Document Format Files
| Seq | Description | Document | Type | Size |
|---|---|---|---|---|
| 1 | 8-K | cpk-20250801.htm iXBRL | 8-K | 38099 |
| 2 | EX-4.1 | cpknpa8-1x25.htm | EX-4.1 | 289344 |
| 7 | cpknpa8-1x25001.jpg | GRAPHIC | 51914 | |
| 8 | cpknpa8-1x25002.jpg | GRAPHIC | 167362 | |
| 9 | cpknpa8-1x25003.jpg | GRAPHIC | 174522 | |
| 10 | cpknpa8-1x25004.jpg | GRAPHIC | 172129 | |
| 11 | cpknpa8-1x25005.jpg | GRAPHIC | 78504 | |
| 12 | cpknpa8-1x25006.jpg | GRAPHIC | 96914 | |
| 13 | cpknpa8-1x25007.jpg | GRAPHIC | 185382 | |
| 14 | cpknpa8-1x25008.jpg | GRAPHIC | 271790 | |
| 15 | cpknpa8-1x25009.jpg | GRAPHIC | 264484 | |
| 16 | cpknpa8-1x25010.jpg | GRAPHIC | 255114 | |
| 17 | cpknpa8-1x25011.jpg | GRAPHIC | 261595 | |
| 18 | cpknpa8-1x25012.jpg | GRAPHIC | 297021 | |
| 19 | cpknpa8-1x25013.jpg | GRAPHIC | 308519 | |
| 20 | cpknpa8-1x25014.jpg | GRAPHIC | 263330 | |
| 21 | cpknpa8-1x25015.jpg | GRAPHIC | 273423 | |
| 22 | cpknpa8-1x25016.jpg | GRAPHIC | 266035 | |
| 23 | cpknpa8-1x25017.jpg | GRAPHIC | 245439 | |
| 24 | cpknpa8-1x25018.jpg | GRAPHIC | 223491 | |
| 25 | cpknpa8-1x25019.jpg | GRAPHIC | 274164 | |
| 26 | cpknpa8-1x25020.jpg | GRAPHIC | 251591 | |
| 27 | cpknpa8-1x25021.jpg | GRAPHIC | 240426 | |
| 28 | cpknpa8-1x25022.jpg | GRAPHIC | 239088 | |
| 29 | cpknpa8-1x25023.jpg | GRAPHIC | 261556 | |
| 30 | cpknpa8-1x25024.jpg | GRAPHIC | 249342 | |
| 31 | cpknpa8-1x25025.jpg | GRAPHIC | 276763 | |
| 32 | cpknpa8-1x25026.jpg | GRAPHIC | 275539 | |
| 33 | cpknpa8-1x25027.jpg | GRAPHIC | 294104 | |
| 34 | cpknpa8-1x25028.jpg | GRAPHIC | 281964 | |
| 35 | cpknpa8-1x25029.jpg | GRAPHIC | 302711 | |
| 36 | cpknpa8-1x25030.jpg | GRAPHIC | 251851 | |
| 37 | cpknpa8-1x25031.jpg | GRAPHIC | 264242 | |
| 38 | cpknpa8-1x25032.jpg | GRAPHIC | 263699 | |
| 39 | cpknpa8-1x25033.jpg | GRAPHIC | 253365 | |
| 40 | cpknpa8-1x25034.jpg | GRAPHIC | 271015 | |
| 41 | cpknpa8-1x25035.jpg | GRAPHIC | 261469 | |
| 42 | cpknpa8-1x25036.jpg | GRAPHIC | 246594 | |
| 43 | cpknpa8-1x25037.jpg | GRAPHIC | 278108 | |
| 44 | cpknpa8-1x25038.jpg | GRAPHIC | 254565 | |
| 45 | cpknpa8-1x25039.jpg | GRAPHIC | 290571 | |
| 46 | cpknpa8-1x25040.jpg | GRAPHIC | 307273 | |
| 47 | cpknpa8-1x25041.jpg | GRAPHIC | 282434 | |
| 48 | cpknpa8-1x25042.jpg | GRAPHIC | 315880 | |
| 49 | cpknpa8-1x25043.jpg | GRAPHIC | 283501 | |
| 50 | cpknpa8-1x25044.jpg | GRAPHIC | 250180 | |
| 51 | cpknpa8-1x25045.jpg | GRAPHIC | 270413 | |
| 52 | cpknpa8-1x25046.jpg | GRAPHIC | 266214 | |
| 53 | cpknpa8-1x25047.jpg | GRAPHIC | 314981 | |
| 54 | cpknpa8-1x25048.jpg | GRAPHIC | 281198 | |
| 55 | cpknpa8-1x25049.jpg | GRAPHIC | 279498 | |
| 56 | cpknpa8-1x25050.jpg | GRAPHIC | 137676 | |
| 57 | cpknpa8-1x25051.jpg | GRAPHIC | 53864 | |
| 58 | cpknpa8-1x25052.jpg | GRAPHIC | 65358 | |
| 59 | cpknpa8-1x25053.jpg | GRAPHIC | 48577 | |
| 60 | cpknpa8-1x25054.jpg | GRAPHIC | 46671 | |
| 61 | cpknpa8-1x25055.jpg | GRAPHIC | 71148 | |
| 62 | cpknpa8-1x25056.jpg | GRAPHIC | 44706 | |
| 63 | cpknpa8-1x25057.jpg | GRAPHIC | 44259 | |
| 64 | cpknpa8-1x25058.jpg | GRAPHIC | 52731 | |
| 65 | cpknpa8-1x25059.jpg | GRAPHIC | 42096 | |
| 66 | cpknpa8-1x25060.jpg | GRAPHIC | 50310 | |
| 67 | cpknpa8-1x25061.jpg | GRAPHIC | 43950 | |
| 68 | cpknpa8-1x25062.jpg | GRAPHIC | 243115 | |
| 69 | cpknpa8-1x25063.jpg | GRAPHIC | 223805 | |
| 70 | cpknpa8-1x25064.jpg | GRAPHIC | 227345 | |
| 71 | cpknpa8-1x25065.jpg | GRAPHIC | 184917 | |
| 72 | cpknpa8-1x25066.jpg | GRAPHIC | 226242 | |
| 73 | cpknpa8-1x25067.jpg | GRAPHIC | 220803 | |
| 74 | cpknpa8-1x25068.jpg | GRAPHIC | 241853 | |
| 75 | cpknpa8-1x25069.jpg | GRAPHIC | 198110 | |
| 76 | cpknpa8-1x25070.jpg | GRAPHIC | 209291 | |
| 77 | cpknpa8-1x25071.jpg | GRAPHIC | 80720 | |
| 78 | cpknpa8-1x25072.jpg | GRAPHIC | 253047 | |
| 79 | cpknpa8-1x25073.jpg | GRAPHIC | 106637 | |
| 80 | cpknpa8-1x25074.jpg | GRAPHIC | 253038 | |
| 81 | cpknpa8-1x25075.jpg | GRAPHIC | 106706 | |
| 82 | cpknpa8-1x25076.jpg | GRAPHIC | 254369 | |
| 83 | cpknpa8-1x25077.jpg | GRAPHIC | 106635 | |
| 84 | cpknpa8-1x25078.jpg | GRAPHIC | 208822 | |
| 85 | cpknpa8-1x25079.jpg | GRAPHIC | 231518 | |
| 86 | cpknpa8-1x25080.jpg | GRAPHIC | 239243 | |
| 87 | cpknpa8-1x25081.jpg | GRAPHIC | 260082 | |
| 88 | cpknpa8-1x25082.jpg | GRAPHIC | 232574 | |
| 89 | cpknpa8-1x25083.jpg | GRAPHIC | 120748 | |
| 90 | cpknpa8-1x25084.jpg | GRAPHIC | 189986 | |
| 91 | cpknpa8-1x25085.jpg | GRAPHIC | 197191 | |
| 92 | cpknpa8-1x25086.jpg | GRAPHIC | 282163 | |
| 93 | cpknpa8-1x25087.jpg | GRAPHIC | 70218 | |
| 94 | cpknpa8-1x25088.jpg | GRAPHIC | 27550 | |
| 95 | cpknpa8-1x25089.jpg | GRAPHIC | 196459 | |
| 96 | cpknpa8-1x25090.jpg | GRAPHIC | 228286 | |
| 97 | cpknpa8-1x25091.jpg | GRAPHIC | 207690 | |
| 98 | cpknpa8-1x25092.jpg | GRAPHIC | 262172 | |
| 99 | cpknpa8-1x25093.jpg | GRAPHIC | 251247 | |
| 100 | cpknpa8-1x25094.jpg | GRAPHIC | 27253 | |
| 101 | cpknpa8-1x25095.jpg | GRAPHIC | 172866 | |
| 102 | cpknpa8-1x25096.jpg | GRAPHIC | 28834 | |
| 103 | cpknpa8-1x25097.jpg | GRAPHIC | 212204 | |
| 104 | cpknpa8-1x25098.jpg | GRAPHIC | 81893 | |
| 105 | cpknpa8-1x25099.jpg | GRAPHIC | 51052 | |
| 106 | cpknpa8-1x25100.jpg | GRAPHIC | 151441 | |
| 107 | cpknpa8-1x25101.jpg | GRAPHIC | 184376 | |
| 108 | cpknpa8-1x25102.jpg | GRAPHIC | 87333 | |
| 109 | cpknpa8-1x25103.jpg | GRAPHIC | 28544 | |
| 110 | cpknpa8-1x25104.jpg | GRAPHIC | 122225 | |
| 111 | cpknpa8-1x25105.jpg | GRAPHIC | 93454 | |
| 112 | cpknpa8-1x25106.jpg | GRAPHIC | 57141 | |
| 113 | cpknpa8-1x25107.jpg | GRAPHIC | 81708 | |
| 114 | cpknpa8-1x25108.jpg | GRAPHIC | 42090 | |
| 115 | cpknpa8-1x25109.jpg | GRAPHIC | 102107 | |
| 116 | cpknpa8-1x25110.jpg | GRAPHIC | 43656 | |
| 117 | cpknpa8-1x25111.jpg | GRAPHIC | 88422 | |
| 118 | cpknpa8-1x25112.jpg | GRAPHIC | 43447 | |
| 119 | cpknpa8-1x25113.jpg | GRAPHIC | 96153 | |
| 120 | cpknpa8-1x25114.jpg | GRAPHIC | 33219 | |
| 121 | cpknpa8-1x25115.jpg | GRAPHIC | 97589 | |
| 122 | cpknpa8-1x25116.jpg | GRAPHIC | 33243 | |
| 123 | cpknpa8-1x25117.jpg | GRAPHIC | 56754 | |
| 124 | cpknpa8-1x25118.jpg | GRAPHIC | 110602 | |
| 125 | cpknpa8-1x25119.jpg | GRAPHIC | 36874 | |
| 126 | cpknpa8-1x25120.jpg | GRAPHIC | 83704 | |
| 127 | cpknpa8-1x25121.jpg | GRAPHIC | 42310 | |
| 128 | cpknpa8-1x25122.jpg | GRAPHIC | 80620 | |
| 129 | cpknpa8-1x25123.jpg | GRAPHIC | 42321 | |
| 130 | cpknpa8-1x25124.jpg | GRAPHIC | 85782 | |
| 131 | cpknpa8-1x25125.jpg | GRAPHIC | 42454 | |
| 132 | cpknpa8-1x25126.jpg | GRAPHIC | 81945 | |
| 133 | cpknpa8-1x25127.jpg | GRAPHIC | 42440 | |
| 134 | cpknpa8-1x25128.jpg | GRAPHIC | 92040 | |
| 135 | cpknpa8-1x25129.jpg | GRAPHIC | 80661 | |
| 136 | cpknpa8-1x25130.jpg | GRAPHIC | 34025 | |
| 137 | cpknpa8-1x25131.jpg | GRAPHIC | 77702 | |
| 138 | cpknpa8-1x25132.jpg | GRAPHIC | 50288 | |
| Complete submission text file | 0001628280-25-038811.txt | 31347211 |
Data Files
| Seq | Description | Document | Type | Size |
|---|---|---|---|---|
| 3 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | cpk-20250801.xsd | EX-101.SCH | 2095 |
| 4 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | cpk-20250801_def.xml | EX-101.DEF | 13026 |
| 5 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | cpk-20250801_lab.xml | EX-101.LAB | 23733 |
| 6 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | cpk-20250801_pre.xml | EX-101.PRE | 25579 |
| 149 | EXTRACTED XBRL INSTANCE DOCUMENT | cpk-20250801_htm.xml | XML | 2718 |
EIN.: 510064146 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 8-K | Act: 34 | File No.: 001-11590 | Film No.: 251193441
SIC: 4923 Natural Gas Transmisison & Distribution
(CF Office: 01 Energy & Transportation)