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User / WSDOT / Sets / SR 410 - Scatter Creek Bridge Seismic Retrofit
Washington State Dept of Transportation / 22 items

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In the summer of 2014, contractor crews seismically retrofit the supporting columns of the SR 410 Scatter Creek Bridge near Enumclaw, WA.

The crews placed steel jackets around the bridge piers which will help keep the piers stable and reduce the risk of collapse in the event of an earthquake.

Preserving SR 410 is vitally important because there are no local roads to use as a detour if an earthquake made the bridge unusable during the winter months. A closure of the bridge would completely cut off people between the span and Crystal Mountain Boulevard, where SR 410 closes each year due to snow on Cayuse Pass.

In addition one of the bridge piers has become vulnerable to erosion from the creek. To combat this, crews added rocks and other material to prevent water from washing away the banks around the bridge pier.

Fish habitat in the stream was also improved, thanks the removal of concrete and rebar debris left behind from an old bridge. Woody debris and other native vegetation was added to help improve the creek and surrounding environment.

Tags:   SR 410 Scatter Creek Bridge seismic retrofit bridge pier fish habitat improvement Enumclaw >ko

  • DESCRIPTION
  • COMMENT
  • MAP
  • O
  • L
  • M

In the summer of 2014, contractor crews seismically retrofit the supporting columns of the SR 410 Scatter Creek Bridge near Enumclaw, WA.

The crews placed steel jackets around the bridge piers which will help keep the piers stable and reduce the risk of collapse in the event of an earthquake.

In addition one of the bridge piers had become vulnerable to erosion from the creek. To combat this, crews added rocks and other material to prevent water from washing away the banks around the bridge pier.

Fish habitat in the stream was also improved, thanks the removal of concrete and rebar debris left behind from an old bridge. Woody debris and other native vegetation was added to help improve the creek and surrounding environment.

Six months later, water is rushing through the creek in this January 2015 photo.

Tags:   SR 410 Scatter Creek Bridge seismic retrofit bridge pier fish habitat improvement Enumclaw >ko

  • DESCRIPTION
  • COMMENT
  • MAP
  • O
  • L
  • M

In the summer of 2014, contractor crews seismically retrofit the supporting columns of the SR 410 Scatter Creek Bridge near Enumclaw, WA.

The crews placed steel jackets around the bridge piers which will help keep the piers stable and reduce the risk of collapse in the event of an earthquake.

Finishing up the project involves cleanup too... and that means covering our tracks.

The access road was cleaned up and replanted with native vegetation. It may take several years, but eventually it will be difficult to tell there was once an access road.

Tags:   SR 410 Scatter Creek Bridge seismic retrofit bridge pier fish habitat improvement Enumclaw >ko

  • DESCRIPTION
  • COMMENT
  • O
  • L
  • M

In the summer of 2014, contractor crews seismically retrofit the supporting columns of the SR 410 Scatter Creek Bridge near Enumclaw, WA.

The crews placed steel jackets around the bridge piers which will help keep the piers stable and reduce the risk of collapse in the event of an earthquake.

First things first, building a road so the heavy equipment needed for the project can reach the creek.

An excavator and bulldozer carefully cleared a very steep access road to the creek and covered it with baseball sized rocks.

Tags:   SR 410 Scatter Creek Bridge seismic retrofit bridge pier fish habitat improvement Enumclaw >ko

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Working in a stream means that it must be diverted in order to protect it.

A series of dams, pipes, sandbags, pumps and some really big pipes do the trick.

This was all necessary during the summer of 2014 when contractor crews seismically retrofit the supporting columns of the SR 410 Scatter Creek Bridge near Enumclaw, WA.

The crews placed steel jackets around the bridge piers which will help keep the piers stable and reduce the risk of collapse in the event of an earthquake.

Tags:   SR 410 Scatter Creek Bridge seismic retrofit bridge pier fish habitat improvement Enumclaw >ko


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