appendix c map book › projects › contextsensitivesolutions › ...feet i-70 design speed study...

Appendix C Map Book

Figure 1

Figure 2 Figure 3 Figure 4 Figure 5

Figure 6Figure 6a

Figure 6bFigure 6c

Figure 7

Key Map

0 7.5 15 22.5 30Miles

I-70 Design Speed StudyFigure 1 - West of Wolcott

6

2482

EagleGarfield131

Grand

ClearCreek

ParkPitkin

Lake

Boulder

Jeffe

rson

70

Summit

DFigure 2 - AvonFigure 3 - Dowd CanyonFigure 4 - West Side of Vail PassFigure 5 - Frisco to Silverthorne

Figure 6 - MM 213 to 247Figure 6a - EJMT to Herman GulchFigure 6b - Herman GulchFigure 6c - East of Twin TunnelsFigure 7 - Morrison to Chief Hosa

155

156

Figure 1West of Wolcott

MM 155 to 156Conditions

0 500 1,000 1,500 2,000Feet

I-70 Design Speed Study

Proposed curve safety modificationsLegend

55 and 65 mph PEIS Alternative Footprints

AGS Hybrid AlignmentExisting Alignment

Mile Posts

62482

70

131

EagleGarfield131

Grand

ClearCreek

ParkPitkinLake

Boulder

Jeffe

rson

70

Existing Posted Speed (MP 135 - MP 165)

Existing Design Speed: 55 mphExisting Prevailing Speed: Not Available

Existing 55 mph Curve

No distinguishing difference between PEIS alternatives

6

Design speed of the curve less than surrounding highway

Summit

AGS Tunnel Locations

Wolcott

DRAFT

167

168

Figure 2Avon

MM 167 to 168ConditionsLegend

55 and 65 mph PEIS Alternative Footprints


Mile PostsAGS Tunnel Locations

Proposed EB (uphill) auxiliary lanesNo distinguishing difference between PEIS alternatives

62482

EagleGarfield131

Grand

ClearCreek

ParkPitkinLake

Boulder

Jeffe

rson

70Summit


Existing Design Speed: 55 mphExisting Prevailing Speed: 65 mph

Post Blvd

Swift Gulch Rd

E. Beaver Creek Blvd

Avon

6Existing 55 mph Curve

70


0 500 1,000 1,500 2,000Feet

171

170

173

172

Dowd CanyonMM 170 to 173

ConditionsProposed Six Lane Highway Capacity

0 750 1,500 2,250 3,000Feet

Proposed Curve Safety Modifications

62482

EagleGarfield

131Grand

ClearCreek

ParkPitkinLake

Boulder

Jeffe

rson

70

Legend55 and 65 mph PEIS Alternative Footprints


Mile Posts55 mph PEIS Alternative Footprint65 mph PEIS Alignment Footprint

Summit

65 mph Proposed Tunnel Location



Proposed 65 mphTunnel Location



Existing Design Speed: 55 mphExisting Prevailing Speed: Not AvailableExisting 55 mph Curve


Design speed of the curve less than surrounding highway

70

24

6

New interchange for bypassand US 24 access

New interchange for bypassand US 24 access

Emergency Bypass & US 24 Interchange Access

Additional footprint needed for interchanges, staging areas and tunnel waste disposal

Existing I-70 roadway to be used for emergency bypass and US 24 interchange access

AGS Tunnel

Assume the new bypass access is likely to be a split interchange65 mph PEIS Alignment Tunnel

Eagle River

Gore Creek


183

182

181

180

185184

Figure 4West Side of Vail Pass


0 0.5 1 1.5 2Miles


Legend

187

186

190

189

188

185

62482

EagleGarfield131

Grand

ClearCreek

ParkPitkinLake

Boulder

Jeffe

rson

70Summit

Steep grades MP 180 - MP 18555 and 65 mph PEIS Alternative Footprint


Mile Posts

Proposed EB (uphill) auxiliary lanesProposed WB (downhill) auxiliary lanes

AGS Tunnel LocationsNo distinginguishable difference between PEIS alternatives


Existing Design Speed: 55 mphExisting Prevailing Speed: 59 mph for WB

and 61 mph for EB





Black Lake

70

70

DRAFT

203

202

205

204

Figure 5Frisco to Silverthorne


0 0.25 0.5 0.75 1Miles


LegendSteep Grade - MP 203 - MP 20555 and 65 mph PEIS

Alternative FootprintExisting AlignmentMile Posts

EB auxiliary lanesNo distinguishable difference between PEIS alternatives

Wildernest

SilverthorneDillon

Dillon Reservoir

Frisco9

7



and 65 mph for EB

62482

EagleGarfield131

Grand

ClearCreek

ParkPitkinLake

Boulder

Jeffe

rson

70Summit

70

DRAFT

247

239231

223215

243

235

227219

242

234

226218

246

238230

222

214

245

237

229

221213

244

236

228

220

241

233

225217

240

232

224216

Figure 6MM 213 to 247

0 2 4 6 8Miles


Mitigation/Design ExceptionsConditionsLegend55 and 65 mph PEIS Alternative Footprints


Mile Posts

62482

EagleGarfield

131Grand

ClearCreek

ParkPitkinLake

Boulder

Jeffe

rson

70

Summit

6a 6b

6c

6

40

103

Central City Black

Hawk

Empire

GeorgetownSilver Plume

70

Central City Pkwy

CO-119

AGS Station LocationDRAFT

215

218

217

216

Figure 6aEJMT to Herman Gulch


0 1,000 2,000 3,000 4,000Feet


LegendSteep grade MP 215 - MP 21655 and 65 mph PEIS

Alternative FootprintExisting AlignmentMile Posts

Proposed EJMT third boreProposed EB and WB auxiliary lanesNo distinguishable difference between PEIS alternatives

EJMT



and 50 mph for EB



and 65 mph for EBLoveland Pass6

70

62482

EagleGarfield131

Grand

ClearCreek

ParkPitkinLake

Boulder

Jeffe

rson

70Summit

DRAFT

219218

221

220

Figure 6bHerman Gulch

to BakervilleMM 218 to 221

Conditions

0 1,000 2,000 3,000 4,000Feet


Legend



and 65 mph for EB

62482

EagleGarfield131

Grand

ClearCreek

ParkPitkinLake

Boulder

Jeffe

rson

70Summit

Proposed WB auxiliary lane55 and 65 mph PEIS Alternative FootprintExisting AlignmentMile Posts

No distinguishable difference between PEIS alternatives

70

Herman Gulch Rd

Frontage Rd

W Bakerville Rd

247

243242

246

245

244

East of Twin TunnelsMM 242 to 247

0 0.25 0.5 0.75 1Miles


62482

EagleGarfield

131Grand

ClearCreek

ParkPitkinLake

Boulder

Jeffe

rson

70

Summit

70

US 40

(Hom

estea

d Roa

d)

Twin Tunnels

Central City Pkwy

6

DRAFT

Legend55 and 65 mph PEIS Alternative Footprints


Mile Posts55 mph PEIS Alternative Footprint65 mph PEIS Alignment Footprint


65 mph PEIS Alignment Tunnel

New Interchangefor EB bypass

and US 6 access

Existing CurveLess than 55 mph

Existing Posted Speed (MP 242 - MP 247) WB ONLY

Existing 55 mphCurve

Proposed 65 mphEB Tunnel Location

New interchangefor EB bypass

and US 6 access

AGS Tunnel Existing Design Speed: <55 mphExisting Prevailing Speed: 52 mph/48 mph

Existing 55 mphCurve




Existing Posted Speed EB ONLY

Existing Design Speed: <55 mphExisting Prevailing Speed: 61 mph/55 mph

MP 245 - MP 260 MP 242 - MP 245



ConditionsProposed curve safety modificationsProposed six-lane highway with bike trail and frontage roads

65 mph Proposed Floyd Hill Tunnel (EB only)

Design speed of some curves less than the surrounding highwayAdditional footprint needed for interchanges, staging areas and tunnel waste disposal

Existing I-70 roadway to be used for EB emergency bypass and US 6interchange access

Assume the new bypass access is likely to be a split interchange

Proposed 65 mphWB Tunnel Location

Existing Curve less than 55 mph

255

254

253

259

258257

256

Figure 7Morrison to Chief Hosa


0 0.25 0.5 0.75 1Miles


LegendSteep grade MP 252 - MP 25455 and 65 mph PEIS

Alternative Footprint


Mile Posts

Proposed WB (uphill) auxiliary lanesNo distinguishable difference between PEIS alternatives



Existing Design Speed: 55 mphExisting Prevailing Speed: 64/62 mph for WB

and 64 mph for EB

Genesee

45 93


40

Chief Hosa


DRAFT


appendix c map book › projects › contextsensitivesolutions › ...feet i-70 design speed study...

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