The construction of a single-span concrete arch at Joint Base Lewis-McChord Airfield, Tacoma, Washington, was completed ahead of schedule in February 2021. The reinforced concrete structure can withstand a 100-year stormflow compared to the 1950s design that could withstand a 50-year stormflow, and replaces two steel pipe culverts that began eroding and thinning out, causing major structural issues and debris blockages to the runway and the Clover Creek stream that ran beneath it.