.00 $ 160.00 $140.00 $100.00 $ 75.00 $ 65.00 $ 75.00 Tavel Printing (—I subs) Subconsultanl pl
Cost Cod, Task Desch tbn $ $ $ $ Enla hoore nl$below $ $ $ $
$ $ $ $
Task A.6.c.Modificatlona to Hydrdogic Motleling
Reviseflav change loaUons $ 540 $ 540 $ 108.00 1
Changeto.2-min to l-min firs.step $ 340 $ 340 $ - 3 $ 113.33 1 2 $
Revise TccalwlMiona $ 940 $ 940 $ - ] $ 134.29 1 1 1 4 $
Task A.6.b. Modifications to Hytlraclic Modeling
& Create and debug naw stoag—.low profiles $ 5,680 $ 5,680 $ - 54 $ 105.19 2 4
A.6.d Input and debug kN—oy storm profiles $ 4,880 $ 4,880 $ - 46 $ fo6.09 2 4 40 $ -
Revisefloodplainmapping $ 1,320 $ 1,320 $ - 11 $ 120.00 1 2 8 $ -
TaskARI PddiUonal Alernalives EvaWg
Daly oollecliontfidd visit(21npe) $ 4,060 $ 3,840 $ 220 32 $ 120.00 16 16 $ 220 $ 220
Develop t.,(4)localized al.n.A.sdufions $ 6:_ $ 6,410 $ - 51 $ 12].06 1 2 4 20 24 $
Prepare mt esfiaales br aIwntaflves $ 2,680 $ 2,680 $ 23 $ 118.52 1 2 4 16 $
F,s tionbCRyand Zcoslafl $ 2,150 $ 2,040 $ 110 15 $ 138.00 i 2 8 4 $ 110 $ 110
Incmporala alternatives into final report $ 5,]fi0 $ 5,]fi0 $ - 4] $ 122.55 1 2 4 12 28 $ -
Teak A.6.g.Report Format Revision
Revlse re port bnnat $ 4,040 $ 4,040 $ - 35 $ 115.43 1 2 8 24 $
Create addiU.n.1 report figures $ 4,040 $ 4,040 $ - 35 $ 115.43 i 2 8 24 $ -
Task A.6. A difional Pmlecl Management - $ 5,410 $ 5,260 $ 150 39 $ 134.8] 2 4 23 10 $ 150 $ 150
Total $ 48,320 $ 47,840 $ 4801 403 118.71 4 10 25 112 252 $ 480 $ $ 410 $
EXHIBIT "B-3"
(SUPPLEMENT TO ATTACHMENT B)
ADDITIONAL SERVICES FOR
FOREST PARK — BERRY STORM DRAIN WATERSHED
PLANNING STUDY (PHASE 2)
ZOO CREEK HYDRAULIC STUDY
CITY SECRETARY CONTRACT NO. 33129
PROFESSIONAL SERVICES FEE SUMMARY
TASK FEE
Task A.6.c - Modifications to Hydrologic Modeling $1,820
Tasks A.6.b and A.6.d - Modifications to Hydraulic Modeling $11,880
Task A.6.f-Additional Alternatives Evaluated $21,130
Task A.6.g - Report Format Revision $8,080
Task A.6 -Additional Project Management $5,410
SERVICE TOTAL $48,320
EXHIBIT"B-3"
Page 1 of 1
EXHIBIT "B-3A"
(SUPPLEMENT TO ATTACHMENT B)
ADDITIONAL SERVICES FOR
FOREST PARK — BERRY STORM DRAIN WATERSHED
PLANNING STUDY (PHASE 2)
ZOO CREEK HYDRAULIC STUDY
CITY SECRETARY CONTRACT NO. 33129
SUMMARY OF TOTAL PROJECT FEES
Consultinq Firm Prime Responsibility Amount Percent
PRIME ENGINEER:
Engineering Services, Proj. Mgmt. $48,320 100%
SUB ENGINEER:
N/A $0 0%
I otal for Professional Services $48,320 100%
Sub-Participant Scope of Services Total Fee MWBE Fee Percent
N/A N/A $0 $0 0%
Non-MWBE Participation
None 0%
EXHIBIT"B-3A"
Page 1 of 1
Y
ATTACHMENT"C" -PROJECT SCHEDULE
ADDITIONAL SERVICES FOR
FOREST PARK-BERRY STORM DRAIN WATERSHED PLANNING STUDY(PHASE 2)
AMENDMENT TO CITY SECRETARY CONTRACT NO.33129
ID Task Name Duration Start Finish October 2013 j November 2013 _ December 2013
O 28 1 4,7 1011311611912225T'28'31 316'9112115118212427[M 316 9 121151181
1 Modifications to Hydrologic Modeling 3 days Tue 10/1/13 Thu 1013/13
2 0 Revise flow change locations 1 day Tue 10/1/13 Tue 1011/13
3 Change from 2-min to 1-min time step 1 day Wed 10/2/13 Wed 1012113
4 Revise Tc calculations 1 day Thu 10/3/13 Thu 1013113
--5-
6 Modifications to Hydraulic Modeling 17 days Fri 1014/13 Mon 10128113
7 Create and debug new storage-outflow profiles 10 days Fri 10/4/13 Thu 10/17/13
8 Input and debug frequency storm profiles 5 days Fri 10/18/13 Thu 10124/13
9 Revise floodplain mapping 2 days Fri 10/25/13 Mon 10/28/13
10
�11�- Report Format Revision 15 days Tue 11126113 Mon 12116113
12 Revise report format 10 days Tue 11/26/13 Mon 12/9/13
13 Create additional report figures 5 days Tue 12/10/13 Mon 12/16/13
14
7'm
15 Additional Alternatives Evaluated 20 days Tue 10/29/13 Mon 11/25/13
16 Data collection/field visit(2 trips) 2 days Tue 10/29/13 Wed 10/30/13
17 1, Develop four(4)localized alternative solutions 5 days Thu 10/31/13 Wed 11/6/13
-—1
18 Prepare cost estimates for altemalives 3 days Thu 11/7/13 Mon 11/11/13
19 11 Presentation to City and Zoo staff 5 days Tue 11/12/13 Mon 11/18/13
20 Incorporate alternatives into final report 5 days Tue 11/19/13 Mon 11/25/13
21 1
22 iQ Additional Project Management 55 days Tue 10/1113 Mon 12/16/13
1 MEOW
Task Milestone External Tasks
ATTACHMENT"D"
PROJECT SCHEDULE SplitSummary External Milestone
Progress Project Summary Deadline �1
Page 1