About this opportunity
AI summaryThe City of Chelsea seeks proposals for combined sewer overflows (CSO) monitoring and measurement services. The selected contractor must deliver continuous 24/7 monitoring across three CSO locations to detect overflow activations, install equipment at weir walls without permanent site power, and deploy a live rain gauge within city limits. Additional responsibilities include data quality assurance, hosting information on a web-based platform, calculating CSO activations, providing monthly reports, and completing installation within 30 calendar days of the notice to proceed. Eligibility is restricted to onshore U.S. organizations. Responders must digitally submit their technical proposal alongside required certifications, a W-9 form, and three qualifying contract references, while enclosing the price proposal in a separate sealed envelope. The question submission deadline is November 11, 2026. The City will evaluate submissions based on established criteria and price, awarding a one-year contract to the responsive and responsible proposer offering the most advantageous proposal.
Buyer and opportunity details
- Client
- City of Chelsea, MA
- Solicitation No.
- 2027-282
Scope of work
- Continuous 24/7 monitoring at all three CSO locations to detect initiation of CSO overflow events
- Installation of level, depth, flow, velocity, and/or pressure monitors at weir walls
- Installation of a live rain gauge within city limits on public or city-owned property
- On-site measurements for pipe geometry and slopes without relying on as-built drawings
- Wireless data transmission through cellular modems and hosting near real-time data on a web-based platform
- System maintenance achieving a monitoring system uptime of 95% or greater
- Public notification within 2 hours of suspected CSO event initiation and cessation
- Monthly flow monitoring reports by the 10th day of the following month for regulatory reporting
How proposals are evaluated
| Criterion | Weight / scoring |
|---|---|
| Comparative Evaluation Criteria / Technical Proposal | Not specified |
| Key Personnel and Prior Experience | Not specified |
| Price | Not specified |
Minimum qualifications
- Minimum 5 years of experience with installing and maintaining CSO flow monitoring equipment
- Experience with similar monitoring data and overflow calculations
- Experience with web hosting of near real time and historic flow monitoring data
- Data Analyst with a minimum of 5 years of experience performing data analysis and reporting
- Ability to provide notification of potential overflow initiation to at least two points of contact
Documents to include with your response
- Responder Information Form
- Technical Proposal
- Certificate of Non-Collusion
- Signature Authority Certification
- Tax Compliance Certification
- Wage Theft Certification
- Living Wage Certification
- W-9 Taxpayer Identification Number
- Reference Form with three current contract references
- Price Proposal Form and Price Proposal
Key dates
- RFP available
- November 5, 2026
- Questions due
- November 11, 2026
- Proposals due
- November 19, 2026 at 10:30 AM
How to submit
- Method
- Sealed hard copy
- Instructions
- Submitted to the Office of the Chief Procurement Officer, City Hall, 500 Broadway, Room 204, Chelsea, MA 02150. Clearly marked CSO MONITORING AND MEASUREMENT. Price Proposal Form and Price Proposal must be in a separate sealed envelope.
Contract details
- Term
- one year
- Place of performance
- Chelsea, MA
- Insurance and bonding
- Commercial General Liability of $2,000,000 aggregate; Automobile Liability of $500,000 per person and $1,000,000 per occurrence; Worker's Compensation insurance as required by Massachusetts Law; Contractor's Equipment Coverage on an All Risks basis. City of Chelsea named as Additional Insured with waiver of subrogation.