Combined Sewer Overflow Flow Metering Services

The City of Lewiston is seeking proposals for contractor-owned flow meters and overflow sensors at eight combined sewer overflow outfalls, wireless rain-gauge monitoring at four sites, and secure real-time data and alarm services under a three-year contract with three one-year renewal options.

City of Lewiston > Department of Public Works


General
Closed (past due)
2026-049
Sep 09, 2026 02:00 PM
Aug 18, 2026 12:00 AM
3 years base + 3 × 1 year options
Request for Proposal (RFP)
Local
Ask AI about this solicitation
Original Solicitation Links
Contact
award@lewistonmaine.gov
+12075133040
27 Pine Street, Lewiston, ME, USA
Submission Instructions
Mail
Deputy Director of Budget & Purchasing, City Hall, 27 Pine St., Lewiston, ME 04240
Description

The City of Lewiston is soliciting proposals for contractor-owned, installed, programmed, calibrated, maintained, and repaired flow-metering equipment at eight combined sewer overflow outfall locations. Each system must include a data logger, pressure sensor, ultrasonic sensor, overflow-pipe level-velocity sensor, and integrated wireless communications. The system must provide five-minute depth, velocity, and flow-rate data, daily total flow volume, secure web-based access for the City and contractor, and near-real-time overflow alarms by email or text. The contractor must provide monthly and as-needed service visits, traffic control, battery replacement, and at least 95% continuous metering uptime. The scope also includes installation and maintenance of four wireless rain gauges and an on-site visit to assess the needs and logistics of each site. The modified Proposal Form requires pricing for flow meters, overflow-pipe sensors, wireless communications, and rain gauges. The proposal must include a proposal letter of fewer than eight pages addressing company qualifications and similar-project references, proposed equipment data sheets, project-team qualifications, subcontractor information, temporary metering capability with two weeks' notice, and other evaluation factors.

Classification Codes
NAICS334513Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
PSC6680Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments
Smart Codes
sewer flow meteringrain gauge monitoringwireless data monitoring
Specifications
Supply & Service
No
Timeline
Aug 18, 2026-Publication Date
Sep 9, 2026-Proposal Due Date and Public Opening (optional)
Sealed proposals are due by 2:00 p.m. and will be publicly opened and read aloud; bid opening information references the Administrative Conference Room/Teams Meeting.
Sep 14, 2026-Finance Committee Approval
Sep 15, 2026-Contract Execution
Oct 1, 2026-Flow Meter Installation Deadline and Contract Start
Requirements
Scored
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