Attachment 2: ALPO-Staple Bend Tunnel-Drawings - 7 31 2025

SCALE OF MILES

F

PROJECT LOCATION

SCALE OF KILOMETERS

E

Map data (c) OpenStreetMap contributors, Microsoft, Facebook, Google, Esri Community Maps contributors, Map layer by Esri Powered by Esri

D

PARK MAP

VICINITY MAP

SCALE: NTS

C

B

SHEET

SUB SHEET

SHEET TITLE

G1

COVER SHEET

G2

STAGING PLAN

S1

SITE LAYOUT

S2

PROPOSED & EXISTING MITIGATIONS STA 1+00 TO STA 3+00

S3

PROPOSED & EXISTING MITIGATIONS STA 3+00 TO STA 5+00

S4

PROPOSED & EXISTING MITIGATIONS STA 5+00 TO STA 7+00

S5

PROPOSED & EXISTING MITIGATIONS STA 7+00 TO STA 8+00

S6

ROCK BOLT & SHORING LOCATION PLAN

S7

ROCK BOLT & SHORING DETAILS

S8

NORTH & SOUTH TUNNEL ENTRANCES

A

TETRA TECH - 140P2021D0008

PRIME:

GREAT WEST

ENGINEERING

HELENA, MT

MARK

GEOTECHNICAL:

TETRA TECH

ENNIS, MT

08/04/2025

SHEET

DESCRIPTION

DATE

INITIAL

QUALITY DESIGN CERTIFICATION

PREPARED IN ACCORDANCE WITH DESIGN

OR
DRAWING NO.

VARIANCE FROM DESIGN DEVELOPMENT (TITLE I)

OR
DRAWING NO.

CONSTRUCTION DRAWING NOT PRECEDED BY DESIGN

DEVELOPMENT (TITLE I)

PROJECT MANAGER

DATE

CONSTRUCTION DRAWINGS

UNITED STATES

DEPARTMENT OF THE INTERIOR

NATIONAL PARK SERVICE

DENVER SERVICE CENTER

TITLE OF PROJECT

DRAWING NO.

LOCATION WITHIN PARK

196450

STABILIZE STAPLE BEND TUNNEL 423

STAPLE BEND TUNNEL

NAME OF PARK

PKG
NO.

SHEET

ALLEGHENY PORTAGE RAILROAD NATIONAL HISTORIC SITE (ALPO)

REGION

N. ATLANTIC

COUNTY

CAMBRIA

STATE

PENNSYLVANIA

Bar measures 1 inch, otherwise drawing not to scale

OF

Copyright: Tetra Tech

8/1/2025 11:25:47 AM - Autodesk Civil 3D 2025 - C:\USERS\BRADY.GROVE\ONEDRIVE - TETRA TECH, INC\NPS STAPLE BEND TUNNEL - TO SUBMIT\IFU\IFU CD PACKAGE\INDIVIDUAL CD\STAPLE BEND TUNNEL - ACAD FILES\G1 COVER SHT.DWG - GROVE, BRADY

THIS PROJECT

STAPLE BEND

TUNNEL

TO STAPLE BEND TUNNEL PARKING AREA,

2 MILES FROM NORTH PORTAL

F

STAGING AREA

E

NORTH PORTAL ACCESS AND

PARKING FOR EQUIPMENT

NORTH TUNNEL ENTRANCE

NORTH TUNNEL ENTRANCE

SCALE: NTS

D

SOUTH TUNNEL ENTRANCE

STAGING AREA

C

SOUTH TUNNEL ENTRANCE

TRAIL CONTINUES SOUTH

SCALE: NTS

NOTES:

1.

CONTRACTOR SHALL ESTABLISH SAFETY BARRIERS FOR PEDESTRIANS AND EMPLOYEES BASED ON STAGING AREA LOCATIONS.

2.

CONTRACTOR SHALL ESTABLISH AN EMERGENCY ACTION PLAN MEETING AREA.

3.

ALL EQUIPMENT AND MATERIALS PLACEMENT SHALL BE COORDINATED WITH AND APPROVED BY THE CO.CONTRACTOR SHALL KEEP ALL CONSTRUCTION EQUIPMENT, STAGING, AND MATERIALS AWAY FROM STAPLE BEND TRAIL AREA EXCEPT WHEN IN USE WITHIN THE TUNNEL.CONTRACTOR SHALL PROTECT LAWN AND NEARBY VEGETATION THROUGH PRIOR APPROVED SITE MOBILIZATION PLAN.

4.

CONTRACTOR SHALL KEEP STAGING AREA CLEAN AND MATERIALS ORGANIZED AS DEFINED IN SPECIFICATION 017419 .

5.

THE NEAREST BATHROOM FACILITIES ARE LOCATED AT THE STAPLE BEND TRAILHEAD.