Pipeline Bridges
Number
total 13
Types, numbers of each and definition
Orthotropic box girder- 1
Main supporting members are made up of
steel plates welded together to form box beams with the tops of the box beams being an
integral part of the driving deck.
Plate girder- 9
Main supporting members are made up of
steel plates welded together to form deep, wide flanges.
Suspension- 2
Pipe is suspended from large steel cables
draped over towers and anchored to massive foundations on opposite banks.
Tied arch-1
Supporting element is a steel arch with a
horizontal steel member, tying the bases of the arch together to resist the tendency of
the bases to move apart.
Type, length and
pipeline milepost locations of individual bridges, north to south
Atigun
River
- Plate girder
- 537 ft.
- MP 142.0
Roche Moutonnee
- Plate girder
- 177 ft.
- MP 147.6
Dietrich River
- Plate girder
- 357 ft.
- MP 205.3
Middle Fork, Koyukuk River
- Plate girder
- 537 ft.
- MP 222.0
Hammond River
- Plate girder
- 357 ft.
- MP 222.3
South Fork, Koyukuk River
- Plate girder
- 537 ft.
- MP 256.2
|
Yukon River
- Orthotropic box girder
- 2,295 ft.
- MP 353.3
Hess Creek
- Plate girder
- 177 ft.
- MP 376.6
Tatalina River
- Plate girder
- 177 ft.
- MP 412.5
Shaw Creek
- Plate girder
- 177 ft.
- MP 520.3
Tanana River
- Suspension
- 1,299 ft.
- MP 531.2
Gulkana River
- Tied arch
- 400 ft.
- MP 654.4
Tazlina River
- Suspension
- 650 ft.
- MP 686.8
|
|