Historic Photographs

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Montana

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Helena vicinity

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



B&W Photos

HB744343
General View, Southwest Side

HB744344
Southwest And Southeast Sides

HB744345
Northwest And Southwest Sides

HB744346
Southeast Portal

HB744347
Southeast Portal Nameplate

HB744348
Deck Planking Viewed From Northwest

HB744349
Detail Of Vertical Members

HB744350
Detail Of Upper Chord And Portal Connections At Northwest Corner

HB744351
Detail Of Northwest Portal

HB744352
Detail Of Lower Chord Connection, Lateral Bracing And Timber Stringers

HB744353
Oblique Detail Of Shoe Arrangement On Pier No

HB744354
Detail Of Shoe Arrangement On Pier No

HB744355
Detail Of Shoe Arrangement Without Cable Support Modification

HB744356
Detail Of Northeast Abutment Showing Shoe And Pin Connection


Data Pages


Photo Caption Pages


Item Title


Location
Federal Aid Secondary Route 280, Helena vicinity, MT

Find maps of Helena, MT


Created/Published
Documentation compiled after 1968.

Notes
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
Civil Engineering
Power Industry
Transportation


Related Names
Holter , Anton
Hauser ,
Helena Power Transmission Company
Minneapolis Steel & Machinery Company
Edmondstone, G. S.
Wegner, J. F.
Smith, Travis, Photographer
Quivik, Fredric L., Historian
Steere, Peter L., Historian


Collection
Historic American Engineering Record (Library of Congress)

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


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