Maintenance and Operations Cleaning Trash Rack Debris. Brush Cutting. Beaver Burrow in the Levee Prism. Removing Beaver Burrow in the Levee Prism. Removing Beaver Burrow in the Levee Prism. Repairing Levee. Repairing Levee. Repairing Levee. Envasive Weed Control. Pump Maintenance. Tree Removal.