IMPACT OF METRO SUBWAY SYSTEM

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B05703A000800090013-5
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 4
• Document Creation Date: December 28, 2016
• Document Release Date: December 18, 2003
• Sequence Number: 13
• Publication Date: October 14, 1970
• Content Type: REPORT

Approved For ease 2004/02 I DP78B05703> 0800090013-5
Impact of Metro'Subway System
Construction of a Metro Subway Tube, within 38 feet of
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service to begin in 1978. During the period of construction two
conditions may be created which could disrupt the operation of
sensitive equipment, thereby greatly reducing the ability of
is scheduled for 1974 through 1976 with passenger
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(1) dewatering operations for tunnel construction which could
result in building settlement, thereby requiring underpinning
for building footings, and (2) excessive vibration which would
affect sensitive equipment.
DECLASS REVIEW by NIMA/DOD
Approved For Release 2004/02'1 ; C"A RDP78B05703A00080009
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to perform it's mission. These conditions are
 Approved For ease 2004/028 C RDP78B05703 0800090013-5
Power Augmentation Requirements
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Electrical power brownouts as experienced in the Washington
metropolitan area this past-summer are expected to continue through
the next several years. In addition, electrical power blackouts
such as those experienced by several metropolitan areas can also
occur.. On occasion I has been forced to reduce power
requirements by discontinuing elevator service, reducing air con-
.ditioning supply, etc., during power brownouts. The building
would be inoperable during power blackouts because of the lack of
an emergency power supply. Emergency power can be provided at
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for approximately $1,000,000. However, if
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Is relocated to the Headquarters compound, sufficient emergency
power is available for this facility.
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Parking,&Neighborhood
There are 1,650 employees working in I L and there
are-only 625 Navy Yard parking spaces available for them. Con-
sequently, there are several hundred NPIC employees who must park
each day on the streets of Southeast Washington. This is a
deprived area and there are frequent acts of vandalism directed
against the automobiles left on the streets. There were five
such incidents in September 1970. Further, employees are fre-
quently accosted while walking from their automobiles to the
Building, even during daylight hours. Any employee who is
required to work after hours is instructed to bring his auto-
mobile into the main compound at 4:15 p.m., which is the end of
the official work day and the hour of departure for most employees.
There is little likelihood of any improvement in the character of
the neighborhood in the foreseeable future.
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Vibration
Probably the most significant single consideration is the
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presence in
of?excessive vibrations and the prob-
ability that these will get worse. Many of the types of sensitive
high magnification equipment used in the building are vulnerable
to the effects of vibration. It has been determined that the limit
of vibration for light tables is 1 micrometer displacement at
approximately 20 hertz frequency. This limit is now exceeded in
some areas of the building and it is being approached in others.
Certain fixed equipment can be mounted on,special bases at very
high cost. For example, site preparation for the high-precision
However, there is no
economically feasible method of.reducing the vibration- areas of
the building where normal portable equipment such as light tables
are used. As the R&D efforts produce more sophisticated equipment,
vibrations will become a more critical factor. Relocation to a
new building which is designed to minimize ambient vibrations would
provide the proper environment for the full exploitation of the
new equipment. This could not be done in
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