RAILROAD BRIDGE OVER THE IRKUT RIVER NEAR IRKUTSK

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00810A003900790010-2
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 3
• Document Creation Date: December 22, 2016
• Document Release Date: January 25, 2010
• Sequence Number: 10
• Publication Date: July 2, 1954
• Content Type: REPORT

Sanitized Copy Approved for Release 2010/01/25: CIA-RDP80-0081OA003900790010-2
CENTRAL
t4TELLIGENCE AGENCY
INFORMATION REPORT
CONFIDENTIAL/CONTROL - US OFFICIALS ONLY
PLACE ACQUIRED
This Document contains information affecting the Na-
tional Defense of the United States, within the mean-
ing of Title 18, Sections 793 and 794, of the U.S. Code, as
amended. Its transmission or revelation of its contents
to or receipt by an unauthorized person Is prohibited
by law. The reproduction of this form Is prohibited.
REPORT
DATE DISTR.
2 July 1954
NO. OF PAGES 3
REQUIREMENT NO. RD
REFERENCES
USSR (RSFSR)
Railroad Bridge over the Irkut River
near Irkutsk
This is UNEVALUATED
Information
THE SOURCE EVALUATIONS IN THIS REPORT ARE DEFINITIVE.
THE APPRAISAL OF CONTENT IS TENTATIVE.
(FOR KEY SEE REVERSE)
Location
1. The double-track railroad bridge over the Irkut River lies about one to one-
and one-half kilometers from the confluence of the Irkut with the Angara.River.
The large road bridge over the Angara near Irkutsk is a good landmark; this
bridge lies about two to three kilometers east-southeast of the railroad
bridge.l The Trans-Siberian Railroad line runs over the bridge
Technical Details (See sketch on page 3)
2.. The following details are givens
a. Length of the bridge: about 150 meters.
b. Width of the bridge: sufficient for two Russian-gauge tracks.
c. Number of arches: three.
d. Construction of the arches: iron construction with oval-shaped upper girder.
e. Construction and number of piers: two granite piers and two granite
abutments.
f. The track: two Russian-gauge tracks with heavy rails, mounted on
wooden sleepers. made of larch wood. At one side of the bridge is a
footpath for the railroad personnel and the guard.
g. Width of the river: at low-water level, in May and June, the river is
150 meters wide near the bridge and 200-250 mete wide below and above
the bridge.
h. Depth of the river: at low-water level,three to four meters, at high-
water le , five to sic meters "1
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Sanitized Copy Approved for Release 2010/01/25: CIA-RDP80-0081OA003900790010-2
 Sanitized Copy Approved for Release 2010/01/25: CIA-RDP80-0081OA003900790010-2
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i. Reckoned from the upper edge of the rails the water levels are:
at low-water. level about ten meters beluw the bridge.,at high-water
level about eight meters below the bridge.
J. Angle of the embankment on both banks: near the bridge about 300, above
and below the bridge about 150.
k. Condition of the river bed: the river bed consists of firm rock,on top
of which are rocks and rubble.,
1. Approaches to the bridge: the railroad line runs on an embankment about
four to five meters high on both sides of the bridge: the slopes near the
bridge are paved. The wooden sleepers are bedded in stone chips.
in. Guards: the bridge is permanently guarded by two sentries armed with
machine carbines, one at each end of the bridge. During the night,the
piers and abutments are lit up. The approach to the abutments is closed
by barbed wire. The guards belong to the infantry units stationed in
Irkutsk. The nearest militia station is in the building of the Irkutsk
passenger station.
n. Equipment for destroying the bridge: it is believed that there are de-
tonation chambers in the two middle piers.
o. Traffic on the bridge: the entire traffic of the Trans-_%berian Railroad
line runs over the bridge. The majority of the freight trains have four-
axle pullman freight cars with a maximum load capacity of 60 tons. Mtn trains are
crossing the bridge, the speed is only slightly decreasgd.
p. Traffic on the river: the Irkut River is not navigable and can only be
used by fishing boats and by rafts during the high-water period of May-
June.
Co n : The bridge is both a road and railroad bridge.
CONFIDENTIAL/CONTROL - US OFFICIALS ONLY
Sanitized Copy Approved for Release 2010/01/25: CIA-RDP80-0081OA003900790010-2
 Sanitized Copy Approved for Release 2010/01/25: CIA-RDP80-0081OA003900790010-2
rwro N
Sanitized Copy Approved for Release 2010/01/25: CIA-RDP80-0081OA003900790010-2