471:
29:
271:
was completed a year later. Designed as a zoned earth embankment structure with an impervious central core, a semi-pervious layer on either side of the core, and a layer of rock fill. The semi-pervious layer was built in 1 foot (0.30 m) layers and compacted. The rock fill laid up in 3 feet (0.91 m) layers without compaction.
257:
feeder canal from Banks Lake has a capacity of 26,000 cubic feet per second, Dry Falls Dam and the Main Canal headworks are near Coulee City. While not a part of the Dry Falls Dam, the Main Canal
Headworks was expanded to add a six pump/generating units. The Main Canal was widened from 50 feet (15 m) to 80 feet (24 m).
256:
Both North and Dry Falls Dams are rock-faced, earthfill dams. They were built to create Banks Lake, 27 miles (43 km) long as an equalizing reservoir, with storage capacity of 715,000 acre-feet for irrigation. The reverse flow, back to the
Columbia River, provides additional electrical power. The
270:
along the length of the dam. A continuous concrete wall was centered in the trench with footings at least 3 feet (0.91 m) deep. The wall prevents seepage of water under the dam, and is from 5 to 10 feet (1.5 to 3.0 m) high. The construction of the canal head works began in March 1948, and
265:
Originally known as the South Coulee Dam, Dry Falls Dam began construction in 1946. Roy L. Blair and
Company and James Crick and Sons, were awarded the contract for $ 2,771,887 to build the dam. Work began in mid-July. Included in the contract was the dam across the Grand Coulee, the approach
662:
337:
682:
667:
232:
and Dry Falls Dam stretches across the midsection of the Coulee. This allows the water pumped from the
Columbia River to fill the upper Grand Coulee, creating a large
289:
534:
585:
433:
442:
240:. Water from the reservoir is fed into the irrigation project's Main Canal, which runs south from Dry Falls Dam to another reservoir called
341:
687:
657:
210:
98:
55:
672:
364:
266:
channel, the headworks and control structure, and the initial reach to the main canal. A cutoff trench was created down to
405:
293:
544:
426:
677:
411:
202:
39:
419:
206:
198:
43:
213:
492:
487:
615:
233:
575:
228:, a formerly dry canyon, through the short Feeder Canal. Grand Coulee's north end is sealed by
605:
446:
389:
636:
241:
221:
460:
368:
470:
217:
167:
651:
620:
600:
560:
570:
565:
539:
518:
225:
113:
361:
610:
595:
513:
590:
508:
322:. Washington D.C.: United States Government Printing Office. 1964. p. 59.
237:
194:
152:
70:
57:
580:
245:
229:
28:
267:
415:
190:
469:
390:
https://www.usbr.gov/projects/facilities.php?region=Pacific
663:
Buildings and structures in Grant County, Washington
629:
553:
527:
501:
480:
453:
176:
166:
158:
148:
143:
135:
127:
119:
109:
104:
94:
86:
49:
35:
21:
336:United States Bureau of Reclamation (2012-05-17).
288:United States Bureau of Reclamation (2012-05-17).
554:Ice Age Floods Erosion & Deposition Features
314:
312:
310:
427:
8:
331:
329:
434:
420:
412:
27:
18:
683:1949 establishments in Washington (state)
338:"Dry Falls Dam: Hydraulics and Hydrology"
668:United States Bureau of Reclamation dams
320:The Story of the Columbia Basin Project
280:
443:Ice Age Floods National Geologic Trail
385:
383:
381:
379:
377:
7:
162:1,275,000 acre-feet (1.573 km)
99:United States Bureau of Reclamation
14:
172:278.3 square miles (721 km)
630:Related contemporaneous events
528:Ice Age Floods Glacial Residue
209:, it was built as part of the
189:is a rockfaced earthfill type
1:
545:Sims Corner Eskers and Kames
704:
688:Dams in the Columbia Basin
658:Dams in Washington (state)
180:27,000 acres (109 km)
467:
367:December 6, 2008, at the
131:9,800 feet (2,990 m)
26:
290:"Dry Falls Dam: General"
408:, Bureau of Reclamation
371:, Bureau of Reclamation
211:Bureau of Reclamation's
673:Dams completed in 1949
474:
454:Ice Age Glacial Floods
362:Columbia Basin Project
214:Columbia Basin Project
71:47.62000°N 119.30750°W
16:Dam in Washington, USA
493:Glacial Lake Columbia
488:Glacial Lake Missoula
473:
139:480 feet (150 m)
616:Columbia River Gorge
234:equalizing reservoir
123:123 feet (37 m)
76:47.62000; -119.30750
586:Drumheller Channels
576:Channeled Scablands
168:Catchment area
159:Total capacity
67: /
475:
678:Earth-filled dams
645:
644:
606:Touchet Formation
447:Pacific Northwest
224:, is pumped into
216:. Water from the
184:
183:
177:Surface area
136:Width (base)
105:Dam and spillways
87:Opening date
695:
637:Bonneville Flood
436:
429:
422:
413:
393:
387:
372:
359:
353:
352:
350:
349:
340:. Archived from
333:
324:
323:
316:
305:
304:
302:
301:
292:. Archived from
285:
242:Billy Clapp Lake
222:Grand Coulee Dam
82:
81:
79:
78:
77:
72:
68:
65:
64:
63:
60:
31:
19:
703:
702:
698:
697:
696:
694:
693:
692:
648:
647:
646:
641:
625:
549:
535:Withrow Moraine
523:
502:Temporary Lakes
497:
476:
465:
461:Missoula Floods
449:
440:
402:
397:
396:
388:
375:
369:Wayback Machine
360:
356:
347:
345:
335:
334:
327:
318:
317:
308:
299:
297:
287:
286:
282:
277:
263:
254:
220:, impounded by
75:
73:
69:
66:
61:
58:
56:
54:
53:
44:Washington, USA
17:
12:
11:
5:
701:
699:
691:
690:
685:
680:
675:
670:
665:
660:
650:
649:
643:
642:
640:
639:
633:
631:
627:
626:
624:
623:
618:
613:
608:
603:
598:
593:
588:
583:
578:
573:
568:
563:
557:
555:
551:
550:
548:
547:
542:
537:
531:
529:
525:
524:
522:
521:
516:
511:
505:
503:
499:
498:
496:
495:
490:
484:
482:
478:
477:
468:
466:
464:
463:
457:
455:
451:
450:
441:
439:
438:
431:
424:
416:
410:
409:
401:
400:External links
398:
395:
394:
373:
354:
325:
306:
279:
278:
276:
273:
262:
259:
253:
250:
218:Columbia River
182:
181:
178:
174:
173:
170:
164:
163:
160:
156:
155:
150:
146:
145:
141:
140:
137:
133:
132:
129:
125:
124:
121:
117:
116:
111:
107:
106:
102:
101:
96:
92:
91:
88:
84:
83:
51:
47:
46:
37:
33:
32:
24:
23:
15:
13:
10:
9:
6:
4:
3:
2:
700:
689:
686:
684:
681:
679:
676:
674:
671:
669:
666:
664:
661:
659:
656:
655:
653:
638:
635:
634:
632:
628:
622:
621:Alameda Ridge
619:
617:
614:
612:
609:
607:
604:
602:
601:Palouse Falls
599:
597:
594:
592:
589:
587:
584:
582:
579:
577:
574:
572:
569:
567:
564:
562:
561:Foster Coulee
559:
558:
556:
552:
546:
543:
541:
538:
536:
533:
532:
530:
526:
520:
517:
515:
512:
510:
507:
506:
504:
500:
494:
491:
489:
486:
485:
483:
481:Glacial Lakes
479:
472:
462:
459:
458:
456:
452:
448:
444:
437:
432:
430:
425:
423:
418:
417:
414:
407:
406:Dry Falls Dam
404:
403:
399:
391:
386:
384:
382:
380:
378:
374:
370:
366:
363:
358:
355:
344:on 2015-06-16
343:
339:
332:
330:
326:
321:
315:
313:
311:
307:
296:on 2015-06-16
295:
291:
284:
281:
274:
272:
269:
260:
258:
251:
249:
247:
243:
239:
235:
231:
227:
223:
219:
215:
212:
208:
204:
201:. Located in
200:
196:
192:
188:
187:Dry Falls Dam
179:
175:
171:
169:
165:
161:
157:
154:
151:
147:
142:
138:
134:
130:
126:
122:
118:
115:
112:
108:
103:
100:
97:
93:
89:
85:
80:
52:
48:
45:
41:
38:
34:
30:
25:
22:Dry Falls Dam
20:
571:Moses Coulee
566:Grand Coulee
540:Boulder Park
519:Lake Allison
357:
346:. Retrieved
342:the original
319:
298:. Retrieved
294:the original
283:
264:
255:
244:, formed by
226:Grand Coulee
203:Grant County
186:
185:
114:Grand Coulee
40:Grant County
611:Wallula Gap
596:Corfu Slide
514:Lake Condon
207:Coulee City
95:Operator(s)
74: /
62:119°18′27″W
50:Coordinates
652:Categories
591:Crab Creek
509:Lake Lewis
348:2015-01-23
300:2015-01-23
275:References
238:Banks Lake
199:Washington
195:U.S. state
153:Banks Lake
59:47°37′12″N
581:Dry Falls
392:Northwest
246:Pinto Dam
236:known as
230:North Dam
144:Reservoir
365:Archived
110:Impounds
36:Location
445:in the
268:bedrock
261:History
193:in the
149:Creates
128:Length
120:Height
252:Works
205:near
90:1949
197:of
191:dam
654::
376:^
328:^
309:^
248:.
42:,
435:e
428:t
421:v
351:.
303:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
