Geologic Hazard Categories - San Diegoo L a 0 N a c i o 0 F a u l t ...
Appendix F4.11 Geologic Unit Summaries, Hazard Areas, and ......Appendix F4.11 Geologic Unit...
Transcript of Appendix F4.11 Geologic Unit Summaries, Hazard Areas, and ......Appendix F4.11 Geologic Unit...
-
Appendix F4.11
Geologic Unit Summaries, Hazard Areas, and Boring Locations
-
Appendix F4.11
Geologic Unit Summaries, Hazard Areas, and Boring Locations
-
Appendix F4.11 Geologic Unit Summaries and Hazard Areas
East Link Project Final EIS F4.11-1 July 2011
TABLE F4.11-1 Summary of Geologic Units and their Engineering Properties
Geologic Unit (Map Symbol) Description General Constructability
Density and/orHardness Strength Permeability
Liquefaction Potential a
Modified land (m) b
or
or
Fill and/or graded natural deposits that obscure or alter the original deposit
Varying, depending on whether nonengineered or engineered; poor foundation support and potentially poor cut stability if nonengineered, depending on composition and density and/or hardness of material; excellent foundation support and cut stability if engineered
Very soft to stiff or very loose to
dense Potentially low Variable Potentially high
Mass wastage (Qmw) or
Colluvium, soil, landslide debris, and organic matter; common below springs where peaty deposits are also present; mapped on steep slopes; deposits, both mapped and unmapped, include abundant landslides up to 500 feet long
Poor foundation support, poor cut stability
Loose to dense and soft to stiff;
variable degree of consolidation, depending on
material in colluvium and its
coherency
Potentially low Variable Potentially high
Landslide (Qls)
Blocks of surficial deposits transported downslope en masse by gravity; numerous unmapped areas of both landslide and related mass-wastage deposits occur along slopes; landslide terrain, often including benches that slope back into the hillside and have wetlands and peat deposits
Poor foundation support, poor cut stability, potential for additional slide movement
Very loose to very dense or soft to hard; variable
degree of consolidation, depending on
material coherency
Potentially low Variable Potentially high
Wetland deposits (Qw)
Organic-rich sediment, peat, and fine-grained alluvium, poorly drained and intermittently wet; not all deposits mapped
Poor foundation support, poor cut stability, high occurrence of groundwater, wet-weather sensitive, poor soils for reuse as engineered fill due to wet conditions and a high fines and organic content
Very soft to medium stiff or very loose to
medium dense
Potentially low Variable Potentially high
Tideflat deposits (Qtf)
Silt, sand, organic sediment, and detritus, with some shells, historically exposed in broad coastal benches at low tide and now covered with fill
Poor foundation support, poor cut stability, high occurrence of groundwater, wet-weather sensitive, poor soils to reuse as engineered fill due to wet conditions and generally a high fines content
Very loose to dense or very soft
to stiff Potentially low Variable Potentially high
-
Appendix F4.11 Geologic Unit Summaries and Hazard Areas
F4.11-2 East Link Project Final EIS July 2011
TABLE F4.11-1 CONTINUED Summary of Geologic Units and their Engineering Properties
Geologic Unit (Map Symbol) Description General Constructability
Density and/orHardness Strength Permeability
Liquefaction Potential a
Younger alluvium (Qyal)
Silt, sand, gravel, and cobbles deposited by streams and running water; locally contains soft peat lenses
Poor to good foundation support, depending on composition, density and/or hardness, and construction type; some soils might be wet-weather sensitive; some soils might be suitable for reuse as engineered fill, depending on amount of fines content; poor where peat materials occur
Loose to dense or soft to stiff
Low to medium Variable
Potentially high
Lake deposits (Ql)
Silt and clay with local sand layers, peat, and other organic sediments deposited into Lake Washington; most mapped areas are lake-bottom sediments exposed when Lake Washington was lowered in 1916; at many locations, the lake deposits are thin and overlie a dense substrate; commonly capped by fill to improve building sites
Poor foundation support; poor cut stability; high groundwater occurrence; wet-weather sensitive; poor soils for reuse as engineered fill due to wet conditions and a high fines content
Very soft to medium stiff or very loose to
medium dense
Potentially low Low Potentially high
Vashon recessional outwash deposits (Qvr)
Layered sand and gravel, deposited in outwash channels of melting glaciers during the ice retreat; also includes deposits that accumulated in or adjacent to recessional lakes; deposits less than about 3 feet thick not shown on map
Good foundation support and cut stability when undisturbed; potential groundwater occurrence; soils suitable for reuse as engineered fill
Loose to dense Low to medium Medium Potentially
high
Vashon recessional lacustrine deposits (Qvrl)
Thinly layered silt and clay with local sand layers, peat, and other organic sediments, deposited in slow-flowing water and temporary lakes
Poor to good foundation support and cut stability, depending on composition, density and/or hardness, and construction type; wet-weather sensitive; poor soils for reuse as engineered fill due to high fines content
Very soft to stiff Medium Low Low to medium
Vashon till (Qvt)
Compact mixture of silt, sand, and gravel, glacially transported and deposited under ice; contains layers of sand and gravel; cobbles are common; upper 3 feet of till generally weathered and only medium dense to dense
Excellent foundation support and stable cuts when undisturbed; low groundwater occurrence; wet-weather sensitive; soils suitable for reuse as engineered fill depending on moisture content
Dense to very dense; sand
commonly less dense
High Low Low
Vashon advance outwash (Qva)
Sand and gravel deposited by streams from advancing ice sheet; silt lenses locally present in upper part and common in lower part
Excellent foundation support and stable cuts when undisturbed, unless below the water table or exposed to water; potentially high groundwater occurrence; soils suitable for reuse as engineered fill
Dense to very dense High
c High Low
-
!!
!!
!!
!!
!!
"
"
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " "
" " " "
" " " "
" " " "
" " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " " " " " " " " " " " " " " " " " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " " " " " " "
" " " " " "
" " " " " "
" " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
" " " " " " " "
LakeWashington
ElliotBay
§̈5
§̈90
§̈5
To Universityof Washington
S E A T T L E
To Sea-TacAirport
A1
International District/Chinatown Station
S E A T T L E
6TH AV
E S
15TH A
VE S
3RD AVE
M L KIN
G JR W
AY S
23RD A
VE S
1ST AVE
E YESLER WAY
9TH AVE
YESLER WAY
S JACKSON ST
1ST AV
E S
M L KIN
G JR W
AY
S LANDER ST
5TH AV
E S
S MC CLELLAN ST
S SPOKANE ST
S HOLGATE ST
WESTERN AVE
12TH A
VE S
12TH A
VE
ALASKA
N WAY
S
S FOREST ST
2ND AV
E S
GOLF DR S
Qtf
Qvt
Qvt
Qvrl
Qvi
QvtQvt
Qva
Qva
Qva
Qpog
QvlcQpogf
Qvt
Qvr
Qvr
Qpoc
Qvlc
Qvi
QvrQpof
Qpof
Qpdf
Qb
Qvt
Qva
Qvrc
Qva
QpofQvrl
Qva
Qp
Qpogd
Qpon
Qob
Qpon
Qvr
Qva
Qpogd
Qpoc
Qva
Qi
Qvr
Qva
Qpoc
Qvr
Qal
QalQva
Qp
Qi
Qpof
Qvr
Qpog
Qpogt
Qpoc
Qp
Qva
Qvt
Qvr
Qb
Qpoc
Qva
Qpon
Qva
Qpogt
Qpogt Qva
0 0.25 Miles§Exhibit F4.11-1Surficial GeologySegment A, SeattleEast Link Project
At-Grade RouteElevated Route
! ! ! ! Retained-Cut RouteTunnel Route
" " " " " " "
" " " " " " " Mass Wastage Deposit" " " " "
" " " " " Landslide DepositsModified LandArtificial Fill
Landfill DebrisFilled River ChannelsGraded LandRegraded Land
"
Traction Power Substationú Proposed Station!!
Central Link Alignment and Station
Source: Data digitized from GeomapNW at the University of Washington (2007); Sound Transit (2007) and King County (2006).
Segment A
-
")
")
")
!!
!!
!!!
!!
!!
!!
!!
!!
!
!!!
!!
!!!
!!
!!
!!
!!
!!
!
"
" ""
"
"
"""""
LakeWashington
Segment BSegment A
§̈90
A1
Mercer IslandPark & Ride
Mercer Is United Methodist ChurchPark & Ride
Mercer Island Presbyterian ChurchPark & RideM E R C E RI S L A N D
72ND A
VE SE
SE 36TH ST
SE 40TH ST
ISLAND CREST WAY
50TH A
VE S
77TH A
VE SE
80TH A
VE SE
SE 27TH ST
Qvt
Qvt Qva
Qvrl
Qvrl
QvrQvt
Qpfn
Qvr
Qpogf
Qvt
Qpogf
Ql
Qvt
Qva
Qpon
Qva
Qvt
Qvr
Qpon
Qvt
QpofQpon
Qvrl Qvrl
Qvt
Ql
Ql
Qpon
Qpfn
Ql
Qpogt
Qpoc
Qvlc
Qpof
Qva
Qpogd Qvlc
Qponf
QpofQpoc
Qpon Qw
QpofQpof
Qvlc
QvrlQpof
Qvr
Qvlc
Qpogt
Qpogt
Qvlc
Qpon
Qpoc
Qpof
Qp
Qvr
Qva Qvrl
QvrlQw
Qva
Qpfn
Qvr
Qva
Qpoc
Qva
Qob
QwQpogt
Qal
Qw
Qvr
Qva
QpofQpogt
Qpogt
Qpovt
Qvt
Qvrl
Qpogf
Qponf
Qvi
Qal
Qal
Qva
Qvt
Qpon
Qp
QvrQal
Qpof
Qpogf
Qw
Ql
Qal
Qpoc
Qal
Qpogt
QponQpof
QalQp
Ql
Ql
0 0.25 Miles§Exhibit F4.11-2Surficial GeologySegment A - Mercer IslandEast Link Project
" Traction Power Substationú Proposed StationCity Limits
Source: Data digitized from GeomapNW at the University of Washington (2007); King County (2006).
Preferred AlternativeAt-Grade RouteElevated Route
! ! ! ! Retained-Cut Route! ! ! ! Retained-Fill Route
Tunnel RouteOther AlternativeAt-Grade RouteElevated Route
! ! ! !
Retained-Cut or Retained-Fill RouteTunnel Route
-
Â
Â
")
")
Â
Â
Â
!!
!!
!!
!!
!!
!
! !
!!
!!
!
!!
!
!!
!!
!!
!!!!!!!! !!!!!
!
!!!
!!
!!
!!
!!
!!
!!
!!
!
!
!!!
!!
!!
!!
!!
!!
!!
!
!
!
!!!!!!!!!!
!
!!!!!!!!!!!!
!!
!!
!
! ! !
!!
!!
!
! ! !
!!
!!
!
! ! !
!!
!!
!
!!!
! ! !
!!
!!
!
WilburtonPark & Ride
LakeBellevue
Segment Segment
Segment Segment
Segment Segment
SouthBellevue Park & Ride
ProposedPark & Ride
ProposedPark & Ride
Grace LutheranChurchPark & Ride
Sturtev
ant
Creek
Sturtevant Creek
Kelsey Creek
Mercer
Slough
East
Mercer S
lough W
est
Kelsey C
reek
Lake Washington
Mercer Slough East
§̈90
§̈405
§̈90
§̈405
Qvt
Qva
Qva
m
Qva
Qva
QyalQvt
Qva
Qw
Qpf
Qvt
Qva
Qvt
Qvt
Qpf
Qvt
Qva Qvt
Qvr
Qvrl Qvrl
Qvr
Qvr
Qvr
ú Proposed StationCity LimitsRailroad 0 0.25 Miles§
Source: Data from City of Bellevue (2005) and King County (2006).Exhibit F4.11-3Surficial GeologySegment B/CEast Link Project
Preferred AlternativeAt-Grade RouteElevated Route
! ! ! ! Retained-Cut Route! ! ! ! Retained-Fill Route
Tunnel RouteOther AlternativeAt-Grade RouteElevated Route
! ! ! !
Retained-Cut or Retained-Fill RouteTunnel Route
-
")
")
")
Â
ÂÂ
Â
")
Â
Â
ÂÂ
!
!
!!!!
!!
!!
!
!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!
!!
!!
!!
!!
!!
!
! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
! ! ! ! ! !
!
!!
!!
!!
!!
!!
!
!!
!!
!!
!!
!!
!!
!
! ! ! !
!!
!!
!!
!!
!!
!
! ! ! ! ! ! ! ! ! ! ! !
!!
!!
!
!!
!!
! ! ! ! ! !
!
!!
!!
!!
!!
!!
!
!!! !!!
!!
!!
!!
!
!!
!!
!
!!
!!
!!
!!
!
!!
!!!
!
!!!!
!
!!!!
!!
!!
!!
!!
!!
!!
!!!
!!
!!
!!
!!!
!
!!!!!!!
!
!!!
!!
!!
!!
!!
!!
!!
!
! !
!!
!
! !
!!
!
! !
!!
!
!!
! !
!!
!
!!
LakeSammamish
§̈405
¾À202
¾À520
¾À908
M erce
r Slough W
est
Segment
ProposedPark & Ride
OverlakeTransitCenter
ProposedPark & Ride
OverlakePark & Ride
Bellevue ChristianReformed ChurchPark & Ride
RedmondPark & RideBearCreekPark & Ride
Sturtevant Creek
Kelsey Creek
Merc e
r Slou
gh Eas
t
LakeSammamish
Lake Sammamish
QvrQvr
Qvr
Qvrl Qvr
Qvr
Qvr
Qvr Qvr
QyalQob
Qob
QpfQva
Qob
Qpf QvaQvt
QvtQva
m
Qva
QpfQvt
Qpf
Qoal
Qva QpfQva Qpf
Qva
Qvt
Qpf
QobQvtQva
Qva
QpfQls
Qoal
QvaQls
Qva
QvaQyal
QfQva
Qva
Qoal
Qva
Qva
Qtu
Qpf
Qpf
Qvt
Qvt
Qyal
Segment Segment
Segment Segment
ú Proposed StationMaintenance FacilityCity Limits 0 0.5 Miles§
Source: Data from City of Bellevue (2005) and King County (2006).Exhibit F4.11-4Suficial GeologySegment D/EEast Link Project
Preferred AlternativeAt-Grade RouteElevated Route
! ! ! ! Retained-Cut Route! ! ! ! Retained-Fill Route
Tunnel RouteOther AlternativeAt-Grade RouteElevated Route
! ! ! !
Retained-Cut or Retained-Fill RouteTunnel Route
-
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!!
!
!
!
!!
!
!!
!!
!
! !!!!! !!!
!
!!
!!
!!
!!
!!
!
!
!!!
!!
!!
!!
!
!
!
!!!!!!!
! !! !! !
!!
!
!!
! !
LakeWa sh in g ton
ElliotBay
LakeUnion
§̈5
§̈90
§̈405
§̈5¾À99
Segment B
§̈405
Segment A
To Sea-TacAirport
To Universityof Washington
Segment A
Segment
Segment CSegment B
NE 6TH
S E A T T L E
M E R C E RI S L A N D
B E L L E V U E
0 1 Miles §Exhibit F4.11-5 Geologic Hazard Areas Segment AEast Link Project
Liquefaction Hazard Area(City of Seattle)Landslide Hazard Area(City of Seattle)Steep Slope Greater than 40%(City of Seattle & King County)
Peat Settlement Prone Area (City of Seattle) ú Proposed Station!!
Central LinkAlignment and StationCity Limits
Source: Data from City of Seattle (2003), City of Bellevue (2003), King County (2006), and Sound Transit (2007).Low to Moderate Liquefaction Hazard (Bellevue & Mercer Island)Moderate to High Liquefaction Hazard (Bellevue & Mercer Island)Peat (Bellevue & Mercer Island)
Preferred AlternativeAt-Grade RouteElevated Route
! ! ! ! Retained-Cut Route! ! ! ! Retained-Fill Route
Tunnel RouteOther AlternativeAt-Grade RouteElevated Route
! ! ! !
Retained-Cut or Retained-Fill RouteTunnel Route
-
!!
!!
!
!
!
!!
!!
!!
!
!!
!
!!
!!
!!
!!
!!
!!
!
!!
!!
!!
!!
!!
!! !
!!
!!
!!
!
!!
!!
!!
!!
!!
!!
!
! ! ! ! ! ! ! ! ! ! ! ! !
!!
!!
!!
!!
!!
!!
!
!!
!! ! ! ! !
!
!!
!!
!!
!!
!
!!
!!
!!
!!
!!
!
! ! !
!!
!!
!!
!!
!
! ! ! ! ! ! ! ! ! !
!!
!!
!!
!! ! ! ! !
!
!!
!!
!!
!!
!
!! !!
!!
!!
!
!!
!
!
!!
!!
!!
!
!!
!!!
!!
!
!
!!
!!
!
!!!
!!!
!!
!
!
!
!!!!
!
!!
!!
!!
!!
!!
!
!!
!!
!
!!
!
!!
!
!!!!!
!
!!!
!!
!!
!!
!!
!!
!
! !
!!
!
! !
!!
!
! !
!!
!!
!
!!
!
!
LakeSammamish
§̈405
¾À202
§̈90
¾À520
¾À908
§̈405
Segment E LakeSammamish
B E L L E V U E
R E D M O N D
Segment A Segment B
Segment B Segment C
Segme
nt C Seg
ment D
Segment D
Exhibit F4.11-6 Geologic Hazard AreasSegment B/C/D/EEast Link Project
Low to Moderate Liquefaction HazardModerate to High Liquefaction HazardPeat
Landslide Hazard Area(City of Redmond)Landslide Hazard Area(King County)Steep Slope Greater than 40%(City of Bellevue & King County)
ú Proposed StationCity Limits
0 0.5 Mile §Source: Data from City of Bellevue (2003), City of Redmond (2007), and King County (2003 and 2006).
Preferred AlternativeAt-Grade RouteElevated Route
! ! ! ! Retained-Cut Route! ! ! ! Retained-Fill Route
Tunnel RouteOther AlternativeAt-Grade RouteElevated Route
! ! ! !
Retained-Cut or Retained-Fill RouteTunnel Route
-
!!
!!
!!
!!
!!
!!!!
!!
!!
!!
!!
!!
!(!(
!(
!(
!(
!(!(
!(
!(
!(!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(!( !(!(!(
!(
!(
!(
!(
!(
!(!(
!(
!(
!(!(
!(!(
!(!(
!(
!(
!(
!(
!(
!(
!(!(
!(!(
!(
!(
!(
!(!(
!(
!(
!(
!(!(
!(
!(
!(!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(!(
!(
!(
!(
!(
!(
!(
!(
!(
!(!(!(
!(
!(!(
!(
!(!(
!(!(
!(
!(!(
!(!(
!(
!(
!(
!(!(!(!(!(!(!(
!(
!(!(!(
!(
!(
!(
!(!(
!(!(!(!(!(
!(!(!(
!(!(
!( !(
!(!(
!(
!(
!(
!(!(
!(!(
!(!(
!(
!(!(!(
!(!(
!(!(!(!(!(!(!(
!(!(
!(!(
!(!(
!(
!(
!(!(!(!(
!(
!(
!(
!(!(
!(
!(!(
!(
!(!(!(!(!( !(!( !(!(!(!(!(!(
!(!(!(!( !(!(
!(!(!(!(!(!(!(
!(!(!(!(!(!(!(
!(
!(!(!(!(
!(!(!(!(!(!(!(!(!(
!(
!(!(
!(!(!(!(!(!(!(!(!( !( !( !(
!(!(!( !(!(!(!(
!(!(!(
!( !(!(
!(!(!(!(!(!(!(!(
L a k eW a s h i n g t o n L a k eS a m m a m i s hElliotBay
L a k eU n i o n
¾À520
§̈405
¾À99
¾À520
SegmentTo Sea-TacAirport
University ofWashington
Segment DSegment C
§̈5
§̈90
§̈5
§̈405§̈90
§̈405
Segment A
ASegment B
Segment CSegment B
Segment ESegment D
¾À202
¾À202
¾À908
NE 6THS E A T T L E
M E R C E RI S L A N D
B E L L E V U E
R E D M O N D
0 1 Mile§Exhibit F4.11-7Existing Soil BoringsSegments A,B,C,D, and EEast Link Project!(
Existing Soil Boring Within the Alternative and Maintenance Facility Right-of-WayEast Link Proposed Alternative
!! Central Link Alignment and Station
Source: Data from GeoMapNW at the University of Washington (2007), Sound Transit (2007), and King County (2006).
Geologic Unit Summaries, Hazard Areas, and Boring LocationsTABLE F4.11-1 Summary of Geologic Units and their Engineering Properties
/ColorImageDict > /JPEG2000ColorACSImageDict > /JPEG2000ColorImageDict > /AntiAliasGrayImages false /CropGrayImages true /GrayImageMinResolution 300 /GrayImageMinResolutionPolicy /OK /DownsampleGrayImages true /GrayImageDownsampleType /Bicubic /GrayImageResolution 300 /GrayImageDepth -1 /GrayImageMinDownsampleDepth 2 /GrayImageDownsampleThreshold 1.50000 /EncodeGrayImages true /GrayImageFilter /DCTEncode /AutoFilterGrayImages true /GrayImageAutoFilterStrategy /JPEG /GrayACSImageDict > /GrayImageDict > /JPEG2000GrayACSImageDict > /JPEG2000GrayImageDict > /AntiAliasMonoImages false /CropMonoImages true /MonoImageMinResolution 1200 /MonoImageMinResolutionPolicy /OK /DownsampleMonoImages true /MonoImageDownsampleType /Bicubic /MonoImageResolution 1200 /MonoImageDepth -1 /MonoImageDownsampleThreshold 1.50000 /EncodeMonoImages true /MonoImageFilter /CCITTFaxEncode /MonoImageDict > /AllowPSXObjects false /CheckCompliance [ /None ] /PDFX1aCheck false /PDFX3Check false /PDFXCompliantPDFOnly false /PDFXNoTrimBoxError true /PDFXTrimBoxToMediaBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXSetBleedBoxToMediaBox true /PDFXBleedBoxToTrimBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXOutputIntentProfile () /PDFXOutputConditionIdentifier () /PDFXOutputCondition () /PDFXRegistryName () /PDFXTrapped /False
/CreateJDFFile false /Description > /Namespace [ (Adobe) (Common) (1.0) ] /OtherNamespaces [ > /FormElements false /GenerateStructure false /IncludeBookmarks false /IncludeHyperlinks false /IncludeInteractive false /IncludeLayers false /IncludeProfiles false /MultimediaHandling /UseObjectSettings /Namespace [ (Adobe) (CreativeSuite) (2.0) ] /PDFXOutputIntentProfileSelector /DocumentCMYK /PreserveEditing true /UntaggedCMYKHandling /LeaveUntagged /UntaggedRGBHandling /UseDocumentProfile /UseDocumentBleed false >> ]>> setdistillerparams> setpagedevice