CM-2023-035 - 2/24/2023STATE OF TEXAS §
COUNTY OF WILLIAMSON §
SUPPLEMENTAL CONTRACT NO. 1
TO CONTRACT FOR ENGINEERING SERVICES
FIRM: LJA Engineering, Inc. ("Engineer")
ADDRESS: 7500 Rialto Boulevard, Austin, TX 78735
PROJECT: Round Rock West — Greenbelt Channel and Waterline Improvements
This Supplemental Contract No. 1 to Contract for Engineering Services is made by and between
the City of Round Rock, Texas, hereinafter called the "City" and LJA Engineering, 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 October, 2020 for the Round Rock West — Greenbelt
Channel and Waterline Improvements Project in the amount of $124,636.00; 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 $30,347.85 to a total of $154,983.85;
NOW THEREFORE, premises considered, the City and the Engineer agree that said Contract
is amended as follows:
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.
Article 4, Compensation and Exhibit D, Fee Schedule shall be amended by increasing by
$30,347.85 the maximum amount payable under the Contract for a total of $154,983.85, 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]
M-2-D2-3-em57
Supplemental Contract
0199 202035; 4874-96314958
Rev.Q6'A 6
84275
LJA ENGINEERING, INC.
By:
Kenneth G. (chrock
2/7/2023
Date
Supplemental Contract Rev.06116
0199.202035,4874-96314958 84275
CITY OF ROUND ROCK
By:)
r ,(City Manager
&fw I - �•
v'�-a4--
Date
Supplemental Contract
0199.202035, 4874-96314958
VEDAS O FORM:
Steph LSandre, City Attorney
Rev.06r16
84275
City of Round Rock GRRW Greenbelt Channel Grading
Contract for Engineering Services and Water Line Improvements
ADDENDUM TO EXHIBIT B
Engineering Services
Greater Round Rock West Greenbelt Channel Grading and Water Line Replacement
General Work Description:
The purpose of the Greenbelt supplemental is for additional services to update greenbelt channel
design. This includes adding storm drain design, collecting additional survey for new alignments,
updating water alignment and design, and updating environmental documents to account for
current requirements. Also included, is additional effort preparing exhibits and coordinating with
City for Oncor permit.
TASK 1. PROJECT MANAGEMENT
Project schedule has been extended from original contract resulting in additional project
management effort. Task includes the following:
A. Prepare monthly invoices for submission to the City for all requests for payment.
B. Produce Project Scheduling
C. Team meetings (4)
D. QA/QC Models, Exhibits, Calculations, Assumptions
TASK 2. TOPOGRAPHICAL SURVEY
Proposed storm drain and new water line alignments require an additional area of survey
collection along the greenbelt and more detailed survey through Windy Cove and Knollwood
Cove cul-de-sac easements.
City of Round Rock
Contract for Engineering Services
TASK 3. ENVIRONMENTAL STUDIES
GRRW Greenbelt Channel Grading
and Water Line Improvements
3.1 GENERAL WETLAND DETERMINATION
Update to reflect current Section 404 Clean Water Act rules (Rapanos).
3.2 CULTURAL RESOURCES
Update letter and coordinate with Texas Historical Commission to obtain concurrence.
TASK 4. PS&E CHANNEL GRADING
4.1 HYDROLOGY
Update drainage areas for Channel and develop storm sewer drainage areas for new alignment,
calculate times of concentration, determine land use runoff values, and calculate peak flow rates.
All results will be compared to the 2D model created in previous work authorization for
verification purposes.
4.2 HYDRAULICS
The Engineer will update HEC-RAS of the greenbelt channel resulting from the proposed storm
drain trunkline. Inlets and pipes will be placed using Geopak Drainage to determine inflow and
capacity characteristics. No additional deliverables anticipated. Plan sheets will be updated for
proposed improvements.
4.3 WATER QUALITY
The engineer will update the Water Pollution Abatement Plan Exception request and submit to
TCEQ.
TASK 5. PS&E WATER LINE
Water line design will be updated to proposed alignment designation between Lime Rock and
Creekview. No additional deliverables anticipated. Plan sheets will be updated for proposed
improvements.
6. BID PHASE
No additional effort requested.
City of Round Rock
Contract for Engineering Services
GRRW Greenbelt Channel Grading
and Water Line Improvements
ADDENDUM TO EXHIBIT C
Work Schedule
Task
Begin
End
Notice To Proceed
10/28/2020
10/28/2020
Topographical Survey
11/2/2020
12/4/2020
Environmental Studies
11/9/2020
12/18/2020
PS&E
12/4/2020
4/16/2021
50% Submittal
12/4/2020
1/22/2021
50% City Review
1/22/2021
2/5/2021
90% Submittal
1/03/2023
2/10/2023
90% City Review
2/13/2023
2/24/2023
100% Submittal
2/27/2023
3/03/2023
Bid Phase
3/06/2023
4/07/2023
City of Round Rock
Contract for Engineering Services
GRRW Greenbelt Channel Grading
and Water Line Improvements
ADDENDUM TO EXHIBIT D
Fee Schedule
Total
Total
Other
Task
labor Hours
Loaded Labor Cost
Direct Costs
Subconsultants
TOTALS
Task 1: Project Management
24
$4,000,75
$216.00
$0.00
$4,216 75
Task 2: Survey
56
$7,080,00
$0.00
$0.00
$7,080 00
Task 3: Environmental
4
$500.00
$0.00
$0.00
$500.00
Task 4: PS&E Channel Grading
120
$14,800.50
$0.00
$0.00
$14,800 50
Task 5: PS$E Water Line
30
$3,750.60
$0.00
$0.00
$3,750.60
Task 6: Bid Phase
0
$0.00
$0.00
$0.00
$0 00
SUPPLEMENTAL NO.1 TOTAL:
234
$30,131.85
$216.00
$0.00
$30,347.85
ORIGINAL CONTRACT TOTAL:
824
$124,420.00
$216.00
$0.00
$124,636.00
REVISED CONTRACT TOTAL:
1058
$154,551.85
$432.00
$0.00
$154,983.86
PT:ROUNO ROCK
AS
City of Round Rock
Agenda Item Summary
Agenda Number:
Title: Consider executing Supplemental Contract No. 1 with UA Engineering, Inc. for
the Round Rock West - Greenbelt Channel and Waterline Improvements Project.
Type: City Manager Item
Governing Body: City Manager Approval
Agenda Date: 2/24/2023
Dept Director: Michael Thane, Utilities and Environmental Services Director
Cost: $30,347.85
Indexes: Self -Financed Stormwater Construction
Attachments: SC#1 with UA -RRW Greenbelt Grading_partial, Location Map tit
Department: Utilities & Environmental Services
Text of Legislative File CM-2023-035
The City previously entered an Engineering Services Contract with UA Engineering to provide construction
plans and bidding documents for channel and waterline improvements in the Round Rock West Greenbelt
area.
A drainage assessment, previously completed for the Round Rock West neighborhood, identified multiple
habitable structures along the Greenbelt area to be in danger of being flooded. The flood risk came from
the channel adjacent to the properties. The contract scope included a channel design to increase capacity
to alleviate some of the flooding issues.
However, the channel is located near multiple large electrical facilities that require a large clearance area.
To meet these requirements, the design needed to be changed from a channel to a buried storm water
line. This supplemental will add a storm drain design component to the scope.
The original contract amount was $124,636. Supplemental No. 1 will increase the contract amount by
$30,347.85 to a new total contract of $154,983.85 for UA Engineering.
Cost: $30,347.85
Source of Funds: Self -Financed Stormwater Construction
City of Round Rock Page 1 of 2