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City Clerk's Office Item # M3
Background Paper for Proposed
Resolution
COUNCIL MEETING DATE: May 27, 2025
TO: President Mark Aliff and Members of City Council
CC: Mayor Heather Graham
VIA: Marisa Stoller, City Clerk
FROM: Andra Ahrens, Director Wastewater
SUBJECT: A RESOLUTION APPROVING AND AUTHORIZING THE PURCHASING
AGENT TO EXECUTE AMENDMENT NO. 1 TO THE AGREEMENT FOR
PROFESSIONAL CONSULTING SERVICES BETWEEN THE CITY OF
PUEBLO, A COLORADO MUNICIPAL CORPORATION, AND ARCADIS
U.S., INC. IN THE AMOUNT OF $33,000 FOR PROJECT NO. 23A-055-
CLARIFIER STABILITY AND GROUNDWATER RELEASE EVALUATION
AND AUTHORIZING THE PURCHASING AGENT TO EXECUTE SAME.
SUMMARY:
This Resolution approves Amendment No. 1 to the Professional Consulting Services
Agreement awarded to Arcadis U.S., Inc.in the amount of $33,000 for Project No. 23a-
055-Clarifier Stability and Groundwater Release Evaluation.
PREVIOUS COUNCIL ACTION:
On December 18, 2023, the City Council approved Ordinance No. 10609 to have Arcadis
U.S., Inc. perform a hydrogeologic and geotechnical study of the groundwater at the
water reclamation facility.
BACKGROUND:
This study will provide information on how the groundwater interacts with the Arkansas
River and the stability of the three secondary clarifiers if the groundwater is pumped from
beneath the clarifiers. This study will provide information to the Colorado Department of
Public Health and the Environment on the conductivity between the groundwater under
the clarifiers and the Arkansas River. This evaluation will also inform the stability of the
existing clarifiers, and the geotechnical information needed for new clarifiers to be built.
Amendment 1- Arcadis U.S., Inc. will do additional study to status update and post-lining
water quality evaluation, to be submitted to CDPHE in August 2025. Previous updates in
2022 and 2023 have included an evaluation of the effectiveness of sewer system
improvement projects completed by the City in reducing selenium and sulfate
concentrations in water reclamation facility influent and effluent.
FINANCIAL IMPLICATIONS:
The cost of the agreement with Arcadis U.S., Inc. to provide services for the study will
not exceed $33,000. Funds are available from the Sewer User Fund in the WRF
Professional Services Account.
BOARD/COMMISSION RECOMMENDATION:
Not applicable
STAKEHOLDER PROCESS:
None
ALTERNATIVES:
The no-action alternative would cause the WRF to be in non-compliance with the DSV
requirements.
RECOMMENDATION:
Approval of the Resolution
ATTACHMENTS:
1. 05-27-25 I and I Pilot Project Amendment 1 Res ML
RESOLUTION NO. 15992
A RESOLUTION APPROVING AND AUTHORIZING THE
PURCHASING AGENT TO EXECUTE AMENDMENT NO. 1 TO
THE AGREEMENT FOR PROFESSIONAL CONSULTING
SERVICES BETWEEN THE CITY OF PUEBLO, A COLORADO
MUNICIPAL CORPORATION, AND ARCADIS U.S., INC. IN THE
AMOUNT OF $33,000 FOR PROJECT NO. 23A-055-CLARIFIER
STABILITY AND GROUNDWATER RELEASE EVALUATION AND
AUTHORIZING THE PURCHASING AGENT TO EXECUTE SAME
WHEREAS, Project No. 253a-055 Clarifier Stability and Groundwater Release Evaluation
was awarded to Arcadis U.S., Inc., on December 18, 2023; and
WHEREAS, additional study and evaluation by Amendment No. 1 is needed; and
WHEREAS, it is in the best interest of the City to proceed with and complete such design
in the manner herein provided; NOW, THEREFORE,
BE IT RESOLVED BY THE CITY COUNCIL OF PUEBLO, that
SECTION 1.
The Amendment No. 1, by and between the City of Pueblo, a Colorado Municipal
Corporation, and Arcadis U.S., Inc. a Delaware Corporation, a copy of which is attached hereto,
having been approved as to form by the City Attorney, is hereby approved, and City Council
authorizes the additional work contemplated by Amendment No. 1 to be performed in the amount
of $33,000.
SECTION 2.
Funds in the amount of $33,000 will be paid from the sewer user fund account WRF
Professional Services,
SECTION 3.
The Purchasing Agent is hereby authorized to execute Amendment No. 1 on behalf of the
City of Pueblo, a Colorado Municipal Corporation, and the City Clerk shall affix the seal of the City
thereto and attest the same.
SECTION 4.
The officers of the City are authorized to perform any and all acts consistent with this
Resolution to implement the policies and procedures described herein.
SECTION 5.
This Resolution shall become effective immediately upon passage and approval.
INTRODUCED: May 27, 2025
BY: Brett Boston
MEMBER OF CITY COUNCIL
APPROVED: __________________________
PRESIDENT OF CITY COUNCIL
ATTESTED BY: ________________________
CITY CLERK
