GRA is the leader in fish passage remediation.

When the passage of fish is interrupted by rockfall, GRA can mobilize specialist tool sets developed over 10 years of fish passage remediation. Whether it’s hydraulic rams/splitters, low or high velocity blasting, or pneumatic air bags, GRA has methods to reestablish fish passage in the most difficult locations. GRA is the first to be called by government, private, and environmental groups when this work is being considered.