Walker Partners/Freese and Nichols Joint Venture - 3/25/2026 :eM BRUSHY CREEK
REGIONAL UTILITY AUTHORITY
A Parrnership of Cedar Park. Leander. and Round Rock
SUPPLEMENTAL CONTRACT NO. 18
TO CONTRACT FOR ENGINEERING SERVICES
FIRM:WALKER PARTNERS/FREESE AND NICHOLS JOINT VENTURE ("Engineer")
ADDRESS: 6504 Bridge Point Parkway, Suite 200, Austin, TX 78730
PROJECT: BCRUA Phase 2 Raw Water Delivery System
This Supplemental Contract No. 18 to Contract for Engineering Services is made by and between
the BRUSHY CREEK REGIONAL UTILITY AUTHORITY, INC.,hereinafter called"BCRUA"
and Walker Partners//Freese and Nichols Joint Venture, hereinafter called the "Engineer."
WHEREAS, BCRUA and Engineer executed a Contract for Engineering Services, hereinafter
called the "Contract," on the 28th day of November, 2018 for the BCRUA Phase 2 Raw Water
Delivery System Project in the lump sum amount of $12,518,037.00 for Engineering Services
excluding Task 5.3.1 —Geotechnical Investigation; and
WHEREAS, BCRUA and Engineer executed Supplemental Contract No. 1 on April 24, 2019 to
amend the scope of services, specifically, Task 6.0, and to increase the compensation by
$75,496.00 to a total lump sum amount of $12,593,533.00 for a total project amount of
$13,697,291.00; and
WHEREAS,BCRUA and Engineer executed Supplemental Contract No. 2 on August 7, 2019 to
amend the scope of services, specifically, Task 5.0 — Special Services, and to increase the
compensation by $42,348.00 to a total lump sum amount of $12,635,881.00 for a total project
amount of$13,739,639.00; and
WHEREAS, BCRUA and Engineer executed Supplemental Contract No. 3 on March 5, 2020 to
amend the scope of services, specifically, Task 6.0 —Agency and Stakeholder Coordination, and
to increase the compensation by $47,000.00 to a total lump sum amount of$12,682,881.00 for a
total project amount of$13,786,639.00; and
WHEREAS,BCRUA and Engineer executed Supplemental Contract No. 4 on March 20, 2020 to
amend the scope of services, specifically, Task 6.0 —Agency and Stakeholder Coordination, and
to increase the compensation by $18,155.00 to a total lump sum amount of$12,701,036.00 for a
total project amount of$13,804,794.00; and
Supplemental Rev.03/2011
0140.4634-47 215829
WHEREAS, BCRUA and Engineer executed Supplemental Contract No. 5 on May 28, 2020 to
amend the scope of services,specifically,Task 5.3.1—Geotechnical Investigation,by reducing the
compensation by$256,761.00 and adjusting the total Time and Materials amount to $846,997.00;
and to reallocate $256,761.00 to Task 5.0 — Special Services and Task 6.0 — Agency and
Stakeholder Coordination, and to modify the provisions for the scope of services for Task 5.0 by
increasing the compensation by $24,212.00 to a total lump sum amount of$12,982,009.00 for a
total project amount of$13,829,006.00; and
WHEREAS,BCRUA and Engineer executed Supplemental Contract No. 6 on October 22, 2020
to amend the scope of services, specifically, Task 5.0 — Special Services, and to increase the
compensation by $27,985.00 to a total lump sum amount of$13,009,994.00 for a total project
amount of$13,856,991.00; and
WHEREAS,BCRUA and Engineer executed Supplemental Contract No. 7 on April 28, 2021 to
amend the scope of services, specifically, Task 5.0 — Special Services, and to increase the
compensation by$137,201.00 to a total lump sum of$13,147,195.00 for a total project amount of
$13,994,192.00; and
WHEREAS, BCRUA and Engineer executed Supplemental Contract No. 8 on June 7, 2021 to
amend the scope of services, specifically, Task 5.0 — Special Services, and to increase the
compensation by $47,238.00 to a total lump sum of$13,194,433.00 for a total project amount of
$14,041,430.00; and
WHEREAS, BCRUA and Engineer executed Supplemental Contract No. 9 on August 17, 2021
to amend the scope of services, specifically, Task 5.0 — Special Services, and to increase the
compensation by $25,000.00 to a total lump sum of$13,219,433.00 for a total project amount of
$14,066,430.00; and
WHEREAS,BCRUA and Engineer executed Supplemental Contract No. 10 on October 15,2021
to amend the scope of services, specifically, Task 6.0 — Agency and Stakeholder Coordination,
and to increase the compensation by$29,800.00 to a total lump sum of$13,249,233.00 for a total
project amount of$14,096,230.00; and
WHEREAS,BCRUA and Engineer executed Supplemental Contract No. 11 on October 20,2021
to modify the provisions for basic engineering services and to increase the compensation by
$745,999.00 to a total Time and Materials amount of$1,592,996.00 for a total project amount of
$14,842,229.00; and
WHEREAS, BCRUA and Engineer executed Supplemental Contract No. 12 on December 14,
2021 to amend the scope of services, specifically, Task 6.0 — Agency and Stakeholder
Coordination, and to increase the compensation by $33,250.00 to a total lump sum of
$13,282,483.00 for a total project amount of$14,875,479.00; and
WHEREAS,BCRUA and Engineer executed Supplemental Contract No. 13 on June 22, 2022 to
amend the provisions for basic engineering services and to increase the compensation by
$22,641,893.00 to a total Time and Materials amount of$24,234,889.00 for a total project amount
of$37,517,372.00; and
2
WHEREAS,BCRUA and Engineer executed Supplemental Contract No. 14 on August 24,2022
to amend the scope of services, specifically, Task 5.0 — Special Services, and to increase the
compensation by $26,810.00 to a total lump sum of$13,309,293.00 for a total project amount of
$37,544,182.00; and
WHEREAS, BCRUA and Engineer executed Supplemental Contract No.15 on July 10, 2023 to
amend the provisions for basic engineering services and to increase the compensation by
$25,095.00 to a total not to exceed amount of $24,259,984.00 for a total project amount of
$37,569,277.00; and
WHEREAS,BCRUA and Engineer executed Supplemental Contract No.16 on June 25, 2025 to
modify the provisions for the scope of services and to increase the compensation by $498,396.00
to a total lump sum of$13,807,689.00 for a total project amount of$38,067,673.00; and
WHEREAS,BCRUA and Engineer executed Supplemental Contract No.17 on November 3,2025
to amend the provisions for basic engineering services and to increase the compensation by
$49,000.00 to a total Time and Materials amount of$24,308,984.00 for a total project amount of
$38,116,673.00; and
WHEREAS, it has become necessary to amend the Contract to amend the provisions for basic
engineering services and to increase the compensation by $129,310.00 to a total Time and
Materials amount of$24,438,294.00 for a total project amount of$38,245,983.00;
NOW THEREFORE,premises considered,BCRUA 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 (2)Not-to-Exceed Sum and Exhibit D. Fee Schedule shall be amended
by increasing by $129,310.00 the not-to-exceed sum amount payable under the Contract for
Engineering Services,to a total not-to-exceed amount of$24,438,294.00 for a total Project amount
of$38,245,983.00, as shown by the attached Addendum to Exhibit D.
IN WITNESS WHEREOF,BCRUA and the Engineer have executed this Supplemental Contract
in duplicate.
[signature pages follow]
3
WALKER PARTN
By:
A on Archer - Senior Vice President
03/17/26
Date
FREESE AND NICHOLS JOINT VENTURE
By:
(,a&,nn. /It"-
John New-Vice President
March 19, 2026
Date
4
BRUSHY CREEK REG UTILITY AUTHORITY,INC.
By:
Anne Duffy,BCRUA Presie
Date
APPROVED S TO FORM:
By; OL) �4�A
Stephan IV Sheets,BCRUA Attorney
s
ADDENDUM TO EXHIBIT B
ENGINEERING SERVICES
GENERAL
Electric service to the Phase 2 Raw Water Delivery System pump station is supplied by Pedernales
Electric Cooperative (PEC)with circuits from both the Nameless and Whitestone substations. Due
to utility policy changes regarding the availability of backup circuits, BCRUA has elected to study
the feasibility of constructing on-site generation.The ultimate buildout generators may be sized to
operate up to two 30 MGD BCRUA pumps, three 9 MGD Cedar Park pumps, and plant auxiliary
systems such as air conditioning,ventilation fans, lights, SCADA systems, and freeze protection
heaters. The purpose of Supplemental Contract No. 18 is to perform a feasibility study of this
design. Additional design services including Final Design will be handled through an additional
supplemental contract.
BASIC SCOPE OF SERVICES
1.0 Project Management and Meetings
1.1 Provide project management and administration including project setup, project
planning, and internal team coordination.
1.2 Attend a kickoff meetings with BCRUA. Kickoff may be either virtual or in person.
1.3 Prepare monthly invoices including a status report that summarizes the work
completed during the invoice period.
1.4 Participate in weekly internal design team meetings (total of 20).
1.5 Attend BCRUA Oversight Committee meetings to provide updates and present
recommendations.
2.0 Feasibility Study
2.1 Calculate generator sizing based on pump curves.
2.2 Work with manufacturers to select basis of design gensets.
2.3 Coordination with ABB for initial selections of medium voltage switchgear.
2.4 Preliminary switchgear building layout and sizing requirements.
2.5 Perform feasibility level site plan development to accommodate major equipment
including generators,fuel tanks,fuel polishing equipment, load bank(s), switchgear
building footprint.
2.6 Evaluate opportunities for project phasing and work sequencing to avoid impacts to
the Sandy Creek electrical system if the project is initiated prior to the completion of
the Phase 2 Raw Water Delivery System Project.
2.7 Evaluate location of generator and generator switchgear building foundations to
avoid conflicts with existing duct banks.
2.8 Study generator refueling operations to determine if a fill station is necessary.
(9)� ker Partners �:�FREESE
3/12/2026 ineers + surveyors �_ AICHOLS
2.9 Assess rigging feasibility for generator placement during construction and future
repairs.
2.10 Provide an electrical site plan, single line diagram, and proposed switchgear building
layout for the feasibility study.
2.11 Develop electrical, instrumentation, and controls designs.
2.12 Evaluate permitting impacts of the proposed improvements.
2.13 Provide input into construction sequencing and scheduling options.
2.14 Provide an opinion of probable construction cost (OPCC), AACE Class 4. The OPCC
will include decommissioning of the Cedar Park Raw Water Intake Barge.
2.15 Prepare a Draft Technical Memorandum (TM). Review and address BCRUA
comments and prepare a Final Technical Memorandum.
Walker Partners r7 O N�CHO�.S
3/12/2026 engineers * surveyors <
ADDENDUM TO EXHIBIT C
WORK SCHEDULE
No modification to the Phase 2 work schedule is required. The Draft Report will be produced in
four months.
@Walker
Partners rM 7 FREESE
3/12/2026 engineers • surveyors NICHOLS
ADDENDUM TO EXHIBIT D
FEE SCHEDULE
Total compensation for services under Supplemental Amendment No. 18 is estimated to be $129,310
as shown below. Total compensation for the Project shall be adjusted from $38,116,673 to
$38,245,983.
Owner shall pay Engineer for Basic Services set forth in Supplemental Amendment No. 18 on the
basis of Standard Hourly Rates as described in Paragraph 2.0 of Exhibit D of the Contract.
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-�Walker Partners ■ FREESE
3/12/2026 engineers . surveyors ��AICHOLS