Reconstruction of Cypress Rose Hill in northwest Harris County from a 2-lane asphalt open ditch section to a 4-lane concrete boulevard with side swales, storm sewers and two detention basins. The new road was designed to have the same Level of Service during extreme events as the existing road as the road traverses across a wide floodplain and through the floodway of Willow Creek. The two detention basins, being a combined 40 ac-ft of storage, are designed to mitigate any adverse impacts from the road improvements.