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Description of Business and Basis of Presentation (Tables)
 6 Months Ended
Jun. 30, 2019
Accounting Policies [Abstract]  
Assets and Investments Table As of June 30, 2019, the Partnership’s assets and investments consisted of the following:
 
 
Owned and
Operated
 
Operated
Interests
 
Non-Operated
Interests
 
Equity
Interests
Gathering systems (1)
 
17

 
2

 
3

 
2

Treating facilities
 
35

 
3

 
—

 
3

Natural gas processing plants/trains
 
24

 
3

 
—

 
5

NGLs pipelines
 
2

 
—

 
—

 
4

Natural gas pipelines
 
5

 
—

 
—

 
1

Oil pipelines
 
3

 
1

 
—

 
3


(1) 
Includes the DBM water systems.
Ownership Interests and Method of Consolidation Table The following table outlines the ownership interests and the accounting method of consolidation used in the consolidated financial statements for entities not wholly owned:
 
 
Percentage Interest
Equity investments (1)
 
 
Fort Union
 
14.81
%
White Cliffs
 
10.00
%
Rendezvous
 
22.00
%
Mont Belvieu JV
 
25.00
%
TEP
 
20.00
%
TEG
 
20.00
%
FRP
 
33.33
%
Whitethorn LLC
 
20.00
%
Cactus II
 
15.00
%
Saddlehorn
 
20.00
%
Panola
 
15.00
%
Mi Vida
 
50.00
%
Ranch Westex
 
50.00
%
Red Bluff Express
 
30.00
%
Proportionate consolidation (2)
 
 
Marcellus Interest systems
 
33.75
%
Springfield system
 
50.10
%
Full consolidation
 
 
Chipeta (3)
 
75.00
%
(1) 
Investments in non-controlled entities over which the Partnership exercises significant influence are accounted for under the equity method. “Equity investment throughput” refers to the Partnership’s share of average throughput for these investments.
(2) 
The Partnership proportionately consolidates its associated share of the assets, liabilities, revenues and expenses attributable to these assets.
(3) 
The 25% interest in Chipeta Processing LLC (“Chipeta”) held by a third-party member is reflected within noncontrolling interests in the consolidated financial statements, in addition to the noncontrolling interests noted below.