CLIMATIC AND SOIL DATA ON ORENBURG (51 49'N-55 06'E)

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79T01019A000400030001-3
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 7
• Document Creation Date: December 9, 2016
• Document Release Date: March 26, 2001
• Sequence Number: 1
• Publication Date: September 1, 1965
• Content Type: REPORT

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CIA/BI GB 66-11
September 1965
CLIMATIC AND SOIL DATA ON ORENBURG
510 9'N-55Oo 'E
Orenburg is located on the chernozem steppes west of the southern
Urals. Its climate is characterized by long cold winters, short warm
summers, low precipitation, and moderate snow cover. Its temperature
regime is somewhat similar to that of the area between eastern Montana
and central Minnesota, but Orenburg has considerably drier summers.
The average monthly surface air temperatures (see Table 1) range from
5.O?F in the coldest month (January) to 71.6?F in the warmest month (July),
and extreme temperatures of -43.6OF and 102.2?F have been recorded. The
average daily temperature is below freezing from early November to early
April, and it is above 590F from mid-May to early September.
The annual precipitation (see Table 2) averages 15.2 inches, about
4+6 percent occurring during the five warmest months, May through September.
The maximum monthly precipitation normally occurs in June, with an average
of 1.8 inches, and the minimum in March and April, each with an average of
0.8 inch. The predominant forms of precipitation are heavy showers and
thunderstorms in summer and snow in winter. Snowfall can be expected
from early October through April. A snow cover begins to form in early
November and usually reaches its maximum depth -- about 20.5 inches as a
long-term average -- in early March. Thawing begins in late March, and
by mid-April the snow cover has disappeared.
GROUP 1
Excluded from automatic
downgrading and
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Temperature a/
(in degrees Fahrenheit)
Average
Average Difference
Between
Daily Extremes
Maximum Difference
Between
Daily Extremes
January
5.0
14.6
24.7
February
6.3
18.4
34.6
March
18.1
20.3
30.8
April
39.7
25.4
38.9
May
58.5
28.3
37.6
June
67.5
28.8
39.1
July
71.6
27.2
40.9
August
67.6
29.7
45.7
September
55.6
29.7
38.2
October
40.5
26.6
40.9
November
24.6
18.4
27.9
December
10.8
13.5
26.8
38.8
Absolute minimum: -43.6
Absolute maximum: 102.2
Average daily temperature exceeds:
32 -- 6 April to 1 November
41 -- 18 April to 15 October
50 -- 30 April to 27 September
59 -- 16 May to 8 September
Average daily temperature below:
23 -- 20 November to 21 March
14 -- 13 December to 3 March
5 -- 4 January to 12 February
Normal frost-free period: 4 May to 29 September
a. Length of record unknown.
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Precipitation a/
(in inches)
Average
Average
January
1.4
July
1.5
February
0.9
August
1.3
March
0.8
September
1.0
April
0.8
October
1.2
May
1.4
November
1.6
June
1.8
December
1.5
Annual 15.2
Average number of days a year with snow cover: 146
Average date of first snow cover: 3 November
Average date of last snow cover: 10 April
Average maximum depth of snow cover (based on 10-day
period of greatest depth): 20.5 inches
Period with depth of snow generally 4 inches or more:
12 December to 8 April
a. Length of record unknown.
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II. Soils
The urbanized area of Orenburg is located on undulating terrain that
gradually rises to almost 150 feet above the Ural River. Aircraft Plant
4+7 is in the northeastern part of Orenburg, 3.2 miles north of the Ural
River. The plant is situated on relatively flat land about 100 feet
above the river level.
The upper layer of sediments in the Orenburg area generally consists
of silty sand and sandy loam to a depth of 10 feet. This upper layer is
underlain by sand and gravelly sand with a total thickness of 20 to 30
feet. Unconsolidated clay is encountered at depths ranging from 30 to
40 feet.
For installations having foundations less than 10 feet deep, condi-
tions below the level of frost penetration (absolute maximum of 6 feet)
range from fair to good depending on the degree of compaction for the
characteristic silty sand and sandy loam soils in the area of the aircraft
plant. For installations requiring deeper excavations, conditions range
from fair to good and generally would not present difficult stabilization
problems. The relatively flat terrain in the vicinity of the plant would
provide few grading and leveling problems. Drainage problems would be
few as the water table varies from 20 feet below the surface in late
spring to as much as 50 feet below the surface in summer and fall.
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DATES: 5 Janua" 5
TO: Ch/G
THROUGH; MAO
FROM: Ch/GG/5
SUBJ1T s Research Activity Notice
Subject of
CS atic and Soil Cats
i at sites of 20 Soviet aircraft planta3
k Novosibirsk, Oor'kiy,, Xomsoao1'*k,
(2), bar'ko4, SieY, Moscow, Moecow/!-ili
-tl+ds, S+wae a, TsgaMrog, Leningrad (2).
ulstero NwatrudtIon Bmnah, n i%a 1A
st ^
Coordination
with or Aid ,
from Other
Applicable
ro ec~`1~o
i aix 8
Claasfy as
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cliastic and sell data on conditions affecting