Tetra Tech INCA 
Services Civil and Survey, Transportation and Transit Survey and Mapping Topographic Design Mapping I-405 South Bellevue Design Build
Services Civil and Survey, Transportation and Transit Survey and Mapping Topographic Design Mapping I-405 South Bellevue Design Build
| I-405 South Bellevue Design Build |
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INCA provided design mapping and construction surveying for widening of I-405 between SE 8th Street and 112th Ave NE. The project includes construction of 1,200-foot-long bridge spanning I-90, retaining walls and noise walls, utilizing InteliSum in the design mapping phase to provide the design team with accurate hard surface pavement grades. The scope of work included the study of the drainage basin for 2 miles of I-405. Survey included location, invert information, and pipe dimensions for over 450 storm structures.