v3.5.0.2

PROPERTY, PLANT AND EQUIPMENT AND INTANGIBLE ASSETS - Schedule of property, plant and equipment (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Aug. 04, 2016 MMcf | Dec. 31, 2015 USD ($)
Property, plant and equipment, net |  |  |  |  |  |  |
Property, plant and equipment, gross | $ 391,393 |  |  | $ 391,393 |  |  | $ 509,805
Accumulated depreciation | (33,160) |  |  | (33,160) |  |  | (24,650)
Total property, plant and equipment, net | 358,233 |  |  | 358,233 |  |  | 485,155
Impairments |  |  | $ 215,758 | 107,477 | $ 215,758 |  |
Depreciation expense | 3,400 |  | $ 4,300 | 11,400 | $ 11,200 |  |
Gathering pipelines and related equipment |  |  |  |  |  |  |
Property, plant and equipment, net |  |  |  |  |  |  |
Property, plant and equipment, gross | 285,154 |  |  | $ 285,154 |  |  | 319,058
Property, plant and equipment, Estimated useful lives |  |  |  | 45 years |  |  |
Gas processing and compression facilities |  |  |  |  |  |  |
Property, plant and equipment, net |  |  |  |  |  |  |
Property, plant and equipment, gross | 94,962 |  |  | $ 94,962 |  |  | 173,679
Property, plant and equipment, Estimated useful lives |  |  |  | 20 years |  |  |
Buildings |  |  |  |  |  |  |
Property, plant and equipment, net |  |  |  |  |  |  |
Property, plant and equipment, gross | 2,104 |  |  | $ 2,104 |  |  | 2,175
Property, plant and equipment, Estimated useful lives |  |  |  | 30 years |  |  |
Other depreciable assets |  |  |  |  |  |  |
Property, plant and equipment, net |  |  |  |  |  |  |
Property, plant and equipment, gross | 5,563 |  |  | $ 5,563 |  |  | 5,589
Other depreciable assets | Minimum |  |  |  |  |  |  |
Property, plant and equipment, net |  |  |  |  |  |  |
Property, plant and equipment, Estimated useful lives |  |  |  | 3 years |  |  |
Other depreciable assets | Maximum |  |  |  |  |  |  |
Property, plant and equipment, net |  |  |  |  |  |  |
Property, plant and equipment, Estimated useful lives |  |  |  | 15 years |  |  |
Land and rights of way |  |  |  |  |  |  |
Property, plant and equipment, net |  |  |  |  |  |  |
Property, plant and equipment, gross | 3,137 |  |  | $ 3,137 |  |  | 9,027
Construction in progress |  |  |  |  |  |  |
Property, plant and equipment, net |  |  |  |  |  |  |
Property, plant and equipment, gross | $ 473 |  |  | $ 473 |  |  | $ 277
Gathering & Processing |  |  |  |  |  |  |
Property, plant and equipment, net |  |  |  |  |  |  |
Impairments |  | $ 78,300 |  |  |  |  |
Panola I Processing Plant | Panola I Processing Plant and Murvaul Pipeline |  |  |  |  |  |  |
Property, plant and equipment, net |  |  |  |  |  |  |
Processing capacity per day (in MMc/f) | MMcf |  |  |  |  |  | 100 |

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