Widening of the I 10: DYWIDAG Systems stabilize Retaining Walls along one of the longest Freeways in the USA

From the East coast to the West coast, Interstate 10 is one of the longest freeways in the USA. In order to reduce frequent traffic congestion, the California Department of Transportation is widening an approx. 9.7km (6mi) long section in the Californian city of Pomona in Los Angeles County by adding more lanes.

The construction of several  retaining walls was required for this project, 8 of which were soil nail walls and 2 were tieback walls.

For the soil nail walls, DSI USA supplied 11,025 DYWIDAG Soil Nails. 7,372 were double corrosion protected Grade 75 THREADBAR® in diameters of 25 to 36mm.

The remaining 3,653 were epoxy coated per ASTM A934 with a 0.90m (3ft) DCP section. In addition, 104 DYWIDAG Strand Anchors were installed in the 2 tieback walls.


California Department of Transportation, USA

General Contractor

Atkinson Construction, LLC, USA


Drill Tech Drilling and Shoring, Inc., USA


California Department of Transportation, USA


DYWIDAG-Systems International USA Inc., BU Geotechnics, USA


Production, supply


11,025 DYWIDAG Soil Nails, 104 DYWIDAG Strand Anchors

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