Arias provided Construction Materials Testing services for the construction of the new Robert L.B. Tobin Land Bridge connecting East and West sides of Phil Hardberger Park over Wurzbach Parkway in San Antonio, Texas. The park is a multifaceted natural area spanning over 300 acres with 3.64 miles of hike-and-bike trails on the west side and 2.84 miles on the east side. The bridge that connects both sides is 150 feet wide at the top, 165 wide at the base, broad enough for animals and people to safely cross and is a continuation of the natural beauty of the park. People crossing it will have the experience of climbing over a hill, unaware of the traffic below.

The concrete and steel foundation of the bridge is covered with three feet of fertile soil and in due time, it will simply become part of the South Texas landscape. Much of the bridge is underground, a part of the earth itself and should last hundreds of years. Arias' scope of work consisted of soil sampling, testing and observation for the embankment and concrete sampling, and testing for the foundation of the bridge.

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