London Tower BridgeLondon Tower Bridge

First Moveable First Moveable Bridge Across Bridge Across ThamesThames

18941894 Span - 800 feet Span - 800 feet

Chesapeake Bay Bridge-TunnelChesapeake Bay Bridge-Tunnel Total Length - 17.5 milesTotal Length - 17.5 miles Two Mile-Long TunnelsTwo Mile-Long Tunnels Aircraft Carriers, Tankers, Etc.Aircraft Carriers, Tankers, Etc.

TunnelsTunnelsOrwigsburg (1821) - Auburn, PennOrwigsburg (1821) - Auburn, Penn

450 feet - First In US450 feet - First In USMont Cenis (1871) - France To ItalyMont Cenis (1871) - France To Italy

8.5 miles - First Railroad Tunnel8.5 miles - First Railroad TunnelSimplon (1922) - Switzerland To ItalySimplon (1922) - Switzerland To Italy

12.3 miles - “Most Famous In World”12.3 miles - “Most Famous In World”New York TunnelsNew York Tunnels

Holland (1927), Lincoln (37,45,57)Holland (1927), Lincoln (37,45,57)Channel Tunnel (1993 ?)Channel Tunnel (1993 ?)

21 miles21 miles

DamsDams

TypesTypesGravity, Arch, Butress, EmbankmentGravity, Arch, Butress, EmbankmentCombined TypesCombined Types

Egypt - 4000 BCEgypt - 4000 BCNile River - City of MemphisNile River - City of Memphis

Grand Coulee DamGrand Coulee DamHoover DamHoover DamAswan High DamAswan High Dam

Grand Coulee Dam (1933-42)Grand Coulee Dam (1933-42) Washington Lead States in Hydroelectric PowerWashington Lead States in Hydroelectric Power Gravity Dam - Columbia RiverGravity Dam - Columbia River

550 feet High, 4172 feet Long550 feet High, 4172 feet Long

6.5 Million kW by 19806.5 Million kW by 1980