1. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District U.S. ARMY CORPS OF ENGINEERS MOBILE DISTRICT TENNESSEE-TOMBIGBEE WATERWAY

2. Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District WHITTEN LOCK CULVERT REPAIR – AUG 2001 (PREPLACED-AGGREGATE CONCRETE) JAMIE WHITTEN LOCK AND DAM

3. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District JAMIE WHITTEN LOCK & DAM (Originally: Bay Springs Lock & Dam) Lock Chamber: 600 feet by 110 feet / 84-foot lift Culvert Filling/Emptying System: Bottom Longitudinal Floor Culvert System (Commonly referred to as “H” or “Tuning Fork” system) System consists of 10-port intake manifolds on either lock wall from which the flow transitions to 14’ X 14’ culverts

4. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District Reverse-tainter valves control filling and emptying flows Dual 12-inch diameter ducts are provided to introduce air downstream of each filling/emptying valve Crossover culvert vertically splits the flow for each half of the chamber with a horizontal splitter plate in each main culvert Flow then splits horizontally to feed the two 10-port manifolds in each half of the chamber Continued

5. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

6. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District CONCRETE EROSION IN CULVERT FILLING/EMPTYING SYSTEM Location: Roof of culvert at/near monolith joint between lock wall and crossover (lock floor) Description: Eroded area was on the ceiling above horizontal splitter and extended the full width (20 feet at monolith joint) of the culvert and approximately 13 feet inward along the centerline. Depth of concrete erosion varied from 18 inches to 2 inches and the waterstop associated with subject monolith joint was either missing or damaged beyond repair. Reinforcing steel (#11 and #7) was missing or exposed.

7. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

8. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

9. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

10. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

11. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

12. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

13. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District REPAIR PROCEDURE Prepare eroded area for placement of aggregate containment mesh – sawcut and contour Replace damaged waterstop Replace missing/damaged reinforcing steel Anchor welded-steel mesh in area of erosion to provide containment for preplaced-aggregate Load preplaced-aggregate into containment Erect plywood forms Pump high-strength/non-shrink grout (MasterFlow 928) to fill voids within aggregate

14. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

15. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

16. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

17. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

18. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

19. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

20. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

21. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

22. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

23. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

24. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District PERIODIC UNDERWATER INSPECTIONS Method: Underwater “ROV” Frequency: Every 3 to 6 months Data Collected: Digital video with sound (DVD) Current Status of Repair: Most recent inspection in February 2006 revealed only minor deterioration

25. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District UNDERWATER “ROV” Model: VideoRay Pro III (VideoRay LLC - Exton, PA) Depth Rating: 500 feet Speed: 2.5 knots, upgradeable to 4.0 knots Video Recording: Digital Accessories: Digital scanning sonar (Tritech), depth / compass readouts, mini-gripper Other available accessories: Positioning devices, metal and paint thickness measuring instruments, laser measuring devices

26. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

27. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

28. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

29. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District

30. TENNESSEE-TOMBIGBEE WATERWAY Navigation – Recreation – Wildlife Mitigation US Army Corps of Engineers Mobile District