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City Clerk's Office Item # M1
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 BROWN
AND CALDWELL, INC., IN THE AMOUNT OF $434,106 FOR 18-087,
WASTEWATER DEPARTMENT ENGINEER OF RECORD PILOT
PROJECT TO IDENTIFY CONTRIBUTING GROUNDWATER
INFILTRATION AND INFLOW.
SUMMARY:
This Resolution approves Amendment No. 1 to the Professional Consulting Services
Agreement awarded to Brown and Caldwell, Inc. in the amount of $434,106 for Project
No. 18-087, Wastewater Department Engineer of Record Pilot Project to Identify
Contributing Groundwater Infiltration and Inflow.
PREVIOUS COUNCIL ACTION:
On February 12, 2024, the City Council approved Resolution No. 15497, selecting Brown
and Caldwell, Inc as the Engineer of Record for the Wastewater Department.
On November 13, 2023, the City Council approved Ordinance No. 10583 to have Brown
and Caldwell pilot project to identify issues contributing to groundwater infiltration and
BACKGROUND:
The Wastewater Department has been addressing selenium and sulfate issues in the
Arkansas River Basin for more than 25 years. Naturally occurring selenium and sulfate
are known to enter the city sewer collection system through the infiltration and inflow of
groundwater. The sanitary sewer collection system conveys sewage and the
groundwater to the James R. DiIorio Water Reclamation Facility. Approximately 50
percent of the selenium and very little sulfate is removed during the treatment process.
The purpose of this project is to pilot multiple technologies in geographical locations with
groundwater high in selenium and sulfate. These technologies, not previously used by
the Wastewater Department, that can identify and locate sources of groundwater
infiltration and inflow entering the sanitary sewer collection system.
Amendment 1- Brown and Caldwell, Inc will provide design services to address the inflow
and infiltration into the sewer collection system found during the original pilot project
study area. This design will include replacement of laterals, mainline, and manholes. This
work will result in the design and bid phase for the replacement sewers.
FINANCIAL IMPLICATIONS:
The cost of the agreement with Brown and Caldwell to provide design services for the
rehabilitation project will not exceed $434,106. Funds are available from the Sewer User
Fund and have been appropriated to Project No. WW1503-Selenium Reduction.
BOARD/COMMISSION RECOMMENDATION:
Not applicable
STAKEHOLDER PROCESS:
None
ALTERNATIVES:
The no-action alternative will eliminate the opportunity to collect data that identifies where
infiltration and inflow occur in the sanitary sewer collection system. Without this data, it
is unknown how best to rehabilitate the sanitary sewer mains to stop infiltration and inflow
containing selenium and sulfate.
RECOMMENDATION:
Approval of the Resolution
ATTACHMENTS:
1. 05-27-25 18-087 Amendment 1 Pilot Project
RESOLUTION NO. 15990
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 BROWN AND CALDWELL,
INC., IN THE AMOUNT OF $434,106 FOR 18-087,
WASTEWATER DEPARTMENT ENGINEER OF RECORD
PILOT PROJECT TO IDENTIFY CONTRIBUTING
GROUNDWATER INFILTRATION AND INFLOW.
WHEREAS, Project No. 18-087 Wastewater Department Engineer of Record Pilot
Project to Identify Contributing Groundwater Infiltration and Inflow was awarded to Brown and
Caldwell, Inc., on November 13, 2023; and
WHEREAS, additional design and engineering work contemplated 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 Brown and Caldwell, Inc., a California 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 $434,106.
SECTION 2.
Funds in the amount of $434,106 will be paid from WW 1503,
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
