CM-2025-128 - 5/16/2025Supplemental Contract
0199.1931; 4934-1598-3933
Rev.06/16
84275
1
STATE OF TEXAS §
§
COUNTY OF WILLIAMSON §
SUPPLEMENTAL CONTRACT NO. 6
TO CONTRACT FOR ENGINEERING SERVICES
FIRM: HALFF ASSOCIATES, INC. (“Engineer”)
ADDRESS: 13620 Briarwick, Suite 100, Austin, TX 78729
PROJECT: Wyoming Springs Segment 1
This Supplemental Contract No. 6 to Contract for Engineering Services is made by and between
the City of Round Rock, Texas, hereinafter called the “City” and Halff Associates, Inc., hereinafter
called the “Engineer.”
WHEREAS, the City and Engineer executed a Contract for Engineering Services, hereinafter
called the “Contract,” on the 22nd day of August, 2019 for the Wyoming Springs Segment 1
Project in the amount of $546,776.54; and
WHEREAS, the City and Engineer executed Supplemental Contract No. 1 on January 14, 2021
to amend the scope of services and to increase the compensation by $1,641,846.00 to a total of
$2,188,622.54; and
WHEREAS, the City and Engineer executed Supplemental Contract No. 2 on November 12, 2021
to amend the scope of services and to increase the compensation by $42,481.75 to a total of
$2,231,104.29; and
WHEREAS, the City and Engineer executed Supplemental Contract No. 3 on October 12, 2023
to amend the scope of services and to increase the compensation by $398,323.31 to a total of
$2,629,427.60; and
WHEREAS the City and Engineer executed Supplemental Contract No. 4 on July 25, 2024 to
amend the scope of services and to increase the compensation by $98,435.42 to a total of
$2,727,863.02; and
WHEREAS, the City and Engineer executed Supplemental Contract No. 5 on February 13, 2025
to amend the scope of services and to increase the compensation by $219,814.00 to a total of
$2,947,677.02; 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 $49,462.00 to a total of $2,997,139.02;
NOW THEREFORE, premises considered, the City and the Engineer agree that said Contract is
amended as follows:
CM-2025-128
Supplemental Contract
0199.1931; 4934-1598-3933
Rev.06/16
84275
2
I.
Article 1, City Services and Exhibit A, City Services shall be amended as set forth in the attached
Addendum To Exhibit A.
II.
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.
III.
Article 4, Compensation and Exhibit D, Fee Schedule shall be amended by increasing by
$49,462.00 the lump sum amount payable under the Contract for a total of $2,997,139.02, as shown
by the attached Addendum to Exhibit D.
IN WITNESS WHEREOF, the City and the Engineer have executed this Supplemental Contract
in duplicate.
[signature pages follow]
Supplemental Contract
0199.1931; 4934-1598-3933
Rev.06/16
84275
3
HALFF ASSOCIATES, INC.
By:
Date
Eric J. Ratzman (May 5, 2025 15:52 CDT)
Eric J. Ratzman
Eric J. Ratzman
05/05/2025
CITY OF ROUND ROCK APPROVED AS TO FORM:
By:
Stephanie L. Sandre, City Attorney
Printed Name:
Title:
Date Signed:
Supplemental Contract Rev.06/16
0199.1931; 4934-1598-3933 84275
4
Brooks Bennett (May 16, 2025 11:47 CDT)
Brooks Bennett
City Manager
05/16/2025
Exhibit A
Wyoming Springs Segment 1 – Addt’l Construction Services SC#5 Page 1 of 1
ADDENDUM TO EXHIBIT A
City Services
WYOMING SPRINGS SEGMENT 1
ADDITIONAL CONSTRUCTION SERVICES
FROM CREEK BEND BLVD / BRIGHTWATER BLVD TO SAM BASS ROAD
The City will furnish to the Engineer the following information and/or perform the
following tasks:
• Advanced notification to the Engineer when services are needed, for scheduling
and planning the dewatering.
Exhibit B
Wyoming Springs Segment 1 – Addt’l Construction Services SC#5 Page 1 of 1
ADDENDUM TO EXHIBIT B
Engineering Services
WYOMING SPRINGS SEGMENT 1
ADDITIONAL CONSTRUCTION SERVICES
FROM CREEK BEND BLVD / BRIGHTWATER BLVD TO SAM BASS ROAD
For the scope of services for this contract, the Engineer shall provide professional
services during construction as follows:
Task 16 – Second Mobilization for Aquatics Relocation
16.1 Aquatic Resources Relocation Field Work: Mobilize a second time to
provide aquatics relocation since dewatering is being done by contractor in two
separate phases.
16.2 Aquatics Resources Relocation Reporting: provide additional reporting to
TPWD due to mussels encountered during the dewatering of the first phase.
Task 17 – Review of Alternate Structural Panel Design
17.1 Aguirre & Fields will coordinate with the contractor and pre-cast supplier,
and review an alternate design of the structural aesthetic panels on the Brushy
Creek Bridge.
Task 18 – Temporary Construction Easement (TCE) and Drawing Revisions
18.1 TCE: Meet with property owner on-site; prepare TCE; revise drawings to
accommodate property owner needs; coordinate with city and city’s ROW
acquisition attorney.
EXHIBIT B OVERALL SUMMARY OF DELIVERABLES:
• Aquatic Resources Relocation Report
• Contractor submittal reviews
• TCE Exhibit and sheet revisions for driveway on Sam Bass Road
The Engineer will perform the services to be provided under this agreement out of
Engineer’s office(s) as listed below:
Office Location
13620 Briarwick Drive, Suite 100
Austin, TX 78729
Sub-Consultants:
Aguirre & Fields
Exhibit C
Wyoming Springs Segment 1 – Addt’l Construction Services SC#5
ADDENDUM TO EXHIBIT C
Work Schedule
WYOMING SPRINGS SEGMENT 1
ADDITIONAL CONSTRUCTION SERVICES
FROM CREEK BEND BLVD / BRIGHTWATER BLVD TO SAM BASS ROAD
Construction: September 2024 through December 2025 (estimated)
Exhibit D
Wyoming Springs Segment 1 – Addt’l Construction Services SC#5
ADDENDUM TO EXHIBIT D
Fee Schedule
WYOMING SPRINGS SEGMENT 1
ADDITIONAL CONSTRUCTION SERVICES
FROM CREEK BEND BLVD / BRIGHTWATER BLVD TO SAM BASS ROAD
Services are to be billed on an hourly not-to-exceed basis.
TASK 16 – Aquatics Relocation $ 24,804.00
TASK 17 – Review of Alternate Design $ 15,000.00
TASK 18 – Temp Construction Esmt $ 9,658.00
TOTAL FEE $ 49,462.00
(Hourly NTE)
City of Round Rock EXHIBIT D SC#6
Detailed Fee Schedule
Wyoming Springs Design
Project Sr Review Project Graduate Senior Project Junior Task LABOR SUB DIRECT
TOTAL Principal Engineer Engineer Engineer Environmental Environmental Environmental Hours COSTS COSTS COSTS
(EIT) Manager Scientist Scientist
HOURLY RATES $290.00 $229.00 $185.00 $135.00 $198.00 $148.00 $98.00
TASK DESCRIPTIONS
TASK 16 - Second Mobilization for Aquatics Relocation
16.1 Aquatics Relocation Fieldwork 40 40 40 120 $17,760.00 $1,500.00 $19,260.00
16.2 Aquatics Relocation Reporting 28 28 $5,544.00 $5,544.00
TASK 16 SUBTOTAL 0 0 0 0 68 40 40 148 $23,304.00 $0.00 $1,500.00 $24,804.00
TASK 17 - Review of Alternate Structural Panel Design
$15,000.00 17.1 Review Alternate Design (A&F) 0 $0.00 $15,000.00
TASK 17 SUBTOTAL 0 0 0 0 0 0 0 0 $0.00 $15,000.00 $0.00 $15,000.00
TASK 18 - TCE prep and Drawing Revisions
$9,658.00 18.1 TCE and drawings 8 2 8 40 58 $9,658.00
TASK 18 SUBTOTAL 8 2 8 40 0 0 0 58 $9,658.00 $0.00 $0.00 $9,658.00
TOTAL Estimated Hours 8 2 8 40 68 40 40 206
TOTAL Estimated Fee $ 2,320.00 $ 458.00 $ 1,480.00 $ 5,400.00 $ 13,464.00 $ 5,920.00 $ 3,920.00 $32,962.00 $15,000.00 $1,500.00 $49,462.00
HOURLY RATES $290.00 $229.00 $185.00 $135.00 $198.00 $148.00 $98.00
Halff Associates, Inc. 5/1/2025