When we drive across a bridge and see exposed rebar and chipped concrete, we assume the bridge needs attention. We may even wonder whether the bridge is safe. But when it comes to the safety and integrity of a bridge, there is much more at work than what we see above ground. A structure is only as good as its foundation. Beyond the superstructure, how do we ensure the strength and stability of a structure's foundation? One effective solution: helical piles.

Save Money with This Long-term Fix for Scour Problems

Scour poses a large threat to the stability of any structure that is partially or entirely underwater. It may develop slowly over time, or be brought on quickly by an intense rain event or seasonal flooding. In some cases, such as along a shoreline, scour can be very evident. In others, scour can go unnoticed for an extended period of time. Whether it is taking place around the footing of a bridge pier, along the base of a sheet pile wall, or along a tailrace on a dam, scour may not be evident until the structure begins to show signs above the water. At this point, the structure is beginning to fail and repairs must be done soon to avoid a total loss of integrity. Repairing scour and erosion issues that may be going unnoticed in any location is vital as it will save a lot of money in the long run, and extend the life of the structure.

---Updated July 25, 2022, by Kimberly Walters---

Upgrading infrastructure in the United States of America has long been delayed and is now reaching a critical point. Replacing railroad bridges that are old or have exceeded their useful design life is just as important as any other element of our nation’s infrastructure. Bridges are a small component of an extensive railroad system. However, if taken out of service, a whole line could be shut down. Railroad companies would lose time, expenses would increase, and commodities would be delayed.

According to the United States Department of Transportation, underwater scour is the leading cause of bridge failure, ahead of collisions and overloading. Scour is the erosion or removal of a streambed or bank material from bridge foundations due to flowing water. As many bridges sit over water, the potential dangers of scour cannot be ignored. There are many solutions to scour problems. However, there are two options that we find the most effective.

Traditionally when it comes to installing sheet piling around a bridge pier or along an embankment we think of steel sheet piling.  Steel sheet piling are the most common, and have been one of the most effective methods of installing a deep foundation.  They have a long history of providing a robust barrier through shaped, interlocking sheets that can last for 75+ years. 

It is inevitable.  Over time a river will dig out the land over which it flows.  That’s why we have valleys, coulees, and scour problems on every structure we place in its path.  As James Eads would mostly likely attest, rivers cannot be fully tamed and scour repair will always be a constant struggle for anything set in their way.  Bridge piers are one of the most vulnerable structures to scour problems.