Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Tables)

v3.20.2
Commitments and Contingencies (Tables)
 9 Months Ended
Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Schedule of current maturities of contractual obligation
Aggregate future minimum payments under these obligations in effect at September 30, 2020 are as follows (in thousands):
Year ended December 31: Capital Spend Commitments
Minimum Purchase Commitments(a)
Remainder of 2020 $ 3,175  $ 4,307 
2021 —  1,129 
2022 —  98 
2023 —  8 
2024 —  — 
Thereafter —  — 
$ 3,175  $ 5,542 
a.     Included in these amounts are sand purchase commitments of $4.0 million. Pricing for certain sand purchase agreements is variable and, therefore, the total sand purchase commitments could be as much as $4.7 million.
Schedule of letters of credit The letters of credit are categorized below (in thousands):
September 30, December 31,
2020 2019
Environmental remediation $ 4,477  $ 4,182 
Insurance programs 4,105  4,105 
Rail car commitments 455  455 
Total letters of credit $ 9,037  $ 8,742