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BLACK HILLS CORP /SD/

SIC 4911 · Electric Services
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$BKH

BLACK HILLS CORP /SD/

CIK:0001130464|SEC Filings

INDENTURES

EX-4.1
tm2527704d1_ex4-1.htm
Oct 2, 2025
EX-4.1
tm2413281d5_ex4-1.htm
May 16, 2024
EX-4.1
tm2326174d1_ex4-1.htm
Sep 15, 2023
EX-4.1
tm2125215d4_ex4-1.htm
Aug 26, 2021
EX-4.1
tm2022285d4_ex4-1.htm
Jun 17, 2020
EX-4.5
bkhex-45descriptionofs.htm
Feb 14, 2020
EX-4.1
tv530573_ex4-1.htm
Oct 4, 2019
EX-4.2
a18-18564_4ex4d2.htm
Aug 17, 2018
EX-4.1
a16-17027_1ex4d1.htm
Aug 19, 2016
EX-4.1
a16-1059_4ex4d1.htm
Jan 13, 2016
EX-4.1
a15-22831_8ex4d1.htm
Nov 23, 2015
EX-4.2
a15-22831_8ex4d2.htm
Nov 23, 2015
EX-4.4
a15-22831_8ex4d4.htm
Nov 23, 2015
EX-4.5
a2226570zex-4_5.htm
Nov 16, 2015
EX-4.21
a09-31821_7ex4d21.htm
Oct 27, 2009
EX-4.16
a2195001zex-4_16.htm
Oct 22, 2009
EX-4.17
a2195001zex-4_17.htm
Oct 22, 2009
EX-4.18
a2195001zex-4_18.htm
Oct 22, 2009
EX-4.19
a2195001zex-4_19.htm
Oct 22, 2009
EX-4.20
a2195001zex-4_20.htm
Oct 22, 2009