Base Map Source: GoogleEarth, 12/3/2011. 2 0 1 Scale in Miles ½ PROJECT SITE 14 138 N Angeles National Forest Boundary Regional Project Location and Sediment Removal Truck Routes Figure B-1 LITTLEROCK RESERVOIR SEDIMENT REMOVAL PROJECT PROJECT SITE 14 Sediment Removal Truck Route Existing Quarries Existing Quarries Palmdale Water District Property Project Site Palmdale Water District Property C h e s e bo r o R d Barrel Springs Rd 47th St Avenue T C h e s e bo r o R d Avenue T Barrel Springs Rd 47th St February 2017
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Base Map Source: GoogleEarth, 12/3/2011.
20 1
Scale in Miles
½
PROJECT SITE
14
138
N
Angeles National Forest Boundary
Regional Project Location and Sediment Removal Truck Routes Figure B-1
LITTLEROCK RESERVOIRSEDIMENT REMOVAL PROJECT
PROJECT SITE14
LOS ANGELES CO.
KERN CO.
Sediment Removal Truck Route
Existing Quarries
Existing Quarries
Palmdale Water District Property
Project Site
Palmdale Water District Property
Chese
boro
Rd
Barrel Springs Rd
47th
St
Avenue T
Chese
boro
Rd
Avenue T
Barrel Springs Rd
47th
St
February 2017
N 1,0000 500
Scale in Feet
Existing Paved Parking Areas
Grade Control Structure
Sediment Removal Disturbance Area
Littlerock Reservoir Project Overview Areas
Figure B-2
LITTLEROCK RESERVOIRSEDIMENT REMOVAL PROJECT
Lot F (Sage Picnic Area)
Rocky Point Picnic Area
Boat Launch Ramp
Existin
g R
oadw
ay
Existing Vehicle Access Point
Base Map Source: GoogleEarth, 12/3/2011.
Existing Roadway
Rocky PointEntrance Grade
Note that Reservoir water level is lowered in this photograph.
February 2017
Surface
Subsurface
Grade Control Structure Side ProfileFigure B-3
LITTLEROCK RESERVOIRSEDIMENT REMOVAL PROJECT
February 2017
Note: a portion of the grade control banks outside the “channel bottom limits post construction” will be visible after construction, as will the grade control crest at cross section A-A. All other parts of the structure will be below ground. The flow control berm is temporary.
N
Scale in Feet
0 10050
Grade Control Structure Concept Plan ViewFigure B-4
LITTLEROCK RESERVOIRSEDIMENT REMOVAL PROJECT
February 2017
Grade Control Invert
Grade Control Banks
Excavation Outside Structure Limits
Flow Control Berm
Fill
Approximate Construction Limits
Section Location Lines
Channel Bottom Limits Post Construction
NOTE: Simulated soil cement embankment would be located on both sides of the Reservoir channel and extend approximately 20-feet further downstream (off the photograph) before ending.
Grade Control Structure Surface Visual Simulation Figure B-5
LITTLEROCK RESERVOIRSEDIMENT REMOVAL PROJECT
February 2017
Base Map Source: GoogleEarth, 12/3/2011.
20 1
Scale in Miles
½
PROJECT SITE
14
138
N
Angeles National Forest Boundary
Regional Project Location and Sediment Removal Truck Routes
Figure C.3-1
LITTLEROCK RESERVOIRSEDIMENT REMOVAL PROJECT
February 2017
PROJECT SITE14
LOS ANGELES CO.
KERN CO.
Sediment Removal Truck Route
Existing Quarries
Existing Quarries
Palmdale Water District Property
Project Site
Palmdale Water District Property
Chese
boro
Rd
Barrel Springs Rd
47th
St
Avenue T
Chese
boro
Rd
Avenue T
Barrel Springs Rd
47th
St
BB
PP AA nn dd LL RR dd
Cheseb
oro Rd
B P And L Rd
Pearblossom Hwy
E Avenue T
Old Fort Tejon Rd47
Th St
EE Barrel Springs Rd
Pearblossom Hwy
Mount Emma Rd
ST138
City ofPalmdale
City ofPalmdale
City ofLittlerock
February 2017
I
Figure C.3-2
Littlerock ReservoirSediment Removal Project
0 0.5 1Miles
Project Areaand
Survey Areas
Sediment Removal Truck Route California Aqueduct
Sediment RemovalProject AreaVegetation Study Area
Study AreaExisting Quarries47th Street SedimentDisposal SiteCity BoundaryAngeles National Forest
February 2017
LITTLEROCK RESERVOIR SEDIMENT REMOVAL PROJECT
I
Sediment Removal Haul RouteSediment Removal AreaDavis-Grunsky Area
Special-status Birds Observed_̂ Least bell's vireo
_̂ Rufous-crowned sparrow
_̂ Summer tanagerOccupied Least Bell's vireo habitat
Figure C.3-11b
Littlerock ReservoirSediment Removal Project
0 750 1,500Feet
* High-resolution imagery was acquiredwith anunmanned aerial vehicle August 2013 (Airphrame).Other background imagery courtesy of Bing 2012.
Special-Status AnimalsSurvey Results
Rocky Point
Littlerock Dam
February 2017
Grade Control Structure ElementsApproximate constructionlimitsExcavation outside of structurelimitsFillFlow control bermGrade control banksGrade control banks - AbovegroundGrade control invertGrade control invert - Aboveground
Sediment Removal Truck RouteDisturbance AreaPalmdale Water District PropertyCity BoundaryFederal Jurisdictional Drainage (0 ac. in disturbance area)State Jurisdictional Drainage (0 ac. in disturbance area)
Figure C.3-12b
Littlerock ReservoirSediment Removal Project
0 225 450Feet
47th Street Sediment Storage Site Potentially Jurisdictional Drainages
California Aqueduct
Littlerock Dam
Rocky Point
February 2017
LITTLEROCK RESERVOIR SEDIMENT REMOVAL PROJECT
I
Sediment Removal Haul RouteSediment Removal AreaDavis-Grunsky Area
Figure C.3-13
Littlerock ReservoirSediment Removal Project
0 500 1,000Feet* High-resolution imagery was acquiredwith anunmanned aerial vehicle August 2013 (Airphrame).Other background imagery courtesy of Bing 2012.
Littlerock ReservoirSediment Removal Area
February 2017
Grade_Control_ShapesApproximate constructionlimitsExcavation outside ofstructure limitsFillFlow control bermGrade control banksGrade control banks - AbovegroundGrade control invertGrade control invert - Aboveground
Figure C.3-14
Littlerock ReservoirSediment Removal Project
0 75 150Feet * High-resolution imagery was acquiredwith anunmanned aerial vehicle August 2013 (Airphrame).
Rocky PointGrade Control Structure
Palmdale
47Th
St E
47Th
St E
43Rd St E43Rd St E
EE AA VV EE TT 88
February 2017
Sediment Removal Truck RouteDisturbance AreaPalmdale Water District PropertyCity Boundary
Figure C.3-15
Littlerock ReservoirSediment Removal Project
0 225 450Feet
47th Street Sediment Storage Site Disturbance Area
California Aqueduct
February 2017
LITTLEROCK RESERVOIR SEDIMENT REMOVAL PROJECT
I
Aspen Study AreaAspen Survey Results
Toads calling, 2011Toads found, 2010 surveyArroyo Toads found by Ramirez, 2001Sediment Removal AreaSediment Removal Haul RouteSediment Removal AreaGrade Control StructureLittle Rock Creek