York Bridge, Federal Aid Secondary Route 280, Helena vicinity, Lewis and Clark County, MT

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Historic American Buildings Survey/Historic American Engineering Record/Historic American Landscapes Survey

14 b&w photos
18 data pages
1 photo caption pages

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TITLE:
York Bridge, Federal Aid Secondary Route 280, Helena vicinity, Lewis and Clark County, MT

CALL NUMBER:
HAER MONT,25-HEL.V,3-

REPRODUCTION NUMBER:
[See Call Number]

MEDIUM:
Photo(s): 14 (4 x 5 in.)
Data Page(s): 17 plus cover page
Photo Caption Page(s): 1

DATE:
Documentation compiled after 1968.

CREATOR:
Historic American Engineering Record, creator

NOTE:
Survey number HAER MT-2

Building/structure dates: 1906 initial construction

Building/structure dates: 1908 subsequent work

Building/structure dates: 1978 subsequent work

Building/structure dates: 1981 demolished

Significance: As a pin-connected Pennsylvania through truss structure, the bridge is not particularly significant for structural or engineering reasons. It is however, historically associated with the Helena Power Transmission Company and the building of the Hauser Dam, which was a significant early development in electrification of the state. Through their interest in the Helena River Transmission Company, York Bridge is also historically associated with the careers of two prominent Montana political and economic developers, Anton Holter and Samuel Hauser.

SUBJECTS:
MONTANA--Lewis and Clark County--Helena vicinity
civil engineering
power industry
transportation

OTHER TITLE:
Trout Creek Bridge

COLLECTION:
Historic American Engineering Record (Library of Congress)

REPOSITORY:
Library of Congress, Prints and Photograph Division, Washington, D.C. 20540 USA

DIGID:
http://hdl.loc.gov/loc.pnp/hhh.mt0044

CONTENTS:
Photograph caption(s):
1. GENERAL VIEW, SOUTHWEST SIDE
2. SOUTHWEST AND SOUTHEAST SIDES
3. NORTHWEST AND SOUTHWEST SIDES
4. SOUTHEAST PORTAL
5. SOUTHEAST PORTAL NAMEPLATE
6. DECK PLANKING VIEWED FROM NORTHWEST
7. DETAIL OF VERTICAL MEMBERS
8. DETAIL OF UPPER CHORD AND PORTAL CONNECTIONS AT NORTHWEST CORNER
9. DETAIL OF NORTHWEST PORTAL
10. DETAIL OF LOWER CHORD CONNECTION, LATERAL BRACING AND TIMBER STRINGERS
11. OBLIQUE DETAIL OF SHOE ARRANGEMENT ON PIER No. 2 ON SOUTHWEST SIDE SHOWING 1978 CABLE SUPPORT MODIFICATION
12. DETAIL OF SHOE ARRANGEMENT ON PIER NO. 2 ON SOUTHWEST SIDE
13. DETAIL OF SHOE ARRANGEMENT WITHOUT CABLE SUPPORT MODIFICATION
14. DETAIL OF NORTHEAST ABUTMENT SHOWING SHOE AND PIN CONNECTION

CONTROL #:
MT0044

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