Siefert Associates continues to provide construction engineering services at LaGuardia Airport in Queens, NY for Skanska Walsh JV. Pictured: Bridges L30 (above) and Bridge L35 Unit 3 (below). Siefert Associates will provide engineered lift plans for the remaining spans for Bridges L33 through L35 that will be erected below L30. Bridge L30 is a crucial connector between central and east roadways. In addition, Siefert Associates continues to work on west roadways, Bridge L21 and L22.