HomeMy WebLinkAboutContract 39970-A1 (2)AMENDMENT NO. 1
STATE OF TEXAS S CITY SECRETARY CONTRACT NO. q'11D
(No M&C Needed)
COUNTY OF TARRANT S
WHEREAS, the City of Fort Worth (City) and Dunaway
Associates, L.P., (Engineer) made and entered into City Secretary
Contract No. 39970, (the Contract) which was executed
administratively by the City Manager on the 2 day of March 20109
and
WHEREAS, the Contract involves engineering services for the
following project:
Summer Creek Drive, Project No. #00997
WHEREAS, it has become necessary to execute Amendment No. 1
to said Contract to include an increased scope of work and revised
maximum fee;
NOW THEREFORE, City and Engineer, acting herein by and
through their duly authorized representatives, enter into the
following agreement which amends the Contract:
1.
Article I of the Contract is amended to include the
additional engineering services specified in a proposal letter
dated February 11, 2011, a copy of which is attached hereto and
incorporated herein. The cost to City for the additional design
services to be performed by Engineer total $13,020.00.
2.
Article II of the Contract is amended to provide for an
increase in the maximum fee to be paid to Engineer for all work
and services performed under the Contract, as amended, so that the
total fee paid by the City for all work and services shall not
exceed the sum of $457,303,00.
City of Fort Worth, Texas
Amendment to Engineering Agreement
PMO Official Release Date: 10.01.2010
Page 1 of 2
3.
All other provisions of the Contract which are not expressly amended
herein shall remain in full force and effect.
EXECUTED
Tarrant County,
ATTEST:
Marty Hendrix
City Secretary
on this the
Texas.
14 day of February,
2011, in Fort Worth,
APPROVAL RECOMMENDED: APPROVED:
Greg
Interi
Transpo
P.E.
or,
and Public Works
Dunaway Associates, L.P.
ENGINEER
By:
a
Fernando Cost
Assistant City Manager
Name: Stephen James, P.E.
Director, Public Sector Services
550 Bailey Avenue, Suite 400
Fort Worth, Texas 76107
APPROVED AS TO FORM AND LEGALITY:
Assistant City Attorney
City of Fort Worth, Texas
Amendment to Engineering Agreement
PMO Official Release Date: 6.18.2010
Page 2 of 2
REQUIRED
OFFICIAL RECORD
CITY SECRETARY
FT• WORTHw TX
EXHIBIT "A"
Dunaway No. 2008042-03 & -04
February 11, 2011
Mr. Patrick J. Buckley, P.E.
City of Fort Worth
Transportation and Public Works Department
1000 Throckmorton Street, 2nd Floor
Fort Worth, Texas 76102
Reference: Summer Creek Drive Contract Amendment No. 1
City Project No. 00997
City Secretary Contract No. 39970
Dear Mr. Buckley:
Dunaway Associates, L.P. is pleased to submit this Contract Amendment No. 1 for additional
professional civil engineering and land surveying services requested by the City for Summer
Creek Drive and McPherson Boulevard.
1. Roundabout at McPherson Intersection
1.1. Per meeting with City staff on November 4, 2010 it was decided that the
proposed signalized intersection at the Summer Creek and McPherson
intersection will be replaced with a roundabout.
1.1.1. The traffic signal at McPherson will no longer be needed because of the
roundabout. It was also decided to eliminate the traffic signal Risinger
Road. Credit will be offered for the design fee associated with traffic signals
at both Risinger Road and McPherson.
1.1.2. Because the roundabout north of the existing intersection will require less
pavement than a signalized intersection, a credit will be offered for the
design fee associated with the reduction in pavement area.
1.2. Conceptual Design of Roundabout will consist of the following tasks:
1.2.1. Task 1: Operational Analysis
1.2.1.1. Operational performance analysis of a roundabout based on delay
and queuing criteria using ARCADY (Assessment of Roundabout
Capacity and Delay) for both the 2012 AM and PM peak hours.
1.2.1.2. Operational performance analysis of a roundabout based on delay
and queuing criteria using ARCADY for both the 2022 AM and PM_
peak hours. OFFICIAL RECORD
CITY SECRETARY
550 [tolley Avenue, Suite d00 ti Forf yJorth, Texas 76107 � Tel: t117.335.1 121 g Fox: II17.335.7437 � dlrnowayassorlatos:com
® Amendment No. 1
February 11 2011
Page 2
1.2.1.3. Recommended lane configuration.
1.2.2. Task 2: Traffic SimulationNisualization
1.2.2.1. The simulation shall be prepared using VISSIM Microscopic
Traffic Simulation Software. The capacity performance of the
roundabout should be based on the previously performed ARCADY
analysis, which is derived from actual capacity observations. The
VISSIM simulation will be adjusted to best reflect the delay predicted
by ARCADY. VISSIM only has two parameters for calibrating entry
capacity; gap and headway. As such, exact calibration of the
simulation to match ARCADY is not always possible.
1.2.2.2. Two VISSIM simulations will be prepared, one for 2012 and one
for 2022. The highest predicted traffic volumes will be used to prepare
one simulation (AM or PM) for each design year.
1.2.2.3. A graphical video for each simulation will be provided for meetings
and public presentations. Each video will be approximately three
minutes long.
1.2.3. Task 3: Conceptual Design
1.2.3.1. At the conceptual stage, recommendations on the design
requirements for the roundabout alternative will be provided. This will
include:
• Suggested circle size
• Lane configuration (two lane alternatives versus single lane
entries)
• Considerations for circle location
• General alignment of approach arms with consideration for
property and other constraints
1.2.4. Task 4: Preliminary Design
1.2.4.1. Horizontal Geometry
• Refine geometries for safety, capacity, and cost based on
ROW, utilities and other constraints.
• Construction staging recommendations (e.g., conversion to 3-
lane at a later date). An ultimate lane configuration will be
designed and then scaled back to an interim design for
construction.
• Check roundabout functionality of fast paths, vision angles,
and phi angles.
• Recommend provisions for crosswalk locations and bicycle
ramp treatments.
• Provide visibility design recommendations in accordance with
FHWA guidelines.
OFFICIAL RECORD
CITY SECRETARY
FT. WORTH, TX
® Amendment No. 1
February 11, 2011
Page 3
1.2.4.2. Signing & Pavement marking
0 Recommendations on the use and layout of special signs.
A Recommendations for pavement markings for roundabout
intersection and approaches, including lane designation
arrows, crosswalks, entry and exit markings, specifying type,
location and dimensions.
A summary of the proposed budget for this contract amendment is as follows (See Exhibit A-
1) for a detailed man-hour estimate of these tasks):
Basic Fee Fee
1 Additional Traffic Engineering Design Services(LUMP Sum
$ 38 550.00
2 Credits
$ 25 530.00
TOTAL PROPOSED AMENDMENT
1102
A summary of the total project is as follows:
Contract
Description
Fee
Original Contract
Paving and Drainage Improvernents
$444 283.00
Amendment No. 1
Additional Traffic Engineeirng Design Services
$131020.00
TOTAL PROJECT $4571303.00
Please review the enclosed information and do not hesitate to call me if you have any
questions or require additional information regarding this amendment.
Sincerely,
DUNAWAY ASSOCIATES, L.P.
a Texas limited partnership
(7W /►IVO>
Stephen James, P.E.
Director, Public Sector Services
2008042 Amendment#1 Ourston only_PBuckiey_2.11.2011.docx
OFFICIAL RECORD
CITY SECRETARY
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CITY SECRETARY
T. WORTHTX