Notthingham Rd Basin 4 Sediment Pond and Channel Improvements Project: Engineering Construction Management Contract
CO-1
CHANGE ORDER
Order No.:____6__________________
Date: ___April 8, 2024_____________
Agreement Date: __April 15, 2022_____
NAME OF PROJECT: Flood Mitigation Next Steps
OWNER: Town of Avon, Colorado
CONTRACTOR: ___Alden Research Laboratory, LLC_________________________________
The following changes are hereby made to the CONTRACT DOCUMENTS:
Justification:
- Not to Exceed $27,464 is needed for Construction Support. See Exhibit A.
Change to CONTRACT PRICE: $__ $27,464_____________________
Original CONTRACT PRICE: $__$61,871_____________________
Current CONTRACT PRICE adjusted by previous CHANGE ORDER __$117,508___________
The CONTRACT PRICE due to this CHANGE ORDER will be (increased)(decreased) by
$__27,464____________________.
The new CONTRACT PRICE including this CHANGE ORDER will be $__144,972_________.
Change to CONTRACT TIME:
The CONTRACT TIME will be (increased)(decreased) by __N/A______ calendar days.
The date for completion of all work will be _____July 2024_____________________ (Date).
APPROVALS REQUIRED:
Approved by Engineer: N/A
Accepted by Contractor: Susan Cundiff________
Recommended by Project Manager: ___Eva Wilson____________________________________
Accepted and Approved by Owner: Eric Heil
Federal Agency Approval (where applicable): N/A
DocuSign Envelope ID: 15B09173-3007-479D-82BC-FCD04F68C027
4/10/2024
4/10/2024
4/11/2024
430 North College Avenue, Suite 449, Fort Collins, CO 80524 | verdantas.com
February 22, 2024
Eva Wilson, PE, PTOE, CFM
Town of Avon
P.O. Box 975
One Lake Street
Avon, CO 81620
Re: Proposal for Engineering Services during Construction
Basin 4 Sediment Mitigation
Dear Ms. Wilson,
This letter presents Verdantas’ proposal for engineering services during the construction of the
Basin 4 Sediment Mitigation Project.
Background
Tetra Tech Inc. prepared the conceptual design for Basin 4 sediment mitigation in February
2022 and Verdantas submitted the final design for the weirs in the Basin 4 sediment mitigation
project in October of 2022. The project includes the following improvements to Basin 4
sediment catchment basins and outlet channel:
•Regrading the two sediment catchment basin berms;
•Realigning and regrading the outlet channel;
•Installing Flexamat erosion protection matting; and
•Installing reinforced concrete weirs to slow and capture sediment.
These improvements are intended to prevent future erosion of the outlet channel from Basin 4,
and to reduce sediment loads reaching Nottingham Road.
Verdantas will provide engineering services during construction (ESDC) as detailed in the scope
of work below.
Exhibit A
DocuSign Envelope ID: 15B09173-3007-479D-82BC-FCD04F68C027
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Scope of Work
The main tasks included within this Scope of Work are:
1. Bid Support and Contractor Selection
2. Internal Project Management and Meetings with Town Engineers
3. Site Visits and Periodic Inspections
4. Construction Submittal Review
5. Requests for Information (RFIs) and Design Modifications
The following sections describe the specific tasks that will be performed as part of the ESDC of
the Basin 4 Sediment Mitigation project. Verdantas level of effort presented for the
construction of this project.
Task 1 - Bid Support
Provide support to the Town of Avon during the bid phase of the project to answer questions
related to the Basin 4 Sediment Mitigation project and to provide aid in contractor selection.
Verdantas has assumed $2000 of support.
Task 2 - Internal Project Management and meetings with Town Engineers
This task includes internal project management for the assumed six weeks of construction and
one month for project documentation and closeout. Project management includes project
setup, communication, and invoicing. Invoices will be sent monthly and will not be tied to
construction milestones. This does not include management of the Town’s construction project.
This task also includes participation in telephone meetings, as needed with Town engineers.
Verdantas has budgeted up to 14 total person hours for virtual meetings with Town Engineer to
support construction.
Task 3 - Site Visits and Construction Meetings
This task includes five (5) site visits for periodic inspection of the construction. The periodic
inspections will focus on the following key items:
• Coordinate and discuss construction steps
• Channel alignment
• Coordinate with Flexamat representative for installation
• Weir site preparation, rebar placement, and concrete pouring
• Address Contractor questions and conditions encountered in the field
• Final inspection/walk-through (develop final punch list of items to be completed by the
Contractor)
DocuSign Envelope ID: 15B09173-3007-479D-82BC-FCD04F68C027
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Brief summary notes (approximately one-page in length) will be sent to Avon summarizing the
construction observations.
Task 4 - Construction Submittal Review
Verdantas will review construction submittals for the project. The anticipated submittals to be
reviewed by Verdantas include:
• General plan with sequence of construction
• Access plan
• Concrete mix design and accessories
• Concrete placement plan
• Procedures for hot/cold weather concrete placement
• Concrete construction joint plan
• Concrete reinforcement shop drawings
• Curing methods
• Concrete bonding agent product data
• Plan for compaction and Flexamat seams
• Contact grouting plan
• Review 3rd party field test results and inspection reports
Task 5 - Requests for Information (RFIs) and Design Modifications
Due to the unique nature of the design and site and the unknowns for the project, additional
engineering is anticipated during the bidding phase. Verdantas has budgeted $3,180 to address
Contractor’s Requests for Information (RFIs) related to the design.
If additional engineering support is needed, Verdantas will provide mutually agreed upon
additional services on a time and material basis.
Assumptions
The work will be conducted in accordance with the following general assumptions:
• All construction submittals, RFIs, and responses will be electronic (in PDF format).
• Avon will lead the construction meetings, including preparation of the agenda and
meeting notes for the construction meetings.
• Verdantas will attend construction meetings in person if they coincide with scheduled
visits.
• Construction will be from April through June 2024. Project closeout will be completed
by the end of October 2024.
DocuSign Envelope ID: 15B09173-3007-479D-82BC-FCD04F68C027
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•Verdantas will participate in virtual meetings with Town engineer as needed to support
construction (up to 10 total hours).
•Avon will contract Special Inspections and testing.
•Up to the equivalent of eight (8) site visits for periodic inspection of the construction.
•Verdantas support of RFIs is limited to a budget of $3,180.
•Invoices will be sent monthly.
•Verdantas will bill at current year rates.
Schedule
The project schedule will be directly related to the Contractor’s construction schedule.
Construction is anticipated from April 2024 through June 2024. Project closeout will be
completed by the end of October 2024. A detailed construction schedule will be available after
the Contractor is selected.
Cost Estimate
Our estimated cost for performing engineering services is summarized in the table below. The
work will be completed on a time and materials basis in accordance with contract terms that
are consistent with recent projects that Verdantas has performed for the Town of Avon.
Task Description Hours Labor
Cost OD
C
Total
Cost
Basin 4 Construction Management
1 Bid Support 10 $2,000 $2,000
2 Project Management and meetings with Town Engineers 18 $3,730 $3,730
3 Site Visits and Construction Meetings 58 $10,604 $1,840 $12,444
4 Construction Submittal Review 32 $6,110 $6,110
5 Requests for Information (RFIs) and Design Modifications 16 $3,180 $3,180
Total Hours 134
Total Proposed Fees $25,624 $1,840 $27,464
DocuSign Envelope ID: 15B09173-3007-479D-82BC-FCD04F68C027
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We look forward to working with the Town of Avon in providing engineering services during
construction (ESDC) for the Basin 4 Sediment Mitigation project. If you have any questions
concerning our proposal, please do not hesitate to contact us.
Sincerely,
Susan Cundiff, P.E., CFM
Senior Project Manager
scundiff@verdantas.com
DocuSign Envelope ID: 15B09173-3007-479D-82BC-FCD04F68C027