As part of the I-405 Bellevue Braids Project crews are removing the old NE 12th Street Bridge to replace it with a new bridge. The new bridge will be longer and wider and accommodate new ramps traveling to SR 520 and I-405.
Here are some numbers for you to crunch:
300, 54, 14
- Located just south of I-405/SR 520 interchange the old NE 12th Street Bridge runs about 300 feet long and 54 feet wide and is just 14 feet above I-405.
- The new bridge will be 384 feet long, 96 feet wide and 16 1/2 feet above I-405. The wider bridge will have a bicycle and pedestrian lane separated from traffic.
- The total weight of debris being moved from the old bridge is equivalent to the weight of 2 Statue of Liberties.
- Nearly 8 million pounds (4000 tons) of concrete will be crunched into smaller chunks and hauled away—about the weight of 21 Boeing 747s.
- 450,000 pounds (225 tons) of rebar will be extracted. This is equivalent to the weight of an adult blue whale.
- 1.3 million pounds (675 tons) of sand will be placed on the roadway - acting as a buffer to protect the roadway from falling debris from the bridge.
- Crews will use about 20 pieces of equipment to remove the old bridge including:
- 2 huge excavators with special attachments (crunchers)
- 2 smaller machines with breakers or “bucket”
- 2 loaders
- 8 Big (30 ton capacity) trucks will continuously remove debris and recycle it locally
The final number may be the most important.
No Fooling - beginning Friday, April 1 at 11pm we’ll close I-405 completely in both directions for 53 hours.
You won’t be able travel I-405 through downtown Bellevue for the remainder of the weekend until Monday at 4 am, but there are detours in place.