Simultaneous EPC execution for Five South Texas Metering Stations

Project overview

1 brownfield + 4 greenfield natural gas metering stations
570-MMscf/d pipeline network expansion
High-pressure gas delivery
10 pipeline tie-ins + hot taps
Control systems + RTU/GC integration
Ultrasonic metering + gas quality analysis

Scope of work

Audubon Companies was selected to provide engineering, procurement, and construction (EPC) services for five metering stations supporting a major pipeline expansion in South Texas. Our EPC teams coordinated whole-project execution across one brownfield and four greenfield sites concurrently to provide critical natural gas measurement, pressure control, and delivery infrastructure for a $455 million pipeline expansion. Designed to increase natural gas transportation capacity from the Permian Basin to South Texas markets by 570 MMcf/d, the expansion strengthened long-term pipeline reliability and operational flexibility across the energy infrastructure company’s growing network.

Standardized engineering + construction execution across five sites

Audubon aligned engineering, procurement, fabrication, and field construction teams under a centralized execution strategy, enabling all five metering stations to advance simultaneously across multiple construction environments. Through integrated project management, our teams streamlined scheduling, procurement tracking, constructability reviews, and field execution activities to maintain continuity across every site.

Our multidisciplinary engineering teams developed process flow and process and instrumentation diagrams (PFDs, P&IDs), civil and structural drawings, piping isometrics, electrical one-line diagrams, grounding plans, and instrumentation design packages. By leveraging fit-for-purpose engineering packages and coordinated execution planning, we prioritized consistency among sites while supporting efficient fabrication, procurement, and field construction

Integrated field execution + live-system coordination

Audubon self-performed drill pier installation, foundations, underground piping, structural steel assembly, equipment setting, piping installation, and electrical and instrumentation systems across all five metering stations. Under an integrated field execution approach, our construction teams installed filter separators, ultrasonic metering systems, flow control valves, instrument gas systems, and associated piping and electrical infrastructure including remote terminal unit (RTU) and gas chromatograph (GC).

To maintain alignment with active pipeline operations and broader expansion milestones, Audubon coordinated tie-ins, hot tap activities, in-service welding support, hydrotesting, nondestructive evaluation (NDE), and startup planning across multiple work fronts and operating conditions. Close coordination among field, engineering, construction management, and operations personnel allowed for safe, efficient progress throughout construction and commissioning.

Supporting long-term pipeline reliability

Through integrated EPC execution, standardized engineering strategies, and coordinated field construction, Audubon delivered scalable metering station infrastructure designed for reliable natural gas distribution, operational flexibility, and long-term pipeline performance across the operator’s South Texas network.

Building five metering stations at the same time took close coordination across engineering, procurement, and field construction teams. With a standardized execution strategy and constant alignment across all sites, we kept all sites on track, bringing critical energy across the state.

-Saji Samuel SVP, Strategic Business Planning + Execution, Audubon