Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000073020-11-000006-index-headers.html | 2011-05-04 11:26:12 | |
| 0000073020-11-000006-index.html | 2011-05-04 11:26:12 | |
| 0000073020-11-000006.txt | 2011-05-04 11:26:12 | |
 0000073020-11-000006-xbrl.zip | 59885 | 2011-05-04 11:26:12 |
| defnref.xml | 25070 | 2011-05-04 11:26:12 |
| ex10-1.htm | 1173692 | 2011-05-04 11:26:12 |
| ex12.htm | 51740 | 2011-05-04 11:26:12 |
| ex31-1.htm | 8908 | 2011-05-04 11:26:12 |
| ex31-2.htm | 8986 | 2011-05-04 11:26:12 |
| ex32.htm | 7325 | 2011-05-04 11:26:12 |
 ex_map.jpg | 102689 | 2011-05-04 11:26:12 |
| FilingSummary.xml | 10861 | 2011-05-04 11:26:12 |
| Financial_Report.xls | 458191 | 2011-05-04 11:26:12 |
 form10q-20090.jpg | 3222 | 2011-05-04 11:26:12 |
| form10q.htm | 1010051 | 2011-05-04 11:26:12 |
| nwn-20110331.xml | 461219 | 2011-05-04 11:26:12 |
| nwn-20110331.xsd | 25238 | 2011-05-04 11:26:12 |
| nwn-20110331_cal.xml | 60823 | 2011-05-04 11:26:12 |
| nwn-20110331_lab.xml | 158391 | 2011-05-04 11:26:12 |
| nwn-20110331_pre.xml | 129056 | 2011-05-04 11:26:12 |
| R1.xml | 40814 | 2011-05-04 11:26:12 |
| R10.xml | 11061 | 2011-05-04 11:26:12 |
| R11.xml | 23808 | 2011-05-04 11:26:12 |
| R12.xml | 19476 | 2011-05-04 11:26:12 |
| R13.xml | 18257 | 2011-05-04 11:26:12 |
| R14.xml | 43461 | 2011-05-04 11:26:12 |
| R15.xml | 21576 | 2011-05-04 11:26:12 |
| R16.xml | 31105 | 2011-05-04 11:26:12 |
| R17.xml | 18415 | 2011-05-04 11:26:12 |
| R18.xml | 65284 | 2011-05-04 11:26:12 |
| R19.xml | 96175 | 2011-05-04 11:26:12 |
| R2.xml | 64611 | 2011-05-04 11:26:12 |
| R20.xml | 15825 | 2011-05-04 11:26:12 |
| R21.xml | 44981 | 2011-05-04 11:26:12 |
| R3.xml | 170738 | 2011-05-04 11:26:12 |
| R4.xml | 14341 | 2011-05-04 11:26:12 |
| R5.xml | 105607 | 2011-05-04 11:26:12 |
| R6.xml | 16606 | 2011-05-04 11:26:12 |
| R7.xml | 72961 | 2011-05-04 11:26:12 |
| R8.xml | 21997 | 2011-05-04 11:26:12 |
| R9.xml | 44971 | 2011-05-04 11:26:12 |