CM-2020-085 - 3/20/2020STATE OF TEXAS §
COUNTY OF WILLIAMSON §
SUPPLEMENTAL CONTRACT NO.2
TO CONTRACT FOR ENGINEERING SERVICES
FIRM: HALFF ASSOCIATES, INC. ("Engineer")
ADDRESS: 9500 Amberglen Boulevard, Building F, Suite 125, Austin, TX 78729
PROJECT: Chisholm Valley Storm Drain Improvements — Area 3
This Supplemental Contract No. 2 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 llth day of July, 2019 for the Chisholm Valley Storm Drain
Improvements — Area 3 Project in the amount of $131,535.00; and
WHEREAS, the City and Engineer executed Supplemental Contract No. 1 on the 7th day of
February, 2020 to modify the provisions for the scope of services and to increase the
compensation by $17,005.00 to a total of $148,540.00; 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 $41,360.00 to a total of $189,900.00;
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. Exhibit C, Work Schedule shall be amended as set
forth in the attached Addendum to Exhibit C.
II.
Article 4, Compensation and Exhibit D, Fee Schedule shall be amended by increasing by
$41,360.00 the maximum amount payable under the Contract for a total of $189,900.00, as
shown by the attached Addendum to Exhibit D.
IN WITNESS WHEREOF, the City and the Engineer have executed this Supplemental
Contract in duplicate.
Supplemental Contract Rev.06/16
�� 8; Lz� �l_JF j 84275
HALFF ASSOCIATES, INC.
1
Supplemental Contract Rev.06/16
0199.1928; 00441571 84275
CITY OF ROUND ROCK 4Stepha
AS TO ORM:
By:
Laurie Hadley, 1<ty Manag Sheets, City Attorney
Date
Supplemental Contract Rev.06116
0199.1928;00441571 84275
City of Round Rock Chisholm Valley Drainage Assessment
Contract for Engineering Services
ADDENDUM TO EXHIBIT B
Engineering Services
Chisholm Valley Drainage Assessment Proiect
Study Area 3 - Flood Mitigation Design
Suilnlemental #2
1. PROJECT PURPOSE
The purpose of this supplemental to the Chisholm Valley Drainage Assessment Project — Study
Area 3 is for additional services to provide utility improvements within Study Area 3 and
refinement to the 2D model around Bluebonnet Elementary School. The utility improvements will
consist of water and sewer improvements on Chisholm Valley Drive, Round Up Trail and
Sagebrush Drive. Additionally, these utility improvements will include new service connections
to replace service connections within in the limits of storm drain improvements. In addition to the
utility improvements, there will be 2D model refinements for Bluebonnet Elementary School
adjacent to Study Area 1 to identify potential improvements to reduce flooding and provide basis
for a future Capital Improvements Project for the City of Round Rock.
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Figure 1. Study Area 3 Project Limits
I
City of Round Rock
Contract for Engineering Services
2. SCOPE OF WORK
Chisholm Valley Drainage Assessment
The scope of work for the services to be provided under this additional work effort request
includes the following tasks:
Chisholm Valley —Stud Area 3 Flood Mitigation Design
• Task 4: 60% Design Phase Submittal
• Task 5: 100% Design Phase Submittal
• Task 6: QA/QC Review
• Task 7: Bluebonnet Elementary 21) Analysis
Task 1: Project Management
• No additional effort requested.
Task 2: Site Data Acquisition
2.1 Site Visit
• No additional effort requested.
2.2 Topog_raphic Survey
• No additional effort requested.
2.3 Subsurface Utility Investi ag tion
• No additional effort requested.
2.4 Environmental Desktop Assessment
• No additional effort requested.
Task 3: Preliminary Engineering Design (30%)
• No additional effort requested.
Task 4: 60% Design Phase Submittal
Upon the City's Notice to Proceed, Halff will proceed with 60% design efforts. The work product
will prepare design plans to include proposed water and sewer utility lines and opinions of probable
cost associated with the proposed utility improvements.
Prepare/Revise 11"x17" 60% design plans sheets that may include the following:
o Cover sheet
o General notes
o Access plan
o Dimension control
o Erosion control plan
o Demolition plan
o Storm drain plan and profile sheets
o Drainage areas
o Storm drain hydraulic calculations
o Drainage details
o Traffic control sheets
2
City of Round Rock Chisholm Valley Drainage Assessment
Contract for Engineering Services
• Prepare additional 11"xl7" 60% design plan sheets that may include:
o Utility General Notes
o Utility Plan and Profile Sheets
■ Chisholm Valley Drive
■ Round Up Trail
■ Sagebrush Drive
o Utility Details
o Pavement Typical Sections
• Attend one Webex design meeting to discuss the 60% engineering design with City
staff.
• Prepare engineer's opinion of probable cost utilizing City provided unit costs.
• Submit a list of specification items and anticipated specification sources. Discuss the
need for any special provisions or modifications to standard specifications.
• Address City 60% review comments.
Task 5: 100% Design Phase Submittal
Upon the City's formal approval of the 60% Preliminary Engineering Design, Halff will proceed with
100% design efforts. The work product will require the refinement of the utility design including
design plans and opinions of probable cost associated with the proposed improvements.
• Prepare 11"x17" 100% design plans based on the list of sheets listed in Task 4: 60%
Design Phase Submittal.
• Attend one design meeting to discuss the 100% engineering design with City staff.
• Prepare engineer's opinion of probable cost utilizing City provided unit costs.
• Submit specifications.
• Address City 100% review comments.
Task 6: OA/OC Review
To ensure that the final product satisfies the TPWD, Engineer shall implement its company
prescribed procedures for quality assurance and quality control. At the completion of each Task
and prior to the submittal to the City, Halff will have the technical memo and design plan sheets
reviewed by a designated Quality Assurance Manager (QAM). For this project, the QAM will be
a professional engineer licensed in the state of Texas with a minimum of 15 years of experience
applicable to dam safety analysis and construction.
The QAM will provide an independent review of each project task. The QC review process will
include a review of calculations, constructability and design. Plans and reports will be reviewed
for accuracy, neatness, uniformity, drafting, errors, omissions, conflicts, spelling, grammar,
completeness and conformance with the contract agreement.
Task 7: Bluebonnet Elementary 2D Analgsis
Upon the City's Notice to Proceed, Halff will proceed with refining the 21) model in the vicinity of
Bluebonnet Elementary School. The work product will consist of refinement of the 21) model and
presentation of findings in a WebEx meeting to the City.
City of Round Rock Chisholm Valley Drainage Assessment
Contract for Engineering Services
• Site Visit
• Review As-builts and add storm drain to 2D model
• Refine 2D Mesh in model for:
o Approximately 1,500 feet of Chisholm Valley Drive
o North side of school including driveway, parking area and playground, and
o Outfall ditch on southeast property line
• Update rainfall for NOAA Atlas Rainfall data in 2D model
• Identify problem areas
• Identify two (2) potential solutions
• Provide findings during a WebEx meeting
This effort will require approximately 2 weeks from Notice to Proceed to presentation of findings.
4
City of Round Rock Chisholm Valley Drainage Assessment
Contract for Engineering Services
ADDENDUM TO EXHIBIT C
Work Schedule
Halff Associated, Inc. (Halff) can commence work on this project within two weeks after notice -to -
proceed is received from the City of Round Rock.
Halff anticipates completing Work Authorization No. 3 within ten (10) months after receiving a
Notice to Proceed (NTP).
• Task 1: Project Management - 10 months
0
• Addendum 2
• Task 4: 60% Design Phase Submittal - 3 months — Revise to 2 months from NTP for
Addendum 2
• Task 5: 100% Design Phase Submittal - 2 months
• Task 6: QA/QC - 10 month
• Task 7: Bluebonnet Elementary School 2D revisions — 2 weeks from NTP for
Addendum 2
City of Round Rock Chisholm Valley Drainage Assessment
Contract for Engineering Services
ADDENDUM TO EXHIBIT D
Fee Schedule
Hourly rates to be billed on a time and materials basis per the following Rate Schedule attached
(behind this page):
*Rates may be amended once between Nov. 1, 2018 and Nov. 1, 2019, not to exceed a 3% increase.
Chisholm Valley Storm Drain Improvements - Area 3
Supplemental Work Authorization #2
Exhibit D
Fee Schedule
Total
Total
Other
TOTALS
Task
Labor Hours
Loaded Labor Cost
Direct Costs
Subconsultants
Task 1: Project Management
0
$0.00
$0.00
$0.00
$0.00
Task 2: Site Data Acquisition
0
$0.00
$0.00
$0.00
$0.00
Task 3: Preliminary Engineering Design (30%)
0
$0.00
$0.00
$0.00
$0.00
Task 4: 60% Design Phase Submittal
119
$17,980.00
$0.00
$0.00
$17,980.00
Task 5: 100 % Design Phase Submittal
97
$14,860.00
$0.00
$0.00
$14,860.00
Task 6: QA/QC
20
$4,000.00
$0.00
$0.00
$4,000.00
Task 7: Bluebonnet School
33
$4,520.00
$0.00
$0.00
$4,520.00
SUPPLEMENTAL NO.2 TOTAL:
269
$ 41,360.00
0
0
$ 41,360.00
SUPPLEMENTAL NO.1 TOTAL:
117
$ 17,005.00
0
0
$ 17,005.00
ORIGINAL CONTRACT TOTAL:
850
$ 129,360.00
2,175
0
$ 131,535.00
REVISED CONTRACT TOTAL:
1,505
$ 187,725.00
2,175
0
$ 189,900.00
Chisholm Valley Storm Drain Improvements - Area 3
SUPPLEMENTAL WORK AUTHORIZATION #2
Fee Summary Details
1. Halff Associates' Direct Labor:
Project Manager
Senior Engineer (Eng. V)
Mid Engineer (Eng. IV)
Jr Engineer (Eng. III)
Jr Environmental Scientist
Survey/SUE Crew
Survey/SUE Technician
RPLS
Clerical
Expenses (ODC)
8.0
Hrs. @
$230.00
/Hr.=
$
1,840
45.0
Hrs. @
$200.00
/Hr.=
$
9,000
70.0
Hrs. @
$160.00
/Hr.=
$
11,200
120.0
Hrs. @
$135.00
/Hr.=
$
16,200
26.0
Hrs. @
$120.00
/Hr.=
$
3,120
0.0
Hrs. @
$155.00
/Hr.=
$
-
0.0
Hrs. @
$95.00
/Hr.=
$
-
0.0
Hrs. @
$175.00
/Hr.=
$
-
0.0
Hrs. @
$80.00
/Hr.=
$
-
Total 269.0
Total = $ 41,360
Total = $0.00
Assignment Amount = $ 41,360
City of Round Rock
y
ROUND ROCK
TEXAS Agenda Item Summary
Agenda Number:
Title: Consider executing Supplemental Contract No. 2 with Halff Associates, Inc.
for the Chisholm Valley Storm Drain Improvements- Area 3 Project
Type: City Manager Item
Governing Body: City Manager Approval
Agenda Date: 3/20/2020
Dept Director: Michael Thane, Director of Utilities and Environmental Services Department
Cost: $41,360.00
Indexes: Self -Financed Water Construction; Self -Financed Wastewater Construction
Attachments: AGMT, Map
Department: Utilities and Environmental Services
Text of Legislative File CM-2020-085
The City previously entered into an Engineering Services Contract with Halff Associates, Inc. for
the design of a new proposed storm drain systems for the Chisholm Valley Area 3 Section. This
area has a history of local drainage issues and flooding as identified by residents, property
owners, and City staff.
During the 30% design of the proposed storm drain system, it was discovered that the new
storm drain system will have some conflicts with the existing water and wastewater systems.
Some segments of water and wastewater lines will need to be replaced along with the existing
services. The City's Utility Department conducted an assessment of these existing water and
wastewater lines during this 30% design time period and found out that the lines are at the end
of their service life and will need to be replaced soon. It was decided to add the replacement of
these existing water and wastewater lines to this project and incorporate the design into the
current contract.
Supplemental No. 2 is to provide additional funding required for the design of the new water
and wastewater lines that will replace the old lines. A new wastewater line and services along
with new waterline services will be installed with this project.
The current Engineering Services Contract provided for a maximum payment of
$148,540. This Supplement No. 2 is for $41,360 and will increase the contract to a maximum
of $189, 900.
City of Round Rock Page 1 Printed on 312312020
Agenda Item Summary Continued (CM-2020-085)
Cost: $41,360
Source of Funds: Self -Financed Water Construction, Self -Financed Wastewater
Construction
City of Round Rock Page 2 Printed on 312312020