BROADWAY BRIDGE

River mile: 11.7

Opened: 22 April 1913

Type: double-leaf Rail bascule movable bridge, steel through truss

Main Span Length: 278 feet

Center Height to Water: 90 feet

Outside Width: 70 feet (four traffic lanes, with two 11-foot sidewalk/bike paths)

Color: "Golden Gate" red

Cost: $1.6 million

Owner: Multnomah County, built by City of Portland

Engineer/Designer: Ralph Modjeski, Chicago; Strobel Engineering, Chicago, Illinois (lift span)

Access: pedestrians, bicycles allowed

Bridge Opening Signals audible: two long, one short; radio frequency: KLU 724

Average Daily Traffic: 33,000

Historic American Engineering Record OR-22 and Addendum

BURNSIDE BRIDGE
>> Closure Info! <<

River mile: 12.4

Opened: 28 May 1926 Precursor, 1894

Type: steel double-leaf Strauss bascule movable bridge

Main Span Length: 252 feet

Center Height to Water: 64 feet

Outside Width: 86 feet (six traffic lanes, with two 7-foot sidewalks)

Color: yellow ochre; towers: red, beige and green

Cost: $3 million

Owner: Multnomah County

Engineer/Designer: Hedrick & Kremers, Portland, Oregon; Gustav Lindenthal, New York, New York; Joseph Strauss, Chicago, Illinois (bascule)

Access: pedestrians, bicycles allowed

Bridge Opening Signals audible: one long, two short; radio frequency: KTD 520

Average Daily Traffic: 41,000

Historic American Engineering Record OR-101

FREMONT BRIDGE

River mile: 11.1

Opened: 11 November 1973

Type: steel three-span half-through tied arch, with orthotropic upper deck

Main Span Length: 1,255 feet

Center Height to Water: 175 feet (lower deck)

Top of Arch to Water: 381 feet

Outside Width: 81 feet (eight traffic lanes)

Color: "celery" green

Cost: $82 million (including $5.5 million repair cost)

Owner: ODOT

Engineer/Designer: Parsons, Brinckerhoff, Quade & Douglas, New York, New York; Werner Storch and Assoc, Portland, Oregon (concept)

Access: no pedestrians or bicycles

Average Daily Traffic: 109,200

Historic American Engineering Record OR-104

HAWTHORNE BRIDGE

River mile: 13.1

Opened: 19 December 1910; Precursors, 1891, 1900

Type: steel through truss (Parker), vertical lift

Main Span Length: 244 feet

Center Height to Water: 49 feet

Vertical Lift: 110 feet

Horizontal Clearance: 230 feet

Outside Width: 73 feet (four traffic lanes, with two 10-foot sidewalks)

Color: green with red trim

Cost: $500,000 (plus $21,000,000 for 1998-99 rehabilitation)
Owner Multnomah County

Engineer/Designer: Waddell & Harrington, Kansas City, Missouri

Access: pedestrians, bicycles allowed

Bridge Opening Signals audible: one long, four short; radio frequency: KTD 521

Average Daily Traffic: 30,500

Historic American Engineering Record OR-20 and Addendum

MARQUAM BRIDGE

River mile: 13.5

Opened: 4 October 1966 (lower deck) 18 October 1966 (upper deck)

Type: double-deck steel through cantilever truss

Main Span Length: 440 feet

Center Height to Water: 165 feet (upper deck) 130 feet (lower deck)

Outside Width: 57 feet (four lanes southbound; three lanes northbound)

Color: concrete gray

Cost: $14 million

Owner: ODOT

Engineer/Designer: ODOT

Access: no pedestrians or bicycles

Average Daily Traffic: 139,100

Historic American Engineering Record OR-106