E2. Inflow and Infiltration Project Bid RecommendationCITY OF
KALISPELL
MEMORANDUM
To: Jarod Nygren, Interim City Manager
Cc: Susie Turner, PE — Public Works Director
From: Keith Haskins, PE — City Engineer / Deputy Public Works Director
Re: 2025 Inflow and Infiltration Mitigation Project
Meeting Date: November 17, 2025
BACKGROUND: The City of Kalispell has identified several areas in the sewer collection
system that have root intrusion and infiltration issues. These areas require increased maintenance
efforts by the sewer division staff and contribute groundwater flows to the Wastewater
Treatment Plant. This project includes furnishing labor, materials, and equipment required to
rehabilitate approximately 7,650 linear feet of existing sanitary sewer main, ranging from 8" to
12" diameter and 207 vertical feet of manhole lining. The project Base Bid & Additive
Alternates were broken out as follows.
• Base Bid - 3rd Alley W - Center to 5th St
• Additive Alternate A
- 4th Alley E - 5th St to 1 Ith St
• Additive Alternate B -
6th Alley W - 2nd St to 6th St
• Additive Alternate C -
Storm Addition E/W Alleys
• Additive Alternate D
- Storm Addition N/S Alley
This project was previously bid and awarded in December of 2024 for $424,837.50.
Unfortunately, the contract was terminated for cause in October of this year due to no progress
on the project.
BIDDING RESULTS: Bids were received and opened on November 6, 2025, at 3:00 pm. A
summary of the bids received are provided below.
Bidder
Base Bid
Add Alt A
Add Alt B
Add Alt C
Add Alt D
Total
Vortex
$185,995.00
$202,995.00
$165,720.00
$141,995.00
$146,290.00
$842,995.00
Services
Insituform
$190,658.00
$186,953.00
$149,964.00
$103,194.00
$145,359.00
$776,128.00
Technologies
Allied
Trenchless
$235,210.00
$261,660.00
$202,230.00
$177,020.00
$172,305.00
$1,048,425.00
National
Power
Rodding
$245,470.00
$186,454.00
$143,858.00
$156,256.00
$107,769.00
$839,807.00
Corp.
Engineer's
$211,245.00
$255,540.90
$198,470.00
$174,340.80
$176,347.90
$1,015,945.00
Estimate
Page 1 of 2
Insituform Technologies submitted the lowest bid total for the Base Bid and Additive Alternates
A through D. References for Insituform Technologies were reviewed and have been confirmed to
meet the experience requirements for projects of similar size and scope.
FISCAL EFFECTS: FY 26 Sewer Funds allocated $881,231.00 to support the 2025 Inflow and
Infiltration Mitigation Project as shown in Sewer Fund line item 9 5310-454-430630-962 and
remaining SLIPA Grant funding from House Bill 355 which will be utilized first.
ACTION REQUESTED: Motion to award the Base Bid and Additive Alternates A through D
of the 2025 Inflow and Infiltration Project to Insituform Technologies for $776,128.00.
ALTERNATIVES: As suggested and approved by the City Council.
ATTACHMENTS: 2025 Inflow & Infiltration Mitigation Project Bid Tabulation
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