Los Angeles County Metropolitan Transportation Authority (LA Metro), Regional Connector Transit Corridor Contractor Design and Construction Support Services

12 regional connector

Services Provided:
Project Management

Utilities & Design

Field Verifications

Relocation Concept Design

3-D Modeling

Owner’s Review & Approval

Plans & Specifications

Plan Check & Permitting

Agency Coordination

Construction Engineering Support

The LA Metro Regional Connector Project is a 1.9 mile underground rail transit system from 7th and Flower Street to 1st Street and Central Avenue with three new underground stations and connection to the LA Metro Blue, Expo and Gold Lines. The connecting light rail line will allow passengers to travel from eastern Los Angeles to Santa Monica, or from Pasadena to Long Beach without transferring trains, and is estimated will improve cross-town commuting times by 20 minutes.

MARRS provided utilities engineering design and construction support for utility relocation plans and specifications in three design milestones for sewer, water, fire lines and hydrants, storm drain lines, and station connections. MARRS coordinated the design with other disciplines, investigated existing utilities, and designed & value engineered the relocations of the conflicted utilities for the entire 1.9 mile stretch. MARRS was responsible for associated tasks such as field verification of topographic and survey information, pothole coordinating, developing 3-D models of proposed utilities, conducting clash detection of underground utilities in 3-D models, and permitting and performing all design and calculations in accordance with the City of Los Angeles requirements. Each design submittal went through a rigorous QA/QC process involving independent design review, as well as interdisciplinary review for any conflicts and inconsistencies. Expedited relocation concepts approval allowed design completion on a tight schedule, because of MARRS’ knowledge of the City of Los Angeles Department of Water and Power (LADWP) and Los Angeles Bureau of Engineering (LABOE) standards, processes and procedures.

Project Features:
• Subway
• Stations
• Utilities Relocation
• Design-Builder