# Planned developments in Columbia County, WA

Boardwalk found 28 planned projects in Columbia County, WA in public filings from the last 12 months, mostly infrastructure. The latest is on the Columbia County Planning and Building Department agenda for Sep 3, 2026.

Data as of Oct 11, 2026. Updated monthly. Page: https://boardwalkai.com/development/washington/columbia/

## Columbia County at a glance

| Measure | Value |
|---|---|
| Projects, last 12 months | 28 |
| New in the last 30 days | 0 |
| Most common type | Infrastructure |
| Latest filing | Sep 3, 2026, Columbia County Planning and Building Department |
| Sources we check | 5 |

Last 12 months, duplicates merged. Includes private, public, and small jobs. How we count: https://boardwalkai.com/coverage/#how-we-count

## What's planned in Columbia County

By type, last 12 months.

| Type | Projects | Share |
|---|---|---|
| Infrastructure | 23 | 82% |
| Commercial | 2 | 7% |
| Development decisions | 2 | 7% |
| Public and institutional | 1 | 4% |

## Recent projects in Columbia County

| Project | Location | Developer | Type | Size | Stage | Latest meeting |
|---|---|---|---|---|---|---|
| $4.5M Tucannon Road Improvement Project | Columbia County, WA | Not stated | Roads and highways | Not stated in filing | Approved | Jul 20, 2026 |
| Kellogg Hollow Road Phase 4 Infrastructure Project | Columbia County, WA | Not stated | Roads and highways | Not stated in filing | Approved | Jun 15, 2026 |
| $3.59M Kellogg-Hollow Phase 4 Road Improvement Project | Columbia County, WA | Not stated | Roads and highways | Not stated in filing | Recommended | Jun 15, 2026 |
| Road Stabilization, 2026 Infrastructure Project | Columbia County, WA | Not stated | Roads and highways | Not stated in filing | Out to bid | Apr 6, 2026 |
| $320K Main Street Multimodal Improvements Design | Dayton, WA | Not stated | Roads and highways | Not stated in filing | In design | Mar 10, 2026 |
| East Grandstands Renovation Engineering and Design Services | Dayton, WA | Not stated | Parks and recreation | Not stated in filing | In design | Mar 5, 2026 |
| Wastewater Treatment Facility Design Funding Agreement | Dayton, WA | Not stated | Sewer and wastewater | Not stated in filing | In design | Feb 10, 2026 |
| $1.25M Touchet River Levee Bicycle/Pedestrian Path Phase 2 | Columbia County, WA | Not stated | Trails and greenways | Not stated in filing | Approved | Nov 17, 2025 |
| $4.2M King Grade Bridge Replacement | Columbia County, WA | Not stated | Bridges | Not stated in filing | Approved | Nov 17, 2025 |
| $3.5M Kellogg Hollow Road Phase 3 Improvement Project | Columbia County, WA | Not stated | Roads and highways | Not stated in filing | Approved | Nov 17, 2025 |
| $740K Bridge Rail Safety Project | Columbia County, WA | Not stated | Bridges | Not stated in filing | Approved | Nov 17, 2025 |
| $509K Tumalum Culvert Replacement Project | Columbia County, WA | Not stated | Stormwater and drainage | Not stated in filing | Approved | Nov 17, 2025 |

Showing 12 of 28 projects. A free trial opens the full records and documents.

Samples show projects filed by companies or public bodies.

## Cities in Columbia County

- Dayton, WA · 2 projects

## Nearby places

- [Garfield County, WA](https://boardwalkai.com/development/washington/garfield/) · 21 projects
- [Asotin County, WA](https://boardwalkai.com/development/washington/asotin/) · 39 projects
- [Walla Walla County, WA](https://boardwalkai.com/development/washington/walla-walla/) · 250+ projects
- [Whitman County, WA](https://boardwalkai.com/development/washington/whitman/) · 150+ projects
- [Franklin County, WA](https://boardwalkai.com/development/washington/franklin/) · 170+ projects
- [Adams County, WA](https://boardwalkai.com/development/washington/adams/) · 120+ projects

All places in Washington: [Washington](https://boardwalkai.com/development/washington/)

## Questions about Columbia County

### What's planned in Columbia County, WA?

Boardwalk found 28 planned projects in Columbia County, WA in the last 12 months, mostly infrastructure. The latest is on the Columbia County Planning and Building Department agenda for Sep 3, 2026.

### Where does this data come from?

Boardwalk's Columbia County projects come from public meeting records, such as Columbia County Planning and Building Department agendas and minutes. Each one links to the original filing.

### How current is it?

Boardwalk checks Columbia County's public records at least once a week; the last check was Oct 11, 2026. These counts are as of Oct 11, 2026 and refresh monthly.

### Can I get an Alert for new Columbia County projects?

Yes, a Boardwalk Alert emails you new Columbia County projects daily, weekly, or monthly. Start with a 7-day free trial, no credit card needed.

## Get the full data

- **Count for free.** Connect Boardwalk to Claude or ChatGPT and ask how many projects match. Counting is free during your trial and on every plan. [Use it in Claude or ChatGPT](https://boardwalkai.com/mcp/)
- **Open the records.** Start a 7-day free trial, no credit card. It includes 50 project records. [Start free trial](https://boardwalkai.com/auth/signup/)
- **Use it in your tools.** CSV export, the API, and the MCP server come with every plan. [API docs](https://boardwalkai.com/docs/api/)
- **Download these numbers.** [columbia.json](https://boardwalkai.com/data/places/washington/columbia.json) · [columbia.md](https://boardwalkai.com/development/washington/columbia/index.md)

## How to cite

Source: Boardwalk, "Planned developments in Columbia County, WA", boardwalkai.com/development/washington/columbia/, data as of Oct 11, 2026.

How we count: https://boardwalkai.com/coverage/#how-we-count