Bridges for less than $1 billion built in the 21st century  

Data from: https://www.clarkcountytoday.com/news/bridges-for-less-than-1-billion-built-in-the-21st-century/

Bridge

Length (ft)

# Lanes

Date

Cost/lane(+2)-foot (thousand)

Cost

(millions)

Tolls

Figg Engineering

10995


2014


860  (est)


Tacoma Narrows Bridge

5979

4

2007

23.6

$849

partly

Hood River Bridge

4553

2

planned

16.4

$300

Yes

Arthur Ravenel Bridge

13200

8

2005

3.9

$632

No

I-90 Mississippi River Bridge

2593

4

2016

11.9

$185.50

No

Minneapolis  I-35W

1216

10

2007

13.7

$234

No

Veterans’ Glass City Skyway

8800

6

2007

2.7

$237

No

South Norfolk (VA) Jordan Bridge

5000

2

2012

7.1

$142

2.65

EZ Pass

Pensacola Bay Bridge

15640

6

planned

2.7 est

$430 (est.)

No

Mike O’Callaghan–Pat Tillman Memorial Bridge

1900

4

2010

21.1

$240

No

Sarah Mildred Long Bridge

2800

2 + freight rail

2018

–

$158.50

Sarah Mildred Long Bridge

I5 proposed

3538

10



$594@12/ln-mi


Cost/lane(+bd)-foot is the cost of each foot of each lane including assumed number of breakdown lanes.

2-4 lanes assumes one breakdown on each side for a total of 6 lanes

More than four lanes assumes divided directions with a total of 4 breakdown lanes.


Last line is a crude estimate of the expected cost of the I5 bridge based on length, 10+4 lanes at an assumed cost of $12 per lane-foot.  $12 is a guess at a typical cost of the wider bridges in this survey.

IT IS A VERY ROUGH ESTIMATE - $594, round off to $600 million.


Another rough estimate can be obtained by inflation adjusting the cost of the I205 bridge:

From: http://www.nobridgetolls.com/I205.html inflation adjust that 2010 estimate to 2020:  $466 million.


These two estimates are roughly the same: $500-600 million. If built with a profile like the current bridge pair (with a lift) there should be no added expense connecting it to the existing roads. There may be more for a lift and for changes to the railroad bridge to reduce lifts to a few a week.