Walla Walla, Washington: water and wastewater capital improvement projects
40 line items · $50M · starting 2026–2030 · 1 plan
Walla Walla's published capital plans list 40 water, sewer and wastewater line items with a combined planning budget of $50M, of which 10 items worth $27M sit in the wastewater and sewer departments. The largest single item is Sewer Main Replacement Project at $11M (2025–2030). 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 Walla Walla
| # | Project | Department | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Sewer Main Replacement Project | Sewer | Sewer rehabilitation and I&I | $11M | 2025–2030 |
| 2 | WWTP - Phase 2 Digester Upgrade | Wastewater | Anaerobic digesters and biogas | $10M | 2024–2026 |
| 3 | WWTP - Phase 3 Plant Upgrade Project | Wastewater | Wastewater treatment plant upgrades | $4M | 2025–2027 |
| 4 | Well 5 Conversion to ASR Well | Water Supply | Wells and groundwater | $3M | 2027–2028 |
| 5 | Solar Panels and back-up battery | Water Supply | Generators, power and electrical | $3M | 2024–2025 |
| 6 | Intake Dam - Sediment Pass Through Gate | Water Supply | Headworks, screening and grit | $3M | 2024–2026 |
| 7 | Home-Chestnut Water Main Replacement Project | Water Distribution | Water mains and distribution | $1M | 2027–2028 |
| 8 | Locust-Chestnut Water Main Replacement Project | Water Distribution | Water mains and distribution | $1M | 2030 |
| 9 | Sumach-Touchet-Tukannon Water Main Replacement Project | Water Distribution | Water mains and distribution | $1M | 2029–2030 |
| 10 | Trunk Sewer CIPP Project | Sewer | Force mains and interceptors | $1M | 2024–2025 |
30 more line items in Walla Walla, with descriptions and contacts
Klarifi holds every Walla Walla line item with its description, the page it appears on and the source document, plus 2 verified contacts at the city’s treatment plants. Track new plans as they are adopted and compare with similar projects in other cities.
Planned spend by start year
Before 2026
$35M
13 items
2026
$3M
9 items
2027
$6M
6 items
2028
$2M
5 items
2029
$1M
2 items
2030
$3M
5 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 7 | $15M | 29% |
| Sewer | 3 | $12M | 25% |
| Water Supply | 20 | $17M | 34% |
| Water Distribution | 10 | $6M | 12% |
Project types in Walla Walla's plan
Wastewater treatment plants in Walla Walla
1 publicly owned treatment plant in Walla Walla with 19 permit violations in the last three years. Each profile shows flow, permit, technology and compliance data.
| Plant | Avg flow (MGD) | NPDES | Violations (3y) |
|---|---|---|---|
| Walla Walla Water Reclamation Facility | — | WA0024627 | 19 |
Other Washington cities with capital plans
Walla Walla capital plan questions
Sources and methodology
Budgets and years are as published in Walla Walla’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 (40 line items).
Data refreshed September 11, 2026.