Chapter
1
Appraisal
and Property Requirements
Page
1-18i
Based
upon potential volcano activity, FHA mortgage insurance is not available
in lava flow zones 1 and 2 Areas.
Island
of Hawaii: In 1971 HUD established a policy which responded
to volcanic hazards on the Island of Hawaii. Under this policy certain
areas were identified as being unacceptable for HUD programs. This
policy was re-evaluated and the findings were posted in 1991. Except
for a newly designated area to the northeast of Mauna Loa, the 1990
and 1971 HUD non-participation areas are not significantly changed
in location or extent. The 1990 boundaries are more closely based
on known geologic features and current estimates of the U. S. Geological Survey (USGS)
Hawaiian Volcano Observatory.
HUD,
in consultation with USGS. geologists at the Menlo Park Center in
California and at the Volcano Observatory, reviewed 20 volcanic
zones involving lava flows, subsidence and ground fracture, tephra
falls, volcanic gas, and pyroclastic surge. Ultimately HUD identified
two zones as being particularly hazardous. These are defined by
the U.S.G.S. Observatory as lava flow zones #1 and #2.
- "Zone
#1 consists of the summit areas and active parts of the rift
zones of Kilaua and Mauna Loa
"*
- "Zone
#2 consists of several areas that are adjacent to and downslope
from the active rift zones of Kilaua and Mauna Loa and therefore
are subject to burial by lava flows of even small volume eruptions
in those rift zones."*
It
was concluded that these two zones should be classified as non-participation
areas for the purpose of HUD program assistance. For the purpose
of simplification and ease of administration the two zones were
integrated so that a single (composite) zone or non-participation
boundary line provides the basis for HUDs volcanic hazard
policy.
Most
of the HUD non-participation area falls within parks, conservation
areas, or other state and federally-owned lands where housing and
other urban uses are prohibited. However, a limited extent of the
non-participation area will not be enclosed by federal or state
lands. In these areas we must rely entirely upon lava flow boundaries
for zones #1 and #2, as defined by the USGS.
Hawaiian
Lava Flow Maps and other information on this can be located on line
at the USGS Hawaiian Volcano Observatory
site. Select Lava Zones.
(*Mullineaux,
D. R., Peterson, D. W., and Crandell, D. R., 1985, Volcanic Hazards
in the Hawaiian Islands.)
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