4889-9005-8232 v1
CONSULTANT SERVICES AGREEMENT AMENDMENT
NO. 1
This AMENDMENT NUMBER 1 is entered into as of the 8th of December 2025 by and between the CITY OF PACIFICA, herein called the “City,” and Cotton, Shires and Associates, Inc., herein called the “Consultant.”
RECITALS
A. City desired to obtain Geotechnical Services in connection with the sever winter storms between 2022 and March 2023, and for that purpose entered into an agreement with Consultant dated 27th day of June, 2024 (“Original Agreement”).
B. Consultant hereby warrants to the City that Consultant is skilled and able to provide such services described in this Amendment No. 1.
C. City desires to authorize Consultant to provide the additional services described in this Amendment No. 1.
AGREEMENT
1. Scope of Services. The services to be provided are as outlined in the proposed Amendment No.1 provided to City by Consultant, dated October 22, 2025, and attached hereto as Exhibit A “Scope of Amendment No. 1 and incorporated by reference (“Additional Work”). Consultant shall perform such Additional Work as requested by City through its staff from time to time.
2. Time of Performance. The services of Consultant are to commence upon direction to proceed from City staff and shall be undertaken and completed by June 25, 2026 for the City to comply with requirements imposed upon by the City.
3. Compensation and Method of Payment.
A. Compensation. The compensation to be paid to Consultant, including both payment for professional services and reimbursable expenses, shall be at the rate and schedules set forth in the Original Agreement and this Amendment [ ]. However, in no event shall the amount of Consultant’s compensation for the Additional Work exceed an additional $71,680.00. The total combined compensation for the Original Agreement and this Amendment No. 1 shall not exceed $291,460.00. Payment by City under the Original Agreement, as amended, shall not be deemed a waiver of defects, even if such defects were known to City at the time of payment. The 5% retention does not apply to Consultant’s compensation.
B. Method of Payment. [DESCRIBE PAYMENTS – EXAMPLE BELOW] i. Monthly Statements. As a condition precedent to any payment to Consultant under the Original Agreement, as amended, Consultant shall submit monthly to
4889-9005-8232 v1
the City a statement of account that clearly sets forth the designated items of work for which the billing is submitted. Each statement of account shall also include a detailed record of the month's actual reimbursable expenditures. ii. Timing of Payment. City shall review and approve Consultant's monthly statement and pay Consultant for services rendered hereunder if acceptable to the satisfaction of the City at the rates and in the amounts provided hereunder on a monthly basis in accordance with the approved monthly statements.
C. Changes in Compensation. Consultant shall not undertake any work on the Additional Work that will incur costs in excess of the amount of $71,680.00 or any work under the Original Agreement, as amended by this Amendment No. 1 D. in excess of the amount of $291,460.00 without further written amendment to the Original Agreement.
4. Agreement in Effect. All other provisions of the Original Agreement, as amended, shall remain in full force and effect.
IN WITNESS WHEREOF, the City and Consultant have executed this Amendment No.1 as of the date first written above.
CITY OF PACIFICA CONSULTANT
Cotton, Shires and Associates, inc.
By: ________________________ By: _____________________
Kevin Woodhouse David T Schier
City Manager CEO
ATTEST:
By: __________________________
Sarah Coffey
City Clerk
APPROVED AS TO FORM:
By: ______________________
Michelle M. Kenyon
City Attorney
4889-9005-8232 v1
EXHIBIT A
SCOPE OF AMENDMENT
Northern California Office Central California Office Southern California Office 646 University Avenue 6417 Dogtown Road 699 Hampshire Road, Suite 102 Los Gatos, CA 95032 San Andreas, CA 95249‐9640 Thousand Oaks, CA 91361‐2352 (408) 354‐5542 (209) 736‐4252 • Fax (209) 736‐1212 (805) 370‐8710
www.cottonshires.com
COTTON, SHIRES AND ASSOCIATES, INC.
CONSULTING ENGINEERS AND GEOLOGISTS
October 22, 2025
E6314
By Email ([email protected])
Mr. Bryan Bautista
Assistant Civil Engineer
CITY OF PACIFICA
Public Works Department
151 Milagra Drive
Pacifica, California 94044
SUBJECT: Proposal For Supplemental Geotechnical and Civil Services RE: CITY OF PACIFICA
Adobe Drive (opposite 1580/1590 Higgins), Sewer at 601 Talbot Avenue, 1475 Rosita Road, and Sharp Park Road
Pacifica, California
Dear Mr. Bautista:
Cotton, Shires and Associates, Inc. (CSA) is pleased to provide the City of Pacifica (City) with this proposal for supplemental geotechnical and civil services. It is our understanding that the City would like CSA to prepare civil drawings and technical specifications for two landslide impacted sites which CSA previously mapped and evaluated including 1475 Rosita Road, and Sharp Park Road. We also understand that the City would like CSA to revise previously prepared civil plans and specifications to address anticipated City comments for a retaining wall replacement at Adobe Drive (opposite 1580/1590 Higgins), and a sewer pipeline replacement downslope of 601 Talbot Avenue.
We propose the following Scope of Work, Cost and Budget Breakdown and Schedule to perform the requested geotechnical and civil services for each of the selected four sites.
SCOPE OF WORK
We have organized the proposed scope of work for each of the four sites in the following section.
Bryan Bautista October 22, 2025
COTTON, SHIRES AND ASSOCIATES, INC.
1475 ROSITA ROAD
It is our understanding that the City would like CSA to prepare plans and technical specifications to restore the slope damaged by a landslide located above a shotcrete wall along the southern bank of San Pedro Creek, adjacent to the backyard at 1475 Rosita Road.
We also anticipate that the slope restoration will include a geogrid, reinforced engineered slope, a backdrain, and removal of trees. CSA previously prepared a topographic map, drilled borings, completed laboratory testing, prepared a cross section, completed slope stability analysis, and developed mitigation alternatives. We understand that the City has selected the grading alternative to restore the slope. We also understand that the homeowner requests a roughly 6‐ to 7‐foot wide level or gently slopeed area beyond their fence.
We propose to prepare plans and technical specifications using the previously prepared topographic map as a base.
I. Complete Design, Prepare Draft and Final Plans and Technical Specification
A. We will prepare a draft set of plans and technical specifications for City comments.
B. We will respond to City comments and prepare a final set of plans and technical specifications
II. Project Management
A. Project Management – We will provide Project Management throughout the project.
B. Site Visits – We will complete two site visits to confirm site conditions and suitability of design.
C. Quantities and Engineer’s Cost Estimate – We will calculate construction quantities and develop an engineer’s construction cost estimate using unit costs from previous bids.
SHARP PARK ROAD
It is our understanding that the City would like CSA to prepare plans and technical specifications to support the portions of the concrete lined V‐ditch undermined by a recent Bryan Bautista October 22, 2025
COTTON, SHIRES AND ASSOCIATES, INC.
landslide located on a slope above Sharp Park Road. We previously mapped the site and provided the City with two alternatives to address the undermined V‐ditch. We recommend that the City replace the undermined section of V‐ditch with a new V‐ditch section that is designed as a retaining wall to span an unsupported 15‐foot section.
We propose to prepare plans and technical specifications using the previously prepared topographic map as a base.
I. Complete Design, Prepare Draft and Final Plans and Technical Specification
A. We will consult with a Structural Engineer to assist us with the V‐ ditch retaining wall design.
B. We will prepare a draft set of plans and technical specifications for City comments.
C. We will respond to City comments and prepare a final set of plans and technical specifications
II. Project Management
A. Project Management – We will provide Project Management throughout the project.
B. Site Visits – We will complete two site visits to confirm site conditions and suitability of design.
C. Quantities and Engineer’s Cost Estimate – We will calculate construction quantities and develop an engineer’s construction cost estimate using unit costs from previous bids.
ADOBE DRIVE (OPPOSITE 1580/1590 HIGGINS)
It is our understanding that the City would like CSA to revise the previously prepared plans and technical specification to incorporate City comments, and to revise the engineers cost estimate.
Bryan Bautista October 22, 2025
COTTON, SHIRES AND ASSOCIATES, INC.
I. Prepare Final Plans and Technical Specification
A. We will respond to City comments and prepare a final set of plans and technical specifications
II. Project Management
A. Project Management – We will provide Project Management throughout the project.
B. Site Visits – We will complete two site visits to confirm site conditions and suitability of design.
C. Quantities and Engineer’s Cost Estimate – We will update our calculated construction quantities and develop an engineer’s construction cost estimate using updated unit costs from previous bids.
601 TALBOT AVENUE ‐ SEWER PIPELINE DOWNSLOPE
It is our understanding that the City would like CSA to revise the previously prepared plans and technical specification to incorporate City comments, and to revise the engineers cost estimate.
I. Prepare Final Plans and Technical Specification
A. We will respond to City comments and prepare a final set of plans and technical specifications
II. Project Management
A. Project Management – We will provide Project Management throughout the project.
B. Site Visits – We will complete two site visits to confirm site conditions and suitability of design.
C. Quantities and Engineer’s Cost Estimate – We will update our calculated construction quantities and develop an engineer’s Bryan Bautista October 22, 2025
COTTON, SHIRES AND ASSOCIATES, INC.
construction cost estimate using updated unit costs from previous bids.
COST AND BUDGET BREAKDOWN
We have included a Project Involvement and Budget Spreadsheet for each of the four landslides in the Appendix.
Site CSA Fees Direct Costs
(Outside)
Total Project
Budget
Adobe Drive $10,330 $70 $10,400
601 Talbot Avenue $10,330 $70 $10,400
1475 Rosita Road $23,070 $70 $23,140
Sharp Park $23,070 $4,670 $27,740
Total of all four sites: $71,680
We understand that there is remaining budget from our previous contract, which the City plans to carry over to this one.
SCHEDULE
We understand that the City plans to go out for bid in February of 2026, and we are confident that we can make that schedule, provided the City provides CSA with timely revisions to the drawings.
We anticipate that draft drawings for 1475 Rosita Road and Sharp Park can be prepared before February 2026, provided that we receive authorization to proceed prior to November 20, 2025; however, the Sharp Park schedule is dependent on the Structural Engineer’s schedule.
Please note that David Schrier has a vacation planned for 3 weeks in December 2025.
Bryan Bautista October 22, 2025
COTTON, SHIRES AND ASSOCIATES, INC.
AGREEMENT
If you agree with the Scope of Work, Schedule, and Fee outlined above, as well as the attached Schedule of Charges, Project Involvement and Project Budget, please issue a revised agreement/change order. Receipt of the revised agreement will constitute authorization for us to proceed. We look forward to providing the City with the professional services discussed above. If you have any questions, or need additional information, please contact us.
Very truly yours,
COTTON, SHIRES AND ASSOCIATES, INC.
David T. Schrier
Principal Geotechnical Engineer, GE 2334
Reviewed By:
Andrew Mead, Principal Engineering Geologist
AM:DTS:st
Attachment: Schedule of Charges, Project Involvements, and Project Budgets COTTON, SHIRES AND ASSOCIATES, INC.
SCHEDULE OF CHARGES
January 2025
Personnel Charges
Senior Principal Engineer/Geologist/Geophysicist $ 360/hr.
Principal Geologist/Engineer $ 305/hr.
Supervising Geologist/Engineer $ 245/hr.
Senior Geologist/Engineer $ 220/hr.
Senior GIS Specialist $ 200/hr.
Senior Staff Geologist/Engineer $ 190/hr.
Staff Geologist/Engineer $ 170/hr.
Field/Laboratory Technician $ 145/hr.*
Clerical/Accounting $ 105/hr.
Equipment, Mileage and Copying Charges
Downhole/Culvert Camera Inspection Equipment $ 300/day
Drone System $ 245/day
Inclinometer System $ 245/day
Piezometer Data Acquisition System $ 130/day
Total Station Surveying Equipment $ 370/day
GPS Surveying Equipment $ 475/day
Compaction Testing Moisture/Unit Weight Gauge $ 180/day Rope Climbing Safety Equipment $ 305/day
Multi-Channel Seismograph System and ReMi $ 360/day
NearMap Aerial Photographs $ 220/site
Vehicle Mileage (or Current IRS Approved Rate) $ 0.70/mi.
Aircraft Mileage (or Current GSA Approved Rate) $1.75/mi.
Photocopying (B&W-Color) $0.25-0.60/copy
Engineering (Large Format) Copier $ 0.65/ft.2
Computer Assisted Color Plotting $ 16/sq.ft.
Expert Witness Consultation Charges
Expert witness testimony for court appearances and binding arbitrations shall be charged on a daily basis (minimum one-half day increments) at a rate of $4,960 per day. Deposition testimony shall be charged at a rate of $620 per hour (minimum one-hour charge). Preparation time for depositions or court appearances shall be charged on a time-and-expenses basis in accordance with the Personnel, Equipment, Mileage, Copying and Expense charges listed herein.
Laboratory Testing and Geophysical Services Charges
Laboratory testing and geophysical services shall be charged on a time-andexpenses basis in accordance with the Personnel, Equipment, and Expense charges listed herein. Outside testing/services shall be charged at cost plus 15%.
Laboratory samples shall be stored for 60 days after the date of final report submittal unless special arrangements and fees are agreed upon for longer storage.
Prevailing Wage Charges
* Please contact Cotton, Shires and Associates, Inc. (CSA) to discuss the use of CSA field and/or laboratory personnel on public works or other projects subject to Prevailing Wage requirements. Higher hourly rates may apply.
Expense Charges (Receipted Costs Plus 15%)
• Travel expenses including air fare, lodging, vehicle rental, etc. (either actual receipted costs plus 15% for meals or a flat subsistence charge of $85 per diem for overnight stay shall be charged in addition to the lodging cost)
• Excavation subcontractors, outside laboratory testing and expendable field supplies (inclinometer casing, piezometers, stakes, paint, etc.). • Reproduction of drawings
• Photograph printing
• Special fees, permits, insurance, etc.
• Special mail service (air, electronic, courier, etc.) • Special equipment rental
• Special consultant fees
Cotton, Shires & Associates
Date: October 22, 2025PROJECT INVOLVEMENT
Personnel Hours by Task Subtask Cost
David T.
Schrier
Andrew Mead
Cody Sanford
Alex Noorzad
Sam Nolan
CSA Field Staff
Task I - Complete Design, Prepare Draft + Final Plans and Tech Specifications -Prepare Draft Plans and Specifications for City Review 32 6 13,350.00 $ Revise Drawings and Prepare Final Plans and Technical Specifications for Construction 6 2,160.00 $ Task II - Project Management -Project Management 8 2,880.00 $ Site Visit in October 2025 3 1,080.00 $ Site Visit to Observe Existing Conditions Once Tarp is Removed and Draft Plans Prep. 4 1,440.00 $ Calculate Quantities and Engineers Cost Estimate 6 2,160.00 $ Totals 59 0 0 0 6 0 $23,070.00 Principal
Geotechnical
Engineer P.E., G. E. Principal
Engineering
Geologist, P.G.,
C.E.G.
Senior Staff
Geologist
Staff Geologist
Principal
Geotechnical
Engineer, P.E., G.E.
Field
Engineer/Geologist
Project Name: 1475 Rosita Rd, PacificaProject Number: E6481 Task
Cotton, Shires and Associates
I. Personnel Costs
Professional Staff Hours Rate Total
David T. Schrier 59 360.00 $ $21,240.00
Andrew Mead 0 305.00 $ $0.00
Cody Sanford 0 190.00 $ $0.00
Alex Noorzad 0 170.00 $ $0.00
Sam Nolan 6 305.00 $ $1,830.00
CSA Field Staff 0 145.00 $ $0.00
Subtotal $23,070.00
II. Direct Costs Units/Miles Rate
Travel 100 0.70 $ $70.00
Driller $ $0.00 4,300.00
Structural Engineer $ $0.00 5,500.00
Laboratory Testing $ $0.00 1,100.00
Utility Locator $ $0.00 950.00
Pix4D Drone Data Processing $ $0.00 700.00
Drilling Permit 1,200.00 $ $0.00
Piezometers 600.00 $ $0.00
Slope Inclinometer Material 1,200.00 $ $0.00
Subtotal: $70.00
III. Total Budget $23,140.00
Project Number: E6481
Project Name: 1475 Rosita Rd, Pacifica
PROJECT BUDGET ESTIMATE
Date: October 22, 2025
Cotton, Shires & Associates
Date: October 22, 2025PROJECT INVOLVEMENT
Personnel Hours by Task Subtask Cost
David T.
Schrier
Andrew Mead
Cody Sanford
Alex Noorzad
Sam Nolan
CSA Field Staff
Task I - Complete Design, Prepare Draft + Final Plans and Tech Specifications -Prepare Draft Plans and Specifications for City Review 32 6 13,350.00 $ Revise Drawings and Prepare Final Plans and Technical Specifications for Construction 6 2,160.00 $ Task II - Project Management -Project Management 8 2,880.00 $ Site Visit in November 2025 3 1,080.00 $ Site Visit Prior to Bid, After Draft Plans Prep. 4 1,440.00 $ Calculate Quantities and Engineers Cost Estimate 6 2,160.00 $ Totals 59 0 0 0 6 0 $23,070.00 Principal
Geotechnical
Engineer P.E., G. E. Principal
Engineering
Geologist, P.G.,
C.E.G.
Senior Staff
Geologist
Staff Geologist
Principal
Geotechnical
Engineer, P.E., G.E.
Field
Engineer/Geologist
Project Name: Sharp Park Rd
Project Number: E6481
Task
Cotton, Shires and Associates
I. Personnel Costs
Professional Staff Hours Rate Total
David T. Schrier 59 360.00 $ $21,240.00
Andrew Mead 0 305.00 $ $0.00
Cody Sanford 0 190.00 $ $0.00
Alex Noorzad 0 170.00 $ $0.00
Sam Nolan 6 305.00 $ $1,830.00
CSA Field Staff 0 145.00 $ $0.00
Subtotal $23,070.00
II. Direct Costs Units/Miles Rate
Travel 100 0.70 $ $70.00
Driller $ $0.00 4,300.00
Structural Engineer 1 4,000.00 $ $4,600.00
Laboratory Testing $ $0.00 1,100.00
Utility Locator $ $0.00 950.00
Pix4D Drone Data Processing $ $0.00 700.00
Drilling Permit 1,200.00 $ $0.00
Piezometers 600.00 $ $0.00
Slope Inclinometer Material 1,200.00 $ $0.00
Subtotal: $4,670.00
III. Total Budget $27,740.00
Project Number: E6481
Project Name: Sharp Park Rd
PROJECT BUDGET ESTIMATE
Date: October 22, 2025
Cotton, Shires & Associates
Date: October 22, 2025PROJECT INVOLVEMENT
Personnel Hours by Task Subtask Cost
David T.
Schrier
Andrew Mead
Cody Sanford
Alex Noorzad
Sam Nolan
CSA Field Staff
Task I - Revise Drawings -Revise Drawings and Prepare Final Plans and Technical Specifications for Construction 6 2 2,770.00 $ Task II - Project Management -Project Management 8 2,880.00 $ Site Visit in November 2025 3 1,080.00 $ Site Visit Prior to Bid, After Draft Plans Prep. 4 1,440.00 $ Calculate Quantities and Engineers Cost Estimate 6 2,160.00 $ Totals 27 0 0 0 2 0 $10,330.00 Principal
Geotechnical
Engineer P.E., G. E. Principal
Engineering
Geologist, P.G.,
C.E.G.
Senior Staff
Geologist
Staff Geologist
Principal
Geotechnical
Engineer, P.E., G.E.
Field
Engineer/Geologist
Project Name: Adobe Higgins
Project Number: E6481
Task
Cotton, Shires and Associates
I. Personnel Costs
Professional Staff Hours Rate Total
David T. Schrier 27 360.00 $ $9,720.00
Andrew Mead 0 305.00 $ $0.00
Cody Sanford 0 190.00 $ $0.00
Alex Noorzad 0 170.00 $ $0.00
Sam Nolan 2 305.00 $ $610.00
CSA Field Staff 0 145.00 $ $0.00
Subtotal $10,330.00
II. Direct Costs Units/Miles Rate
Travel 100 0.70 $ $70.00
Driller $ $0.00 4,300.00
Structural Engineer $ $0.00 4,000.00
Laboratory Testing $ $0.00 1,100.00
Utility Locator $ $0.00 950.00
Pix4D Drone Data Processing $ $0.00 700.00
Drilling Permit 1,200.00 $ $0.00
Piezometers 600.00 $ $0.00
Slope Inclinometer Material 1,200.00 $ $0.00
Subtotal: $70.00
III. Total Budget $10,400.00
Project Number: E6481
Project Name: Adobe Higgins
PROJECT BUDGET ESTIMATE
Date: October 22, 2025
Cotton, Shires & Associates
Date: October 22, 2025PROJECT INVOLVEMENT
Personnel Hours by Task Subtask Cost
David T.
Schrier
Andrew Mead
Cody Sanford
Alex Noorzad
Sam Nolan
CSA Field Staff
Task I - Revise Drawings -Revise Drawings and Prepare Final Plans and Technical Specifications for Construction 6 2 2,770.00 $ Task II - Project Management -Project Management 8 2,880.00 $ Site Visit in November 2025 3 1,080.00 $ Site Visit Prior to Bid, After Draft Plans Prep. 4 1,440.00 $ Calculate Quantities and Engineers Cost Estimate 6 2,160.00 $ Totals 27 0 0 0 2 0 $10,330.00 Principal
Geotechnical
Engineer P.E., G. E. Principal
Engineering
Geologist, P.G.,
C.E.G.
Senior Staff
Geologist
Staff Geologist
Principal
Geotechnical
Engineer, P.E., G.E.
Field
Engineer/Geologist
Project Name: Talbot Ave Sewer
Project Number: E6481
Task
Cotton, Shires and Associates
I. Personnel Costs
Professional Staff Hours Rate Total
David T. Schrier 27 360.00 $ $9,720.00
Andrew Mead 0 305.00 $ $0.00
Cody Sanford 0 190.00 $ $0.00
Alex Noorzad 0 170.00 $ $0.00
Sam Nolan 2 305.00 $ $610.00
CSA Field Staff 0 145.00 $ $0.00
Subtotal $10,330.00
II. Direct Costs Units/Miles Rate
Travel 100 0.70 $ $70.00
Driller $ $0.00 4,300.00
Structural Engineer $ $0.00 4,000.00
Laboratory Testing $ $0.00 1,100.00
Utility Locator $ $0.00 950.00
Pix4D Drone Data Processing $ $0.00 700.00
Drilling Permit 1,200.00 $ $0.00
Piezometers 600.00 $ $0.00
Slope Inclinometer Material 1,200.00 $ $0.00
Subtotal: $70.00
III. Total Budget $10,400.00
Project Number: E6481
Project Name: Talbot Ave Sewer
PROJECT BUDGET ESTIMATE
Date: October 22, 2025