DART Cotton Belt Silver Line

LTRA was the lead firm for preparing construction plans for double tracking the Trinity Railway Express (TRE) line from IH 35W to east of S. Sylvania Ave. LTRA prepared the civil sheets including the demolition plan, track plan and profile sheets, typical sections, drainage area map and calculations, guideway drainage plan and profile sheets, hike and bike revisions, and temporary erosion control. Railroad bridges over a creek, North South Freeway, West Fork of the Trinity River and Sylvania Avenue were designed with the project. The plans included details for rehabilitation of the existing trestle bridge over West Fork Trinity River and a new steel through plate girder bridge spanning the river. During project development LTRA coordinated with TRE, City of Fort Worth, TxDOT, COE and the adjacent designer of 35W corridor. LTRA also captured Mobile LiDAR data from a High Rail Vehicle and produced a topographic feature on the existing trestle bridge and its super structure to support the bridge rehabilitation. Adjacent topographic features were extracted from the LiDAR cloud data to show a complete 3D model of the existing bridge and the surrounding area of the Trinity River bottom.

LTRA was part of the Design Build team working in collaboration with Dallas Area Rapid Transit (DART) to design the last section of the Orange line from Belt Line Rd to Terminal A Station, inside DFW International Airport. LTRA was responsible for the design of the Civil, Demolition, Drainage, and Utility Relocations for segment 3. Project scope included the design and reconstruction of a four-lane major arterial, North Airfield Drive, from west of Freeport Parkway to Grapevine Creek. LTRA developed paving and drainage designs, which included roadway geometrics, cross sections, and storm drain design. LTRA was also responsible for SUE on Sections 1 and 2 of the Orange Line through Irving, generating Level B SUE for water, wastewater, telephone, fiber optic cable, gas, pipelines, traffic signal, and electric utilities. LTRA worked closely with 19 different utility companies, municipalities and DART to develop a Utility Conflict Matrix that was eventually reduced to only 134 conflicts with the new location rail line through proactive coordination. LTRA supported the successful delivery of this significant regional transit project that has increased ridership on DART and spurred significant transit-oriented development around the new stations.