A company hired to deliver an entire scope of work, rather than splitting it among multiple subcontractors. For field service subs, this means one firm holds the prime contract and manages all trades underneath. Winning a single-source role improves cash flow and reduces competition, but increases liability exposure.
Single-Source Contractor
Related Terms
Cold-Milled Asphalt
IndustryReclaimed pavement material produced by grinding existing asphalt surfaces without heat. Subcontractors encounter it during road restoration work on well pads, pipeline rights-of-way, and industrial sites. It is commonly reused as base material, reducing disposal costs and material haul-off requirements.
Surface Coil System
IndustryA temporary heating system using fluid-filled coils laid on the ground to thaw frozen soil or maintain process temperatures. Subcontractors are often hired to install, monitor, and remove these systems during cold-weather operations. Common in northern pipeline and facility projects where ground conditions affect construction timelines.
Alliance Construction Contract
IndustryA collaborative agreement where owners, contractors, and subcontractors share project risks and rewards under a no-blame framework. Subcontractors may receive performance bonuses but also absorb a portion of cost overruns. Transparency in costs and open-book accounting are typically required.
NGL (Natural Gas Liquids)
IndustryHydrocarbons extracted from natural gas, including propane, butane, and condensate. NGL facilities and pipelines generate steady subcontract work in processing, instrumentation, and maintenance. Understanding NGL handling requirements helps crews meet site-specific safety and equipment standards.
Limited Notice To Proceed
IndustryAn LNTP (Limited Notice to Proceed) authorises subcontractors to begin a defined scope of work before the full contract is executed. It typically covers early mobilisation, procurement, or site prep activities up to a specified dollar limit. Work performed beyond that limit is at the subcontractor's own risk until full NTP is issued.
Leader (drilling Rig)
IndustryA vertical guide structure on a pile-driving or drilling rig that keeps the drill string or pile aligned during penetration. Subcontractors working near this equipment must follow strict exclusion zone protocols. It is also called a mast or leads on some rigs.
Latest Industry News
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