PROJECT SITE - a123.g.akamai.neta123.g.akamai.net/7/123/11558/abc123/forestservic... · Angeles National Forest Boundary Regional Project Location and Sediment Removal Truck Routes

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


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


Lot F (Sage Picnic Area)

Rocky Point Picnic Area

Boat Launch Ramp

Existin

g R

oadw

ay

Existing Vehicle Access Point


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


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


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


February 2017


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


February 2017

PROJECT SITE14

LOS ANGELES CO.

KERN CO.

Sediment Removal Truck Route

Existing Quarries

Existing Quarries


Project Site


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

Cover TypeArroyo willow thicketsBig sagebrush scrubBlack willow scrubCalifornia buckwheat scrubCalifornia juniper woodlandDevelopedFremont cottonwood forestHerbaceous wetlandMormon tea scrubOpen waterSandy washSingleleaf pinyon woodlandUnvegetated lake bottom

Figure C.3-3


0 500 1,000Feet

* High-resolution imagery was acquiredwith anunmanned aerial vehicle August 2013 (Airphrame).Other background imagery courtesy of Bing 2012.

Littlerock Reservoir Vegetation

Palmdale

PalmdaleLittlerock

138

February 2017

Haul RouteProjectExisting QuarriesPWD PropertyAngeles National Forest BoundaryCity Boundary

Cover TypeArroyo willow thicketsBig sagebrush scrubCalifornia buckwheat scrubCalifornia juniper woodlandCattail marshesCreosote bush scrubDevelopedFremont cottonwood forestJoshua tree woodlandMormon tea scrubNon-native woodlandRubber rabbitbrush scrubRuderalSandy wash

Figure C.3-4


0 0.25 0.5Miles

Proposed Haul RouteVegetation

Littlerock Dam

Recreation AreaEntrance Gate

Littlerock Reservoir

California Aqueduct

Cheseboro RoadBarrel Springs Rd

47th St. E

Pearblossom Hwy E. Ave. T

Palmdale

47Th

St E

47Th

St E

43Rd St E43Rd St E

EE AA VV EE TT 88

February 2017

Disturbance AreaSediment Removal Truck Route (Primary)Palmdale Water District PropertyCity Boundary

Cover TypeDisturbed (2.3 ac within disturbance area)Juniper Woodland (5.4 ac within disturbance area)

Figure C.3-5


0 225 450Feet

47th Street Sediment Storage Site Vegetation

California Aqueduct

February 2017


IFigure C.3-6


0 0.25 0.5Miles

Arroyo ToadCritical Habitat

Little Rock CreekArroyo Toad Critical Habitat

Sediment Removal AreaGrade Control StructureDavis-Grunsky Area

Sediment Removal Haul Route

!?!?!?

!?!?

!?!?!?!?!?!?!?!?

!?

!?!?!?

!?!?!?

!?!?!?!?!?!?

!?!?

!?!?!?!?!?!?!?!?!?

!?

!?!?!?!?!?!?

February 2017


I

!? Dead or Cut-Down Cottonwood TreeSediment Removal Haul RouteSediment Removal AreaProject AreaDavis-Grunsky Area

Figure C.3-7


0 500 1,000Feet


Dead or RemovedCottonwood Tree Locations

February 2017

Figure C.3-8

Littlerock ReservoirSediment Removal ProjectProject Area and Haul Route

CChheesseebboorroo RRdd

Palmdale

138

E AVE T E AVE T

E AVE T8 E AVE T8

56Th

St E

56Th

St E

Ches

ebor

o Rd

Ch

eseb

oro

Rd

EE AA VV EE TT 2260Th

St E

60Th

St E

62Nd

St E

62Nd

St E

E AVE T4 E AVE T4

EE AAVVEE TT 55

LL oocc kk

hh aarr tt

AA vv ee

Pearblossom Hwy

Pearblossom Hwy

Pearblossom Hwy

Pearblossom Hwy

E AVE T4 E AVE T4

Palmdale

Palmdale Littlerock

138

E AVE T E AVE T Pearb lossom Hw y Pearb lossom Hw y

Ches

ebor

o Rd

Ch

eseb

oro

Rd

47Th

St E

47Th

St E

E AVE T8 E AVE T8

MM oo uu nn tt EE mm mm aa RR dd

BB PP AA nn dd LL RR dd40

Th S

t E40

Th S

t E

70Th

St E

70Th

St E

42Nd

St E

42Nd

St E

52Nd

St E

52Nd

St E

LL ii tt tt ll ee RR oo cc kk WW aa ss hh RR dd

55Th

St E

55Th

St E

BB aa rr rree ll SSpp rr ii nnggss RRdd

53Rd

St E

53Rd

St E

E AVE T4 E AVE T4

EE BBaarr rree ll SSpp rriinnggss RRdd

56Th

St E

56Th

St E

Bpl RdBpl Rd

EE AA VV EE VV 55

EE AA VV EE TT 22

41St

St E

41St

St E

48Th

St E

48Th

St E

Project Area OverviewHaul Route Detail 1 Reservoir Detail

Reservoir Detail

CChheesseebboorroo RRdd

Haul Route Detail 2

Haul Route Detail 1

Haul Route Detail 2

1:3,000

1:8,0001:40,000

1:10,000

1:10,000

Sediment Removal Truck Route (Primary)Existing QuarriesLittlerock Reservoir

Palmdale Water District PropertyCity BoundaryAngeles National Forest Boundary

Documented Weed OccurrencesWeeds: Individuals

TocaloteShort-pod mustardTree tobaccoJerusalem thorn

Russian thistleWhite horsenettleSmilo grassWand mullein

PatchesRabbitsfoot grassTamariskWand mullein

Weeds

February 2017

Figure C.3-9


0 500 1,000Feet

47th Street Sediment Storage Site DRECP Modelled Habitat

Palmdale

47Th

St E

47Th

St E

48Th

St E

48Th

St E

EE AA VV EE TT 88

4433RRddSStt EE

Palmdale

47Th

St E

47Th

St E

48Th

St E

48Th

St E

EE AA VV EE TT 88

4433RRddSStt EE

Palmdale

47Th

St E

47Th

St E

48Th

St E

48Th

St E

EE AA VV EE TT 88

4433RRddSStt EE

Burrowing OwlDesert Tortoise

Mohave Ground Squirrel LegendSediment Removal Truck Route (Primary)City BoundaryPalmdale Water District Property

Species-Specific DRECP-Maxent Habitat Suitability Model Value0 - 0.20.2 - 0.40.4 - 0.60.6 - 0.80.8 - 1.0

February 2017


Figure C.3-10a

LITTLEROCK RESERVOIRSEDIMENT REMOVAL PROJECTSpecial-Status Plant Species

CNDDB

Source: USFWS CNDDB February 2016

0 1.5 3Miles

I

Sediment Removal HaulRouteLittlerock ReservoirSediment Disposal SitesAngeles National Forest

CNDDB-recordedOccurrence

Sagebrush loeflingiaShort-joint beavertailWhite pygmy-poppy

!(

!(

!(

!(

February 2017


I

Sediment Removal Haul RouteSediment Removal AreaProject AreaDavis-Grunsky Area

Sensitive Plants!( Johnston's monkeyflower!( Short-joint beavertail!( Lemmon's syntrichopappus

Figure C.3-10b


0 500 1,000Feet


Special-Status PlantsSurvey Results

February 2017

Figure C.3-11a

LITTLEROCK RESERVOIRSEDIMENT REMOVAL PROJECTSpecial-Status Animal Species

CNDDB

Source: USFWS CNDDB April 2016

0 1.5 3Miles

I

Sediment Removal HaulRouteLittlerock ReservoirSediment Disposal SitesAngeles National Forest

CNDDB-recorded OccurrenceArroyo toadBurrowing owlCalifornia legless lizardCalifornia red-legged frogCoast horned lizardCrotch bumble beeLe Conte's thrasherLeast Bell's vireoLoggerhead shrikeMohave ground squirrelRosy boaSan Joaquin PocketMouseSwainson's hawkSouthern mountain yellow-legged frogTricolored blackbirdTwo-striped garter snakeYuma myotis

Crotch bumble beecoast hornedlizard

Crotch bumble bee

Crotch bumble beeLe Conte's thrasher

Le Conte's thrasher

Mohaveground squirrel


tricoloredblackbird


two-stripedgarter snake

southern mountainyellow-legged frog

arroyo toad

coast hornedlizard

coast horned lizard

coast horned lizard

Crotch bumble bee


arroyo toad

Yuma myotis

two-stripedgarter snake

loggerhead shrike

Californialegless lizard




rosy boa

California red-legged frog

burrowing owl

coast horned lizard





least Bell'svireo

!(

!(

!(

!(

!(

!(

!(

_̂

_̂

_̂

_̂

_̂

_̂

February 2017


I

Sediment Removal Haul RouteSediment Removal AreaProject AreaDavis-Grunsky Area

Special-status Reptiles Observed!( California legless lizard!( Coast horned lizard!( Patch-nosed snake!( Southwestern pond turtle!( Two-striped garter snake

Special-status Birds Observed_̂ Least bell's vireo

_̂ Rufous-crowned sparrow

_̂ Summer tanagerOccupied Least Bell's vireo habitat

Figure C.3-11b


0 750 1,500Feet


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

Haul RouteSediment Removal AreaProject AreaPaved Parking and StagingAreasFederal Waters (Reservoir:91.9 ac; Below Dam: 0.006 ac)

State Waters (Reservoir: 96.4ac; Below Dam: 0.028 ac)

Figure C.3-12a


0 500 1,000Feet

PotentiallyJurisdictional Featuresin Littlerock Reservoir

Detail: Below Dam Road Maintenance Area

Detail: Grade 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 BoundaryFederal Jurisdictional Drainage (0 ac. in disturbance area)State Jurisdictional Drainage (0 ac. in disturbance area)

Figure C.3-12b


0 225 450Feet

47th Street Sediment Storage Site Potentially Jurisdictional Drainages

California Aqueduct

Littlerock Dam

Rocky Point

February 2017


I

Sediment Removal Haul RouteSediment Removal AreaDavis-Grunsky Area

Figure C.3-13


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


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


0 225 450Feet

47th Street Sediment Storage Site Disturbance Area

California Aqueduct

February 2017


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

Figure C.3-16


0 0.25 0.5Miles

Arroyo Toad Survey Results

Documents

PROJECT SITE - a123.g.akamai.neta123.g.akamai.net/7/123/11558/abc123/forestservic... · Angeles National Forest Boundary Regional Project Location and Sediment Removal Truck Routes