Lake Oswego, Oregon: water and wastewater capital improvement projects
30 line items · $45M · starting 2026–2030 · 1 plan
Lake Oswego's published capital plans list 30 water, sewer and wastewater line items with a combined planning budget of $45M, of which 15 items worth $20M sit in the wastewater and sewer departments. The largest single item is Bergis Water Reservoir Replacement (S-07) at $7M (2026–2027). 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 Lake Oswego
| # | Project | Department | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Bergis Water Reservoir Replacement (S-07) | Water Supply | Storage tanks and reservoirs | $7M | 2026–2027 |
| 2 | McVey Pump Station Replacement (P-01) (WO 340) | Sewer | Pump stations | $6M | 2025–2026 |
| 3 | Wastewater Conveyance Rehabilitation | Sewer | — | $4M | 2026–2031 |
| 4 | Bryant Woods Water System Improvements | Water Supply | Water mains and distribution | $3M | 2026–2027 |
| 5 | Foothills Road Interceptor (T-L1-1) | Sewer | Force mains and interceptors | $3M | 2027–2029 |
| 6 | Forest Highlands 1 Reservoir Replacement | Water Supply | Storage tanks and reservoirs | $3M | 2029–2030 |
| 7 | Forest Highlands Pressure Zone Improvements Phase 1 (F-03) | Water Supply | — | $3M | 2030–2031 |
| 8 | Cornell Water Main Upgrade (R-05)(F-04) | Water Distribution | Water mains and distribution | $3M | 2025–2027 |
| 9 | Pipe Capacity Improvements (D-03) | Water Distribution | — | $3M | 2028–2029 |
| 10 | Blue Heron Trunk (T-BH-1) | Sewer | — | $2M | 2029–2031 |
20 more line items in Lake Oswego, with descriptions and contacts
Klarifi holds every Lake Oswego line item with its description, the page it appears on and the source document, plus 3 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
$9M
8 items
2026
$14M
7 items
2027
$5M
5 items
2028
$3M
2 items
2029
$8M
4 items
2030
$6M
4 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Sewer | 15 | $20M | 44% |
| Water Supply | 13 | $20M | 45% |
| Water Distribution | 2 | $5M | 11% |
Project types in Lake Oswego's plan
Wastewater treatment plants in Lake Oswego
1 publicly owned treatment plant in Lake Oswego with 2 permit violations in the last three years. Each profile shows flow, permit, technology and compliance data.
| Plant | Avg flow (MGD) | NPDES | Violations (3y) |
|---|---|---|---|
| Tryon Creek WWTP | 3.51 | OR0026891 | 2 |
Other Oregon cities with capital plans
Lake Oswego capital plan questions
Sources and methodology
Budgets and years are as published in Lake Oswego’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 2025–2031 (30 line items).
Data refreshed September 11, 2026.