PROJECT BLUE BOOK

Incident #76
UNCLASSIFIEL
ATTC NO. DATE OF INFO 13 Auc.47
AF NO. LOGATION Salmon Dam, Idaho
REPORT NO. SOURCE Male Civilian
DATE OF PORT DATE OF EPORT DATF IN TO ATIC
THE OF BEFEING THE OF SEOTING N/S COLOR reflected light
Entinited
SHAPE Circular SPRED great speed SPEED great speed Measauure Measaure
Esti..t.
SIZE N/S N/S ALTITUDE 4,000'-6000 ALTITUDE_4,000-6000 4asured 4 asures
COURSH COURSE N/S LENGTH OF THH OBSERVED
NO. IN GRO'UP 2 TYPE-OF OBSERVATION Ground
LOURD Echo of Motor Fabo of Kotor MANUVEOS MANEUVERS
PHOTOS SKETCHES
Temporary ATIC Form 329 UNCLASSIFIED
(2 Jan 52)

With l9h ineidents thus eliminated, fhere remain thirty-four
which contain sone evidence but have no apparent ready explanation.
This staterient is true only under the assuption that the ovidenee is
accepted as reliable and accurate. When paychological and physic-
lorieal factors are taken into ccnsideration, all of these inheident
can be explained rationally, as pointed out by Rand Corporation an
Fitts of Air Faterlel Command Aoro-MHedlcal Laboratciy (coe
10).
Air Matoriel Cons nd Acro- Madior Laborabory (or
212 Incidonto considored)
Thererare aufficiont paychological'explarations for the sese.
unidentiriod flying objoets to provice plausible explarations
ports not othorwise explainable. Phees errors in identifying
stimuli result chiefly from inability to estimate speed, distanes, en
sizo.
All of the remaining 3h incidents are treated in detail in chi
report. Thece ineidents form no pattern in regard to area of site
type of objoct, or manner of perrormanco. Thore are indication,
avor, that somo sightinge vere influoncod by ourlier reports,
probably puid not have been consideret, wrumnl or roporto probably suid not have been considoret, wueal or reporto
boen no puelseaty. boen no pualseaty.
Project Crucgo Projoot Crucgo
Surrmery of Lho Ehaluntion gf Raraining Eeports Surieery of Iho Ehaluntion gf Raraining Reports
VII. Ser y of ArC Evaluation of Peraining Reports VII.Sm of ArC Emluation of Peraining Reports
The remaining unexplained ineidents (seo Appendix "I") exhikin:
r comon charneteristics. Two of them, by statements of the repertere
suld not have been made had the witnosses not read of the ?'t. Pehizr
sident (Incikknt No. l7). l'oss wore distributed without pattem
throughhout the Wnited States. A few were outside the !. S. No twe
deseriptions of appearance or perforrwnce were exactly alike. There-
ported sightings cccurred at varlous times or day and year.
In the following section of this report, each renaining unexplai
intident is comsidered separately. It is not the intent to gonerally deretie
character of observers, but each case has undesirable elepents, asese
Ennot be disrogarded. The numerical dosignation is nerely te casegerie
for of the ineident in the projeot files.
1, 30, 37, 21, 29, 35, 37, 40, 51, 58, 62, 54, 68, 72, 75( 76, 77, 79, 32,
111, 122, 134, 135, 151, 152, 154, 152, 168, 176, 133, 186, 193, 207, 215, 236,

Incidant No. 76 -- 13 Au-ust 1947, Salmon Dam, Idaho.
Two men reported simultaneously hearing a roar, and looking up observed
two objects of undertormined size, several miles distant at a great
hoight which they thought might have been 4000-6000 feet. The objects
were "cireular", "reflected light", and were traveling at "great speed?
Although occurring on the same day as Incident No. 75, the descriptions
vary widely.
AMC Opinion: There is no information contained in this report to
refute the assumption that these men saw two ordinary aircraft at too
great a distance to discern details.
1
14

UNCLASSIFIED
Incident 76 -- Salmon Dam, Idano -- 13 ugust 1947
There does not appear to be angthing astronomical about
this incident.
Although sighted on the same day as the sky-ulue canyon
saucer (incident 75), the objects described here seem to have
little or no similarity to the former.
C
D
1

Agent conld not locate but who
accompanied at the time stated that he and could hear a
roar. They looked up and saw 2 objects flying at great height which
might have been between 4,000 and 6,000 ft. He could give no estimate as to
size end said they could have been several miles away. He end
were satisfied that had seen something and were very doubtful if the objects
were planes.
From a newspaper account (Times News, Twin Falls, Idaho, Friday Aug 15, 1947)
said he had seen an umusual object in the air
the same day as experience (Incident 75) and that a sound resembling
the echo of a motor 'caused him to look unward end there he saw two circular
objects which reflected light. They were traveling at a great speed and at
higher altitude than most phanes.
143
111

FUNCLASSIFIED
CHECK-LIST - UNIDENTIFIED FLYING OBJECTS
1. Date 13 Aug 47
2.Time 3/s
3. Location Salmon Dam
4. Name of observer
5. Occupation of obsorver
N/S
6. Address of observor 3/s
7. Placo of observation Salmon Dam
8. Numbor of objocts 2
9. Distance of object from observer xdsxeoxst several miles away
10. Timo in sight t /s
11. Altitude 11. Altitude 4,000 to 6,000 ft 4.000 to 6,000 ft
12. Speed 12. Speod great speed
13. Diroction of flight 13。 Diroction of flight 3/s
1h. Tactics Tactics /s /s
15. Sourd 15. Sound echo of a motor -
16. Sizo roar - roar-
N/S n/S
17. 7 Color /s - reflected light
18. Shape circular
19.
20.
21. DOWNGRADED AT 12 YEAR
22, Woather conditions INTERVALS:NOT ATOMATICALLY
3/s DECLASSIFLED. DOD DIR 5200.18
23. Effect on clouds m/3
24.3 Sketches or photographs Mone
25. Manner of disappearance UNCLASS
21/3
25, Remarks: (over)

Dr HYNEK'S EVALUATIONS EXTRACTED FROM PROJECT GRUDGE REPORT.
INCILENT INDEX
1. Astronomical
a。 Eigh probability:
26，27，30，31，32，33，34，48，49，59，60，66，69，70，94,
95,96,97,98,101,102,103,104,116,119,132,136,140,
147,148,158,174,184,185, 187,197,203,204,208,216,
219,338.
b. Fair or low probability:
#19，20，23。24，28，35，35，46，50。63，67，80，82。93，1C0,
112,120,121,129,130,144,153,165,166,167,175,192,
199,202,205,220,230,240.
2. Non-astronomical tut suggestive of other explanations
a. Balloons or ordinary airoraft:
#3，11,22，41,42,53,54,73,81,83。91,92,113,114,115, #3，11,22，41,42,53,54,73,81,83，91,92,113,114,115,
126,131,138, 141, 145,155, 156, 157,159, 160,161,163, 126,131,138,141,145,155,156,157,159,160,161,163,
169,171,173,178,180,182,198,190,194,195,196,198,
200，201,209，210,217,222,235,237,239。 200，201，209,210,217，222,235,237,239。
b, Rookets, flares or falling bodies:
#4，5,6,7,8，9,12,13，14,15,16,25，56,65，78，106,107, #4，5,6,7，8，9,12，13，14,15，16，25，55，65，78，106。107,
108, 109, 133, 170,211, 218. 108,109,133,170,211,218.
0. Misoellaneous (reflections, auroral streamors, birds, eto.):
#39,89,123,124,128,146,164,181,189,214,221,231,234. #39,89,123,124,128,146,164,181,189,214,221,231,234.
S. Non-astronowioal, with no explanation evident
a. Lack of evidence precludea explanations
#38，44,45，47，55，57,72,86，87。88,90,99,110,117。118,
125, 127, 137, 139, 149, 150, 177, 179, 191, 206, 212, 213,
229,232，233.
b, Evidence offered muggests no explanation:
3，2,10，17，21，29，37,40，51。52，58，61,62，64，68，71，
76,76,77,79,84,105, 111,122,135,151,152,154, 162,
168,172,176, 183, 186, 193,207,215, 223, 224,225, 226,
227, 236, 241, 242,243,244, 134.