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| 0001140361-12-021972.txt | 2012-04-30 17:12:30 | |
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| ex31_01.htm | 16824 | 2012-04-30 17:12:30 |
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| Financial_Report.xls | 630181 | 2012-04-30 17:12:30 |
| form10q.htm | 1093549 | 2012-04-30 17:12:30 |
| psco-20120331.xml | 685055 | 2012-04-30 17:12:30 |
| psco-20120331.xsd | 15320 | 2012-04-30 17:12:30 |
| psco-20120331_cal.xml | 61404 | 2012-04-30 17:12:30 |
| psco-20120331_lab.xml | 239084 | 2012-04-30 17:12:30 |
| psco-20120331_pre.xml | 122734 | 2012-04-30 17:12:30 |
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| R20.htm | 41035 | 2012-04-30 17:12:30 |
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