CM-12-12-262DM" ti Z'2VECEIVED
DEC 132012
ROUND ROCK, TEXAS City Manager Approval Form
PURPOSE PASSION PROSPERITY
Consider executing Supplemental Contract No. 2 with Atkins North Americas, Inc. for the Creek Bend Boulevard Project.
Item Caption:
Approval Date:
December 14, 2012
Department Name: Transportation Department
Project Manager: Leah Coffman
Assigned Attorney: Steve Sheets
Item Summary:
The Creek Bend Boulevard Extension project extends Creek Bend Boulevard from Creek Bend Circle to Wyoming Springs Drive
and will provide a much needed creek crossing west of IH35. The proposed project was first approved by the City in 1999 as part
of the Transportation Master Plan and was approved for funding in the 2001 bond election. The project has languished due to
numerous obstacles and delays. The original engineering contract with Atkins North America, Inc. in the amount of $179,898.43
provided for a 30% design schematic.
Supplemental Contract No. 1 consists of preparation of final (100%) Plans, Specifications, and Estimates (PS&E), bidding phase
services, and construction phase services. Final PS&E will be developed from the approved 30% design schematic and will
include supplemental design survey, right-of-way acquisition surveying services, environmental studies, roadway design, bridge
design, water quality design, water line design, pedestrian/sidewalk improvements and utility relocations. The cost of
Supplemental Contract No. 1 was $805,808.42.
Supplemental Contract No. 2, at a cost of $21,570.57, amends the agreement to include additional services to study and define
limits of the void encountered during geotechnical drilling. The total cost of the engineering contract would be $1,007,277.42.
No. of Originals Submitted: Two
Project Name: Creek Bend Boulevard Project
Cost: $21,570.57
Source of Funds: RR Trans Dev Corp Construction
Source of Funds (if applicable): Select Source Fund
Account Number:
Finance Director Approval: LO for C. Delaney
Date: 12-12-12
Department Director Approval: Gary Hudder Date: 12-10-12
CIP o Budget o n Purchasing n n Accounting n n
N/A OK N/A OK N/A OK N/A OK
ITEMS WILL NOT BE PLACED ON THE COUNCIL OR CM AGENDA W/OUT PRIOR FINANCE AND/OR LEGAL APPROVAL
REV. 6/20/11
STATE OF TEXAS
COUNTY OF WILLIAMSON
§
§
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SUPPLEMENTAL CONTRACT NO. 2
TO CONTRACT FOR ENGINEERING SERVICES
FIRM: ATKINS NORTH AMERICA, INC. ("Engineer")
ADDRESS: 6504 Bridge Point Parkway, Suite 200, Austin, TX 78730
PROJECT: Creek Bend Boulevard
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 Atkins North America, Inc.,
hereinafter called the "Engineer".
WHEREAS, the City and Engineer executed a Contract for Engineering Services, hereinafter
called the "Contract", on the 26th day of January, 2012 for the Creek Bend Boulevard Project in
the amount of $179,898.43; and
WHEREAS, the City and Engineer executed Supplemental Contract No. 1 on July 12, 2012 to
amend the scope of services and to increase the compensation by $805,808.42 to a total of
$985,706.85; 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 $21,570.57 to a total of $1,007,277.42;
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
$21,570.57 the lump sum amount payable under the Contract for a total of $1,007,277.42, 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.12/01/08
0199.7202; 00263626 84275
ST33CBDR
1
ciAk-
ATKINS NORT AME ' , INC.
By:
Date
CITY OF t I UND RO K
By:
54 -eve.
l
Date
AP 'RIVED AS TO ORM:
,.1 L.
Stepha
L. Sheets, City Attorney
Supplemental Contract Rev.12/01/08
0199.7202; 00263626 84275
ST33CBDR
2
ADDENDUM TO EXHBIT B
Engineering Services
PROJECT DESCRIPTION
This Supplemental Contract consists of a Pedestrian Karst Survey, Contract Geophysical Study
and Oversee the Geophysical Study associated with Geotechnical Boring P-4. According to a
recent Fugra Consulants, Inc. drilling log (10/23/12) for geotechnical boring P-4, void space was
encountered from approximately 4 feet (ft) to 12.9 ft below surface grade. The proposed scope of
this investigation shall include a surface pedestrian survey (Phase I karst survey), geophysical
study within a 150 feet radius of the subject boring to further characterize the subsurface void
space encountered within the subject boring and oversight/review by Atkins of the geophysical
study.
TASK 1: SURVEYING — Not Included with this Supplemental
TASK 2: ROUTE STUDY — Not Included with this Supplemental
TASK 3: ENVIRONMENTAL STUDIES
1. A karst feature survey will be conducted to determine the presence of naturally occur ing
features which may provide point recharge to the Edwards Aquifer, habitat for federally
listed endangered karst invertebrates, or structural concerns to the project. Karst survey
tasks to be completed are described below.
• Background Geology - Published geologic reports will be reviewed and the
information used to establish the geologic conditions beneath the project site.
Primary sources of information will be geological reports published by the Bureau of
Economic Geology and U.S. Geological Survey. Other sources including fault and
lineament maps and topographic maps will also be reviewed as available. Relevant
cave -related publications including published cave surveys will be reviewed for any
known features within a 1 -kilometer (km) radius of the site.
• Aerial Photography Examination — Aerial photography of the project and surrounding
areas will be examined for evidence of fractures, lineaments, sinkholes, lithologic
contacts, and other potentially relevant karst features.
• Field Survey - Atkins will conduct a walking survey of the project area to locate and
describe karst features. The survey will be conducted along narrow transects
(approximately 12 -foot spacing), unless site conditions require even more closely
spaced transects. The survey will be conducted by a qualified geologist meeting
Texas Commission of Environmental Quality (TCEQ) criteria for a karst geologist
and a senior project manager with extensive karst experience, both of which are
permitted by the U.S. Fish and Wildlife Service (FWS) to sample endangered karst
Page 1 of 3
invertebrates. Natural karst features will be marked with flagging, photographed,
described, and their positions will be determined using a handheld GPS instrument.
If a karst feature exhibits conditions that appear to be conducive to provide suitable
habitat for karst invertebrates the circumstances will be discussed with the client prior
to any further investigation such as biotic sampling. If additional investigation is
warranted such as biotic sampling that would be performed by two ecologists
permitted by FWS to perform such biological collections per FWS protocols. The
biological collections would be performed under a different scope of work (Phase IT
karst survey).
• Report Preparation - Karst feature survey findings will include a description of each
feature including the dimensions, type, trend, geologic characteristics, and a map
illustrating the approximate location of each feature and recommendations for a Phase
II karst survey of features requiring excavation and/or biological collection.
2. Following the Phase I karst survey, Round Rock Geophysics, LLC (RRGeo) would
conduct a geophysical study at boring P-4 within a 150 feet radius. The objective of this
study is to evaluate the structural development and subgrade extent of boring P-4 and in
addition, any identified karst features from the karst survey via a noninvasive technique
that retains the biological integrity of the subsurface voids. The proposed geophysical
method is called seismic refraction tomography, which uses compressional wave (P-
wave) and shear wave (S -wave) travel time measurements, thereby creating 2D and 3D
images of the subsurface velocity structure.
Data will be collected along four lines oriented along the diameter of the area of boring
P-4 intersecting at the identified void as a common point. Each line will have a survey
length of approximately 135 -foot. There will be a total of 7 shot points per line and a
geophone spacing of 5 -foot. A land streamer with 8 -Hz vertical geophones will be used
to collect data. A minimum depth of exploration of 35-40 foot is planned.
The field data will be downloaded and processed using industry standard software
packages. The RREG report will include:
• Description of the data acquisition procedures
• Equipments and software used for data collection
• Data quality and site condition
• Data processing procedures
• Results of data processing (2D and 3D displays)
• Interpretation of the final results in terms of characterizing the void and associated
features,
• Conclusion and recommendation
• Final site visit would be planned to mark the horizontal dimensions of the void on the
surface.
Page 2 of 3
Atkins will coordinate the planning and be present during the entire geophysical study.
TASK 4: PRELIMINARY DESIGN/30% PLANS — Not Included with this Supplemental
TASK 5: PROJECT MANAGEMENT — Not Included with this Supplemental
TASK 6: DIRECT EXPENSES
1. Tree and brush removal
TASK 7: WATER IMPROVEMENTS — Not Included with this Supplemental
TASK 8: UTILITY LOCATIONS/LAYOUTS — Not Included with this Supplemental
TASK 9: GEOTECHNICAL DESIGN -- Not Included with this Supplemental
TASK 10: 60% PLANS — Not Included with this Supplemental
TASK 11: 95% PLANS — Not Included with this Supplemental
TASK 12: 100% PLANS/FINAL SUBMITTAL — Not Included with this Supplemental
NOT INCLUDED WITHIIN THIS SCOPE
The following items are not included with this scope. These items, if necessary, would be added
to the scope through a supplemental agreement.
1. Subsurface void(s) entry and exploration, biological surveys, and/or surveying and
mapping.
2. Coordination with any state or federal agency.
DELIVERABLES
1. Phase I Karst Survey
2. Geophysical Study Report
Page 3 of 3
ADDENDUM TO EXHIBIT C
Work Schedule
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