CM-2026-129 - 5/1/2026 STATE OF TEXAS §
COUNTY OF WILLIAMSON §
SUPPLEMENTAL CONTRACT NO. 5
TO CONTRACT FOR ENGINEERING SERVICES
FIRM: PLUMMER AND ASSOCIATES,INC. ("Engineer")
ADDRESS: 8911 N Capital of TX Hwy,Building 1 Suite 1350,Austin,TX 78759
PROJECT: BCRWWS East WWTP Tertiary Filters Preliminary Engineerins
Report(PER)
This Supplemental Contract No. 5 to Contract for Engineering Services is made by and between
the City of Round Rock, Texas, hereinafter called the "City" and Plummer and Associates, Inc.,
hereinafter called the"Engineer."
WHEREAS, the City and Engineer executed a Contract for Engineering Services, hereinafter
called the"Contract,"on the 8th day of September,2022 for the BCRWWS East WWTP Tertiary
Filters Preliminary Engineering Report(PER)Project in the amount of$506,672.00; and
WHEREAS,the City and Engineer executed Supplemental Contract No. 1 on September 14,2023
to amend the scope of services and to increase the compensation by $788,073.00 to a total of
$1,294,745.00;and
WHEREAS,the City and Engineer executed Supplemental Contract No. 2 on January 19, 2024
to amend the scope of services and to increase the compensation by$40,463.50 to a total of
$1,335,208.50;and
WHEREAS, the City and Engineer executed Supplemental Contract No. 3 on July 25, 2024 to
amend the scope of services and to increase the compensation by $561,302.00 to a total of
$1,896,510.50;and
WHEREAS,the City and Engineer executed Supplemental Contract No.4 on October 9,2025,to
amend the scope of services and to increase the compensation by $137,569.00 to a total of
$2,034,079.50;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 $64,770.00 to a total of$2,098,849.50;
NOW THEREFORE,premises considered. the City and the Engineer agree that said Contract is
amended as follows:
Supplemental Contract Rev.06/16
0199.202236 C (
M— 20,, /(D 84275
1
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
$64,770.00 the maximum amount payable under the Contract for a total of $2,098,849.50, 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 Rev.06/16
0199.202236 84275
2
PLUMMER AND ASSOCIATES, INC.
By: Stephen J Coo/aipr 22,2026 14 29:23 CDT)
Printed Name: Stephen J Coonan
Title:
Date Signed:
•
Supplemental Contract Rev.06/16
0199.202236 84275
3
CITY OF ROUND ROCK APPROVED AS TO FORM:
By: Brooks Bennet(May 6,2026 19:00:26 CDT) ,��.�� • 'x!cit =�7
Stephanie L. Sandre, City Attorney
Printed Name: Brooks Bennett
Title: rooks l2 n ne t
Date Signed: " LA.y I) 2O2f0
Supplemental Contract Rev.06/16
0199.202236 84275
4
ADDENDUM TO EXHIBIT A
CITY SERVICES
CITY OF ROUND ROCK
BRUSHY CREEK REGIONAL WASTEWATER SYSTEM EAST PLANT—TERTIARY FILTERS
CONSTRUCTION PHASE SERVICES SUPPLEMENTAL#2
Per the scope of work documented in Exhibit B-Engineering Service,the City of Round Rock
(CITY) responsibilities will include the following:
• Continue to provide Plummer&Associates with requested information as needed, including,
but not limited to as-built plans and specifications, previous Geotechnical reports, previous
studies, record drawings, operational data, etc.
• Provide Plummer with access to the CITY's facilities as needed to complete the work.
• Review materials submitted by Plummer related to the project and provide comments back as
requested.
• Arrange for and coordinate regular meetings of the Project Partners for the review of
information provided and to receive comments.
• Manage material testing contractor UES Professional Solutions and provide any results back to
Engineer in a timely manner.
• Pay all State and local fees associated with the Tertiary Filters Project.
• Provide assistance to the on-site personnel provided by consultants under this project as
needed.
• Obtain appropriate signatures on paperwork,including those from co-permittees as needed.
Page I 1
ADDENDUM TO EXHIBIT B
ENGINEERING SERVICES
This Exhibit is part of the Agreement between Plummer Associates, Inc. (Plummer) (the"Engineer")and
the City of Round Rock (the "Owner")for the project generally described as:
Brushy Creek Regional Wastewater Treatment System East Plant(BCE)Tertiary Filters Construction
Phase Services
INTRODUCTION
Due to continued delays in construction, primarily associated with completion of the electrical and
controls scope of work,the project schedule has been extended beyond the previously anticipated
completion of January 2026. The current contractor schedule indicates substantial completion in May
2026. Electrical installation, controls integration, and startup activities are now on the critical path and
are driving project completion. This scope covers continued support and coordination with the City,
Contractor, and stakeholders during the construction phase, excluding services already budgeted under
SCADA integration tasks.SC#3 and SC#4 covered 205 submittals(current total to date is 214)and 75 RFIs
(current total to date is 81).
Budgeted hours and fees for SCADA Integration are not impacted and will be funded by the existing
authorization. Engineering services originally budgeted for post-construction activities(including startup
support, O&M manual development, and record drawings) have been partially utilized to support
ongoing construction administration efforts through February and March 2026. As a result, additional
authorization is required to-
1. continue construction phase services through project completion and
2. replenish the remaining post-construction services necessary to support startup,commissioning,
and project closeout.
1 ENGINEERING SERVICES DURING CONSTRUCTION
1.1 CONSTRUCTION PROGRESS MEETINGS
Engineer will attend and facilitate up to four(4)additional monthly 1-hour construction progress
meetings between February and May 2026. It is assumed that the Project Manager,one engineer,
and one engineer-in-training may attend each construction progress meeting from the Engineer's
team.The Engineer will facilitate, prepare agenda,and distribute meeting minutes for all progress
meetings. Progress meeting agendas will include RFI and submittal logs. The Contractor is
responsible for providing schedule updates, 3-week lookahead schedule, review progress since
the last meeting. The Contractor will also inform whether each activity is on time, ahead of
schedule, or behind schedule with respect to the construction schedule.
1.2 SITE VISITS
Engineer will conduct up to four(4) additional monthly site visits to observe construction
progress,review conformance with design intent,and identify any quality or coordination issues.
Page 12
Each visit will include a brief field report with photos and observations. Special attention will be
given to canopy erection,equipment placement,electrical installations,and tertiary filters startup
readiness.
1.3 DOCUMENT REVIEW
Engineer will provide ongoing review and response for the following additional items anticipated
due to the extended construction:
• Review of up to twenty-five(25)additional submittals and resubmittals(including
pending O&M reviews)
• Response to up to ten (10)additional Requests for Information (RFIs)—formal or
informal
Reviews will be conducted for conformance with the contract documents and alignment with the
design intent. Reviews exceeding the quantities listed above will be considered additional
services.
1.4 CHANGE ORDERS
The Engineer will provide technical review and documentation for:
• Up to two(2)additional contractor-initiated change order proposals
• Up to five(5)additional clarifications or field orders
This scope includes evaluating the merit and technical basis of proposed changes, preparing
supporting documentation, and assisting with coordination and implementation.The Engineer
will work closely with the City to maintain project continuity and effectively address field-driven
modifications. Requests exceeding these quantities will be considered additional services.
2 POST-CONSTRUCTION SERVICES
2.1 START-UP SERVICES
Review a pre-start-up training schedule and start-up schedule for the Tertiary Filters submitted by
the Contractor.
2.2 RECORD DRAWINGS
2.2.1 The Owners representative will revise the construction drawings in accordance with the
information furnished by the construction contractor reflecting changes to the project made
during construction. Record drawings are defined as the drawings produced by the Engineer's
modifications to the original design drawings to reflect the changes during the construction.
2.2.2 The Engineer will prepare record drawings, in part, based on information compiled and furnished
by others, and may not always represent the exact location,type of various components, or exact
manner in which the project was finally constructed.
Page 13
2.2.3 The Engineer is not responsible for any errors or omissions in the information from others that
are incorporated into the record drawings.
2.2.4 Record drawings for the project will be issued by the Engineer within sixty(60)days after the final
comments and markups are provided by the construction contractor and the City.
2.2.5 The Engineer will provide the City with one (1) digital copy in Bluebeam PDF via SharePoint.
Engineer will request that the Contractor furnish a red-lined original or copy of the as-builts used
to prepare the record drawings. Engineering record drawings shall also be furnished to the City in
AutoCAD format.
2.3 O&M MANUAL
Prepare an Operation and Maintenance (O&M) manual for the BCE Tertiary Filters. Deliver O&M
manuals in electronic and bound formats. The O&M manual will address all process facilities
constructed under this Agreement.The electronic O&M manual will feature text,photographs,PDF
drawings, and an image photograph directory. Operating in a computer environment, the system
will provide access to all equipment O&M manual data. This specifically includes computerization
of O&M manual text,drawings, process schematics, related photographs,and creation of an image
photograph directory with letter-sized image pages of scanned images addressing facilities
constructed under this Agreement. The information will be manipulated electronically to create a
multimedia document complete with hyperlinks, photographs, drawings, and scanned image
viewing capabilities. Concurrent with the production of the O&M manual in electronic format, initial
and final drafts will be delivered to the City for review and comment. Along with delivery of the
final draft O&M manual, one half-day of training will be provided to familiarize plant staff in use
and maintenance of the electronic O&M manual. The Engineer will deliver draft copies for review
and comment by the City. Upon receipt of the City's comments,three(3)final bound copies and an
electronic version shall be delivered.
3 PROJECT MANAGEMENT AND QUALITY CONTROL
The Engineer will maintain oversight and coordination responsibilities throughout the extended
construction period. Activities will include:
• Updating action items,and track construction progress.
• Issuing monthly progress updates summarizing task completion,outstanding issues,and
budget status.
• Facilitating coordination among design,construction,and quality control teams to
ensure timely resolution of technical issues and submittal reviews.
ASSUMPTIONS:
I. CONTRACTOR REQUESTS
Investigations, analyses, studies, or design for substitutions of equipment or materials,
corrections of defective or deficient work of the contractor or other deviations from the
construction contract documents requested by the contractor and approved by the City are
additional services.
Page 14
II. ADDITIONAL ENGINEERING REVIEWS
The fee is based on the Submittal Reviews, RFIs,and CMRs listed above. If additional reviews are
necessary, due to incomplete submittals, or multiple review iterations, and if the RFIs and
requested changes are beyond the estimated amounts, such that the combined budgeted fee
for these items is exceeded,this will be considered an additional service.The substitution of
materials or equipment or design modifications requested by the City are an additional service.
III. QUALITY ASSURANCE TASKS FOR SERVICES NOT LISTED
Engineer will NOT provide Quality Assurance tasks associated with geotechnical,special
inspections and additional survey services.
Page 15
ADDENDUM TO EXHIBIT C
Work Schedule
Attached Behind This Page
Brushy Creek WWTP Tertiary Filter Keeley Construction Group, Inc.
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ADDENDUM TO EXHIBIT D
Fee Schedule
Attached Behind This Page
k Exhibit D-Fee Schedule Project Number:0982-011-01
PLUMMER Date: 4/20/2026
CONSTRUCTION PHASE SERVICES-SUPPLEMENTAL Version: 3
Project Project Sr.Electrical Plummer
Manager Engineer EIT CAD Engineer Labor Plummer Fee KFA Fee FNI Fee Subs Total Total
(hrs) (hrs) (hrs) (hrs) (hrs) (hrs) ($) ($) (5) $ (5)
CONSTRUCTION ADMIN.SERVICES 63 73 112 0 48 296.00
1 Engineering Services During Construction 38 48 112 0 48` 246 $ 53,020 $ - $ 53,020.00
1.1 Construction Meetings 10 10 10 30 $ 6,250 $ - $ 6,250.00
—
1.2 El&C Filter Integration Services
1.3 Site Visits 4 4 4 4 16 $ 3,800 $ - _$ 3,800.00
1.4 Quality Assurance 4 4 4 4_ 16 $ 3,800 $ - _$ 3,800.00
1.5 Document Review _ _
1.5.1 Submittal Review 5 5 59 20 89 $ 17,995 $ - $ 17,995.00
1.5.2 Substitutions Review _ $ - —$ -
1.5.3 RFI Review 10 20 30 15 75 $ 16,425 $ - $ 16,425.00
1.6 Change Orders&Rejection of Work 5 5 5 5 20 $ 4,750 $ - $ 4,750.00
1.7 Substantial and Final Completion Review
2 Post Construction Services 15 30 50 20 0_ 115 $ 21,800 $ - $ 21,800.00
2.1 Start-Up Services 5 10 10 $ 5,000 $ - —$ 5,000.00
2.2 Record Drawings 5 10 20 20 _ $ 10,250 $ - —$ 10,250.00
2.3 O&M Manual 5 10 20 $ 6,550 $ - _$ 6,550.00
3 Project Management and Quality Control 25 25 0 0 0_ 50 $ 11,750 $ - —$ 11,750.00
3.1 Project Management Activities 20 20 — 40 $ 9,400 $ - _$ 9,400.00
3.2 QC Reviews _ _$ -
3.3 Coordination with Pre-Procured Equipment Vendor _ _ $ -
3.4 Meetings with City Management 5 5 10 $ 2,350 $ - $ 2,350.00
TOTAL CONSTRUCTION 63 73 112 0 48 296 $ 64,770 $ - $ - $ - $ 64,770.00
Previously Authorized Fee — $ 2,034,079.50
Updated Contract Total $ 2,098,849.50
1 of 1
https://apaienv.sharepoint.com/sites/0982-011-01-Internal/Shared Documents/Internal/01 Contracts/1-1 Client/Construction Admin Amendment 82/Working Files_SSM/Construction Admin Supplemental Worksheet_Plummer 4/20/2026