PROJECT PORTFOLIO

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Beaver Creek Stream Restoration

Palmyra Stormwater Forebay and Wetlands Design

Restoration of the Cocalico Creek at Autumn Hills

Greenfield North Phase 2

Penn State Health Lancaster Medical Center

Legend™ of Lancaster Site Redevelopment

SR 0056 Bridges and Roadway Rehabilitation

Penn State Greater Allegheny Sports Courts

Renewable Energy

Middlesex County Utilities Authority (MCUA) Solar Field Closeout Evaluation

SR 0611 Bridge Replacement

SR 0722 Bridge Replacement

SR 0038 Bridge Replacement

Thaddeus Stevens College of Technology Master Plan

Chemical Plant 3D/High-Definition Scanning and Modeling

Unnamed Tributary to Beaver Creek Stream Restoration

Greater Mansfield Region Mini-Comprehensive Plan

RETTEW NEWSROOM

Check out our latest updates on industry trends, corporate news, employee accomplishments, and community support.

Leveraging Renewable Natural Gas Solutions for Cost Savings and Efficiency: What Is Biogas?

In today’s clean energy landscape, the concept of the circular bioeconomy has become more significant than any other…

Focus on Funding – September 2026

Explore a bushel of funding opportunities for Pennsylvania communities, from LSA Statewide grants to municipal support programs.