The purpose of this zone is to avoid development hazards in
areas of the City which, according to available soils information,
may have moderate to highly compressible soils. These regulations
apply to areas in the City which have Braillier, Bergsvik, Coquille-Clatsop
Complex and Coquille Variant soils. Braillier and Bergsvik soils are
organic soils with high fibrous vegetative content which are highly
compressible under structural loads. Coquille soils may be subject
to moderate to high compressibility depending on the size and structural
load applied by a building due to a high water table and poor drainage.
Since these soils can cause severe problems for development, this
zone utilizes special regulations designed to minimize hazards by
requiring use of sound soils data and engineering principles to determine
development techniques and by requiring property developers to assume
responsibility for certain hazard-related costs.
The City may require an on-site soil survey report and a report
by a licensed engineer for large-scale commercial, industrial or governmental
structures, multifamily residences, or other structures which would
cause a heavy loading of soil in areas of the City with Coquille variant
silt loam or Coquille-Clatsop complex soils.