1.  1 Stormwater Management and Road Tunnel A “SMART” Solution Transportation Research Board Committee ADC60 Sustainable and Resilient Infrastructure Workshop Randall J. Essex, P.E., Executive Vice President

2.  2 World’s Largest Flood Control Tunnel Malaysia is one of the world’s fastest-growing economies. Its capital, Kuala Lumpur (KL), has been the powerhouse of this growth

3.  3 But monsoon rains have created severe flooding and devastating destruction for decades World’s Largest Flood Control Tunnel

4.  4 Initial Challenge: Divert the Flooding Intercept upper river, and convey flows under city to lower river (blue) During dry periods, use central third of tunnel to convey traffic (red) Upper River Lower River

5.  5 Discovery Channel Special: “Extreme Engineering”

6.  6 Major Hydraulic Components Upstream water diversion structure and holding pond Inlet structure North Junction gates Downstream detention pond South Junction gates and pump station Downstream diversion structure

7.  7 Physical Hydraulic Features  Storage, surge shafts, and pumping

8.  8 Gatehouses

9.  9 Hydraulic Operation NO STORM

10.  10 Hydraulic Operation NO STORM MOST STORMS (7-10/YR)

11.  11 Roadway Tunnel Operation MAJOR STORMS (2 EVERY 5 YRS) NO STORM MOST STORMS (7-10/YR)

12.  12 World’s First Bored Double- Deck Roadway Tunnel  1.9-mile highway tunnel – Upper and lower decks – 2 x 11 ft lanes – Emergency lane  Design speed 40 mph – Indicated speed 35 mph – 800 ft curve radius  Headroom 8.2 ft – Cars only – 10 MW fire load  Electrical/Systems – full submergence

13.  13 Flood water entrance Video of Tunnel Flooding Maximum diversion capacity: 280 m 3 /sec = 4.4 M gals/min)

14.  14 Bored Tunnels  Twin 43 ft diameter TBMs  Pressurized face slurry shields  One-pass bolted and gasketed segmental lining

15.  15 Bored Tunnels  Twin 43 ft diameter TBMs  Pressurized face slurry shields  One-pass bolted and gasketed segmental lining

16.  16 Bored Tunnels  Twin 43 ft diameter TBMs  Pressurized face slurry shields  One-pass bolted and gasketed segmental lining  Mined total of 6.5 miles in two directions from single slot trench workers

17.  17 Construction

18.  18 Construction

19.  19 Toll Plaza

20.  20 Entrance Ramp

21.  21 Lower Roadway Deck

22.  22 Upper Roadway Deck

23.  23 Exit Ramp

24.  24 22 1 Current Use

25.  25 Client Satisfaction “With SMART under our belt we can be confident that we’ll be ready when a big flood arrives” Contractor: MMC/ Gamuda JV Engineer: Hatch Mott MacDonald – sub to Gamuda