Operation Bedrock facts for kids
Quick facts for kids Operation Bedrock |
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|---|---|
| Information | |
| Country | United States |
| Period | 1974–1975 |
| Number of tests | 27 |
| Test type | underground shaft, tunnel |
| Max. yield | 750 kilotonnes of TNT (3,100 TJ) |
The United States's Bedrock nuclear test series was a group of 27 nuclear tests conducted in 1974–1975. These tests followed the Operation Arbor series and preceded the Operation Anvil series.
| Name | Date time (UT) | Local time zone | Location | Elevation + height | Delivery Purpose |
Device | Yield | Fallout | References | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| Escabosa | July 10, 1974 16:00:00.092 | PST (–8 hrs) |
NTS Area U7ac 37°04′30″N 116°01′58″W / 37.07498°N 116.03269°W | 1,223 m (4,012 ft) – 638.52 m (2,094.9 ft) | underground shaft, weapons development |
150 kt | I-131 venting detected, 0 | |||
| Crestlake-Briar - 1 | July 18, 1974 14:00:01.2 | PST (–8 hrs) |
NTS Area U2dw 37°07′09″N 116°05′10″W / 37.11928°N 116.08601°W | 1,274 m (4,180 ft) – 373.68 m (1,226.0 ft) | underground shaft, weapons development |
less than 20 kt | Venting detected | Simultaneous, same hole. | ||
| Crestlake-Tansan - 2 | July 18, 1974 14:00:01.2 | PST (–8 hrs) |
NTS Area U2dw 37°07′09″N 116°05′10″W / 37.11928°N 116.08601°W | 1,274 m (4,180 ft) – 272 m (892 ft) | underground shaft, weapons development |
2 kt | Venting detected, 19 Ci (700 GBq) | Simultaneous, same hole. | ||
| Puye | August 14, 1974 14:00:00.11 | PST (–8 hrs) |
NTS Area U3jl 37°01′24″N 116°02′14″W / 37.02342°N 116.03713°W | 1,188 m (3,898 ft) – 430.08 m (1,411.0 ft) | underground shaft, weapons development |
5 kt | I-131 venting detected, 0.000002 Ci (7.4×10−5 GBq) | |||
| Portmanteau | August 30, 1974 15:00:00.163 | PST (–8 hrs) |
NTS Area U2ax 37°09′09″N 116°05′04″W / 37.1524°N 116.08456°W | 1,313 m (4,308 ft) – 655.32 m (2,150.0 ft) | underground shaft, weapons development |
160 kt | ||||
| Pratt | September 25, 1974 14:00:00.08 | PST (–8 hrs) |
NTS Area U3hq 37°00′44″N 116°01′52″W / 37.01211°N 116.03103°W | 1,183 m (3,881 ft) – 313.96 m (1,030.1 ft) | underground shaft, weapons development |
5 kt | ||||
| Trumbull | September 26, 1974 14:30:00.164 | PST (–8 hrs) |
NTS Area U4aa 37°05′35″N 116°05′44″W / 37.09316°N 116.09563°W | 1,269 m (4,163 ft) – 262.74 m (862.0 ft) | underground shaft, weapons development |
200 t | ||||
| Stanyan | September 26, 1974 15:05:00.17 | PST (–8 hrs) |
NTS Area U2aw 37°07′57″N 116°04′09″W / 37.13258°N 116.06926°W | 1,275 m (4,183 ft) – 573.02 m (1,880.0 ft) | underground shaft, weapons development |
100 kt | ||||
| Estaca | October 17, 1974 17:13:00.118 | PST (–8 hrs) |
NTS Area U3ja 37°00′23″N 116°00′56″W / 37.00639°N 116.01559°W | 1,180 m (3,870 ft) – 321.05 m (1,053.3 ft) | underground shaft, weapons development |
less than 20 kt | ||||
| Hybla Fair | October 28, 1974 15:00:00.168 | PST (–8 hrs) |
NTS Area U12n.09 37°12′04″N 116°12′17″W / 37.20108°N 116.20482°W | 2,227 m (7,306 ft) – 404.47 m (1,327.0 ft) | tunnel, weapon effect |
less than 20 kt | Venting detected, 500 Ci (18,000 GBq) | Test of a new line-of-sight pipe configuration for tunnel testing, basic measurements of blast parameters. The configuration proved to be inadequate for effects testing of warheads. | ||
| Temescal | November 2, 1974 15:30:00.164 | PST (–8 hrs) |
NTS Area U4ab 37°05′35″N 116°05′33″W / 37.09314°N 116.09254°W | 1,263 m (4,144 ft) – 262.74 m (862.0 ft) | underground shaft, weapons development |
less than 20 kt | Venting detected, 2 Ci (74 GBq) | |||
| Puddle | November 26, 1974 15:00:00.9 | PST (–8 hrs) |
NTS Area U3kg 37°00′04″N 116°00′43″W / 37.00098°N 116.01207°W | 1,169 m (3,835 ft) – 183.97 m (603.6 ft) | underground shaft, safety experiment |
less than 20 kt | ||||
| Keel | December 16, 1974 17:30:00.088 | PST (–8 hrs) |
NTS Area U3hu 37°00′41″N 116°01′06″W / 37.01136°N 116.01833°W | 1,182 m (3,878 ft) – 304.72 m (999.7 ft) | underground shaft, weapons development |
4 kt | ||||
| Portola - 1 | February 6, 1975 15:30:00.165 | PST (–8 hrs) |
NTS Area U10bb 37°10′42″N 116°03′09″W / 37.17836°N 116.05243°W | 1,285 m (4,216 ft) – 198.12 m (650.0 ft) | underground shaft, weapons development |
350 t | Venting detected, 10 Ci (370 GBq) | Simultaneous, same hole. | ||
| Portola-Larkin - 2 | February 6, 1975 15:30:00.16 | PST (–8 hrs) |
NTS Area U10bb 37°10′42″N 116°03′09″W / 37.17836°N 116.05243°W | 1,285 m (4,216 ft) – 274 m (899 ft) | underground shaft, weapons development |
less than 20 kt | Venting detected | Simultaneous, same hole. | ||
| Teleme | February 6, 1975 16:13:00.17 | PST (–8 hrs) |
NTS Area U9cl 37°06′51″N 116°01′18″W / 37.11422°N 116.02166°W | 1,300 m (4,300 ft) – 304.8 m (1,000 ft) | underground shaft, weapons development |
6 kt | ||||
| Bilge | February 19, 1975 20:10:00.224 | PST (–8 hrs) |
NTS Area U3kc 37°00′08″N 116°01′31″W / 37.00219°N 116.02527°W | 1,179 m (3,868 ft) – 318.35 m (1,044.5 ft) | underground shaft, weapons development |
less than 20 kt | Venting detected | |||
| Topgallant | February 28, 1975 16:15:00.09 | PST (–8 hrs) |
NTS Area U4e 37°06′22″N 116°03′26″W / 37.10615°N 116.05712°W | 1,245 m (4,085 ft) – 713.37 m (2,340.5 ft) | underground shaft, weapons development |
160 kt | ||||
| Cabrillo | March 7, 1975 16:00:00.169 | PST (–8 hrs) |
NTS Area U2dr 37°08′02″N 116°05′07″W / 37.13402°N 116.0852°W | 1,288 m (4,226 ft) – 600.46 m (1,970.0 ft) | underground shaft, weapons development |
89 kt | Venting detected, 11 Ci (410 GBq) | |||
| Dining Car | April 5, 1975 19:45:00.187 | PST (–8 hrs) |
NTS Area U12e.18 37°11′16″N 116°12′53″W / 37.18787°N 116.21476°W | 2,238 m (7,343 ft) – 383.01 m (1,256.6 ft) | tunnel, weapon effect |
20 kt | ||||
| Edam | April 24, 1975 14:10:00.17 | PST (–8 hrs) |
NTS Area U2dy 37°06′56″N 116°05′17″W / 37.11569°N 116.08811°W | 1,272 m (4,173 ft) – 411.48 m (1,350.0 ft) | underground shaft, weapons development |
20 kt | ||||
| Obar | April 30, 1975 15:00:00.9 | PST (–8 hrs) |
NTS Area U7ag 37°06′32″N 116°01′47″W / 37.10881°N 116.02967°W | 1,279 m (4,196 ft) – 568.8 m (1,866 ft) | underground shaft, weapons development |
38 kt | ||||
| Tybo | May 14, 1975 14:00:00.16 | PST (–8 hrs) |
NTS Area U20y 37°13′15″N 116°28′31″W / 37.22071°N 116.47527°W | 1,880 m (6,170 ft) – 765.05 m (2,510.0 ft) | underground shaft, weapons development |
380 kt | ||||
| Stilton | June 3, 1975 14:20:00.17 | PST (–8 hrs) |
NTS Area U20p 37°20′24″N 116°31′26″W / 37.34°N 116.52377°W | 1,667 m (5,469 ft) – 731.52 m (2,400.0 ft) | underground shaft, weapons development |
200 kt | ||||
| Mizzen | June 3, 1975 14:40:00.106 | PST (–8 hrs) |
NTS Area U7ah 37°05′41″N 116°02′13″W / 37.09478°N 116.03697°W | 1,247 m (4,091 ft) – 637.18 m (2,090.5 ft) | underground shaft, weapons development |
140 kt | ||||
| Alviso | June 11, 1975 13:00:00.167 | PST (–8 hrs) |
NTS Area U2du 37°06′42″N 116°04′28″W / 37.11173°N 116.07457°W | 1,261 m (4,137 ft) – 183 m (600 ft) | underground shaft, safety experiment |
less than 20 kt | ||||
| Futtock | June 18, 1975 11:49:00.092 | PST (–8 hrs) |
NTS Area U3eh 37°03′56″N 116°01′22″W / 37.06562°N 116.02271°W | 1,221 m (4,006 ft) – 186.56 m (612.1 ft) | underground shaft, safety experiment |
less than 20 kt | ||||
| Mast | June 19, 1975 13:00:00.09 | PST (–8 hrs) |
NTS Area U19u 37°21′01″N 116°19′16″W / 37.35029°N 116.3211°W | 2,068 m (6,785 ft) – 910.7 m (2,988 ft) | underground shaft, weapons development |
520 kt | ||||
| Camembert | June 26, 1975 12:30:00.161 | PST (–8 hrs) |
NTS Area U19q 37°16′44″N 116°22′10″W / 37.27887°N 116.36947°W | 2,033 m (6,670 ft) – 1,310.64 m (4,300.0 ft) | underground shaft, weapons development |
750 kt |
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Operation Bedrock Facts for Kids. Kiddle Encyclopedia.