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Guarantees (Tables)
12 Months Ended
Dec. 31, 2018
Guarantees [Abstract]  
Schedule of Guarantor Obligations
We had the following guarantees in place as of (in thousands):
 
Maximum Exposure at
 
Nature of Guarantee
December 31, 2018
Expiration
Indemnification for subsidiary reclamation/surety bonds (a)
$
54,683

Ongoing
Contract performance guarantee (b)
39,807

December 2019
 
$
94,490

 
_______________________
(a)
We have guarantees in place for reclamation and surety bonds for our subsidiaries. The guarantees were entered into in the normal course of business. To the extent liabilities are incurred as a result of activities covered by the surety bonds, such liabilities are included in our Consolidated Balance Sheets.
(b)
BHC has guaranteed the full and complete payment and performance on behalf of Black Hills Electric Generation for construction of the Busch Ranch II Wind Farm. The guarantee terminates when BHC or Black Hills Electric Generation has paid for and performed all guaranteed obligations. The guarantee decreases as progress payments are made.