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Boone High Bridge

Todd Wimmer – UPRR December 4, 2009

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Boone High Bridge

Agenda :

• History of the Kate Shelley Bridge• Reason for repairs and replacement

Ne Boone High Bridge• New Boone High Bridge• Project Construction and Issues• Questions

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Kate Shelley Bridge

Kate Shelley Bridge - location

Portland

SeattleEastport

Twin Cities

Duluth

Oakland SLCKC

Omaha

Twin Cities

Denver

Chicago

LA

Calexico

St. Louis

DallasMemphis

Calexico

Nogales El Paso

Eagle Pass Houston

Laredo

DallasNew

Orleans

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BrownsvilleLaredo

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Kate Shelley Bridge - location

Location of new line and bridge location

Boonelocation.

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Moingona

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Kate Shelley Bridge - facts Bridge Information :C&NW line Chicago to Omaha Located 155 milesOmaha. Located 155 miles east of Omaha.

Spans the Des Moines River Valley.Valley.

Construction Started early 1899.

Bridge opened May 19th, 1901.

Length : 2685’Height : 190’

22 steel formed towers resting on stone pier foundations. Spans ranging from 45’ to 75’.

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300’ pin connected deck truss

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Kate Shelley Bridge Who is Kate Shelley ?

Bridge originally named the Boone Viaduct.

July 1881 thunderstorm flooded Des Moines river bottom washing out a bridge over a small ravine east of the river near Moingona.

A freight train derailed into the flooded waters killing the fireman whose body was never found The engineer survivednever found. The engineer survived.

Kate Shelley, then 15 yrs of age, knew of the derailment / washout and that a passenger train should soon be near. During the storm and heavy rains, with a lantern in hand, crossed the old Des Moines River bridge flagging the approaching passenger train to a stop.

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In 1926 the bridge was dedicated to the memory of Kate Shelley.

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Kate Shelley Bridge - construction

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Kate Shelley Bridge – construction

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Kate Shelley Bridge - construction

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Kate Shelley Bridge - testing

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Kate Shelley Bridge – opened May 19th, 1901

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Kate Shelley Bridge - then At this time, it is said that the Boone ViaductAt this time, it is said that the Boone Viaduct was the longest railroad bridge, both for single or double track, in the world.

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Kate Shelley Bridge - now

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190 ft. high

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Kate Shelley Bridge – Reasons for Replacement

Prior to 2002 1 train @ 35 mph•Prior to 2002, 1 train @ 35 mph.•After 2002, 2 trains @ 25 mph.•Creates a bottleneck and traffic congestion.•Bridge is 104 years of age.•Structural wear and degradation•Structural wear and degradation.

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Kate Shelley Bridge – Reasons for Replacement

Crack in floor beam connection Section loss due to rusting

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Kate Shelley Bridge – Reasons for Replacement

Broken stiffener at a cross frameSection loss and cracking at connection

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Kate Shelley Bridge – Reasons for Replacement

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Repairs made in 2002

Kate Shelley Bridge – Repairs and strengthening

Repairs made in 2002

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Lateral bracing rodsLateral struts and bottom diagonals

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Kate Shelley Bridge – Repairs and strengthening

Repairs made in 2002

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Kate Shelley Bridge – Repairs and strengthening

Top chord strengthening

Cross frame lateral bracingCross frame lateral bracing

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Bottom diagonals

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Kate Shelley Bridge – Repairs and strengthening

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Kate Shelley Bridge – Repairs and strengthening

B fBefore After

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Kate Shelley Bridge – Repairs and strengthening

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Kate Shelley Bridge

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New Boone High Bridge

•Design speed 70 MPH.•Double Track on 20 ft centers.•Original length 2550 ft long.•Revised length 2813ft long.

•Original Project Cost : $43 millionD i d 2005 2006•Designed 2005 -2006

•Started Construction late 2006•Original completion Nov 2008•Revised completion Aug. 20, 2009

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New Boone High Bridge

• 26 concrete column bents ( 5 towers )• Spans ( 6@30’ PCB, 20@110’DPG and 6@70’ DPG x2 )

0 0416% d• 0.0416% grade• Nearly 560,000 yd^3 earthwork• Nearly 26,000 yd^3 concrete used• Nearly 2.9 million lbs steel rebar• Nearly 1 2 million lbs structural steel and embeds

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• Nearly 1.2 million lbs structural steel and embeds• Total weight estimated near 13.6 million lbs

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20 ‘

15.5 ‘

7 ‘

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Slide plane

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Key :1. Original ground line2. Designed slope3. Current slope4. Approx. shale layer5 Estimated failure plane

Original Design5. Estimated failure plane

Bent #2 East Abutment

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Proposed DesignKey :1. Proposed slope2. New 70’ span3. New east approach ( 3 x 30’ spans )

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Boone High Bridge – Revised DesignEastWest EastWest

New 70’ steel span

102’ new west end approach

Original Slopes

90’ new east end approach

New slopes

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Boone High BridgeTh k YThank You

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