Preliminary_ida-fs-sc-multi1_Plan.pdf

PDF 21 MB Posted

Attached to
ID FLAP FS SC MULTI(1), Custer Motorway Stabilization Project Federal contract opportunity
Solicitation number
69056725R000008
Issued by
Department of Transportation Federal Highway Administration

About this file

This is a preliminary engineering and construction planning document for the Custer Motorway Stabilization Project located in Custer County, Idaho, within the Salmon-Challis National Forest. The project involves bank stabilization, roadway improvements, and erosion control along Schedules A and B of the Custer Motorway, spanning approximately 0.14 miles across two main sections (MP 24.0 and MP 25.3). Key technical elements include reinforced soil slopes, buried log revetments, temporary stream diversion, silt fence installation, and environmental design features like root wads and fish passage boulders. The project requires bank stabilization with rootwads and reinforced soil slopes, environmental design to minimize ecological impact, and comprehensive erosion control measures using geotextile materials, fiber rolls, and sediment filter bags.

The documentation includes detailed construction plans, typical cross-sections, wall layout tables, temporary traffic control strategies, and road closure layouts. Temporary traffic management will involve road closures, detour signage, and flagging operations. The project will require careful water management, slope protection, and preservation of the existing landscape within the Salmon-Challis National Forest. The U.S. Department of Transportation's Federal Highway Administration is overseeing the project, with construction planned to accommodate water management and minimize environmental disruption. Specific technical specifications cover soil reinforcement, aggregate placement, geotextile installation, and environmental design elements to stabilize the motorway and protect the surrounding ecosystem.

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Prelim Letter_ID FLAP FS SC MULTI(1).pdf PDF
PROJECT DESCRIPTION_ID FLAP FS SC MULTI(1).pdf PDF

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Text version

PRELIMINARY - N

OT FOR

CONSTRUCTION

BH TP

CUYD

culv.

CUFT

cubic yard(s) culvert cubic foot (feet) mon.

min.

MGAL

max.

matl.

M.P.

M.L.

monument minimum thousand gallon maximum material mile post main line

W

RIP

DI

G W G WV

CP GPS

36 31

36 31

N

E

N 1000EL. 1234.56

TP

TP

SEC.

SEC.

θs Ø ∆c spiral central angle diameter curve central angle total central angle approach ahead average daily traffic abutment appr.

AH

ADT

abut.

between bearing bridge balance point bench mark back face back btwn brg.

br.

BP

BM

b.f.

BK

ctrs.

CS

cont.

constr. jt.

conn.

conc.

col.

CMP

clr.

cc or c. to c.

centers point of curve to spiral continuous construction joint connection concrete column corrugated metal pipe clear centerline center to center

NO SCALE

NOTE:

1.

on the appropriate plan sheet.

Other symbols used in the plans will be shown in a legend

W west drwg(s).

dist.

diaph.

dia.

DHV

D exp. jt.

exc.

EW

EQ or eq.

EOP

emb.

elev.

El. 94.16 e.f.

e E expansion joint excavation edge of water equation edge of pavement embankment elevation elevation in feet each face superelevation rate east drawing(s) distance diaphragm diameter design hourly volume diameter galv.

ga.

galvanized gage (gauge) jt.

IE

ID

joint invert elevation inside diameter ftg.

flg.

fin.

f.f.

footing flange finish front face

LW

lt. or LT Ls

LPSM

long.

LNFT

lat.

L low water left length of spiral lump sum longitudinal linear foot (feet) latitude length of curve rte.

rt. or RT reqd.

reinf.

rdwy.

R/W R.

R route right required reinforcement roadway right-of-way range radius typ.

Ts

TS

thd.

TBM

T.

T typical tangent distance (spiraled curve) point of tangent to spiral thread temporary bench mark township tangent distance

VPI

vph V vertical point of intersection vehicles per hour design speed (velocity)

STS

struc.

stiff.

stgr.

std.

STA, Sta.

ST

SS

SRS

SQYD

SQFT

spa.

SLRY

shldr.

sect.

SC

SADT

S point of spiral to tangent spiral structural stiffener stringer standard station point of spiral to tangent point of spiral to spiral (no curve) point of spiral to reverse spiral square yard square foot spacing, spaces or spaced slurry unit shoulder section point of spiral to curve seasonal average daily traffic south

KSI

square inch thousand pounds per pvmt.

PT

PST

PSC

PSI

PSF

PS

POT

POS

POC

pl.

PI

PCS

PCC

PC

pavement point of tangent point of spiral to tangent point of spiral to curve pounds per square inch pounds per square foot point of tangent to spiral point on tangent point on spiral point on curve plate point of intersection point of curve to spiral point of compound curve point of curve

OHWM

OG

OD

o. to o.

o.c.

ordinary high water mark original ground outside diameter out to out on center

NC

N normal crown north

A A

DI

National Boundary

State Boundary

County Boundary

City Boundary

Township or Range Line

Section Line

Section Corner (Found, Projected)

Control Point (Terrestrial and GPS)

Gas & Water Meter; Gas & Water Valve

Flagpole; Fire Hydrant

Cooking Grate; Garbage Can; Picnic Table

Boulder; Well; Antenna; Grave

Above Ground Tank; Underground Tank

Spot Elevation; Coordinate Grid Tick

Material Source; Bore Hole; Test Pit

Treeline; Individual Trees

Spring or Seep

Section Line 4

Section Corner (Found, Projected) 4

Section Line 16

Section Corner (Found, Projected)16

Property Line

Parcel Number

National Park Boundary

National Forest Boundary

National Wildlife Refuge Boundary

BLM Lands Boundary

Indian Reservation Boundary

Existing Roadway (Paved, Gravel)

Railroad

Trail

Fiber Roll

Silt Fence

Sandbag

Intermittent Drainage or Small Creek

Large Creek or River

Lake, Pond or Reservoir; Marshland

North Arrow

Slope Stake Limits Top of Cut

Toe of Fill

Construction Limits

Bottom of Ditch

Fence

Gate with Fence

Cattleguard

Guardrail

Concrete Barrier and Guard Wall

Retaining Wall wall face

Signs (single, double post; portable)

Delineators

Pipe Culvert (arrow shows flow)

Pipe Culvert with End Section

Pipe Culvert with Headwall

Pipe Culvert with Drop Inlet

Box Culvert

Underdrain

Overhead/Above Ground Utilities

Underground Utilities

Light, Support w/Anchor) Poles (Power, Telephone, Joint Use, Miscellaneous Utility Features

Building

Right-of-Way Line

Permanent Easement

Construction Easement

Riprap

- no symbol -

Section A-A

EXISTING PROPOSED

STEAM = steam, T = telephone, TV = CATV, W = water P = power, SA = sanitary sewer, SD = storm drain, SS = storm sewer, FM = force main, FO = fiber optic, G = gas, IRR = irrigation, O = oil, UP = transformer or junction box, WF = water fountain EM = electric meter, TP = telephone pedestal, TV = CATV pedestal,

- no symbol -

ABBREVIATIONS

PLAN SYMBOLS AND

101-1W

FP-14

6/2022

WFLHD DETAIL

:4

P

M

N o v e m b e r

D e t W

-1 c p w

-w o rk \d

\i d a -f s -s c -m u lt i1 a b .d g n

OFFICE OF FEDERAL LANDS HIGHWAY

U.S. DEPARTMENT OF TRANSPORTATION, FHWA

SPECIFICATION

APPROVED FOR USE

PROJECT

NUMBER

SHEET

A.2

ID FLAP FS SC MULTI(1)

STATE PLANE COORDINATES GEO COORDINATES

POINT

NUMBER NORTH EAST ORTHOMETRIC

ELEVATION LATITUDE LONGITUDE ELLIPSOID

HEIGHT

COMBINED

FACTOR DESCRIPTION NOTE:

Site 1 1.

22101 1036812.214 1542493.712 6665.033 44°30'38.930536"N 114°22'31.379547"W 6624.5763 0.999641836 5/8" ir w/fhwa alum cap

22102 1036809.318 1542246.766 6681.328 44°30'38.890724"N 114°22'34.787253"W 6640.875 0.999641112 5/8" ir w/fhwa alum cap

22103 1036986.069 1541973.868 6691.832 44°30'40.623689"N 114°22'38.564545"W 6651.3781 0.999640672 spike

22104 1037204.182 1541532.616 6703.768 44°30'42.757358"N 114°22'44.667894"W 6663.3143 0.999640201 spike

22105 1037146.150 1541176.096 6718.574 44°30'42.167941"N 114°22'49.584279"W 6678.1264 0.999639575 5/8" ir w/fhwa alum cap

22106 1037006.834 1541008.364 6729.845 44°30'40.784500"N 114°22'51.890074"W 6689.4031 0.999639074 5/8" ir w/fhwa alum cap

Site 2

22200 1033657.107 1537801.730 6926.967 44°30'07.556430"N 114°23'35.919943"W 6886.626 0.999630394 5/8" ir w/fhwa alum cap

22201 1033559.442 1537696.035 6937.190 44°30'06.586978"N 114°23'37.371837"W 6896.8514 0.999629931 5/8" ir w/fhwa alum cap

22202 1033391.906 1537409.787 6949.065 44°30'04.918951"N 114°23'41.310319"W 6908.7301 0.999629431 5/8" ir w/fhwa alum cap

22203 1033177.548 1537025.151 6961.153 44°30'02.783817"N 114°23'46.603142"W 6920.8227 0.999628944 5/8" ir w/fhwa alum cap

22204 1033041.287 1536698.887 6951.541 44°30'01.422617"N 114°23'51.095704"W 6911.213 0.99962948 5/8" ir w/fhwa alum cap

COORDINATE SYSTEM : Idaho Central SPCS NAD83 2011 VERTICAL DATUM : Orthometric elevations based on the NAVD88 GEOID18

EPOCH DATE : 2010.000

CADD SYSTEM COORDINATE SYSTEM : ID83/2011-CF NSRS11(NAD83/2011) Idaho, Central Zone, US Foot

PROJECT : Custer Motorway Stabilization Project DATE OF FIELD WORK : August 2022

PROJECT UNITS : US SURVEY FOOT

-M ar -2

1:

P M c:

\p w

-w or k\ d0 cu st er _m ot or w ay

_c on tr ol sh ee t.

xl sx ]S he et

To precisely check distances between points as measured on the ground, inverse the state plane coordinates and divide the computed distance by a mean combined factor of the two points.

PROJECT

D.1ID FLAP FS SC MULTI(1)

SHEET

NUMBER

SURVEY CONTROL

PRELIMINARY - N

:4

O c to b e r

W a ll

T a b u la ti o n

S h e e t] p w w o r k \d

\i d a f s s c m u lt i1 g a a .d g n

WALL LAYOUT TABLES

PROJECT

G.4

CUSTE

R M

OTORWAY

Challis Creek Road

M4-9R

M4-9R

M4-9L

M4-9L

M4-9L

M4-9R

W16-8P

W16-8P

W16-8P

W16-8P

W16-8P

W16-8P

W16-8P

W20-3

W20-2

M4-8a

M4-8a

M4-10R

M4-10L

R11-3a

R11-3a

Barricade, Type 3

Barricade, Type 3

N

Custer, ID

±14 miles to

RESERVIOR CAMPGROUND

MOSQUITO FLAT

CAMPGROUND

MILL CREEK

Roadway closure

Scale in miles

DETOUR

DETOUR

AHEAD

DETOUR

CLOSED

ROAD

AHEAD

END

DETOUR

LOCAL TRAFFIC ONLY

ROAD CLOSED

4 MILES AHEAD

DETOUR

DETOUR

DETOUR

DETOUR

END

DETOUR

LOCAL TRAFFIC ONLY

ROAD CLOSED

1/2 MILE AHEAD

DETOUR

DETOUR

FOREST

NATIONAL

SALMON-CHALLIS

CHALLIS

1 1 2

:5

F e b r u a r y

D

E T

O U

R P

L A p w w o r k \d

\i d a f s s c m u lt i1 h b .d g n

CONTROL PLAN

TEMPORARY TRAFFIC

PROJECT

H.2

No Scale

TYPICAL ROAD CLOSURE

(Mounted on type 3 barricade)

48" x 30"

R11-2

(3 EACH)

barricade type 3

Temporary traffic control, 36" x 36"

W20-3

ROAD

CLOSED

CLOSED

ROAD

AHEAD

500'

36" x 36"

W20-3

(Mounted on type 3 barricade)

48" x 30"

R11-2

(3 EACH)

barricade type 3

Temporary traffic control, ROAD

CLOSED

CLOSED

ROAD

AHEAD

500'

:1

O c to b e r

R o a d C lo s u r e

R o a d C lo s u r e

S h e t] p w w o r k \d

\i d a f s s c m u lt i1 h c .d g n

ROAD CLOSURE DETAIL

PROJECT

H.3

ROAD WORK

END

WORK

ROAD

AHEAD

ROAD NAME

WORK

ROAD

AHEAD

ROAD WORK

END

WORK

ROAD

xxxxx

WORK

ROAD

xxxxxxx

ROAD WORK

NEXT xx MILES

WORK

ROAD

AHEAD

xx

MPH

ROAD NAME

ROAD WORK

END

WORK

ROAD

xxxxxxx

ROAD WORK

END

xx

MPH

WORK

ROAD

xxxxxxx

ROAD WORK

NEXT xx MILES

12.

11.

10.

9.

8.

7.

6.

5.

4.

3.

2.

1.

ROAD TYPE

DISTANCE BETWEEN

A B C

NOTE:

M in o r R o a d

M a jo r R o a d

C

B as de ter mi ne d b y t he C

O

Wor k z on e A re a o f I nfl ue nc

(S ee S ign S pa cin g T ab le)

ADVANCE W

ARNI

NG

AREA

(S ee S ign S pa cin g T ab le)

ADVANCE W

ARNI

NG

AREA

A

B

C

A

A

A

A

Pr oje ct Lim its

See Note 8 W16-8P W20-1 over

W20-1

G20-2

See Note 9 W20-1

See Note 9 W20-1

(optional) W13-1P

See Note 10 G20-1

G20-2

See Note 8 W16-8P W20-1 over

G20-2

G20-2

See Note 9 W20-1

See Note 9 W20-1

(optional) W13-1P

See Note 10 G20-1 specify the distance to the work area in feet or in miles. Install an The message on the W20-1 signs may be ROAD WORK AHEAD or may roads only).

name of the road on which the construction does occur (applies to major construction work occurs, include a supplementary plaque indicating the If W20-1 is placed on a roadway other than that on which the actual

Cover post-mounted signs when not applicable.

Do not store traffic control devices along the roadway when not in use.

Maintain two-way traffic during all non-work hours except as approved.

Ensure all sign supports exposed to traffic are crashworthy.

construction area.

needed to indicate a maximum recommended speed through the Install advisory speed plaques under the W20 series warning signs as messages as required.

signs, locate the warning signs to fit field conditions as approved. Vary Where advance warning signs, placed as shown, interfere with permanent operations.

and details in this traffic control plan as necessary to accommodate actual applicable to this project. The Contractor may add or delete information Not all details shown on the temporary traffic control sheets may be

Erect all project advance warning signs before starting construction work.

State standards may be used as an alternative if approved.

verify that an encroachment permit has been obtained.

If signing on a roadway under a jurisdiction other than the client agency, nearest whole mile.

at each end of the project. Show the distance on the G20-1 sign to the

Ro ad N ame

SIGN SPACING TABLE

For work zones that are 2 miles or more in length, install G20-1 signs

Sign Spacing Table.

When used, place the two W20-1 signs "B" feet apart according to the additional W20-1 sign when approach speeds exceed 50 mph.

Expressway / Freeway

NO SCALE

SIGNS IN FEET

Rural greater than 50 mph

Urban and Rural 35 mph to 50 mph

Urban and Rural 30 mph and less

ADVANCE SIGNING

TEMPORARY TRAFFIC CONTROL

635-1

FP-24, FP-14

2/2024

FLH STANDARD

:1 o v e m b e r

S td p w

-w o rk \d

\i d a -f s -s c -m u lt i1 h d .d g n

OFFICE OF FEDERAL LANDS HIGHWAY

U.S. DEPARTMENT OF TRANSPORTATION, FHWA

SPECIFICATION

APPROVED FOR USE

PROJECT

H.4

NO SCALE

posted speed, not the advisory speed.

Approach speed based on the regulatory *

5.

4.

3.

2.

1.

in the buffer space.

Do not allow equipment, materials, or vehicles to be parked or stored

WORK AHEAD (W20-1) and END ROAD WORK (G20-2) signs.

If closure is completely within the project limits, eliminate the ROAD display the name of the Contractor on the pilot car.

sign at a conspicuous location on the rear of vehicle. Prominently

For pilot car operation, mount the PILOT CAR FOLLOW ME (G20-4) conditions as approved.

Final location and spacing of devices may be changed to fit field to those depicted for the opposite direction of travel.

Signs are shown for one direction of travel only. Place signs similar

(optional)

Flagger location

ADVANCE WARNING AREA (See Sign Spacing Table)

TERMINATION AREAVARIABLEBUFFER SPACEABC

WORK

ROAD

AHEAD

See Note 4

W20-1

BE

PREPARED

TO STOP

W20-7

(optional)

W16-2Pxxx

FEET

Flagger location

A

ROAD WORK

END

See Note 4

G20-2

W3-4

Traffic flow

Traffic flow

NOTE:LENGTH AND SPACING TABLE

SIGN SPACING TABLE

LENGTH

BUFFER SPACE

SPEED*

APPROACH

BUFFER SPACE

Spacing Table)

(See Length and

Spacing Table)

(See Length and WORK SPACE

ROAD TYPE

DISTANCE BETWEEN

A B C

Expressway / Freeway

SIGNS IN FEET

Rural greater than 50 mph

Urban and Rural 35 mph to 50 mph

Urban and Rural 30 mph and less

FEETMPH

(WITH FLAGGERS)

ROAD CLOSURE LAYOUT

TEMPORARY TRAFFIC CONTROL

635-5

:1 o v e m b e r

S td p w w o r k

\d

\i d a f s s c m u lt i1 h e .d g n

OFFICE OF FEDERAL LANDS HIGHWAY

U.S. DEPARTMENT OF TRANSPORTATION, FHWA

SPECIFICATION

APPROVED FOR USE

PROJECT

H.5

Traffic flow

Traffic flow not the advisory speed.

Approach speed based on the regulatory posted speed, *

Device spacing

Spacing Table)

(See Length and Channelizing devices

(optional)

BUFFER SPACE

Flagger location

(See Length and Spacing Table)ADVANCE WARNING AREA (See Sign Spacing Table)

ATAPER AREABUFFER SPACEVARIABLEBUFFER SPACETAPER AREAABC

WORK

ROAD

AHEAD

See Note 4

W20-1

ONE LANE

ROAD

AHEAD

xx

MPH

W20-4

(optional)

W13-1P xxx

FEET

W20-7

W16-2P

Flagger location

WORK SPACE

TERMINATION AREA

ROAD WORK

END

See Note 4

G20-2 stored in the buffer space.

Do not allow equipment, materials, or vehicles to be parked or

Requirements, Section 156.

For project specific minimum width, refer to the Special Contract

WORK AHEAD (W20-1) and END ROAD WORK (G20-2) signs.

If closure is completely within the project limits, eliminate the ROAD display the name of the Contractor on the pilot car.

sign at a conspicuous location on the rear of vehicle. Prominently

For pilot car operation, mount the PILOT CAR FOLLOW ME (G20-4) conditions as approved.

Final location and spacing of devices may be changed to fit field to those depicted for the opposite direction of travel.

Signs are shown for one direction of travel only. Place signs similar

6.

5.

4.

3.

2.

1.

(optional)(optional)

NOTE:

SIGN SPACING TABLE

LENGTH AND SPACING TABLE

50' - 100' 50' - 100'

See Note 5

10' min.

ROAD TYPE

DISTANCE BETWEEN

A B C

Expressway / Freeway

SPEED*

APPROACH

AREA

TAPER

SPACE

BUFFER

SPACE

WORK

CHANNELIZING DEVICE

LENGTH

SPACE

BUFFER

Rural greater than 50 mph

Urban and Rural 35 mph to 50 mph

Urban and Rural 30 mph and less

SIGNS IN FEET

FEET

SPACING IN FEET

MPH

(WITH FLAGGERS)

SINGLE LANE CLOSURE LAYOUT

TEMPORARY TRAFFIC CONTROL

635-6

:1 o v e m b e r

S td p w w o r k

\d

\i d a f s s c m u lt i1 h f .d g n

OFFICE OF FEDERAL LANDS HIGHWAY

U.S. DEPARTMENT OF TRANSPORTATION, FHWA

SPECIFICATION

APPROVED FOR USE

PROJECT

H.6

See post detail (typ.)

Breakaway holes

See table for hole size parallel to sign face.

Field drill holes through post

Bottom of sign panel

Post�

Local tangent

< 10

" diameter4 1Attach sign panels with a minimum of two a minimum lateral distance of 1 ft behind the face of lateral offset of 2 ft may be used. In areas with curbs, 6" x 6" or larger.

Use 7 ft minimum spacing between posts for sign posts and 6 ft minimum mounting height for secondary sign.

use 7 ft minimum mounting height for main sign

NOTE:

90°

93°

WOOD POST SELECTION TABLE

X X

0.75X

H

H

X

0.2X0.6X 0.2X

Y

H

D

H

D

H

D

Long side of post

D

7.

6.

5.

4.

3.

2.

1.

In areas where lateral distance is limited, a minimum

D = Post embedment depth for average soil conditions.

Select post lengths to fit field conditions.

H1 and H2 = Overall post length.

bolts per post.

In pedestrian locations, or in areas with obstructed views, the curb may be used.

SINGLE POST SIGN TWO POST SIGN

SIGN INSTALLATION ANGLE

POST DETAIL

E d g e o f s h o u ld e r

E d g e o f tr a v e le d w a y

State standards may be used as an alternative if approved.

S e e N o te m in

S e e N o te m in

See Note 4

6' - 12'

On tangent alignment

200'

"X"

WIDTH AREA

OF POSTS

NUMBER POST SIZE D HOLE SIZE

(SQFT)

Other Shapes ≤ 48" Diamond ≤ 36"

Other Shapes ≤ 12' Diamond ≤ 48"

(INCH) (INCH) (INCH)

Diamond ≤ 48"

65 - 95

65 - 95

50 - 65

50 - 65

20 - 50

10 - 20

10 - 20

> 30'

> 17'

12' - 16'

> 13'

6 x 6

4 x 6

4 x 6

6 x 6

4 x 6

4 x 4

6 x 6

4 x 6

4 x 4

1.5

1.5

1.5

1.5

WOOD POSTS

SIGN INSTALLATION

TEMPORARY TRAFFIC CONTROL

635-14

:5

N o v e m b e r

S td p w

-w o rk \d

\i d a -f s -s c -m u lt i1 h g .d g n

OFFICE OF FEDERAL LANDS HIGHWAY

U.S. DEPARTMENT OF TRANSPORTATION, FHWA

SPECIFICATION

APPROVED FOR USE

PROJECT

H.7

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