1. HYDROELECTRIC PLANTS 2. THERMOELECTRIC PLANTS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00810A000500340003-6
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 57
• Document Creation Date: December 22, 2016
• Document Release Date: October 30, 2009
• Sequence Number: 3
• Publication Date: June 12, 1953
• Content Type: REPORT

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CENTRAL INTELLIGENCE AGENCY
INFORMATION REPORT
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.
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SECURITY INFORMATION
h,.L garia
10 Hydroelectric Plants
I. The rmeiactrio Plants
THE SOURCE EVALUATIONS IN THIS REPORT ARE DEFINITIVE.
THE APPRAISAL OF CONTENT IS TENTATIVE.
(FOR KEY SEE REVERSE)
1.. The lay gay rats?mb eeiw of power plants under construction a?e the primar facto:' for the
vast pCW?;0 pI?o9--mam of Bulgaria's mechanical,. chemicals eedl tai the industries and
fur the e .F ct if icr~ti Ira of the country-Is rail network.
For a naap shoa ;ing the locations of power plants in Bulgarl.t, see Appe .dix As pages
50, 51, tip, l 5D.
HYDROELECTRIC PLANTS
Plants Under Construction
The hy u..`~-oe_1, e (1a.-'ic ce-,xt,1 &,.. at D
(N i1415, E 24-24), Auti n 195b:
a. Contiatructy.on work was begu rr, in April 1950 and is scheduled for completion in
).953.
D. Th o sd?`~?aib is to have throe plants axrk-. a its.:, in ?t,, of 10,000 kilowatts
o
be imported f c Czechoslovakia.
Dyy zeAOSS.107a ia, were received in the spring of 1951. A third ?hir'oine is t
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AIR FBI ]AEC J
IMn9~. ?er__i.a. n10,ibutin, Indientm~d Rv "X"; Field Distsil-4ea1 By
REPORT
DATE DISTR. 12 June 1953
NO. OF PAGES 50
REQUIREMENT NO. RD
REFERENCES
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d. The dam is to be perpendicular to the direction'of the stream. The current of
25X1
the stream at this Doint is slow.
the foundation is seven meters deep.
e. A retaining wall of rows of poles is being laid around the artificial basin
upstream of the dam.
the derivative canal which is to be located
lydOO to 2pOOO meters downstream of the dam. Two Mannesmann tubes have been
received for inserting into the underground course'of 150 meters to the plant
building. The tubes have an inner diameter of 1.10 meters.
g. The plant building will be approximately 70 by 40 meters in size and will be
located approximately 2,000 meters downstream--cif the'dike'and 200 meters west
of the left bank of the river.
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25X1
h. The foundations of the dam and the plant building have been completed. Excava-
tion work has just started on the forced conduit tunnel and on the dam, the
artificial basin, and the retaining wall of the basin.
i. The work is conducted by a hydraulics construction section subordinate to the
Ministry of Electrification. Nikola Panazhotev, engineer, directs
the project. 25X1
Construction personnel consists of 400 Trudovaks and 100 civilian workers.
k. Transportation facilities consist of a temporary narrow-gauge rail line, 50
centimeters, which has cars of 0.75 and 1.25 cubic meter capacities and five or
six motor vehicles belonging to the Trudovaks.
4. The hydroelectric central at Asenovgrad (N 42-01, E 24-52), Spring 1951:
a. Work was begun in 1947 and-is scheduled for completion at the end of 1951; the
pl~an,:fr;t~h`Ls "central wa..rawn up in 1940.
b. The "Asenitsa" plant is to have a capacity of 25,000 kilowatts and the "Chaya"
plant is to have 'an: npiit, of 18,000 kilowatts. 25X1
the position or characteristics of the
a derivative canal leads out to feed the two plants.
ASENOVGRAD
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d. The derivative canal runs along thev LUsj-de:c 60 or 0 motors d 25X1
f
o
the Chaya River, immediately east of the river, the
length of the first part of this canal, from the dam to he "Chaya" plant 25X1
alternately in the open and in three tunnels which vary between 100 and 170
meters in length. The second section, from the "Chaya" plant to the "Asenitsa"
plant, is eight to 10 kilometers long and proceeds :aloklg the.-hl1hidei ;some..
times in the open and sometimes in tunnels. .A total of six. tunnels are located
along this section, varying between 90 and 400 meters in length.
Derivative canal detail -- open air section
i
Derivative canal detail -- tunnel section
~~j
e. The plant buildings will be approximately O. ;meters -by' 80 meters in size and
ote :.story high.
the primary high power line which goes out from the
sen sa piant to -the Krumovo (N 42-05, E 24-l.8) area is located a
roxi-
pp
.mately 4,500 meters west of Katuritsa (N 42-05, E 21i-51). The pylons are
iron trellises which have pyramid bhapeeawith quadrangular sections.
g. The plants, as far as the buildings are concerned, are already completely
finished. The derivative. canalp,.in, the ..opefrlatid in. the tynnels:~, is !alab dom-
pletQdl.along-flits entire route.
h. The work is being carried out by a hydraulics construction section subordinate
to the Ministry of Electrification.
i. Work personnel consists of 2,000 Trudovaks, 1,000 to 1,200 civilian laborers,
and 200 to 300 political prisoners.
J. the mechanical equipment is absolutely inadequate and 25X1
'
a.
a he various Jobs are being done by hand.
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5. The hydroelectric central. at Chernogorovo (N L2-l6, E 2L-24), Autumn 19491
a. Construction was begun in 1947 but was suspended in 1949 because of a lack of
funds. F_ I 25X1
b. The central is to have =;i-,y of 20,000 kilowatts.
c. The dam is to be perpendicular to the direction of the stream. Its wall,Uhich
will be of stone masonry, will be 30 to 40 meters long at the top.
25X1
d. The derivative canal is inserted into the dam, with a pressure-regulating
building which has iron water gates. The canal runs in the open on the hill-
side; in the immediate vicinity of the plant, the canal is approximately 60,
meters above the river-bed. The canal has a length of four or five kilometers.
HERNOGOROVO
Derivative canal, open air.
PICHIGOVO
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The dam and the derivative canal are finished and the foundation of-the-plant
.buildihi&,has'been compldted.' '
f. The work, until its suspension, was carried out by a hydraulics construction
section subordinate to the Ministry of Electrification.
engineer
was director of the project.
25X1
h. Kramorov (fnu),I engineer was responsible for work perfora-
ance. Kramorov is a naturalized Russian who emigrated H,tc the USSR in 1933..
i. Work personnel consisted of 150 Trudovaks and 300 civilian laborers,
j. There was absolutely no mechanical equipment. All work was carried out by
hand.
6. The hydroelectric central at Teteven (N 42-54, E 24-16)., Summer 1919:
a. Work was begun in 19116 and is scheduled for completion at the end of 19520
b. The central will have -.an,-,:Inptt, of 30,000 kilowatts.
Derivative canal, sometimes
in the open air and sometimes
in tunnels.
~
C~
~'~'ylM~rs~as~rarrwrsr.
rx.wri
7'ETEVEN
The machinery has been received
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f. The plant building will be a 1-story construction approximately 40 by 30
meters in size.
g. The derivative canal is almost completed and the foundation has been co"lete4,
he The work is conducted by a hydraulics construction section subordinate to the
Ministry of Aleotrification.
i. Ivan Khinchev, engineer, is the director of the project. ?GN14
7.
j. Labor personnel consists of 400 Trudovaks and 1100 civilian workers.
l 25X1
one section of the derivative
cana
, which has a length
of two or three kilometers. It is five meters wide, approximately two motors
deb faced in sto asonry, and reinforced with maitha cement. The Aeotios
runs in the open and through three tunnels, the la "t,
of which has a length of 100 to 120 meters. There are also two canal bridgas
between 180 and 200 meters long. In the immediate vicinity of the plants the
derivative canal is 35 or 140 meters above the river bed.
25X1
k. Transportation facilities include a temporary narrow-gauge line one to two
kilometers long, private carts drawn by quadrupeds, and "some' motor ?ebioles.
The hydroelectric central at Karlovo (N 12-38, E 24-149), Spring 19501
a. Construction was begun in 1949 and is scheduled for completion at the end of
1952.
greater than 25,000 kilowatts.
power input
would be
c. The dam is of stone masonry reinforced with maltha cement. It is perpendievias
to the direction of the stream and is inclined. Its length is 20 meters,
its height eight to nine meters, its width six meters at the top, and width
at the bottom unknown.
nature of the terra indicates thatt derivative
canaon. the
e. The-plant building is located approximately 1,800 meters downstream of the
dam, on a hillside, 10 or 15 meters above the bed of the Suohurwma (Smshiteat)
River.
f. The dam is in the process of canpletion and the power plant has already been
completed.
g. Work is being carried out by a hydraulics construction section subordinate to
the Ministry of Electrificatione
i. Labor personnel consists of 400-500 Trudovaks and 100 civilian workerst
j.
Transportation facilities consist of rivate vehicles, for which re 4 is paid
accordin iim to tonne 25X1
the number of auto vehicles is completely inadequate.
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k. Sketch of the Karlovo plant area:
Plant I under construction.
Plant II in operation.
(Nothing known
concerning KARLOVO
derivative canal)
8. The hydroelectric central at Belene (N 43-L0, E 2506), Autumn 19501
a. Work was begun in 1917 and is scheduled for completion by the end of 1951,
b.
c . The dam wi-ll be pe'rpendi otilar, to the..:streamX1
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e. A high-power line extends from the Mala 'suxkva plant to Samokov (N t2-19,
E 2333).
f. The high-power line from the Simeonovo plant extends to the transformer station
(for reducing the voltage) which is located in Boris Park in Sofia.
g. The pylons of both power lines are iron trellises with pyramidal bodies and
quadrangular sections 1.50 meters wide at the base, nine or 10 meters high, and
set at distances varying between 80 and 130 meters depending upon the terrain.
Three alternators of Brown Bovery make and one electric air cyan
of approximately five tons capacity are visible.
25. The hydroelectric central at Pancherevo (N 142-35) E 23-24), July 1951,
a. The central was constructed by a Bulgarian contracting company in the years
1918-1920. 25X1
1, y'aom, 3 GERMAN
N!
sPANCMEREV Nb
SCALE 1:125,000
vcftw& Forced conduit, in a trench.
== = Derivative canal, in a tunnel.
b. The plant has ancippatb of 25,000 kilowatts and furnishes power for illumina-
ting the city of Sofia.
c. The dam is 150-180 meters long at the top, eight or 10 meters high, and 150
meters wide at the top.
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d. The derivative canal is inserted directly into the dam through a pressure regu-
lating building which has two iron defenses with toothed rack rods. It enters
immediately into a tunnel. for a distance of approximately two kilometers, at
a constant slope of 0.5 by one meter.
e. The forced conduit is inserted directly into the derivative canal. It is an
open trench with a slope of approximately 0.35 by one meter. It has two 25X1
Mannesmann tubes which have an internal diameter of 0.80 meters, set 1.20
meters apart in a trench.,
f. The plant building is one story high, of stone construction, and has a 2-slope
roof of Marseilles-type tile. Four small buildings which house the headquarters
and living quarters of the personnel are located in the immediate vicinity of
the plant building. 25X1
g. The primary high power line extends to Sofia through the Pancharevo and German
(N L2-37, E 23-25) areas. The pylons are iron trellises with pyramidal bodies
and. quadrangular sections.
26. The hydroelectric central of the aqueduct Boyana (N 42-39, E 23-16) - Sofia, July
1951:
M
0
ft
SCALE 1:50,000
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J END
Canal br;a3e.
t1
J \ ~\~~J~~q~11 i1111q
J \y\\\\\~~.1111111 t~1
5 CAL E is /So 000
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28. The hydroelectric central at Barakovo (N h2-O4, E 23-014), August 1950:
a. The plant began operating in 19211. Prior to nationalization, it was the property
of Ivan Balabanov, now of Milan, who was condemned to death in contumacy in 1948-
1949 for confessed "criminal acts" on charges of injuriously exploiting the 25X1
working class.
b. I the Input',. of the plant
than 20,000 kilowatts.
d. The plant supplies electric power to the Barakovo paper mill and to the neighbor-
ing sawmills in the city of Gorna Dzhumaya (N 142-O1, E 23-06). 25X1
29. The hydroelectric central of Batanovtsi (N 112-37, E 22-57), Summer 1950:
a. This central began operating in 1920-19211.
was not less than 20,000 kilowatts.
tr:ibtition of power.
its input
25X1
the feeding canal and the dis-
Its location is as follows: 25X1
64 ly y 1+~~
\\. 4, .111N111~111~... ?\~ ..l~
/
I'I III
li r r
it
gyp!
I ~Y
Nq
SCALE 1:50,000
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Frced ca dgit urlier &,nstra ,i
z&edeomkt;n-a Ann/ /k
cerd, ctt present
SCALE l:50,000
XRICHIM
0
tuI w
m N ~- ut
'N I
W-1 0
,'3 N
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~FO v
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cD N
It cD
c+ 'd
0 ci-
m cr
K cD
\0 N
r-71 NO
NO
Zr-
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The dam is located approximately 150 meters from. the -plant building.
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d. The forced canal is inserted directly into the dam. and runs to the central
through a subterranean course l,OO0 meters long. On the bank' opposite the bank
an which the above-mentioned .,. nduit is io cated, another forced conduit, pgrftyy
open and partly undergrcua3rd, 1oted to feed the other turbine which
is part of the enrlargement proje,t.
e. Two prainary lines leave the plant-one to Peal,.ter?a (N 42902, E 24-18), and the
other to Gara Kris^him (N 42-O`-', E 214-32). The pylons for both lines are iron
trellises with pyramidal bodies and quadrangular sec?t.io'.s. 25X1
31. The hydroelectric central at Meta (N 43-O9, E 2 ::-1O) STIr ng 1950:
a. This central was constructed. Er;largemevl.t wc: k was vu dertaken during 2.946-1949
for the purpose of raising the plant's capacity as well as enlarging the
buildings.
25X1
the wtb411w of the central is not 7 X1
c. The dam is constructed of stone with, maltakaa cement a : hr its axis perfectly
perpendicular to the digit?ection of the s, ,ream. Its wall is reinforced with
concrete for a layer of 1.20 meters, while the base; i; ,,;,y.vered with cut stone.
The dam is 25-30 meters long at the base, 50-60 meters long at the top, 35-40
meters long in the middle, 15 meters wide at the l ass four meters wide at the
top, and 15 meters high. The pressure b iildings are located at the base of the
dam and have iron gates which are regulated by means of cogged chains. There
are three of these installation;:', ,all. of which ?wire aper i;ur es of 3.60 meters
in width and two meters :1.'o. ?.:eight.
Detail of the pressure building and perspective of the dam:
k--25 30K----~
d. There are three derivative canals which are insar;;,,ed into (three) reinforced
concrete tubes. The conduits extend to the plant w1%loh is located 100 meters
e. The basin is approximately one kilometer long and 400 meters wide.
f. It was necessary to divert the river for a di5stanoss of one kilometer at a
maximum distance of 300 meters from its original bed; for this purpose, a wall
was constructed for a length of two kilometers. This construction is of packed
earth with an inside reinforcement of a stone wall and maitha cement. The wall
is three meters thick at the top and a height of 10 meters, in the vicinity of
the natural elevation of the to ain in which is set,
g. The plant building is located on an islet 1,00 meters downstream from the dam.
It is one story high and has a 4-slope, red tile roof and wide side windows both
upstream and downstream. The building is 50 meters long and 20 meters wide.
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SCALE l: 50, 000
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a. The central began operating in 1926-1928.
i. Concerning the primary power line, it leaves the 25X1
plant in the direction of Mezdra, and that it probably extended to that city.
32. The hydroelectric central at Lukovit (N 43-12, E 24-10), Autumn 1949s
it is at least 15,000 kilowatts. is located as toUlostss
25X1
b. There is an old plan to enlarge the central,,,bait the plan has not yet been
carried out.
The dam is located 600-700 meters from the sentral.
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NOTE: Nothing known concerning
derivative canal.
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33.
d. The plant building is on the right bank of the Panega River. It is a 1-story
construction and has a 2-sloped roof of standard tiles.
e. Two primary high power lines lead out from the plant. One goes to Pleven
(N 43-25, B 24-36) and the other goes to Cherveni Bryag (N 43-16, E 24-06).
The hydroelectric central of Boykovo (N Ll-59, E 24-37), Autumn 1949:
a. The central began operating during 1928. It has an: input, of 15,000-20,000
kilowatts,, and is located as follows:
PLOVDIV
10\1NI Wi 1411N 141 /I /N//Ii//I///// N
?111 ////l/////iii ., i I I1
Loading canal.
Reservoirs
1. Reservoir of the aquaduet to Plovdiv.
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31.
-4o-
The derivative canal is inserted directly into the dam through a pressure regulat-
ing building which has an iron gate. After a course of approximately 200 meters,
it arrives at two underground collecting reservoirs, then continued on to the
plant building which is &pjprd bLtely 19200 meters past the reservoirs. Informant
could give no details concerning the reservoirs. Throughout its complete course,
the canal is laid out in trenches and. covered with concrete plates. It has a
constant slope of 0.10 by one meter. The discharge canal, consisting of an aqu;e-
duct, continues to a collecting reservoir 1400 meters from the main station of
Plovdiv*
b. The dam is 30 meters long at the top.
e. Concerning 'the main power line,
locality.
a. This cente,B,l was constructed prior to 1925- It has -are::dnpliti-;ot 4Ppr0tsl1,*.
's. 15,000 kilowatts and 1A nna+ota am e?? -
it runs to the Plovdiv
The hydroelectric central of Stara Zagora (N 42-25, E 25-38), Winter 1950:
NOTE: Nothing known concerning the dam
and derivative canal.
lb
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b. Concerning the feeding canal,
aquaduct.
c. The plant building is a 1-story structure and has a 2-slope terrace roof of
Marseilles-type tile.
d. The primary high power line extends to the Stara Zagora locality.
The hydroelectric central at Devnya (N 43-14, E 27-33), March 19511
a. The plant began operating in 1926. - 1 is 1itt',
is not less than 25,000 kilowatts. The plant is located ae
dam and derivati canal.
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NOTE: Nothing known con4erning
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b. I ]the feeding of the central. It
seems to be fed from the aquaduct at Lake Deven, Varna.
c. The primary high power line goes to the city of Varna. Its pylons are iron
frames with pyramidal bodes and rectangular sections and are eight or nir.,
meters high.
36. The hydroelectric central at Karlovo (N b2-38, E 24-49)., Spring 1950:
a. The central began operating during 1925. It has a power input of not less
than 20,000 kilowatts.
c. The plant building is located 800 meters north of the city of Karlovo. It
is a 1-story construction and has a terrace roof*
d. The high power line from the plant extends to the Karlovo locality.
THERMOELECTRIC PLANTS
Thermoelectric Plants Under Construction
37. The "TETs Maritsa III" in Dimitrovgrad (Rakowski section, N b2-03, E 25-35),
June 1951:
a. Construction was begun in 194.9 and the plant is scheduled to be opened on
9 September 1951.
m. ?Jl lnuu,u?I/, ,llul/nl
t3
t t.tit ?11/,,,, llll111111
ll,11ki1 JI
/ii i, I
r!
{fill
.~~? Il It l{l ~/ a ~
TET
3 a Maritsa III
///, l' I l l { km 500
T?, Pl-?t----}-
Rakowski
Station
b. The central is to have an input of 125,000 kilowatts*
c. The machinery is of Soviet manufacture and has already arrived.
d. The TETs Maritsa III :is to furnish power for the industrial establishments
now under construction in the Rakkvski section of Dimitrovgrad.
e. Work was scarcely finished on this plant when a second thermoelectric plant
of the same power input and capabilities was begun.
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f. The plant building is of reinforced concrete construction, two stories high,
50 by 40 meters in size, with a twin-sloped terrace roof. Various smaller
buildings which serve as directorate headquarters,, offices, and lodgings are
:Locatdd'eround the plant building. A circular chimney of reinforced concrete
construction, 105 meters high,18 meters in diameter at the base, and five
meters in diameter at the top, is located approximately 120 meters south of
the main plant building.
g. The cooling tank is located 120 meters north of the plant building and the
water is pumped in from the Maritsa River. The tank is completely constructed
of reinforced concrete and will be used for both plants.
h. Work is in the process of completion.
I. The project is being carried out by the Bulgarian organization known as
""Stroi Obedineni'Dimitrovgrad" (company for the construction of'the city
of Dimitrovgrad), which is subordinate to the Ministry of Public Works.
J. (Leorgi Penchev, 110-4 years old, Is the political director of the project.
The architect Sotirov (fnu), 45 years old, is in charge of work performance.
k. The labor force consists of 800-1,000 Trudovaks and 1,500 civilian workers.
1. Transportation facilities and machinery in use consist of about 20 motor
vehicles of various tonnages of Soviet and Czechoslovakian manufacture, two
Skoda excavators, and one crane on tracks.
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38. The "TETs Maritsa II" in the Rakovski section of Dimitrovgrad, June 1951,
a. Construction was begun in the spring of 1950 and is to be completed during 1955-
b. The central is to have a power input of 250,OOO kilowatts.
c. Work at present is restricted to land preparation and to builds the founda-
tion of the plant building. For 25X1
a sketch of the location, see paragrpt)h 37a, above.
39. The "Moshino" thermoelectric central of Pernik (N,42-36., E 23-03), located in
Moshino village (N 1.2-36, E 23-05), May 1951:
a. Construction was begun in 1948 and is scheduled to be finished on 9 September
1951.
/
/ w
/
f--3ktll--'!
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c. The plant building is three stories high, 50 by 40 meters in sizes and con-
structed of reinforced cement. It has a twin-slope terrace roof, with only
a slight slope. Its height is approximately 20 meters. Each story has wide
windows about five by three meters in size. Two circular chimneys 115 meters
high, 16 meters in diameter at the base, and five meters in diameter at the
top, are located in the immediate vicinity of the plant building. An unknown
number of smaller buildings which serve as headquarters, offices, and lodgings
for the plant personnel are located around the main building. 25X1
b. The plant is to have an input of 250,000 kilowatts.
two primary high power lines extend from the plant. These
10.
lines were not in use as of May 1951. The pylons have an iron framework with
h. The plant area is approximately three kilometers (east-west) by two kilometers,
and is enclosed by a fence 2.80 to three meters high. The posts are set '25X1
concrete.
pyramidal bodies and rectangular sections.
g. Construction work is in the process of completion.
i. The plant is to be connected with the Pernik railroad station by a standard-
arrived at the plant in early 1948. It was imported fr..omthe USSR
There are two cooling tanks, circular in shape, 52 meters high, outer diameter
approximately 40 meters, which are located 80 meters from the plant building.
:Informant did not know how water is obtained for the tanks. 25X1
the destination of the power produced by the plant
gauge line eight meters long. A bridge approximately 250 meters long is to
be built over the river three kilometers from the Pernik station. At present
only land preparation work is under way.
The project is being carried out by Sovbolstroi, the joint Soviet-Bulgarian
construction company. Both Bulgarian and Soviet teciv.ical personnel are
employed.
k. Engineer Bachev,l (Bulgarian, is in charge of work performance. 25X1
1. The labor force consists of 2,500 civilian workers and 600 Trudovaks. Work
is done in three shifts per day.
m. Transportation facilities consist of 40-50 motor vehicles of various tonnages,
of Soviet, German and Czechoslovakian manufacture, and three or four kilometers
of a permanent narrow-gauge rail line served by four steam locomotives.
Thermoelectric Plants in Operation
The "TETs Stalin" of Sofia, July 1951s
a. Work was begun in 19147-1948 and was completed in April 1950. The plant has
a power input of 75,000 kilowatts.
b. To increase the power capabilities of this central, a second thermoelectric
plant was begun in the autumn of 1950-by Sovbolstroi. This plant will double
the present input of 75,000 kilowatts, and is to be completed during 1951.
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c. The plant building is of reinforced concrete construction, three stories high,
approximately 6o by 50 meters in size, 4.0 meters k, gh, and has a terrace roof.
tcum smaller buildings which serve as directorate headquarters., workshops.,
and lodgings for the personnel are located around the main plant building.
d.. The two cooling towers are located 120 meters from the plant building. They
are of reinforced concrete construcction, cir ula,r, ;38 meters high., and have
an outer diameter of 24 meters.
Go
91. The thermoelectric central of Pernik, Aprfilw 1951:
a. This plant was built in 1922-1924 and has a pc we,,., input of 30,O00 kilowatts.
7
J ! /
Thermoelec ri,cc
plant and-t, con-
struction, see'
rve .
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-b7-
b. Amelioration work is under way, and the power capacity is allegedly to be
doubled. This work was 'started in the autumn of 1948 by Sovbolstroi and is
to be finiwbed during 1951? 25X1
42. The thermoelectric plant of Kurilo (N 42-50, E 23-19), July 19512
a. This plant was built in 1927-1930 and has in input of 60,000 kilowatts. It
supplies power for the industrial complexes of Sofia. Two primary lines proceed
south from the transformer room, in the direction of Sofia. The pylons are
the iron frame type, with pyramid bodies and quadrangular sections. The plant
is located as follows:
N
Pumping Station.
Pressure Canal*
be The plant has the following parts:
(1) Machine room, located in a reinforced concrete building 50 by 25 meters
in size, which has a twin-sloped roof of Marseilles-type tile. The
building is 26 meters high.
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(2) Boiler room, located in another reinforced concrete building, 50 by 40
meters in size, 22 meters high, which has an "irregular-eloped? tile
roof. There are six boilers which'are 25 meters long.
There are two a ]ptiaai burners, ransverse'axis 3.50 meters, and con-
jugate axis two meters? which are located 80 centimeters apart. The
chimneys are of metal construction, 25-28 meters high, and have a diameter
of 1.50 meters at the top.
(3) Transformer room, located in a reinforced concrete building, 50 b25X1
meters in size, which .has a terrace roof.
(4) Personnel headquarters are. located in another reinforced concrete boai.lding,
50 by 12 meters in size, which has a terrace roofo
o. The cooling tanks are oomplete3ry constructed of reinforced concrete and are
.covered by reinforced oonotete lids. They are 80 meters long, 66 meters wide,
3.50 meters high, and are supported by pillars. The pumping station has eight
pumps of Brown Boveri make and is located in a reinforced concrete construc-
tion 18 by eig1t meters in size.
1.50 m~y,,J 4.50 m.
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-49-
3. The
d. The water for the cooling tanks is obtained from the Isktar River and from six
artesian wells when the river is dry.
e. The water pressure canal is drawn from the river by means of a pumping station
and runs in the open air through a course of 800 meters in reaching the plant
building. The canal trench is faced with stoke mason., and bas .,~, d~4ata~-at slope
of 0.2 , x. 1 meters . an ordinary trapezoidal section has a- height of three meters,
a small base of 1.50 meters9 and a large base of eight meters.
f. The six artesian wells have a depth varying between 1.80 and 200 meters. Their
cy]Lindxic4 tubes have an inner diameter.of l.,50 meters for the first 40 to
80 meters n depth and narrow to 25 centimeters for the remainder of the
distance.
The plant has standardmgaMe rail connections with the Ktr ?-ilo railroad station.
25X1
thermoelectric central at Gorna Oryakhovitsa (N 43-07 E 25-41)., Spring 1951:
was, in charge of work performa xceo
Atanasov9 engineer
a. This plant was be Z in 1947 and was finished in the autumn of 1950.
X4
b. The plant has a power input of 10,9000 kilowatts.
Most of 25X1
the power produced at this plant is used to i:til.=im to thi ' oi,? .a of ar ta,-
Orya'khovitea. The plant 'building Is of reinforced corac:re~.a;, ~t~ t ht'lo!nj 50,
by 40 meters in sizes, and has a terrace roof. The foUowing is a front view
of the plant buildings
D
51 me
n
M
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M
0
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?
?
W 4,
4
" x ?GODECH
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X A P ,) 9DTEV6-?AD i ` "' - ?7 rlt Ri,
x h( \~ rt FVl4/ !
V ~ X f
* \ rix1rn IOarL M,~ - I ?SMoL yAN
f5a A r x }
WIVEI'l OF fir" ~x~} +
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 Gm RotfO
x kit p~,rv+y
kk
k x % ~
Is- % I.
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APPENDIX B _54_
E[roelectric Plants in the Rila Flanina
To Sofia - 76 kilometers
LE 0END
1. Connecting conduits,
2. Artificial lake with dam.
3. Bed of Tsarska Bistritsa River.
4. I collecting tank.
5. Underground forced conduit.
6. I hydroelectric central.
7. Ordinary underground conduit.
8. II collecting tank.
9. Underground forced conduit.
10. II hydroelectric central.
3.1. Ordinary underground conduit.
12. Compensation tank and filter installation.
? Knyazhevo
5ka%;
DragalevtsiQ ` 6",
'b
,
O Boyana
SOFIA
Assemble as follows:
.54-
-55-
0 Simeonovo
0
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25X1
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APPENDIX B (Continued) -5-
D
p ?Bistritsa
%Zheleznitsa
lTarlovo
Dolni-Okol(i)
?0?
,0'
? o'
o'
,0?
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Oorni-Okol
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APPENDIX B (Continued) -56-
Dospey0 .O
d,
d
Govedartei (q)
Malagra?
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