Bainbridge Island, Washington: water and wastewater capital improvement projects
24 line items · $31M · starting 2026–2029 · 1 plan
Bainbridge Island's published capital plans list 24 water, sewer and wastewater line items with a combined planning budget of $31M, of which 16 items worth $14M sit in the wastewater and sewer departments. The largest single item is Winslow Water Tank Replacement at $11M (2025–2026). The ten largest items are listed below; the full list with descriptions and page references is in Klarifi.
A capital improvement plan (CIP) is a city’s multi-year budget for building and replacing infrastructure. The water, sewer and wastewater sections list each project with its budget and the years it is funded, which makes them the earliest public signal that a plant, pump station or pipe network is about to be upgraded, usually two to four years before a contract is awarded.
The largest water and sewer projects in Bainbridge Island
| # | Project | Department | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Winslow Water Tank Replacement | Water Supply | Storage tanks and reservoirs | $11M | 2025–2026 |
| 2 | Pump Station & Force Main | Sewer | Pump stations | $3M | 2025 |
| 3 | WWTP Clarifier/Drain Pump/Fine Screen | Wastewater | Clarifiers and settling | $3M | 2027–2028 |
| 4 | Relocate Pump Station | Sewer | Pump stations | $2M | 2027 |
| 5 | Winslow Supply Well | Water Supply | Wells and groundwater | $2M | 2027 |
| 6 | Winslow Water System Coordination and Redundancy Projects | Water Supply | — | $2M | 2029–2030 |
| 7 | Install Gravity Sewers | Sewer | Sewer rehabilitation and I&I | $1M | 2025 |
| 8 | Wastewater Treatment Plant Capacity (WWTP) Upgrades | Wastewater | Wastewater treatment plant upgrades | $1M | 2025 |
| 9 | Wing Point Drive Water Line Upgrade | Water Distribution | Water mains and distribution | $950K | 2026–2027 |
| 10 | Japanese American Exclusion Memorial Water Extension | Water Distribution | Water mains and distribution | $900K | 2025 |
14 more line items in Bainbridge Island, with descriptions and contacts
Klarifi holds every Bainbridge Island line item with its description, the page it appears on and the source document. Track new plans as they are adopted and compare with similar projects in other cities.
Planned spend by start year
Before 2026
$19M
9 items
2026
$2M
3 items
2027
$8M
10 items
2028
$210K
1 items
2029
$2M
1 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 5 | $5M | 17% |
| Sewer | 11 | $8M | 27% |
| Water Supply | 5 | $15M | 48% |
| Water Distribution | 3 | $2M | 8% |
Project types in Bainbridge Island's plan
Wastewater treatment plants in Bainbridge Island
1 publicly owned treatment plant in Bainbridge Island with 1 permit violations in the last three years. Each profile shows flow, permit, technology and compliance data.
| Plant | Avg flow (MGD) | NPDES | Violations (3y) |
|---|---|---|---|
| Bainbridge Island WWTP | — | WAG994558 | 1 |
Other Washington cities with capital plans
Bainbridge Island capital plan questions
Sources and methodology
Budgets and years are as published in Bainbridge Island’s capital improvement plan or adopted budget. Klarifi extracts the water, sewer and wastewater line items from the published document, keeps the page reference for each one, and assigns a project type from the title and description with a keyword classifier. Figures are planning budgets, not awarded contracts, and can change when a plan is re-adopted.
Documents: CIP 2025–2030 (24 line items).
Data refreshed September 11, 2026.