7
The number of years it took to construct the Alva B. Adams Tunnel |
4
The number of years it took to drill the tunnel from end to end |
13.1
The length in miles of the tunnel |
$12.8 million
The cost to construct the tunnel |
2 to 3
The number of hours it takes for water to travel from west to east in the tunnel |
6
The increase in degrees Fahrenheit six miles inside the tunnel than the temperature at either end |
5
The diameter in inches of the nitrogen-filled steel pipe that runs the length of the tunnel. The pipe encloses an electrical conduit suspended from the ceiling of the tunnel |
69,000
The voltage of the transmission line that delivers power through the Alva B. Adams Tunnel to Lake Granby |
144
The number of dynamite sticks used in the ceremonial blast when work began on the tunnel's East Portal |
213,000
Average acre feet of water delivered annually through the tunnel |
550
The tunnel's capacity in cubic feet per second |
1,100
The number of acre feet the tunnel can deliver in a 24-hour period |
