Neawanna Creek Bridge, Spanning Neawanna Creek at Milepoint 19.72 on U.S., Seaside vicinity, Clatsop County, OR

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

14 b&w photos
2 data pages
2 photo caption pages

TITLE:
Neawanna Creek Bridge, Spanning Neawanna Creek at Milepoint 19.72 on U.S., Seaside vicinity, Clatsop County, OR

CALL NUMBER:
HAER OR-129

REPRODUCTION NUMBER:
[See Call Number]

MEDIUM:
Photo(s): 14 (4 x 5)
Data Page(s): 1 plus cover page
Photo Caption Page(s): 2

DATE:
Documentation compiled after 1968.

CREATOR:
Historic American Engineering Record, creator

NOTE:
Survey number HAER OR-129

Significance: The Neawanna Creek Bridge #1305 is significant as an intact example of a 1930s continuous concrete, multi-span highway bridge, utilizing Hardy Cross's moment distribution theory, and for its association with C.B. McCullough, Oregon's premier bridge engineer. The configuration of continuous concrete T-Beam construction utilized in the design of the 1930 Neawanna Creek Bridge represents a significant change in structural engineering theory and reinforced concrete technology by applying the moment distribution technique of distributing loads on girder structures. The moment distribution theory for continuous concrete frames was developed in the late 1920s by Hardy Cross, a civil engineer and professor of structural engineering at the University of Illinois. Hardy Cross was regarded by his contemporaries as a leader in a new school of thought in the field of structural analysis, and his theory is regarded by many architects and engineers to be one of the more significant structural theories developed during the 20th century. C.B. McCullough served as State Bridge Engineer, and later as the Assistant State Highway Engineer, of Oregon from 1919 until his death in 1946. He authored a number of books and technical articles on bridge design and construction. McCullough is significant for his use of innovative bridge technology, and for his visually appealing designs. He had attained international recognition for the large-scale structures designed to span the major rivers and estuaries along the Oregon coast for the completion of the Orange Coast Highway in the 1930s.

SUBJECTS:
OREGON--Clatsop County--Seaside vicinity

OTHER TITLE:
Wahanna 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.or0508

CONTENTS:
Photograph caption(s):
1. Topographic view of Neawanna Creek Bridge, view looking northeast
2. General perspective view of Neawanna Creek Bridge, view looking north, east side of structure
3. General perspective view of Neawanna Creek Bridge, view looking north, west side of structure
4. General perspective view of Neawanna Creek Bridge, view looking northwest
5. General perspective view of Neawanna Creek Bridge, showing articulated fascia walls
6. General perspective view of Neawanna Creek Bridge, showing bush-hammered, recessed panels in fascia wall
7. Elevation view of Neawanna Creek Bridge, view looking east
8. Approach view of Neawanna Creek Bridge, view looking north
9. Substructure view of Neawanna Creek Bridge, view looking south
10. Substructure view of Neawanna Creek Bridge, view looking south
11. Detail view of arched balustrade railing
12. Elevation detail view of the decorative, reinforced concrete, arched balustrade railing
13. Detail view of cast concrete rail cap
14. Detail view of bridge plaque

CONTROL #:
OR0508

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