# Planned developments in Mercer County, IL

Boardwalk found 69 planned projects in Mercer County, IL in public filings from the last 12 months. The latest is on the Aledo City Council agenda for Sep 21, 2026.

Data as of Oct 19, 2026. Updated monthly. Page: https://boardwalkai.com/development/illinois/mercer/

## Mercer County at a glance

| Measure | Value |
|---|---|
| Projects, last 12 months | 69 |
| New in the last 30 days | 2 |
| Most common type | Infrastructure |
| Latest filing | Sep 21, 2026, Aledo City Council |
| Sources we check | 1 |

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 Mercer County

By type, last 12 months.

| Type | Projects | Share |
|---|---|---|
| Infrastructure | 32 | 46% |
| Development decisions | 19 | 28% |
| Residential | 13 | 19% |
| Public and institutional | 4 | 6% |
| Commercial | 1 | 1% |

## Recent projects in Mercer County

| Project | Location | Developer | Type | Size | Stage | Latest meeting |
|---|---|---|---|---|---|---|
| East Main Street Reconstruction Grant Application | Aledo, IL | Not stated | Roads and highways | Not stated in filing | Early planning | Sep 21, 2026 |
| Monmouth Transportation Hub Construction | Mercer County, IL | Not stated | Transportation | Not stated in filing | Early planning | Sep 21, 2026 |
| $50K SW 6th Street Safe Routes to School Sidewalk Engineering | Aledo, IL | Not stated | Sidewalks | Not stated in filing | In design | Sep 8, 2026 |
| 3.4 MW AC Commercial Solar Energy Facility on 35 Acres | Mercer County, IL | Mayflower Solar LLC | Power plants | 35 acres | Approved | Aug 3, 2026 |
| TR 225 over Pope Creek Bridge Engineering Agreement | Mercer County, IL | Not stated | Transportation | Not stated in filing | Approved | Jun 24, 2026 |
| Renovation of 211 High Street for Affordable Housing | Windsor, IL | New Windsor Fire Company | Affordable (LIHTC) housing | Not stated in filing | Approved | Jun 13, 2026 |
| Sponsler Manor Fourth Addition Housing Development | Aledo, IL | Not stated | Residential | Not stated in filing | Out to bid | Jun 3, 2026 |
| $6M Wastewater Treatment Enhanced Nutrient Reduction Upgrade | Windsor, IL | Not stated | Sewer and wastewater | Not stated in filing | Approved | Apr 27, 2026 |
| Rivoli Bridge Bid Letting Scheduled for May 13th | Mercer County, IL | Not stated | Bridges | Not stated in filing | Out to bid | Apr 22, 2026 |
| WWTP ENR Upgrade Planning and Design Services | Windsor, IL | Not stated | Utilities | Not stated in filing | In design | Apr 1, 2026 |
| $1.6M Water Main Improvements in Grand Pointe Subdivision | Windsor, IL | Not stated | Pipelines | Not stated in filing | Approved | Mar 25, 2026 |
| Bridge Replacement on CH 4 over Parker Run | Mercer County, IL | Not stated | Bridges | Not stated in filing | In design | Feb 16, 2026 |

Showing 12 of 69 projects. A free trial opens the full records and documents.

Samples show projects filed by companies or public bodies.

## Cities in Mercer County

- [Windsor, IL](https://boardwalkai.com/development/illinois/windsor/) · 25 projects
- Aledo, IL · 16 projects
- Joy, IL · 5 projects
- Alexis, IL · 3 projects
- Keithsburg, IL · 2 projects
- Matherville, IL · 2 projects
- Preemption, IL · 1 project
- Sherrard, IL · 1 project
- New Boston, IL · Checked, no projects in 12 months
- Viola, IL · Checked, no projects in 12 months

## Nearby places

- [Rock Island County, IL](https://boardwalkai.com/development/illinois/rock-island/) · 460+ projects
- Warren County, IL · 19 projects
- Henderson County, IL · 18 projects
- [Knox County, IL](https://boardwalkai.com/development/illinois/knox/) · 140+ projects
- [Henry County, IL](https://boardwalkai.com/development/illinois/henry/) · 320+ projects
- [Stark County, IL](https://boardwalkai.com/development/illinois/stark/) · 36 projects

All places in Illinois: [Illinois](https://boardwalkai.com/development/illinois/)

## Questions about Mercer County

### What's planned in Mercer County, IL?

Boardwalk found 69 planned projects in Mercer County, IL in the last 12 months. The latest is on the Aledo City Council agenda for Sep 21, 2026.

### Where does this data come from?

Boardwalk's Mercer County projects come from public meeting records, such as Aledo City Council agendas and minutes. Each one links to the original filing.

### How current is it?

Boardwalk checks Mercer County's public records at least once a week; the last check was Oct 18, 2026. These counts are as of Oct 19, 2026 and refresh monthly.

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

Yes, a Boardwalk Alert emails you new Mercer 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.** [mercer.json](https://boardwalkai.com/data/places/illinois/mercer.json) · [mercer.md](https://boardwalkai.com/development/illinois/mercer/index.md)

## How to cite

Source: Boardwalk, "Planned developments in Mercer County, IL", boardwalkai.com/development/illinois/mercer/, data as of Oct 19, 2026.

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