CM-2019-0061 - 3/1/2019STATE OF TEXAS §
COUNTY OF WILLIAMSON §
SUPPLEMENTAL CONTRACT NO. 1
TO CONTRACT FOR ENGINEERING SERVICES
FIRM: HALFF ASSOCIATES, INC. ("Engineer")
ADDRESS: 9500 Amber len Boulevard Buildine F Suite 125 Austin TX 78729
PROJECT: Lisa Rae Street 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 Halff Associates, Inc.,
hereinafter called the "Engineer".
WHEREAS, the City and Engineer executed a Contract for Engineering Services, hereinafter
called the "Contract", on the 24th day of May, 2018 for the Lisa Rae Street Improvements
Project in the amount of $110,825.00; 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 $4,865.00 to a total of $115,690.00;
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.
II.
Article 4, Compensation and Exhibit D. Fee Schedule shall be amended by increasing by
$4,865.00 the maximum amount payable under the Contract for a total of $115,690.00, 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 Rcv,06/16
n , 2019
��C/`^G r 84275
HALFF AS' CIATES, INC.
By:
ill..
Date
Supplcmemal Contract Rcv.06;' 16
0199.1817.00418978 84275
CITY OF ROUND ROCK APPIAOIkED AS TO ORM:
l
By:
v0� CS�CVi y Mana er Stephan L. Sheets, City Attorney
Date
Supplemental Contract Rev.06/16
0199.1817;00418978 84275
ADDENDUM TO EXHIBIT B
Engineering Services
TASK 4 — Additional Design for Drainage
An existing 24" storm drain stub -out in the center of Lisa Rae St. was discovered by the
contractor during installation of the project wastewater line. In the interest of public
safety and since there is access to the existing storm drain system within the project
limits, the City of Round Rock desires like to collect runoff from the new pavement on
Lisa Rae and route it to the City's drainage system under Double Creek Dr. Upon the
previous direction by the City, the original design for the Lisa Rae St. project did not
analyze storm runoff and called for ribbon curb to maintain surface drainage. On
February 13, 2019, City staff, the project contractor, and project engineer met onsite to
discuss options for the underground storm system. The City requested Halff analyze and
design a storm system based on the limits of the proposed Lisa Rae project. The
request from the City of Round Rock will require the following additional tasks be
performed:
(a) Halff will review available previous designs for the storm system in
Double Creek Dr and the detention pond at the fire station to determine
remaining capacity in the existing 24" RCP stub -out. Drainage basin
information that is not available will be assumed based on LiDAR
topographical information for the area. Austin Engineering, Inc. (AEI) will
provide field survey information to confirm the flow lines and slope of the
existing 24" RCP.
(b) Engineer shall calculate the resultant runoff from the Lisa Rae St. project
improvements per the City of Round Rock drainage criteria. The
generated storm flow will be used to size the pipe for connection to the
existing 24" RCP and to size the curb inlet. Engineer will create a new
plan sheet showing these improvements, provide necessary details, and
revise existing plan sheets to eliminate conflicting information.
(c) Based on unit prices provided by the contractor, Engineer will provide a
cost estimate for the additional work.
ADDENDUM TO EXHIBIT D
Fee Schedule
Compensation for the Supplemental services shall be paid by the CITY OF ROUND ROCK to
the ENGINEER for all services required for work in accordance with the previously executed
Lisa Rae Street Improvements agreement dated 5124/2018.
PHASE 5.0 — CONSTRUCTION PHASE SERVICES
TASK 4 — Additional Design for Drainage $ 4,865.00
TOTAL OF SUPPLEMENT #1 DESIGN SERVICES LUMP SUM TASKS $4,865.00
City of Round Rock
{ TEXAS Agenda Item Summary
Agenda Number:
Title: Consider executing Supplemental Contract No. 1 with Halff Associates, Inc.
for the Lisa Rae Street Improvements Project.
Type: City Manager Item
Governing Body: City Manager Approval
Agenda Date: 3/1/2019
Dept Director: Michael Thane, Director of Utilities and Environmental Services
Cost: $4,865.00
Indexes: General Self -Financed Construction
Attachments: L4F, Supplemental No. 1
Department: Utilities and Environmental Services
Text of Legislative File CM -2019-0061
This agenda item is for the approval of Supplemental Contract No.1 with Halff Associates for
additional engineering services for the Lisa Rae Street Improvement project.
In 1984, Lisa Rae Drive, Joyce Lane, and Ray Berglund Boulevard were involuntary annexed
into the City of Round Rock. In the early 2000's, bonds were passed to perform improvements
on these three streets; however, during construction funding ran short and only Joyce Lane and
Ray Berglund Boulevard were constructed. Per the annexation agreement, Lisa Rae Drive
remained a private drive.
In October 2012, residents along Lisa Rae Drive approached the City concerning maintenance
to Lisa Rae Drive. Residents asked the City if a maintenance agreement could be entered into
in order to construct a new street similar to Ray Berglund Boulevard and Joyce Lane. The city
determined that the construction of a new street could only be possible if all property owners
donated the required Right -of -Way (ROW) needed to construct Lisa Rae Drive. After several
discussions with the six residents along Lisa Rae Drive, they all agreed to donate the required
25 -feet of property for the necessary ROW. On May 11, 2018, the City executed the documents
needed to acquire the donated ROW necessary to construct Lisa Rae Drive.
The Lisa Rae Street Improvements project consists of approximately 700 linear feet of new
20 -foot wide asphalt pavement with ribbon curb; approximately 500 linear feet of new 8 -inch
water line; and approximately 1,000 linear feet of new 8 -inch wastewater line.
Clfy of Round Rock Page 1 Primed an 2/28/2019