AEL was contracted by TxDOT to provide professional engineering services that consisted of conducting a hydrology and hydraulic (H&H) study for widening for existing FM 723 2-lane corridor to a 4-lane divided roadway with left-turn lanes. The drainage study addressed impact to the existing areas and improved conveyance by adding roadside ditches, storm sewer, and increasing the capacity of cross culverts to provide for updated Atlas 14 100YR storm events. The study also addressed improving the inline mitigation. AEL designed 20 roadway cross culverts and 3 bridge class culvert crossings. GIS was used to calculate the CN values utilizing SCS methodology including hydraulic soil group and land use type within GIS. SWIMM was used to model the roadside ditches and convey their flows to the various outfalls along the project. HY8 was used to analyze the cross culverts and ensure adequate capacity and WSEL was achieved during design. HEC-RAS was used to model the Brazos river and Jones Creek. HEC-RAS eas used to calculate the hydrology and hydrograph for the SWIMM analysis.
Location: Rosenberg, Texas 77406