The Betasso Water Treatment Plant Disinfection & Corrosion Control System Improvements project is planned to begin construction soon. The project includes upgrades to the calcium hydroxide (lime), carbon dioxide, and disinfection systems. The project addresses aging assets, regulatory compliance, and adds redundancy to increase operational flexibility. Portions of the construction are scheduled to begin in late 2023, and proceed over four years due to complex construction sequencing.

2024-29 Planned Spending: $15,000,000

2024 Budget: $0, spend in 2026

Estimated Completion Date: 2027

Includes multiple Barker source water rehabilitation projects. The largest is the Barker Gravity line, a 12-mile long pipeline that delivers water from Barker Reservoir in Nederland to Kossler Reservoir, located up Flagstaff Road. The pipeline is over 100 years old and repair and/or replacement is critical to maintain water supply from the Middle Boulder Creek system to the city for treated water demands. The project is scheduled for approximately 1-mile of pipeline segment rehabilitation annually for 12 years, which began in 2017.

2024-29 Planned Spending: $76,510,000

2024 Budget: $19,230,000

Estimated Completion Date: 2028

The main sewer conveys most of the wastewater from the Boulder community to the city's treatment facility. Replacement of the existing pipe will address several key issues including the following: 1) provide a new pipeline with a projected useful life of 75 to 100 years, 2) it will address increased capacity needs to provide a greater level of service to the community by accommodating wet weather flows, and 3) the new pipeline will be located further from Boulder Creek representing a less vulnerable condition from flooding.

2024-29 Planned Spending: $8,000,000

2024 Budget: $0

Previous Approved Budget-to-Date: $58.5M

Estimated Completion Date: Late 2024

The next major capital improvements project at the city’s Water Resource Recovery Facility (WRRF) will target phosphorus removal in preparation for the Regulation 85 total phosphorus limitation that will appear in the city’s next State of Colorado Discharge Permit System (CDPS) Permit update. The city invested significantly over the last 15 years in nitrogen removal to meet current permit limits so, fortunately, the WRRF is already out-performing Regulation 85 nitrogen limitations.

2024-29 Planned Spending: $6,880,000

2024 Budget: $5,500,000

Estimated Completion Date: 2025

A flood mitigation plan for Gregory Canyon Creek identified various improvements, primarily involving replacement of culverts to increase the conveyance capacity of the channel to carry a 10-year storm event. The project has been divided into two phases, and the Phase 1 portion (downstream segment from Pennsylvania to Boulder Creek) has completed the 60% design phase and is planned for construction in 2024.

2024-29 Planned Spending: $11,450,000

2024 Budget: $0, spend in 2027/28

Estimated Completion Date: 2027

This project involves providing 100-yr flood protection to the community along the South Boulder Creek drainageway. The project is currently in the first of three phases. Phase I involves the development of a flood detention facility upstream of highway US 36. The purpose of this detention facility is to provide flood protection for areas north of Hwy 36 including the area known as the West Valley. The project had completed preliminary design and is planned for construction to begin in 2024. Utilities staff is coordinating with numerous regulatory agencies, project stakeholders, and city departments.

2024-29 Planned Spending: $63,000,000

2024 Budget: $0

($63,000,000 in expenses for this project will be appropriated in 2024 outside of the regular budget development, at the time of debt approval for the associated municipal bond)

Estimated Completion Date: 2026