Promontory Route Railroad Trestles, Trestle 790B, 11 miles west of Corrine, Corinne

Source document Quoted word for word from HAER UTAH,2-CORI.V,1E-. Not written, edited or summarised by this site.

This trestle is one of many remaining Promontory Route railroad trestles which were originally part of the first transcontinental railroad route con- structed across the United States. These trestles represent a class of small utilitarian wooden trestles constructed throughout the country during the latter half of the century. PART I. HISTORICAL INFORMATION 1. Date of Construction: 2. Railroad Structure Designation: (at milepost 3. Architect: Central Pacific Railroad Company 4. Original and subsequent owners: Central Pacific Railroad Company, Southern Pacific Transportation Company, 1884-present 5. Builders, contractors, suppliers: Central Pacific Railroad Company 6. Original plans and construction: Unknown 7.

Alterations and additions: cap beam replaced, three cap beams re- placed, 3 ties replaced, 8. Comments: The and Bridge Inspection Books1 show this trestle to be an open deck structure which is 32 feet long and 8 feet high. It has four 7- by-16-inch stringers and four-pile bents which are untreated. In a cap beam was replaced and in three were replaced. Three ties were replaced in It was rated in good condition in PROMONTORY ROUTE RAILROAD TRESTLES, TRESTLE (TRESTLE "E") HAER No. UT-64-E (page 2) PARTH. ARCHITECTURAL INFORMATION This is a two-span wooden framed trestle 31 feet long and 4 feet 6 inches high (water level to bottom of rail). The deck rests on three four-post bents, which in turn, have large cap beams resting upon them.

On these cap beams rest two sets of paired 16-inch stringers running the length of the trestle. On these stringers rest railroad ties. The use of four-post bents suggests that only "light loading" (use of E-45 locomotives) of the trestle was proposed.2 The bulkheads at each end of the trestle are made of 2-by-12-inch stacked boards resting on edge which are held up by the end bents under the deck and by inch posts on the wings. The bulkhead wings are flared at a 45 degree angle. Most nails in the structure are wire nails, but a few cut nails were found in one old 8-by-10-inch squared post in a wing wall. 1. Southern Pacific Transportation Company, Salt Lake Division, Bridge Inspection Books and On file at the Southern Pacific Transportation Company, San Francisco, California. 2.

M&lter Loring Webb, Railroad Construction, Theory and Practice, New York: John Wiley & Sons, Inc., p. PROMONTORY ROUTE RAILROAD TRESTLES, TRESTLE (TRESTLE "E") HAER No. UT-64-E (page 3) ( w \ L- - x As West Location of Trestle 790B("E"). Taken from: USGS Public Shooting Grounds, Utah Quadrangle