1. US Army Corps of Engineers BUILDING STRONG ® Inner Harbor Navigation Canal Lock 2016 Dewatering Marine Industry Day USACE - New Orleans District 20 May 2016

2. Agenda  IHNC Lock overview, history, current condition  Dewatering scope of work  Dewatering sequence and schedule  Constraints: River stage, hurricane season, availability of Baptiste Collette Alternate Route  Contingency plans 2

3. BUILDING STRONG ® IHNC Lock Overview  Sole access from Mississippi River to eastern GIWW  640 ft. long x 75 ft. wide x 31.5 ft. deep  Averages 10,000 lockages and 16M tons of cargo annually 3

4. BUILDING STRONG ® IHNC Lock History  Constructed by Port of New Orleans 1918-1921 to provide access between Lake Pontchartrain and the Mississippi River  Assumed into the Federal, GIWW project in 1944  Leased by the Corps from the Port from 1947-1985; purchased in fee from the Port in 1985 4

5. BUILDING STRONG ® IHNC Lock – Vicinity Map 5

6. BUILDING STRONG ® 95-year old miter gates in state of failure - passing ~80 cfs during high water Current conditions: Miter Gates 6

7. BUILDING STRONG ® Original 52 HP electric motor and reduction gear Current Conditions: Gate machinery 7

8. BUILDING STRONG ® Electric motor patent plate: Dated February 1911 Current Conditions: Gate machinery 8

9. BUILDING STRONG ® Failed Bull Gear – January 2014 9

10. BUILDING STRONG ® Concrete Damage at Strut Arm Opening January 2014 10

11. BUILDING STRONG ® Emergency Repairs – January 2014 IHNC lock closed 11 days for repair of failed bull gear 11

12. BUILDING STRONG ® IHNC Lock Dewatering 2016  Scope of Work ► Replace 4 main operating miter gates, hinges and seals, and original electrical/mechanical gate operating machinery with new hydraulic machinery; replace sluice valve seal strips ► Sequence of work requires 4 separate dewaterings of the lock chamber ► Estimated 120-day duration, commencing on or about 1 Aug 16 12

13. BUILDING STRONG ® IHNC Lock Dewatering 2016 Sequence of work within low water window 13 Dewatering may only occur when river levels are below 6-ft. on Carrollton gage due to uplift of the lock chamber (Aug to Dec timeframe). Schedule coincides with Hurricane Season

14. BUILDING STRONG ® IHNC Lock Dewatering 2016 Miter gate configuration 14

15. BUILDING STRONG ® 15

16. BUILDING STRONG ® IHNC Lock Dewatering 2016 Upper hinge turnbuckles being machined at Acme Machine, Franklinton, LA 16

17. BUILDING STRONG ® IHNC Lock Dewatering 2016 Gate operating hydraulic machinery under assembly at Hydradyne, Harvey, LA 17

18. BUILDING STRONG ® IHNC Lock Dewatering 2016  MVD Regional Resources ► MVN Floating maintenance Units A, B & C Shops Section Crafts/trades from Operations Division field sites ► MVR Heavy lift floating derrick “Quad Cities” and crew ► MVS Expert technical assistance to tension and adjust new miter gates 18

19. BUILDING STRONG ® IHNC Lock Dewatering 2016  Constraints ► Dewatering may only occur when river levels are below 6-ft. on Carrollton gage due to uplift of the lock chamber (Aug to Dec timeframe). Dewatering schedule coincides with Hurricane Season ► Alternate route through Breton Sound, via Baptiste Collette currently shoaled in: controlling depth < 8-ft. Funding secured to provide 12-ft. X 200-ft. channel for GIWW barge traffic US Coast Guard to mark alternate route across open water reaches 19

20. BUILDING STRONG ® GIWW – Baptiste Collette Alternate Route 20

21. BUILDING STRONG ® 21 GIWW - Alternate Route absent Baptiste Collette

22. BUILDING STRONG ® IHNC Lock Dewatering 2016  Contingency plans for late high river and/or interruption of work by hurricanes ► Scenario 1: River recedes by 1-31 Aug: Perform full scope of work ► Scenario 2: River recedes not before 1 Sep, or work interrupted by hurricanes: Replace canal end gates and operating machinery for all 4 gates (70 day work duration) Defer river end gate replacement to 2017 low water (60 day work duration) ► Scenario 3: River remains >6 ft. beyond 30 Sep Defer dewatering to 2017 low water Hurricane contingencies include USCG approved mooring plan for floating plant to be secured within the IHNC - Regulated Navigation Area. 22

23. BUILDING STRONG ® 23 DISCUSSION

24. BUILDING STRONG ® Refrigerated Poultry Vessel, “Chicken Ship” transiting IHNC lock 24