446:
segment of TANC's 500 kV line from the
Sacramento River crossing south to the Tracy Substation has delta pylons like those found on the Captain Jack-Olinda segment, although they are slightly different. This is because south of the Sacramento River crossing, the original 230 kV line paralleled the two PG&E 500 kV lines almost all the way to Tracy Substation. In order to meet separation requirements, a new alignment for the 500 kV line had to be built some distance to the east, with the exception of the San Joaquin River crossing, which utilizes the former 230 kV facilities. This alignment can be seen from
510:
498:
28:
478:
20:
542:
530:, 20 feet (6 m) of snow can accumulate near Grizzly Peak's 6,250 feet (1,905 m)-summit. The extreme snowfall there can cause ice and snow to accumulate on the insulators and the wires and sometimes lead to power outages when the wires snap in these extreme conditions. This high-elevation segment of 500 kV line is also said to be problematic.
445:
The TANC line changes design at the Olinda substation from the delta pylon pictured at the
Interstate 5 crossing to the two-level pylon pictured above. This is because much of the segment between the Olinda and Tracy substations was constructed by upgrading an existing double-circuit 230 kV line. The
442:, whereas the PG&E lines are only double-bundled, or two wires per phase. In addition, the tower's design is strikingly different from the lighter and wider PG&E tower, and the design also changes significantly as one goes from north to south on WAPA's 346 mi (557 km) 500 kV line.
343:
substation southeast of the
Captain Jack substation. One circuit of a rare, tall BPA dual-circuit and one single-circuit 500 kV line connect Captain Jack substation with Malin substation. The PG&E and PacifiCorp 500 kV line both head south together across the Modoc Plateau, generally following
465:
As for the pylons of the PG&E and PacifiCorp Round
Mountain-Malin parallel lines, the PG&E line uses the same tower type as the PG&E Table Mountain-Round Mountain 500 kV segment does. The PacifiCorp 500 kV line uses a pylon that looks similar to the pylon used in WAPA's Olinda-Captain
330:
towards Los Banos
Substation. The PG&E line that the dual-circuit line intersects used to be a second Los Banos-Tesla power line that was split apart. A PG&E tower was removed, although the foundation for the tower is still visible. New towers were built to accompany the line changes. One
429:
as lines of bare, treeless ground. This is because the power lines here run through forests of conifer trees which appear dark green-green from space. The land through here has been logged and sometimes clear-cut to create a right-of-way for the power lines because a wildfire could start when an
146:
Substation near Malin to Olinda
Substation south of Redding. It is a part of California-Oregon Transmission Project. The project manager is the Transmission Agency of Northern California (TANC), a joint venture of several public utilities. The line was completed in 1993.
525:
Since TANC's
Captain Jack-Olinda 500 kV wire rises to almost 6,000 feet (1,800 m) as the line crosses the rugged mountains near Grizzly Peak, that section of 500 kV line is covered with large amounts of snow during the winter. Despite its location far from the
305:
the line turns and runs parallel with the two PG&E 500 kV lines. All three lines cross both the
Sacramento and San Joaquin Rivers on very large pylons. The TANC line turns away from the PG&E lines and heads for another large substation near Tracy.
880:
214:. Leaving Captain Jack substation, the line first heads southeast as a single-circuit line and runs parallel with the other two 500 kV lines across the Modoc Plateau. It then turns west and climbs in elevation and reaches its highest point near
186:) north of Malin and 6.5 mi (10.5 km) northwest of the Malin Substation, where the other 500 kV lines start (owned by PacifiCorp and PG&E). These substations, just north of the California-Oregon border, link to both the
331:
circuit turns north back into Tesla
Substation, effectively linking the Tracy Substation with the Tesla Substation. The other circuit turns south to head for the Los Banos Substation as a southern extension of the third 500 kV line.
873:
509:
866:
541:
344:
the lone WAPA line at a distance. The parallel lines then turn southwestward climb to about 5,400 feet (1,645 m), before descending and turning south once again. Both lines enter the
477:
580:
458:. A portion of the former 230-kV line south of the Sacramento River remains in service today as part of the 69 kV system that serves the pumping stations on the
210:
Path 66 consists of the northernmost segment of TANC's 346 mi (557 km) 500 kV line from
Captain Jack substation to Tracy substation in California's
1117:
771:
746:
497:
913:
51:
455:
923:
155:
Path 66 is composed of one segment of TANC, PG&E and PacifiCorp 500 kV lines. The TANC line route starts at Captain Jack Substation (
709:
853:
801:
242:. Near Olinda, it turns south and enters Olinda substation. Here the line interconnects with transmission lines carrying power from
127:
587:
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918:
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274:(about four miles (6.5 km) to the west) on its way south, although it is barely visible. It also parallels two 230-kV
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This TANC 500 kV power line, unlike its PG&E counterparts, is triple-bundled, meaning that it has three wires per
211:
61:
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27:
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Map of Path 66 located in the upper section, left of the other two 500 kV lines south of Round Mountain substation
390:
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215:
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775:
750:
908:
270:. The line proceeds south and then southeast along the western edge of the Sacramento Valley. It parallels
322:. The line terminates where it intersects with one of the two PG&E 500 kV lines as the PG&E heads
235:
425:
The northern part of this electrical transmission corridor (including Path 15) is visible from space and
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298:
115:
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1122:
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302:
283:
123:
58:
19:
515:
PG&E 500 kV Table Mountain-Vaca Dixon line spanning over the WAPA line (Olinda-Tracy segment).
459:
319:
230:, it turns southwest and the line is joined by two 230-kV lines as all three lines head into the
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electrical arc occurs between the wires and a tree if they come close enough to each other.
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from north to south. From south to north, the system can transmit only 3,675 MW of power.
830:
678:
414:
348:
substation. This is the terminus of the Path 66 portion of the parallel 500 kV wires.
1106:
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340:
287:
218:
at about 6,000 ft (1,830 m). From there, it heads south, spanning over the
80:
705:
426:
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31:
A dual-circuit 500 kV line forming a part of the connection between Path 66 and
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line, although the tower structures change (see photos below) to a two-level
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lines for much of this segment and another WAPA 230 kV line. There is a
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1001:
986:
558:
255:
32:
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Route descriptions and tower designs are based on Google Earth images.
310:
Connecting wires to Path 15 - Tracy to intersection with PG&E wire
667:
Paths 61-70 (Report). Western Electricity Coordinating Council. 2006.
65:
323:
26:
18:
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73:
55:
862:
611:
293:
The line crosses the two separated PG&E 500-kV lines, near
586:. Transmission Utilization Group. 2011-05-04. Archived from
318:
500 kV line suspended by a three-level pylon located in the
142:
and were completed in the 1960s. The third line runs from
290:
to boost the line across the long Olinda-Tracy segment.
314:
From Tracy Substation, the line again to a rare, tall,
262:
From Olinda Substation, the TANC 500 kV continues as a
483:
WAPA Olinda-Tracy 500 kV transmission line outside of
72:. Their combined power transmission capacity is 4800
54:(WECC), is a corridor of three roughly parallel 500
1075:
932:
901:
829:. Western Area Power Administration. Archived from
804:. Western Area Power Administration. Archived from
772:"Picture of WAPA's 500 kV line from Interstate 5"
747:"Picture of TANC's 500 kV line from Interstate 5"
16:Corridor of three roughly parallel power lines
874:
827:"Calif. snow gets SN crew out to repair line"
802:"SN foreman outlines 3 decades of t-line ops"
8:
614:. Transmission Agency of Northern California
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859:
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914:Western Electricity Coordinating Council
612:"California-Oregon Transmission Project"
339:The other two 500 kV lines start in the
52:Western Electricity Coordinating Council
569:
537:
473:
924:California Independent System Operator
796:
794:
792:
662:
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575:
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7:
774:. WestCoastRoads.com. Archived from
749:. WestCoastRoads.com. Archived from
701:
699:
697:
23:Pacific Intertie transmission routes
1118:Energy infrastructure in California
728:. Western Area Power Administration
138:jointly. These lines are a part of
14:
335:Path 66 - Malin to Round Mountain
128:Western Area Power Administration
64:connecting the electric grids of
919:Power transmission in California
540:
508:
496:
476:
206:Path 66 - Captain Jack to Olinda
79:Two of the power lines run from
679:"California Transmission Lines"
192:Bonneville Power Administration
1:
450:and the western part of the
434:Tower design and differences
389:Series capacitor station in
238:, it turns west and crosses
891:electric power transmission
409:Path 66 can transmit 4,800
405:Power transmission capacity
361:TANC line (North to South)
1139:
503:PG&E wires near Tracy.
130:, with the other owned by
126:. One of them is owned by
40:California Oregon Intertie
581:"COI Utilization Report"
372:PG&E and PacifiCorp
276:Pacific Gas and Electric
234:. As the line passes by
174:42.079750°N 121.390000°W
132:Pacific Gas and Electric
122:Substation northeast of
102:42.005750°N 121.316583°W
1113:Western Interconnection
909:Western Interconnection
723:"Trees and Power Lines"
456:Sacramento River Delta
179:42.079750; -121.390000
107:42.005750; -121.316583
36:
24:
895:Western United States
421:Environmental impacts
384:Connecting power line
116:Klamath Falls, Oregon
30:
22:
254:Connecting wires to
1091:Pacific DC Intertie
934:Alternating current
170: /
140:Pacific AC Intertie
124:Redding, California
98: /
59:alternating current
460:Contra Costa Canal
320:San Joaquin Valley
37:
25:
1100:
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893:corridors of the
452:San Joaquin River
258:- Olinda to Tracy
232:Sacramento Valley
200:Pacific Northwest
46:), identified as
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280:series capacitor
220:Stonecoal Valley
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454:portion of the
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114:) southeast of
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1077:Direct current
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848:External links
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708:elevation for
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466:Jack segment.
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379:Round Mountain
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346:Round Mountain
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212:Central Valley
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833:on 2012-12-14
832:
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808:on 2007-09-27
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778:on 2007-09-27
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528:Pacific Ocean
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489:Interstate 80
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165:121°23′24.0″W
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93:121°18′59.7″W
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902:Transmission
835:. Retrieved
831:the original
821:
810:. Retrieved
806:the original
780:. Retrieved
776:the original
766:
755:. Retrieved
751:the original
741:
730:. Retrieved
717:
712:coordinates.
706:Google Earth
685:. Retrieved
673:
616:. Retrieved
606:
595:. Retrieved
588:the original
524:
464:
444:
437:
427:Google Earth
424:
408:
371:
365:Captain Jack
360:
338:
313:
292:
272:Interstate 5
261:
240:Interstate 5
216:Grizzly Peak
209:
162:42°04′47.1″N
154:
144:Captain Jack
83:Substation (
78:
47:
43:
39:
38:
352:Substations
248:Keswick Dam
177: /
105: /
90:42°0′20.7″N
62:power lines
1123:PacifiCorp
1107:Categories
977:Path 10-11
942:One Nevada
837:2007-09-20
812:2007-09-20
782:2007-09-20
757:2007-09-20
732:2007-09-20
687:2007-09-20
618:2014-03-31
597:2014-03-30
565:References
328:substation
244:Shasta Dam
236:Cottonwood
188:PacifiCorp
136:PacifiCorp
70:California
1093:(Path 65)
485:Vacaville
448:Highway 4
299:Rio Vista
224:Pit River
854:WAPA.gov
553:See also
521:Problems
295:Woodland
222:and the
1085:Path 27
1067:Path 75
1062:Path 73
1057:Path 71
1052:Path 66
1047:Path 64
1042:Path 63
1037:Path 62
1032:Path 61
1027:Path 54
1022:Path 51
1017:Path 49
1012:Path 46
1007:Path 45
1002:Path 26
997:Path 22
992:Path 21
987:Path 15
982:Path 14
559:Path 26
487:, near
357:Path 66
303:Antioch
301:. Near
284:Maxwell
256:Path 15
226:. Near
198:in the
48:Path 66
33:Path 15
972:Path 9
967:Path 8
962:Path 6
957:Path 5
952:Path 4
947:Path 3
889:Major
400:Issues
368:Olinda
194:(BPA)
66:Oregon
726:(PDF)
682:(PDF)
591:(PDF)
584:(PDF)
440:phase
395:Tracy
376:Malin
341:Malin
324:south
268:pylon
196:grids
151:Route
81:Malin
710:GNIS
297:and
246:and
190:and
134:and
68:and
534:Map
413:of
286:in
118:to
50:by
44:COI
1109::
791:^
696:^
659:^
627:^
572:^
462:.
411:MW
250:.
202:.
76:.
74:MW
56:kV
882:e
875:t
868:v
840:.
815:.
785:.
760:.
735:.
690:.
621:.
600:.
491:.
42:(
35:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
