From SC2Pod
The SCV is the most basic of the Terran units. SCVs are the Terran's worker bee. SCVs perform all manual labor such as the constructing and repairing of buildings, as well as mining both gas and mineral resources.
SCVs construct all the Terran buildings with the exception of the Reactor and the Tech Lab. Only one SCV is able to construct a building at a time. SCVs can patrol, which can be coupled with their autocasting Repair to keep a large area of units or buildings at full health. It should be noted that the SCV is the only unit in the game that can be either healed or repaired, since it is both Biological and Mechanical.
Lore
Initially used during the reconstruction of the Tarsonian Orbital Platforms, the T-280 SCV (Space Construction Vehicle) became a staple in intra-Colonial construction and engineering due to its ability to perform any number of construction tasks within the vacuum of space. It is this versatility, and an unmatched reliability, that make the SCV an invaluable tool in rapidly establishing Marine encampments and strike bases on any terrain. Maintain your civilian status while serving your Colony!
Constructs
Basic Structures (B)
Advanced Structures (V)
Weapons
Abilities
| Repair (R) [edit] (autocast)
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| Used by | SCV
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| Repairs target at the cost of resources. Can repair any mechanical unit, including flying units and buildings.
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Upgrades
Campaign-Only Upgrades
Screenshots
Older Screenshots
50
17
1
4 per trip from a geyser with a 
