HomeMy WebLinkAboutPW Southern Heights Bridge Replacement____________________________________________________________________________________
FOR CITY CLERK ONLY
Council Meeting: December 6, 2021
Disposition: Resolution 15007
Agenda Item No: 5.j
Meeting Date: December 6, 2021
SAN RAFAEL CITY COUNCIL AGENDA REPORT
Department: Public Works
Prepared by: Bill Guerin,
Director of Public Works
City Manager Approval: __________
TOPIC: SOUTHERN HEIGHTS BRIDGE REPLACEMENT
SUBJECT: RESOLUTION APPROVING AND AUTHORIZING THE CITY MANAGER TO
EXECUTE A FOURTH AMENDMENT TO THE AGREEMENT WITH MARK
THOMAS & COMPANY, INC. FOR SLOPE STABILITY ANALYSIS, IN AN
ADDITIONAL CONTRACT AMOUNT NOT TO EXCEED $51,789
RECOMMENDATION:
Adopt a resolution approving and authorizing the City Manager to execute a third amendment to
the Professional Services Agreement with Mark Thomas and Company, Inc. (Mark Thomas) for
slope stability analysis in an amount not to exceed $51,789, increasing the total not-to-exceed
amount under the agreement to $949,831.
BACKGROUND:
During a routine bridge inspection conducted by Caltrans, the Southern Heights Bridge was
identified as needing to be reconstructed to meet current design, structural, and safety
standards. In June 2016, the City entered into a Professional Services Agreement with Mark
Thomas & Company, Inc. to begin preliminary services and public outreach for this project. In
December 2017, the City Council approved a first amendment to this agreement to perform final
design and right of way services. In February 2019, Council approved a second amendment to
this agreement to perform additional final design and right of way services. In June 2020, the
City Council approved a third amendment to this agreement for construction support and
additional right of way services.
On December 14th, 2020 the City’s contractor began construction of the Southern Heights
Bridge Replacement Project. The project is estimated to be completed in December 2021.
ANALYSIS: As a result of this project, construction activities along the steep hillside have
disturbed the soil within the bridge footprint. This disturbance was already anticipated as part of
the project design which included erosion control measures such as the installation of soil
retaining netting, hydroseeding, rip-rap, and new tree plantings. However, several residents
have expressed concern whether these measures are sufficient to prevent a future landslide.
SAN RAFAEL CITY COUNCIL AGENDA REPORT / Page: 2
On October 12, 2021, City staff met with design staff from Mark Thomas and their geotechnical
subconsultant, Parikh Consultants at the Southern Heights Bridge construction site to discuss
the post-construction slope stability of the soils under the bridge deck. The design team
recommended that the City have a slope stability analysis prepared of the current conditions to
verify whether additional measures may be required to stabilize the slope under the bridge. City
staff requested a proposal from Mark Thomas and their subconsultant to amend the existing
professional services agreement to include a slope stability analysis.
FISCAL IMPACT: The proposed fourth amendment to the professional services agreement will
increase the agreement by $51,789. This amount will be appropriated in the Capital Project
Fund 401. City staff will seek reimbursement of these expenses through the Caltrans Highway
Bridge Program grant.
OPTIONS: The City Council has the following options to consider relating to this matter:
1. Adopt the resolution as presented.
2. Do not adopt a resolution and provide further direction to staff.
RECOMMENDED ACTION: Adopt a resolution approving and authorizing the City Manager to
execute a fourth amendment to the agreement with Mark Thomas & Company, Inc. to conduct a
slope stability analysis in an amount not to exceed $51,789.
ATTACHMENT:
1. Resolution Approving and Authorizing the City Manager to Execute a Fourth
Amendment to the Agreement with Mark Thomas & Company, Inc. for Slope Stability
Analysis, in an Additional Contract Amount Not to Exceed $51,789
2. Fourth Amendment to Professional Services Agreement with Mark Thomas & Company,
Inc for the Southern Heights Bridge Replacement Project, and corresponding Exhibit A:
Scope of Work
1
RESOLUTION NO. 15007
RESOLUTION OF THE CITY COUNCIL OF THE CITY OF SAN RAFAEL APPROVING
AND AUTHORIZING THE CITY MANAGER TO EXECUTE A FOURTH AMENDMENT
TO THE AGREEMENT WITH MARK THOMAS & COMPANY, INC. FOR SLOPE
STABILITY ANALYSIS, IN AN ADDITIONAL CONTRACT AMOUNT NOT TO EXCEED
$51,789
WHEREAS, pursuant to City Council Resolution #14129, the City of San Rafael and Mark
Thomas & Company, Inc. (“Mark Thomas & Co.”) entered into a Professional Services Agreement
on June 7, 2016, for preliminary engineering and public outreach in connection with City’s
Southern Heights Bridge Replacement project, for an amount not to exceed $241,568 (the
“Agreement”); and
WHEREAS, pursuant to City Council Resolution #14439, the City and Mark Thomas &
Co. entered into a First Amendment to the Agreement dated December 26, 2017, to perform final
design and right of way services for an amount not to exceed $343,499 and increasing the total
not to exceed amount under the Agreement to $585,067; and
WHEREAS, pursuant to City Council Resolution #14634, the City and Mark Thomas &
Co. entered into a Second Amendment to the Agreement dated February 8, 2019, to perform
additional final design and right of way services for an amount not to exceed $132,777 and
increasing the total not to exceed amount under the Agreement to $717,844; and
WHEREAS, pursuant to City Council Resolution #14826 on June 15, 2020, the City and
Mark Thomas & Co. entered into a Third Amendment to the Agreement dated 2020, for
construction support and additional right of way services for an amount not to exceed $180,198
and increasing the total not to exceed amount under the Agreement to $898,042; and
WHEREAS, the City requires a slope stability analysis for the slope under the newly
constructed Southern Heights Bridge; and
WHERAS, staff received a proposal from Mark Thomas & Co. for said services in a total
amount not to exceed $51,789 and staff has reviewed the proposal and found it complete and
within industry standards;
WHEREAS, $51,789 will be appropriated in Capital Project Fund 401 pending
reimbursement from the Caltrans Highway Bridge Program grant;
2
NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF SAN RAFAEL RESOLVES as
follows:
1. The Council hereby approves and authorizes the City Manager to execute a fourth
amendment to the Agreement with Mark Thomas & Company, Inc. for slope stability
analysis in connection with the Southern Heights Bridge Replacement Project, in the
amount of $51,789 and a revised total contract value not to exceed $949,831 in the form
included with the staff report supporting this resolution, subject to final approval as to form
by the City Attorney.
2. The Director of Public Works is hereby authorized to take any and all such actions and
make changes as may be necessary to accomplish the purpose of this resolution.
I, LINDSAY LARA, Clerk of the City of San Rafael, hereby certify that the foregoing
resolution was duly and regularly introduced and adopted at a regular meeting of the Council of
said City on the 6th day of December 2021, by the following vote, to wit:
AYES: COUNCILMEMBERS: Bushey, Hill, Kertz, Llorens Gulati & Mayor Kate
NOES: COUNCILMEMBERS: None
ABSENT: COUNCILMEMBERS: None
LINDSAY LARA, City Clerk
FOURTH AMENDMENT TO THE PROFESSIONAL SERVICES AGREEMENT WITH
MARK THOMAS & COMPANY, INC. FOR PROFESSIONAL SERVICES FOR THE
SOUTHERN HEIGHTS BRIDGE REPLACEMENT PROJECT
THIS FOURTH AMENDMENT to the Professional Services Agreement by and
between the CITY OF SAN RAFAEL (hereinafter "CITY"), and MARK THOMAS &
COMPANY, INC., (hereinafter "CONSULTANT"), is made and entered into as of the
,,A— day of , 2021.
RECITALS
WHEREAS, pursuant to City Council Resolution #14129, the CITY and CONSULTANT
entered into a Professional Services Agreement on June 7, 2016, for preliminary engineering and
public outreach in connection with CITY'S Southern Heights Bridge Replacement project, for an
amount not to exceed $241,568 (the "Agreement"); and
WHEREAS, pursuant to City Council Resolution #14439, the CITY and CONSULTANT
entered into a First Amendment to the Agreement dated December 26, 2017, to perform final
design and right of way services for an amount not to exceed $343,499 and increasing the total
not to exceed amount under the Agreement to $585,067; and
WHEREAS, pursuant to City Council Resolution #14634, the CITY and CONSULTANT
entered into a Second Amendment to the Agreement dated February 8, 2019, to perform
additional final design and right of way services for an amount not to exceed $132,777 and
increasing the total not to exceed amount under the Agreement to $717,844; and
WHEREAS, pursuant to City Council Resolution #14826 on June 15, 2020, the CITY and
CONSULTANT entered into a Third Amendment to the Agreement dated 2020, for construction
support and additional right of way services for an amount not to exceed $180,198 and increasing
the total not to exceed amount under the Agreement to $898,042; and
WHEREAS, the City requires a slope stability analysis for the slope under the newly
constructed Southern Heights Bridge; and
WHERAS, staff received a proposal from Mark Thomas & Company, Inc. (Exhibit A) for
said services in a total amount not to exceed $51,789 for the fourth amendment and staff has
reviewed the proposal and found it complete and within industry standards;
I
AMENDMENT TO AGREEMENT
NOW, THEREFORE, the parties hereby agree to amend the Agreement as
follows:
1. Article II of the Agreement, entitled "STATEMENT OF WORK" is hereby
amended to include the additional services set forth in CONSULTANT's
proposal entitled "Scope of Services" dated November 21, 2021, attached
to this Fourth Amendment as "Exhibit A" and incorporated herein by
reference.
2. Article V of the Agreement, entitled "ALLOWABLE COSTS AND
PAYMENTS" is hereby amended to include additional compensation
payable to CONSULTANT for the services described in "Exhibit A" to this
Fourth Amendment, on a time and materials basis in accordance with the
"Scope of Services" included in "Exhibit A", in a not to exceed amount of
$51,789, and to change the total not to exceed amount under the
Agreement to $949,831.
3. Except as specifically amended herein, all the other provisions, terms, and
obligations of the Agreement between the parties shall remain valid and
shall be in full force.
2
IN WITNESS WHEREOF, the parties have executed this Fourth Amendment on
the day, month, and year first above written.
CITY OF SAN RAFAEL
ATTEST:
of5
frr LINDSAY LARA, City Clerk
APPROVED AS TO FORM
LQ I
ROBERT F. EPSTEIN, CityAttorney
CONSULTANT:
MARK THOMAS & COMPANY, INC.
By:
Name: Zach Siviglia
Title: President
and
Name: R. Matt Brogan
Title: Secretary
\/ MARK
THOMAS
SCOPE OF WORK
TASK 1. SLOPE STABILITY ANAYLSIS
Task 1.1. Geotechnical Investigation
Southern Heights Bridge Replacement - Amendment .'-.'4
City of San Rafael
November 21. 2021
Par kh will drill one short boring on the slope to verify the soil / rock condition. This will require portable
equipment and preparation of a level pad to setup the tripod and Minuteman drill rig. A long day of drilling work
is expected. For the steep s ope, the standard jute netting may not be adequate, and Parikh will work with Mark
Thomas to consider more heavy duty erosion control products. Parikh will also evaluate the slope profile and
determine if a bench/break in the middle of the s ope would be helpful. The possibility of 'nstalling short
landscape timber walls to terrace the slope may also be considered. Parikh assumes discuss'on and interaction
with the Mark Thomas and the City will be necessary. A geotechnical memo summarizing the geotechnical
recommendations will be prepared.
Task 1.2. Topographic Survey
Mark Thomas will perform a field survey to establish control to facilitate topographic surveys of the site. Inter -
visible local project horizontal control (NAD83) and vertical control (NAVD88) will be established to facilitate a
terrestrial scan of the slope. Control point coordinates, basis of bearings and coordinates, and benchmark notes
will be provided to show on plans. Topographic mapping of the roughly 950 feet of slope will be sufficient to
serve as the basis for design of slope stabi ity improvements. This scope of work assumes one day of field work
for the control, and one extended day of field work for the topographic survey.
Task 1.3. Slope Stability/Erosion Control Design
Mark Thomas will prepare erosion control plans including revised planting and irrigation plans. Structure plans
will be developed for the landscape timber walls if recommended for slope stability by Parikh. Up to four plan
sheets will be prepared based on the post -construction survey and geotechnical recommendations.
DELIVERABLES
• Geotechnical Memo
• Post -construction topograph'c survey
• Slope Stability/Erosion Control Plans
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