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IndustryGlossary Term

Pjm (pennsylvania-New Jersey-Maryland) Interconnection Queue

A waiting list managed by PJM for new power generation and transmission projects seeking grid connection approval. Subcontractors use it to track upcoming infrastructure builds and time their bids accordingly. Long queue backlogs signal sustained field work demand in the PJM service territory.

Related Terms

Waterway Crossing

Industry

A section of pipeline, conduit, or cable routed beneath or across a river, creek, or other body of water. Crossings typically use methods like horizontal directional drilling (HDD) or open-cut trenching. Subcontractors must meet strict environmental permits and inspection requirements before and after installation.

Lng (liquefied Natural Gas) Train

Industry

A single end-to-end processing unit that cools natural gas into liquid form for storage and export. Large LNG facilities run multiple trains, each requiring dedicated construction, maintenance, and shutdown crews. Subcontractors are typically mobilised per train, making scope and schedule highly compartmentalised.

TOFD (Time-of-flight Diffraction)

Industry

An ultrasonic weld inspection method used to detect and size internal flaws in pipelines and pressure vessels. Subcontractors performing NDT work must hold TOFD-specific certifications to qualify for this scope. It is widely accepted by regulators as an alternative to radiographic testing.

Schedule Compliance

Industry

A measure of how consistently a subcontractor completes work within the agreed timeline. Low compliance can trigger penalties, delay progress payments, or affect contract renewal. Tracking it helps field crews identify where mobilisation or scope changes are causing slippage.

Mineral Estate

Industry

The legal ownership of subsurface resources like oil, gas, and minerals on a property. Subcontractors work under operators who hold mineral rights, so understanding this ownership structure clarifies who controls site access and project authorisation. Disputes over mineral estates can halt work orders without warning.

VDC (Virtual Design and Construction)

Industry

A project delivery approach that combines 3D modelling, scheduling, and cost data into a single digital environment. Subcontractors use VDC to coordinate scope, reduce field conflicts, and plan work sequences before boots hit the ground. Early involvement in VDC workflows can help subs identify clashes, price work more accurately, and avoid costly rework.

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