What does it take to build a new westbound viaduct across the Nalley Valley in Tacoma? Here's the project by the numbers:
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Total project funding: |
$183.7 million |
|
Nickel funding: |
$162.7 million |
|
Construction contract amount: |
$119.9 million |
|
Average daily traffic in 1971: |
40,000 |
|
Average daily traffic today: |
131,000 |
|
Number of bridges: |
10 |
|
Number of piers (columns): |
77 |
|
Estimated steel: |
10.4 million pounds |
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Estimated concrete: |
48,000 cubic yards |
|
Depth of piers in the ground: |
50 to 70 feet |
|
Height of piers above the ground: |
40 to 84 feet |
|
Capacity of temporary stormwater retention ponds: |
3 million gallons |
|
Capacity of permanent stormwater retention ponds: |
22.4 million gallons |
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Linear storm drainage: |
3.14 miles |
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Height of existing viaduct: |
64 feet |
|
Highest point of new westbound viaduct: |
94 feet |
|
Square feet of bridge deck: |
332,457 |
|
Acres of bridge deck: |
7.63 |