February 15, 2022
Craig Scott
City of Cotati
201 West Sierra Avenue
Cotati, CA. 94931
Subject: City of Cotati, Inflow and Infiltration Services, Amendment 1: West Sierra Avenue Sewer Main Replacement
B&R Project No.: 4656.04
Dear Craig:
The City of Cotati had portions of the sewer collection system video inspected during 2021. Brelje and Race has reviewed the resulting video inspection reports, catalogued the defects, and located the defects on a sewer facilities map and is preparing a Repair Memo which provides recommendations to address the identified defects as well as prioritization and cost estimation for each recommended repair. The design portion of the project has not started. The City has also identified and preliminarily scheduled road repair or reconstruction projects. Rehabilitation of West Sierra Avenue is scheduled to be constructed in spring of 2023. The sewer main in West Sierra Avenue has documented defects and requires upsizing according to the City’s sewer master plan. The recommendation for this portion of the system is therefore to replace the sewer. The sewer replacement in West Sierra Avenue has been prioritized over the other repairs/replacements because of the road reconstruction project.
Per the City’s request we have reviewed the budget, effort expended to date for the currently contracted project, and anticipated design fees for the proposed replacement project. Provision of the design phase services for the West Sierra Avenue sewer replacement can be accomplished by amending the scope of the existing contract to exclude the preparation of the repair project construction documents and instead include the design scope below and as shown on the attached Amendment 1 Engineering Services and Workhour Estimate.
It is understood the West Sierra Avenue Sewer Replacement project includes replacement of approximately 2,000 lineal feet of sewer main (from Water Road to Olof Street), including seven manholes and approximately seventeen laterals. It is understood the new main and manholes would be installed at the same alignment and locations as the existing and the laterals are to be replaced to the back side of the sidewalk or edge of the right of way. The estimated construction cost for the pipeline replacement project is $1,160,000.
In addition to producing the Repair Memo, Brelje and Race proposes to provide all required engineering services for the replacement of the sewer main in West Sierra Avenue from preliminary design through receipt of bids. We propose to produce a set of construction documents consisting of a project manual with improvement plans consisting of nine sheets having the titles shown on the enclosed Amendment 1 Engineering Service Workhour Estimate. Base mapping for the project will be developed from a design survey that will be conducted after the utilities are marked, and any record Craig Scott
February 15, 2022
plans the City is able to provide for the roadway segment and utilities located therein or nearby. A set of construction documents (95% completion level) will be submitted to the City for review. The submittal will consist of a generally complete set of improvement plans and project manual. A review meeting (by phone) will be conducted with City staff and agreed upon changes/comments incorporated into the final documents.
Bid phase services to be provided will consist of preparing the Notice to Bidders for placement in a local newspaper and assistance with addenda preparation. All other bid phase activities will be accomplished by the City Staff.
Construction phase services are not included in the proposed scope and can be added by amendment should that be desired.
Services for which the City would be responsible include locating existing sewer and water facilities including laterals, potholing existing sewer mains to confirm piping material and backfill types, furnishing record drawings of the existing facilities, construction document reviews, any required legal services, placement and payment of the bid advertisement, and bid document distribution.
The enclosed Amendment 1 Engineering Service Workhour Estimate shows our fee estimate for the above amended scope of services. The requested budget for the amended scope of services including Repair Memo services, and the design and bid phase services remains unchanged at $157,000 (current contract value). The budget for the Repair Memo phase services includes a 10% contingency, and the budget for the design and bid phase services includes a 15% contingency. The manpower rates utilized to establish the budget are those currently in effect. The additional 5% contingency for the design and bid phase services is to cover an anticipated rate increase that will become effective March 1, 2022.
Please don’t hesitate to contact me should there be any questions regarding this amendment proposal.
Very truly yours,
BRELJE & RACE Amendment Accepted City of Cotati.
Brent Beazor By: Date:
Vice President Title:
Enclosure Workhour Estimate
PHASE TASK DESCRIPTION
Associate
Principal
Associate Engineering
Technician
CAD
Technician
Senior
Surveyor
Survey
Technician
Survey Crew Technical
Writer
Subconsultant ($)
Repair Memo 1.01 Kickoff Meeting 3 2
1.02 Site Review 3 31.03 Base Mapping 4 10 20 641.04 Preliminary repair memo 24 50 120 Subtotal 34 65 140 64 0 0 0 0 0
Total Hours 34 65 140 64 0 0 0 0 N/A
Hourly Rate $215 $205 $150 $140 $175 $150 $265 $110 N/A Subtotal Cost $7,310 $13,325 $21,000 $8,960 $0 $0 $0 $0 $0 Repair Memo Subtotal $51,000
CONTINGENCY $5,100
REPRO & PLOT $900
$57,000
1.01 Kickoff Meeting 4 4 21.02 Site Review 4 4 121.03 Base Mapping 1 4 40 40 4 4 24 Subtotal 9 12 54 40 4 4 24 0 $0
95% Submittal Drawings
2.01 Cover 1 1 1 2
2.02 Notes and Abbreviations 1 1 1 4
2.03 Plan/Profile 1 4 8 8
2.04 Plan/Profile 1 4 8 8
2.05 Plan/Profile 1 4 8 8
2.06 Plan/Profile 1 4 8 8
2.07 Plan/Profile 1 4 8 8
2.08 Plan/Profile 1 4 8 8
2.09 Construction Details 1 4 16 8
2.10 Specifications 8 32 8
Subtotal 17 62 66 62 0 0 0 8 $0
Sewer Collection System Repairs
AMENDMENT 1 - ENGINEERING SERVICES WORK HOUR ESTIMATE and COST TABULATION Revised 2/11/2022
City of Cotati
WORKHOURS
Design Phase Services
Sewer
Replacement
Preparation
Total Desgn Phase Services
PHASE TASK DESCRIPTION
Associate
Principal
Associate Engineering
Technician
CAD
Technician
Senior
Surveyor
Survey
Technician
Survey Crew Technical
Writer
Subconsultant ($)
Sewer Collection System Repairs
AMENDMENT 1 - ENGINEERING SERVICES WORK HOUR ESTIMATE and COST TABULATION Revised 2/11/2022
City of Cotati
WORKHOURS
Design Phase Services
Drawings
3.01 Cover 1 1 1
3.02 Notes and Abbreviations 1 1 1 1
3.03 Plan/Profile 1 1 4 2
3.04 Plan/Profile 1 1 4 2
3.05 Plan/Profile 1 1 4 2
3.06 Plan/Profile 1 1 4 2
3.07 Plan/Profile 1 1 4 2
3.08 Plan/Profile 1 1 4 2
3.09 Construction Details 1 2 4 4
3.10 Specifications 8 16 4
Subtotal 16 26 30 18 0 0 0 4 $0
4.01 Bid Advertisement 12 24.02 General Bid Process 24.03 Prebid Conference 44.04 Addenda Preparation and Processing 6 3 3
4.05 Contract Award/Preparation/Processing 4 44.06 General Administration 2 Subtotal 12 18 0 3 0 0 0 9 $0
Total Hours 54 118 150 123 4 4 24 21 N/A
Hourly Rate $215 $205 $150 $140 $175 $150 $265 $110 N/A Subtotal Cost $11,610 $24,190 $22,500 $17,220 $700 $600 $6,360 $2,310 $0 Design Phase Services Subtotal $86,000
CONTINGENCY $12,900
REPRO & PLOT $1,100
$100,000$157,000
Construction DocumentsBid Phase Services
Total Desgn Phase Services
Total