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See also: List of nuclear weapons tests of the United States
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Operation Bowline
Bowline Schooner 001d.jpg
Bowline Schooner
Information
Country United States
Test site
  • NTS Area 12, Rainier Mesa
  • NTS Area 16, Shoshone Mountain
  • NTS Area 19, 20, Pahute Mesa
  • NTS Areas 5, 11, Frenchman Flat
  • NTS, Areas 1–4, 6–10, Yucca Flat
Period 1968–1969
Number of tests 47
Test type cratering, underground shaft, tunnel
Max. yield 1.2 megatonnes of TNT (5.0 PJ)
Navigation
Previous test series Operation Crosstie
Next test series Operation Mandrel

The United States's Bowline nuclear test series was a group of 47 nuclear tests conducted in 1968–1969. These tests followed the Operation Crosstie series and preceded the Operation Mandrel series.

United States' Bowline series tests and detonations
Name Date time (UT) Local time zone Location Elevation + height Delivery
Purpose		 Device Yield Fallout References Notes
Spud July 17, 1968 14:00:00.04 PST (–8 hrs)
 NTS Area U3fy 37°00′03″N 115°59′59″W / 37.00095°N 115.99962°W / 37.00095; -115.99962 (Spud) 1,178 m (3,865 ft) – 240.29 m (788.4 ft) underground shaft,
weapons development		 1.5 kt
Tanya July 30, 1968 13:00:00.0 PST (–8 hrs)
 NTS Area U2dt 37°07′59″N 116°04′59″W / 37.13317°N 116.08312°W / 37.13317; -116.08312 (Tanya) 1,271 m (4,170 ft) – 381 m (1,250 ft) underground shaft,
weapons development		 20 kt Venting detected, 140 Ci (5,200 GBq)
Imp August 9, 1968 13:00:00.0 PST (–8 hrs)
 NTS Area U2bj 37°09′42″N 116°04′41″W / 37.16176°N 116.07808°W / 37.16176; -116.07808 (Imp) 1,314 m (4,311 ft) – 178.46 m (585.5 ft) underground shaft,
weapons development		 350 t Venting detected on site, 4.2 kCi (160 TBq)
Rack August 15, 1968 17:00:00.0 PST (–8 hrs)
 NTS Area U9ap 37°07′25″N 116°02′57″W / 37.12373°N 116.0491°W / 37.12373; -116.0491 (Rack) 1,254 m (4,114 ft) – 199.72 m (655.2 ft) underground shaft,
weapons development		 1 kt Venting detected, 10 Ci (370 GBq)
Diana Moon August 27, 1968 16:30:00.04 PST (–8 hrs)
 NTS Area U11e 36°52′38″N 115°55′55″W / 36.87718°N 115.93195°W / 36.87718; -115.93195 (Diana Moon) 1,004 m (3,294 ft) – 242.01 m (794.0 ft) underground shaft,
weapon effect		 9 kt Venting detected on site, 12 kCi (440 TBq)
Sled August 29, 1968 22:45:00.04 PST (–8 hrs)
 NTS Area U19j 37°15′01″N 116°20′52″W / 37.25028°N 116.34777°W / 37.25028; -116.34777 (Sled) 2,057 m (6,749 ft) – 728.88 m (2,391.3 ft) underground shaft,
weapons development		 200 kt
Noggin September 6, 1968 14:00:00.13 PST (–8 hrs)
 NTS Area U9bx 37°08′09″N 116°02′54″W / 37.13597°N 116.04824°W / 37.13597; -116.04824 (Noggin) 1,259 m (4,131 ft) – 581.99 m (1,909.4 ft) underground shaft,
weapons development		 120 kt Venting detected, 16 Ci (590 GBq)
Knife-A September 12, 1968 14:00:00.04 PST (–8 hrs)
 NTS Area U3fb 37°01′54″N 116°00′45″W / 37.03178°N 116.01237°W / 37.03178; -116.01237 (Knife-A) 1,190 m (3,900 ft) – 331.8 m (1,089 ft) underground shaft,
weapons development		 20 kt
Stoddard September 17, 1968 14:00:00.04 PST (–8 hrs)
 NTS Area U2cms 37°07′11″N 116°07′42″W / 37.11981°N 116.12835°W / 37.11981; -116.12835 (Stoddard) 1,370 m (4,490 ft) – 467.87 m (1,535.0 ft) underground shaft,
peaceful research		 31 kt Venting detected, 16 Ci (590 GBq) Project Plowshare – clean excavation device development.
Hudson Seal September 24, 1968 17:05:01.09 PST (–8 hrs)
 NTS Area U12n.04 37°12′17″N 116°12′26″W / 37.20473°N 116.20727°W / 37.20473; -116.20727 (Hudson Seal) 2,168 m (7,113 ft) – 344.42 m (1,130.0 ft) tunnel,
weapon effect		 20 kt
Welder October 3, 1968 14:00:00.04 PST (–8 hrs)
 NTS Area U3fs 37°02′48″N 116°01′50″W / 37.04665°N 116.03048°W / 37.04665; -116.03048 (Welder) 1,199 m (3,934 ft) – 117.66 m (386.0 ft) underground shaft,
safety experiment		 less than 20 kt
Knife-C October 3, 1968 14:29:00.04 PST (–8 hrs)
 NTS Area U3er 37°01′33″N 115°59′38″W / 37.02591°N 115.99396°W / 37.02591; -115.99396 (Knife-C) 1,201 m (3,940 ft) – 301.44 m (989.0 ft) underground shaft,
weapons development		 3 kt
Vat October 10, 1968 14:30:00.04 PST (–8 hrs)
 NTS Area U9cf 37°08′00″N 116°02′35″W / 37.13327°N 116.04318°W / 37.13327; -116.04318 (Vat) 1,256 m (4,121 ft) – 194.92 m (639.5 ft) underground shaft,
weapons development		 1 kt
Hula October 29, 1968 15:36:00.09 PST (–8 hrs)
 NTS Area U9bu 37°06′48″N 116°02′30″W / 37.11321°N 116.0418°W / 37.11321; -116.0418 (Hula) 1,254 m (4,114 ft) – 198.46 m (651.1 ft) underground shaft,
weapons development		 250 t Venting detected on site, 7 Ci (260 GBq)
Bit - 1 October 31, 1968 18:30:00.04 PST (–8 hrs)
 NTS Area U3gt 37°02′49″N 116°01′49″W / 37.04701°N 116.03021°W / 37.04701; -116.03021 (Bit - 1) 1,199 m (3,934 ft) – 148.31 m (486.6 ft) underground shaft,
safety experiment		 1 kt simultaneous, separate holes.
Bit - 2 October 31, 1968 18:30:00.04 PST (–8 hrs)
 NTS Area U3gt 37°02′49″N 116°01′49″W / 37.04699°N 116.03034°W / 37.04699; -116.03034 (Bit - 2) 1,199 m (3,934 ft) + underground shaft,
safety experiment		 less than 20 kt simultaneous, separate holes.
File October 31, 1968 18:30:00.04 PST (–8 hrs)
 NTS Area U3gb 37°01′01″N 116°02′11″W / 37.01708°N 116.03649°W / 37.01708; -116.03649 (File) 1,185 m (3,888 ft) – 228.95 m (751.1 ft) underground shaft,
weapons development		 7 kt
Crew - 1 November 4, 1968 15:15:00.09 PST (–8 hrs)
 NTS Area U2db 37°07′50″N 116°05′15″W / 37.13043°N 116.08738°W / 37.13043; -116.08738 (Crew - 1) 1,287 m (4,222 ft) – 603.5 m (1,980 ft) underground shaft,
weapons development		 22 kt Simultaneous, same hole.
Crew - 2 November 4, 1968 15:16:00.09 PST (–8 hrs)
 NTS Area U2db 37°07′50″N 116°05′15″W / 37.13042°N 116.08738°W / 37.13042; -116.08738 (Crew - 2) 1,287 m (4,222 ft) + underground shaft,
weapons development		 less than 20 kt Simultaneous, same hole.
Crew - 3 November 4, 1968 15:16:00.09 PST (–8 hrs)
 NTS Area U2db 37°07′50″N 116°05′15″W / 37.13042°N 116.08738°W / 37.13042; -116.08738 (Crew - 3) 1,287 m (4,222 ft) + underground shaft,
weapons development		 less than 20 kt Simultaneous, same hole.
Auger November 15, 1968 15:30:00.04 PST (–8 hrs)
 NTS Area U3fx 37°02′52″N 116°00′02″W / 37.04765°N 116.00058°W / 37.04765; -116.00058 (Auger) 1,222 m (4,009 ft) – 240.62 m (789.4 ft) underground shaft,
weapons development		 1 kt
Knife-B November 15, 1968 15:45:00.04 PST (–8 hrs)
 NTS Area U3dz 37°01′34″N 116°02′03″W / 37.02609°N 116.03412°W / 37.02609; -116.03412 (Knife-B) 1,188 m (3,898 ft) – 362.94 m (1,190.7 ft) underground shaft,
weapons development		 8 kt
Ming Vase November 20, 1968 18:00:00.03 PST (–8 hrs)
 NTS Area U16a.04 37°00′35″N 116°12′26″W / 37.00973°N 116.2072°W / 37.00973; -116.2072 (Ming Vase) 1,931 m (6,335 ft) – 307.94 m (1,010.3 ft) tunnel,
weapon effect		 16 kt
Tinderbox November 22, 1968 16:19:00.04 PST (–8 hrs)
 NTS Area U9az 37°08′24″N 116°02′35″W / 37.13987°N 116.04312°W / 37.13987; -116.04312 (Tinderbox) 1,261 m (4,137 ft) – 439.52 m (1,442.0 ft) underground shaft,
weapons development		 3 kt Venting detected, 2 Ci (74 GBq)
Schooner December 8, 1968 16:00:00.14 PST (–8 hrs)
 NTS Area U20u 37°20′36″N 116°34′00″W / 37.34326°N 116.56661°W / 37.34326; -116.56661 (Schooner) 1,668 m (5,472 ft) – 111.22 m (364.9 ft) cratering,
peaceful research		 30 kt Venting detected off site, 3.7 MCi (140 PBq) Plowshare – excavation experiment in hard, dry rock.
Bay Leaf December 12, 1968 15:00:00.04 PST (–8 hrs)
 NTS Area U3gq 37°02′49″N 116°01′52″W / 37.04702°N 116.03104°W / 37.04702; -116.03104 (Bay Leaf) 1,199 m (3,934 ft) – 130.16 m (427.0 ft) underground shaft,
safety experiment		 less than 20 kt simultaneous, separate holes.
Tyg - 1 December 12, 1968 15:10:00.08 PST (–8 hrs)
 NTS Area U2dc1e 37°07′15″N 116°04′53″W / 37.1209°N 116.08145°W / 37.1209; -116.08145 (Tyg - 1) 1,273 m (4,177 ft) – 228.3 m (749 ft) underground shaft,
weapons development		 20 kt Venting detected on site, 6.8 kCi (250 TBq)
Tyg - 2 December 12, 1968 15:10:00.08 PST (–8 hrs)
 NTS Area U2dc2d 37°07′03″N 116°04′49″W / 37.11758°N 116.08035°W / 37.11758; -116.08035 (Tyg - 2) 1,270 m (4,170 ft) – 251 m (823 ft) underground shaft,
weapons development		 3 kt Venting detected on site
Tyg - 3 December 12, 1968 15:10:00.08 PST (–8 hrs)
 NTS Area U2dc3c 37°07′05″N 116°04′40″W / 37.11804°N 116.07788°W / 37.11804; -116.07788 (Tyg - 3) 1,268 m (4,160 ft) – 228.3 m (749 ft) underground shaft,
weapons development		 2 kt Venting detected on site
Tyg - 4 December 12, 1968 15:10:00.08 PST (–8 hrs)
 NTS Area U2dc4a 37°07′16″N 116°04′45″W / 37.12124°N 116.0791°W / 37.12124; -116.0791 (Tyg - 4) 1,272 m (4,173 ft) + underground shaft,
weapons development		 1 kt Venting detected on site
Tyg - 5 December 12, 1968 15:10:00.08 PST (–8 hrs)
 NTS Area U2dc5b 37°07′11″N 116°04′39″W / 37.11985°N 116.07744°W / 37.11985; -116.07744 (Tyg - 5) 1,270 m (4,170 ft) + underground shaft,
weapons development		 3 kt Venting detected on site
Tyg - 6 December 12, 1968 15:10:00.08 PST (–8 hrs)
 NTS Area U2dc6f 37°07′08″N 116°04′58″W / 37.11879°N 116.08278°W / 37.11879; -116.08278 (Tyg - 6) 1,273 m (4,177 ft) + underground shaft,
weapons development		 4 kt Venting detected on site
Scissors December 12, 1968 15:20:00.04 PST (–8 hrs)
 NTS Area U3gh 37°00′14″N 116°02′24″W / 37.00391°N 116.04°W / 37.00391; -116.04 (Scissors) 1,181 m (3,875 ft) – 240.58 m (789.3 ft) underground shaft,
weapons development		 1 kt Venting detected on site
Benham December 19, 1968 16:30:00.04 PST (–8 hrs)
 NTS Area U20c - 37°13′53″N 116°28′28″W / 37.23142°N 116.47448°W / 37.23142; -116.47448 (Benham) 1,887 m (6,191 ft) – 1,402.08 m (4,600.0 ft) underground shaft,
weapons development		 1.2 Mt
Packard January 15, 1969 19:00:00.07 PST (–8 hrs)
 NTS Area U2u 37°08′52″N 116°04′00″W / 37.14787°N 116.06654°W / 37.14787; -116.06654 (Packard) 1,288 m (4,226 ft) – 246.89 m (810.0 ft) underground shaft,
weapon effect		 10 kt Venting detected on site, 7 Ci (260 GBq)
Wineskin January 15, 1969 19:30:00.04 PST (–8 hrs)
 NTS Area U12r 37°12′33″N 116°13′35″W / 37.20909°N 116.22627°W / 37.20909; -116.22627 (Wineskin) 2,263 m (7,425 ft) – 518.16 m (1,700.0 ft) underground shaft,
weapons development		 40 kt
Shave January 22, 1969 15:00:00.04 PST (–8 hrs)
 NTS Area U3gk 37°00′56″N 115°59′43″W / 37.01544°N 115.99516°W / 37.01544; -115.99516 (Shave) 1,191 m (3,907 ft) – 240.75 m (789.9 ft) underground shaft,
weapons development		 2 kt
Vise January 30, 1969 15:00:00.038 PST (–8 hrs)
 NTS Area U3ej 37°03′12″N 116°01′48″W / 37.0533°N 116.02998°W / 37.0533; -116.02998 (Vise) 1,204 m (3,950 ft) – 454.06 m (1,489.7 ft) underground shaft,
weapons development		 20 kt
Biggin January 30, 1969 15:17:00.12 PST (–8 hrs)
 NTS Area U9bz 37°08′00″N 116°02′28″W / 37.13326°N 116.04113°W / 37.13326; -116.04113 (Biggin) 1,257 m (4,124 ft) – 242.32 m (795.0 ft) underground shaft,
weapons development		 less than 20 kt
Nipper February 4, 1969 15:00:00.04 PST (–8 hrs)
 NTS Area U3gl 37°00′09″N 116°00′36″W / 37.00262°N 116.01°W / 37.00262; -116.01 (Nipper) 1,178 m (3,865 ft) – 240.73 m (789.8 ft) underground shaft,
weapons development		 less than 20 kt
Winch February 4, 1969 15:00:00.04 PST (–8 hrs)
 NTS Area U3gf 37°00′34″N 116°02′35″W / 37.00941°N 116.04304°W / 37.00941; -116.04304 (Winch) 1,185 m (3,888 ft) – 240.63 m (789.5 ft) underground shaft,
weapons development		 600 t
Cypress February 12, 1969 16:18:20.88 PST (–8 hrs)
 NTS Area U12g.09 37°10′08″N 116°12′42″W / 37.16901°N 116.2116°W / 37.16901; -116.2116 (Cypress) 2,265 m (7,431 ft) – 359.66 m (1,180.0 ft) tunnel,
weapon effect		 15 kt
Valise March 18, 1969 14:30:00.12 PST (–8 hrs)
 NTS Area U9by 37°08′21″N 116°02′30″W / 37.13909°N 116.04171°W / 37.13909; -116.04171 (Valise) 1,261 m (4,137 ft) – 90.25 m (296.1 ft) underground shaft,
safety experiment		 less than 20 kt Venting detected
Chatty March 18, 1969 14:40:00.43 PST (–8 hrs)
 NTS Area U2bn 37°09′44″N 116°04′36″W / 37.16224°N 116.07679°W / 37.16224; -116.07679 (Chatty) 1,312 m (4,304 ft) – 194.77 m (639.0 ft) underground shaft,
weapons development		 800 t Venting detected, 0.7 Ci (26 GBq)
Barsac March 20, 1969 18:12:00.04 PST (–8 hrs)
 NTS Area U3gc 37°01′19″N 116°01′52″W / 37.02203°N 116.03098°W / 37.02203; -116.03098 (Barsac) 1,187 m (3,894 ft) – 304.13 m (997.8 ft) underground shaft,
weapons development		 10 kt Venting detected on site, 43 Ci (1,600 GBq)
Coffer March 21, 1969 14:30:00.41 PST (–8 hrs)
 NTS Area U2de 37°08′00″N 116°05′15″W / 37.13325°N 116.0876°W / 37.13325; -116.0876 (Coffer) 1,291 m (4,236 ft) – 464.82 m (1,525.0 ft) underground shaft,
weapons development		 26 kt Venting detected, 10 Ci (370 GBq)
Gourd-Amber - 1 April 24, 1969 13:04:00.14 PST (–8 hrs)
 NTS Area U2bf 37°09′50″N 116°04′50″W / 37.16393°N 116.08061°W / 37.16393; -116.08061 (Gourd-Amber - 1) 1,320 m (4,330 ft) – 181.3 m (595 ft) underground shaft,
weapons development		 800 t simultaneous, separate holes.
Gourd-Brown - 2 April 24, 1969 13:04:00.14 PST (–8 hrs)
 NTS Area U2bl 37°09′36″N 116°04′55″W / 37.15998°N 116.08186°W / 37.15998; -116.08186 (Gourd-Brown - 2) 1,317 m (4,321 ft) + underground shaft,
weapons development		 less than 20 kt simultaneous, separate holes.
Blenton April 30, 1969 17:00:00.04 PST (–8 hrs)
 NTS Area U7p 37°04′53″N 116°00′53″W / 37.08145°N 116.01481°W / 37.08145; -116.01481 (Blenton) 1,255 m (4,117 ft) – 557.73 m (1,829.8 ft) underground shaft,
weapons development		 51 kt Venting detected on site
Thistle April 30, 1969 17:00:00.04 PST (–8 hrs)
 NTS Area U7t 37°05′25″N 116°00′23″W / 37.09023°N 116.00651°W / 37.09023; -116.00651 (Thistle) 1,281 m (4,203 ft) – 560.47 m (1,838.8 ft) underground shaft,
weapons development		 38 kt
Purse May 7, 1969 13:45:00.04 PST (–8 hrs)
 NTS Area U20v 37°16′58″N 116°30′06″W / 37.28283°N 116.50153°W / 37.28283; -116.50153 (Purse) 1,828 m (5,997 ft) – 598.75 m (1,964.4 ft) underground shaft,
weapons development		 90 kt
Aliment May 15, 1969 18:00:00.04 PST (–8 hrs)
 NTS Area U2gj 37°00′43″N 115°59′09″W / 37.01185°N 115.98583°W / 37.01185; -115.98583 (Aliment) 1,207 m (3,960 ft) – 240.51 m (789.1 ft) underground shaft,
weapons development		 2 kt
Ipecac - 1 May 27, 1969 14:00:00.04 PST (–8 hrs)
 NTS Area U3hka 37°00′54″N 116°00′11″W / 37.01498°N 116.00292°W / 37.01498; -116.00292 (Ipecac - 1) 1,181 m (3,875 ft) – 124.18 m (407.4 ft) underground shaft,
safety experiment		 less than 20 kt Venting detected on site simultaneous, separate holes.
Ipecac - 2 May 27, 1969 14:00:00.04 PST (–8 hrs)
 NTS Area U3hkb 37°00′53″N 116°00′03″W / 37.01482°N 116.00086°W / 37.01482; -116.00086 (Ipecac - 2) 1,182 m (3,878 ft) + underground shaft,
safety experiment		 less than 20 kt Venting detected on site simultaneous, separate holes.
Torrido May 27, 1969 14:15:00.04 PST (–8 hrs)
 NTS Area U7w 37°04′30″N 115°59′46″W / 37.07506°N 115.99617°W / 37.07506; -115.99617 (Torrido) 1,270 m (4,170 ft) – 514.72 m (1,688.7 ft) underground shaft,
weapons development		 22 kt
Tapper June 12, 1969 14:00:00.04 PST (–8 hrs)
 NTS Area U3go 37°00′32″N 116°01′52″W / 37.00879°N 116.03109°W / 37.00879; -116.03109 (Tapper) 1,181 m (3,875 ft) – 303 m (994 ft) underground shaft,
weapons development		 10 kt Venting detected on site
Bowl - 1 June 26, 1969 16:00:00.13 PST (–8 hrs)
 NTS Area U2bo1 37°09′45″N 116°04′46″W / 37.16244°N 116.07949°W / 37.16244; -116.07949 (Bowl - 1) 1,316 m (4,318 ft) – 198.12 m (650.0 ft) underground shaft,
weapons development		 2 kt simultaneous, separate holes.
Bowl - 2 June 26, 1969 16:00:00.13 PST (–8 hrs)
 NTS Area U2bo2 37°09′39″N 116°04′48″W / 37.16072°N 116.0801°W / 37.16072; -116.0801 (Bowl - 2) 1,315 m (4,314 ft) + underground shaft,
weapons development		 3 kt simultaneous, separate holes.
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