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Hereford Bridge

Bridges in ArizonaNational Register of Historic Places in Cochise County, ArizonaTruss bridges in the United States
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The Hereford Bridge spans the San Pedro River near Hereford, Arizona, and was built in three stages. The first one was built in 1912–1913, consisting of a single span truss, with steel cylinder piers as supports. It as constructed by the Midland Bridge Company of Kansas City, Missouri for a cost of $3,112, and completed in March 1913. Two years later, Cochise County ordered a second span, as well as moving the original span approximately two-hundred feet upriver. The project was completed in 1915 by Bane and Tarrant, using a superstructure manufactured by Penn Bridge Company of Beaver Falls, Pennsylvania. The third and final stage was done in 1927, consisting of a third pony truss span. It was constructed by the Ware Company of El Paso, Texas, using a hundred-foot truss from the Virginia Bridge and Iron Company of Roanoke, Virginia. While the bridge is typical, the fact that it was constructed in stages is unusual. The span constructed in 1912 is one of the two earliest trusses used for transporting vehicles in Arizona.The bridge consists of three spans, with a 102-foot span length and an overall roadway length of 267 feet. The roadway width is 15.7 feet. It is constructed of riveted steel, with 10-panel Warren pony trusses, concrete abutments, concrete wingwalls, and concrete-filled steel cylinder piers. There is a concreted deck over steel stringers.

Excerpt from the Wikipedia article Hereford Bridge (License: CC BY-SA 3.0, Authors, Images).

Hereford Bridge
East Hereford Road,

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Wikipedia: Hereford BridgeContinue reading on Wikipedia

Geographical coordinates (GPS)

Latitude Longitude
N 31.438333333333 ° E -110.10722222222 °
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East Hereford Road 10906
85615
Arizona, United States
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Junk Bond Observatory

The Junk Bond Observatory (JBO; code: 701) is located in the Sonoran Desert at Sierra Vista, Arizona, United States. It was established by amateur astronomer David Healy in his backyard in 1996, using a Celestron 14 SCT and a 16-inch Meade LX200 telescopes in a roll-off shelter. In 2000, a 20" Ritchey-Chretien was installed, to be replaced by a 32" Ritchey in 2004. Asteroid searches began in 1998 using a local computer network and search software. The first discovery at the observatory was made by Jeff Medkeff in June 1999. It was named 38203 Sanner after Glen Sanner also a member of the Huachuca Astronomy Club.As of November 2016, a total of 272 numbered minor planets have been discovered at the observatory, using a 32-inch telescope. The Minor Planet Center credits 219 of these discoveries to David Healy and/or Jeff Medkeff. The discovery of the remaining 53 numbered minor planets is credited directly to the observatory (see list below).Until his death in 2011, David Healy was a frequent contributor of follow-up observations to objects on the Minor Planet Center's Near-Earth Object Confirmation Page, surveyed for asteroids netting approximately four new discoveries per month as of January 2007, performed discovery and confirmation photometry of extrasolar planet transits, and performed photometry of cataclysmic variable stars and active galactic nuclei. The telescope operated robotically, unattended for most of the night, controlled by software by Bob Denny and Jeff Medkeff. JBO was dismantled in August 2021. The telescope, dome, and other equipment were purchased by a private buyer.