Welcome to Center for Dirt and Gravel Road Studies

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What's New

Updated: Driving Surface Aggregate (DSA) Handbook

The updated handbook includes the Aggregates 101 Technical Bulletin released...

DGLVR GIS Error Cutoff Values for Project Deliverables

The current cutoff values for project deliverables. Helps indicate potential...

Updated: ESM Eligibility List

List of attendees from past trainings. Townships in PA are required to have...

Updated: Approved Products List

Visit the Products page to download the updated...

Upcoming Events

Jan 26
Online ESM Training
Visit the ESM Course page for detailed information and to register...
Jan 28
Online CD Administrative Training
Visit the Conservation District Administrative Training page for...
Feb 11
Webinar: Stream Crossings, the Good, the Bad, and the Ugly
Visit the Webinars page for detailed information.
Feb 16
Online ESM Training
Visit the ESM Course page for detailed information and to register...

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