Contract - Plummer Associates, Inc. - 7/24/2025 +STATE OF TEXAS §
COUNTY OF WILLIAMSON §
SUPPLEMENTAL CONTRACT NO. 3
TO CONTRACT FOR ENGINEERING SERVICES
FIRM: PLUMMER ASSOCIATES,INC. ("Engineer")
ADDRESS: 1320 S. University Drive, Suite 300, Fort Worth,TX 76107
PROJECT: BCRWWS East WWTP Expansion (Construction Phase Services)
This Supplemental Contract No. 3 to Contract for Engineering Services is made by and between
the City of Round Rock, Texas, hereinafter called the "City" and Plummer Associates, Inc.,
hereinafter called the"Engineer."
WHEREAS, the City and Engineer executed a Contract for Engineering Services, hereinafter
called the "Contract," on the 9th day of April, 2020 for the BCRWWS East WWTP Expansion
(Construction Phase Services) Project in the amount of$4,931,846.00; and
WHEREAS, the City and Engineer executed Supplemental Contract No. 1 on the 14th day of
September,2023 to amend the scope of services and to increase the compensation by$144,715.11
to a total of$5,076,561.11; and
WHEREAS, the City and Engineer executed Supplemental Contract No. 2 on the 22nd day of
February, 2024 to amend the scope of services and to increase the compensation by $250,000.00
to a total of$5,326,561.11; and
WHEREAS,it has become necessary to amend the Contract to modify the provisions for the scope
of services and to increase the compensation by$1,456,058.00 to a total of$6;782,619.11;
NOW THEREFORE,premises considered, the City and the Engineer agree that said Contract is
amended as follows:
I.
Article 2, Engineering Services and Exhibit B,Engineering Services shall be amended as set forth
in the attached Addendum to Exhibit B. Exhibit C, Work Schedule shall be amended as set forth
in the attached Addendum to Exhibit C.
II.
Article 4, Compensation and Exhibit D, Fee Schedule shall be amended by increasing by
$1,456,058.00 the maximum amount payable under the Contract for a total of$6,782,619.11, as
shown by the attached Addendum to Exhibit D.
Supplemental Contract Rev.06/16
0199.20209;4909-1472-6226 84275
/ql
IN WITNESS WHEREOF,the City and the Engineer have executed this Supplemental Contract
in duplicate.
PLUMMER ASSOCIATES,INC.
By:
yiel•,t1C<P.1L
./77.2- t
Date
Supplemental Contract Rev.06/16
0199.20209;4909-1472-6226 84275
2
CITY OF ROUND ROCK APPROVED AS TO FORM:
By: ,.
Craig Mo an, or Stephanie L. Sandre, City Attorney
qkgi/ZD25
Date
Supplemental Contract Rev.06/16
0199.20209;4909-1472-6226 84275
3
ADDENDUM TO EXHIBIT B
Engineering Services
CITY OF ROUND ROCK
Brushy Creek Construction Services Additional Engineering Services
Task 1—RPR Services
Onsite Resident Project Representative (RPR)Services
1.1 During construction of the Brushy Creek Construction Phase Services, Plummer shall provide an
onsite resident project representative (RPR), in accordance with the CITY OF ROUND ROCK
recommendations, who shall review the work of the construction contractor and report to CITY OF
ROUND ROCK, the Construction Manager, and the construction contractor opinions of the
contractor's fulfillment of these recommended actions and adherence to the plans and
specifications. The RPR shall be project representative and shall endeavor to protect CITY OF
ROUND ROCK against defects and deficiencies in the work and to observe the work is carried out
in conformance with the plans and specifications. However, the RPR neither guarantees the
performance of the contractor nor assumes responsibility for the contractor's failure to perform work
in accordance with the contract documents. For budgeting purposes: Substantial Completion is
projected to be on September 30, 2025 and Final Completion is projected on December 31, 2025.
1.2 Resident Project Representative Services/Construction Manager
1.2.1 The RPR will be the primary point of contact and communication for all parties on the
Brushy Creek Expansion project.The RPR shall always have access to the Work whenever
it is in preparation or progress. The onsite project representative shall be provided as
described below:
1.2.1.1 Brushy Creek Construction Services RPR — Average 40 hours per week, for the
duration of the project until substantial completion of the project.
1.2.1.2 Brushy Creek Construction Services RPR—Average 8 hours per week,for the duration
of the project from substantial completion until Final completion of the project.
1.2.1.3 Brushy Creek Construction Services CM — Average of 24 hours per week for the
duration of the project and EIT-Average of 18 hours per week until Final completion of
the project.
1.3 Construction Administration
1.3.1 Plummer will provide the following services for this amendment to the contract:
1.3.1.1 Prepare weekly meeting agendas and minutes.
1.3.1.2 Review and submit logs such Submittals, RFI, Schedules, etc. used to track progress
of the project.
1.3.1.3 Attend weekly meetings and site visits by the CM and RPR.
1.3.1.4 Plummer will continue to track Punchlist items documented in Projectmates.
1.3.1.5 Plummer will support Round Rock on final pay estimates and project close out
documents.
1.3.1.6 Plummer has allowed 24 hours for support for final change orders as required by
contract.
1.4 Construction Observation
1.4.1 Field Observation: The onsite RPR will provide field observation for conformance of the
contractor's work with plans and specifications and notify the contractor and City of Round
Rock of any observed nonconforming work and monitor the progress of the contractor's
corrective actions. The onsite RPR shall not be responsible for means, methods,
techniques, sequences, or procedures of construction selected by the contractor or the
safety precautions and programs incident to the work of the contractor.
1
1.4.2 Project Documentation: The RPR will maintain daily reports, including project progress,
notes, photos, videos, for monitoring and documenting the observed work in a field report
for each visit.The daily report will include notes on personnel onsite,observed construction
activities, and testing agencies. RPR report is attached to this scope of work.
1.4.3 Exclusions: Plummer hereby excludes any work not specifically listed above such as as-
built drawings, construction administration, or Engineer of Record duties. Plummer has
not included additional time for arbitration of change orders beyond substantial completion.
Task 2—Engineering Support
2.0 Engineering Support
2.1 Plummer to provide engineering support through substantial and final completion of the
project. Project Engineering Manager will be available 8 hours per week until substantial
completion. From the substantial and final completion of the project, the engineer will be
available 8 hours per month.
2.2 Plummer's Electrical subconsultant provides additional services as stated in the Fee
Schedule
Task 3—PLC/HMI Programming and Field Verification Services
3.0 Programing &Field Checkout Services, PLC and HMI Modifications and Additional Scope
3.1 Field Checkout & Startup: Plummer to provide Field Checkout and Commissioning
services, in addition to modifications to the PLC and HMI programs for the remaining
areas of work for the following items:
3.1.1 Area 400: Plummer to provide field checkout services for Train 1 Aeration,
Basins 1 & 2. This includes making communications with the mixers,
testing the I/O, configuring the VFDs, testing the control loops, debugging
any PLC logic, and providing any updates to the HMI system
3.1.2 Area 400: Plummer to provide field checkout services for Train 1 Aeration,
Basins 3 & 4. This includes making communications with the mixers,
testing the I/O, configuring the VFDs, testing the control loops, debugging
any PLC logic, and providing any updates to the HMI system
3.1.3 Area 400: Plummer to provide field checkout services for Train 2 Aeration,
Basins 1 & 2. This includes making communications with the mixers,
testing the I/O, configuring the VFDs, testing the control loops, debugging
any PLC logic, and providing any updates to the HMI system
3.1.4 Area 400: Plummer to provide field checkout services for Train 2 Aeration,
Basins 3 & 4. This includes making communications with the mixers,
testing the I/O, configuring the VFDs, testing the control loops, debugging
any PLC logic, and providing any updates to the HMI system
3.1.5 Area 500: Plummer to provide field checkout services for Influent Lift
Station ILS2. This includes providing communications to the replaced or
repaired VFDs, decommissioning temporary motor starters, and making
replacements to the HMI database to restore the proper addressing of
these systems
3.1.6 Area 550: Plummer to complete field checkout services for the Alum Feed
Systems at the Chemical Building. This includes the time required to field
test the I/O, configure the VFDs, configure and tie-in to ethernet devices,
test and debug PLC code, and verify HMI database and screens.
3.1.7 Area 650 RAS/WAS: No items
3.1.8 Area 750 Reuse System: No Items
3.1.9 Area 800 East Electrical Building: Plummer to field test I/O, configure
VFDs for communication to the PLC, configure and test ethernet
instrumentation, field test control loops, provide any required PLC code
2
changes and make data available to the HMI, as well as modify any links
to the HMI to make them available
3.1.10 Area 1100 Sludge Storage Tanks: Plummer to field test I/O, configure
VFDs for communication to the PLC, configure and test ethernet
instrumentation, field test control loops, provide any required PLC code
changes and make data available to the HMI, as well as modify any links
to the HMI to make them available
3.1.11 Area 1350 Dewatering Building: Plummer to field test I/O, including
confirmation of hopper level signals and flowmeter level signals on belt
presses 3 &4. Verify HMI data is reported correctly
3.1.12 Area 1500 Chemical Building: Plummer to field test I/O, including
confirmation of all control loops, and other ethernet devices. Plummer will
field test and update PLC code and remap any tags required for the HMI
3.2 Additional Scope: Additional scope requested by Operations is as follows:
3.2.1 Tablets: Plummer will procure, install and configure Tablets, with wall
mounts for remote display and control of new PLC cabinet areas that
replace the older model touch screen panel displays. Tablets will be
installed in the following areas:
3.2.1.1 New Blower/ILS2 Electrical Room
3.2.1.2 Central Electrical Building
3.2.1.3 North Electrical Building
3.2.1.4 East Electrical Building
3.2.1.5 Dewatering Building
3.2.1.6 Trains 1 and 2 RAS WAS Building
3.2.1.7 Reuse Electrical Building
3.2.1.8 Spare
3.2.2 Database Tags: Update database tags for consistency
3
ADDENDUM TO EXHIBIT C
Work Schedule
Attached Behind This Page
ID Task Task Name Baseline Start Baseline Finish Basel net 2020 Nall 2.2020 Half 1,2021 0,150 2021 Hall 1,2022 Half 2,2022 He 1,2023 Half a 2023 Hall I 2024 Hall 2,2024 Nag 1,2025 Malt 2,2025
Mode Estimated Finish MA M I I A 5 0 N D 1 F M A M I 1 A S 0 N D I F M A M I I A 5 0 N D 1 F M A M I I A 5 0 N D I F M A M 1 1 A 5 0 N D I F M A M 1 1 A 5 0 N�
1 { Construction Project Management Mon 3/30/20 Tue 9/26/23 Wed 12/31/25
2 # 0.Pre-Construction Activities Mon 3/30/20 Mon 6/1/20 Mon 6/1/20 I=
3 # Engineers Notice to Proceed from City Coun Mon 3/30/20 Mon 3/30/20 Mon 3/30/20 •3/30
4 S Pre-Construction Meeting Tue 3/31/20 Tue 3/31/20 Tue 3/31/20 i 3/31
5 # General Contractors Mobilization Wed 4/1/20 Mon 6/1/20 Mon 6/1/20 e_
6 # 1.Engineering Services During Construction Wed 4/15/20 Tue 1/31/23 Wed 12/31/25 F
7 # Monthly Engineer Site Visits Thu 5/28/20 Thu 1/26/23 Wed 12/31/25
41 # Special Engineer Inspections(as arranged Fri 5/1/20 Fri 3/31/23 Fri 3/31/23
by CM)
55 # Preselected E quipment Coordination(as Fri 5/1/20 Thu 4/7/22 Tue 9/30/25
directed by CM)
56 # Engineer assistance with Submittal Reviews Wed 4/15/20 Sun 4/3/22 Wed 12/31/25
and any associated document control or
processing(RFIs,CMRs and PCMs)
57 # 2.Onsite Management&Admin Services Mon 3/30/20 Tue 1/31/23 Tim 9/30/25 -._
58 # Submittal Reviews and any associated Mon 3/30/20 Sat 10/1/22 Wed 12/31/25 Al
document control or processing(RFIs,
59 # Site Visit Coordination Mon 3/30/20 Sat 10/1/22 Wed 12/31/25
60 # Construction Observation Documentation Mon 3/30/20 Sat 10/1/22 Wed 12/31/25
61 # Monthly Construction Progress Meetings Wed 5/6/20 Fri2/30/23 Wed 12/31/25 1 I I I III III III I
97 # Monthly Progress Reports Fri 4/24/20 Tue 3/28/23 Wed 12/31/25 0 00 O O O 0** 0 0 0 O O O O O O *0 a5 0 0 0 O O O 00 0 0 0 O O O 00
135 # Monthly Pay Estimate Reviews Mon 5/4/20 Frl 3/3/23 Wed 12/31/25 I I 11 I I I II I I I I I I I I I I I I I I I I I I I I I I I I I I I
172 # Testing&Special Inspections Mon 6/1/20 Fri 11/5/21 Tue 9/30/25
173 # Milestone Substaintlal Completion Review' Mon 6/1/20 Tue 1/31/23 Tue 9/30/25 1111111.1.11.11111.111..1111
174 # NTP Construction Activities on Site Mon 6/1/20 Mon 6/1/20 Mon 6/1/20 F--
175 # Phase 1-Early Improvements Mon 6/1/20 Mon 5/31/21 Mon 5/31/21 1♦5/31
176 # Phase 2b-New Treatment Train& Mon 6/1/20 Wed 8/31/22 Wed 8/31/22 j 8/31
Associated Facilities substaintlal
177 # Phase 3-Modification to Aeration Basin- Mon 6/1/20 Fri 8/19/22 Tue 4/30/24 w
178 # Phase 4-Project substaintial completion Mon 6/1/20 Sat 11/12/22 Tue 9/30/25 T.9/30
except for phase 5
179 # Phase 5-Mods to Aeration Basin Train 1 Mon 6/1/20 Wed 1/4/23 Tue 9/30/25 T.9/30
and conversion from gas to liquid CI feed
180 # Final Completion Mon 6/1/20 Tue 1/31/23 Wed 12/31/25
181 # 3.Post Construction Services Mon 6/1/20 Tue 9/26/23 Wed 12/31/25
182 #) Engineer Substantial Review NA NA Tue 9/30/25
183 #2 Engineer Final Completion Review Wed 12/31/25 3
184 It Start-up Services Mon 6/1/20 Tue 9/26/23 Tue 9/30/25
185 411 Phase 1-Early Improvements Mon 6/1/20 Mon 6/1/20 NA .6/1
186 # Phase 2a-New Treatment Train& Mon 6/1/20 Tue 5/17/22 Tue 5/17/22 j 5/17
Associated Facilities
187 # Phase 3-Modifications to Aeration Basin Mon 6/1/20 Tue 9/26/23 Tue 9/26/23 T.9/26
Train 2&New UV
188 # Phase 4-Project Substaintial Completion Mon 6/1/20 Sat 11/12/22 Tue 9/30/25 T.9/30
189 # Phase 5-Modifications to Areatlon Basin Tue 6/2/20 Thu 1/5/23 Tue 9/30/25 T.9/30
Train 1 and conversion from gaseous to i
liquid chemical feed I
190 # Final Completion Mon 6/1/20 Tue 1/31/23 Wed 12/31/25
191 # Record"As-built"Drawings Fri 1/6/23 Mon 3/6/23 Wed 12/31/25 s r s
192 # O&M Manual Assembly Fri 1/6/23 Mon 3/6/23 Wed 12/31/25
193 # 4.Project Management end Quality Assuranc Mon 3/30/20 FA 3/31/23 Wed 12/31/25
Task IIIIIIIIIIIIIN Summary 1—... 1 Inactive Milestone Duratian.only IIIIFM Stan-only I External Mikstone Manual Progress
Project Plummer Construction
Date:Thu 6/5/25 STA Project summary I 1 Inanity Summary Manual Summary Rua*p Finish-only3 Deadline 4
Milestone ♦ Mactise Task Manual Task 11 Manual Summery 11 External Tasks Progress
__.—_ Page 1
ADDENDUM TO EXHIBIT D
Fee Schedule
Attached Behind This Page
City of Round Rock
Brushy Creek Expansion to 30 MGD-Amendment 3 Construction Phase Services
Exhibit D
l !Snr Electrical
Principal I Proj Mgr 1 Eng. I Cons Mgr i RPR i EIT Programmer Total Labor Subs and Expenses Total Fee Percent of
(hrs) , (hrs) I (hrs) (hrs) (hrs) (hrs) I (hrs) Hours Fee(f)
FNI Expenses (f) Total Fee
1 Resident Project Representative and Construction Management 96 157 34 822 2,390 960 0 4,459 f 716,275 $ 138,347 $ 52,923 $ 907,545 63%
1 1 Unbilled amount through Apnl/8,2025 24 157 34 198 1,494 480 0 $ 388.355 $ 138,347 $ 8,923 $ 535,625
Planned hours from April 19,2025 through to Substantial Completion
1.2 (Sept 2025-20 wks) 40 0 0 480 800 360 0 $ 299,600 $ 33,000 $ 332,600
Planned hours from Substaintial Completion to Final(December 2025-12
1.3 wks) 32 0 0 144 96 120 0 $ 78,320 $ 11.000 $ 89,320
14 Credit 0 0 0 0 0 0 0 $ (50,000) $ (50,000)
2 Engineering Support Services 37 270 0 0 0 205 0 512 $ 110,755 $ 109,458 $ - $ 220,213 15%
1.0 Unbilled amount through April 18,2025 5 62 0 0 0 205 0 $ 47,875 $ 109,458 $ 157,333
Planned amount from April 2025 through to Substaintial Completion
2.1 (September 2025-20 wks) 20 160 0 0 0 0 0 $ 46,800 $ 46,800
Planned hours from Substaintial Completion to Final(December 2025-12
21 wks) 12 48 0 0 0 0 0 $ 16,080 $ 16,080
3 PLC/HMI Programming and Field Verification SeMces 0 35 160 0 0 0 1,394 1,589 $ 300,700 $ - $ 20,700 $ 321,400 22%
3.0 Unbilled amount through April 18,2025 0 3 0 0 0 0 510 513 $ 90.000 $ - $ 90,000 6%
3 1 Field Checkout 8 Startup 0 30 160 0 0 0 800 990 $ 195,500 $ - $ 195,500 13%
31 Additional Scope'Provide and Configure Tablets _ 0 2 0 _ 0 0 0 84 86 $ 15,200 $ 20,700 $ 35,900 2%
TOTAL LABOR i = I
1
Total Labor Hours 133 , 462 194 I 822 2,390 1,185 1,394 6,560 $ 1,127,730.00 $ 1,449,157.70
Labor Rates per Hour $340 1 $250 $300 i $250 $140 $150 $175
Total Amounts by Labor Category $ 45,305 I$ 115,500 $ 58,200 1$ 205,500 $ 334,800 $ 174,675 $ 243,950 $ 1,127,730 $ 247,805 $ 73,623 $ 1,449,158
Labor Category Percent of Total Labor 4.0% I 10.2% _ 5.2% 18.2% 29.7% _ 15.5% 21.6% 77.8%
TOTAL EXPENSES isee breakdown below)
Total Subconsultants $ 247,805
Total Relmbursables $ 80.523
GRAND TOTAL- $ 1,456,058
SUBCONSULTANT EXPENSES REIMBURSABLE EXPENSES-Additional
Code' Description Budget($$) 1 Markup 1 Fee(SWCode I Budget(8$) Markup i Fee($$$)
__CA Architect Consultant $ - I.10 $ RA Laboratory Analysis 1.15 $ -
CC Civil Engr Consultant $ - 1 10 $ RC Technology Tablets$ 24,000 1.15 $ 27,600
CE Electncal Consultant $ 225,277 110 $ 247_805 RH Histtxical 1.15 $ -
CG Geotechnlcal Consultant(under Phase 1.5) $ - 1.10 $ - RI In-House Reproduction 1.15 $
CM Mechanical Consultant _$ - 1.10 $ - RL Long Distance Telephone 1.15 $ -
CO Other Consultant $ - 1.10 f RM Employee Mileage II 1.15 $ -
CS Structural Consultant $ - 1.10 $ - RO Other Software Exp s s 1.15 $ -
CV Surveying Consultant $ - 1.10 $ - RP _Purchased Services 1.15 $ -
_ C1 $ - 1.10 $ - RR_ Reproduction 1.15 $ -
C2 $ - 1.10 $ - RS Shipping,Delivery,Postage 1.15 $ -
C3 $ - 1.10 $ - RT Travel,Meals,Lod $ 40,000 1.10 $ 44,000
C4 $ - 1.10 $ - RU Telecommunications 1.00 $
C5 $ - 1.10 5 - R1 i3D Scanning Equipment _ 1,15 $ -
C6 $ - 1,10 $ - R2 'Unbll dT $ 7,759 1.15 $ 8,923
28,TOTAL SUBCONSULTANT EXPENSES $ 2277 8 247,005 TOTAL REIMBURSABLE EXPENS�$ 71,7511 $ 80,523
Plummet Profact Fin Summon E.B
BNelty Creek Region WWTP-Amendment 3 Basic Sarv,ca. $ .. . Basic Services
1/28/2025 Spacial Se,vn.es 5 Special Services
Detelled Cost Breakdown Total P,ole,J S Total Project
Tasks Labor !aeon.. 'NW
BST Task(tor Basic or Task Task Dascripbon Total Hours total Labor TeC,Cbar95 Maes lhn, Total Expense Teal Effort
violet.Setup) Special Eflari Effect
Tales 1 2 Monthly 136a Visits(11 5 H2Vrs Eecn/ ' •
',,ra usMw,Net 1023 0 De 2023 62 Veils) 23 23 a 8.748 46 391 9,139
94494 2024 to Dec„ter 2024(8,McGne/11-Snuster1 92 127 83.242 219 1.857 45,099
90n,;patad 2025(6 Visas) 69 69 in 28,204 138 0,'1 .'S0 1.881 28,125
Taak1.2 B4Weekly Site Visits(65 Hours Each) - - -
November 2023 to December 2023(3 Visits) 20 20 39 7.417 39 332 7,748
Jenua,y 2024 to Decant.,2024(13 Visits) 85 65 169 32 139 169 1,437 33,578
Anik:pated 2025(10 Visits) 65 65 ,30 2+7., 130 1006 000 2380 27,103
Task 1.8 Requests for Information/9 Hours Each/ - '
Nua,nber 20231u December 2023 11 Issues) 9 9 • 18 153 3,576
January 2024 to Decanter 2024(10•McGee r S•Snoats'I , 45 - 135 11ND 24.618
Anticipated 202533 Issues) 72 ., 144 331 300 5 2057 29,442
Task 6.101M8ty Assurance/Project Management - - • -
Novenber 2023 to Dece915r 2023 4 1 393 4 34 1,427
January 2024 to Decent,2024 27 9.403 27 5 230 9,637
Anitp,ed 2025 10 6 In 5655 16 S 136, 5.791
•
Total BOWS/Ownt% 524 514 a1 6 1.085 1.085 2297 1050
Total Effort $ 74,000 S 122,792 8 14,279 9 2,173 _ 213.243 $ 9218 S 1608 5 I ion S 12.O3a 225.277
1 of 1 tatps'Meese-my anarepant cum/o,scrwedaed_M,nn_6eese_can/DocumenWDwo,n.ntad9CE ConWuciv,Fee Eateries/Amendment 3-Coat b Time°swage 1.17-2025rBack 3-Coet Per Hour Task Breakdown Nam 1/2812025