Installing Cattle Guards on I-8 Ramp in Casa Grande

Westbound I-10 to west bound I-8 ramp south of Casa Grande will be closed for about 2 months as the Arizona Department of Transportation continues an improvement project along I-8 from Bianco Road to the I-10 junction that includes installing cattle guards.

The $7.3 mm improvement project on I-8 includes new pipe extensions, guardrails and cattle guards, & lowering I-8 at Thornton Road to meet a new bridge height of sixteencattle guards being added on I-8 feet.

Volunteers Install Cattle Guard in San Rafael Swell

Volunteers rebuilt the fence and installed a cattle guard at Fuller Bottom in San Rafael Swell.

Two projects at Joe’s Valley made improvements to  trails and stabilized some sites. Joe’s Valley is known world-wide as a place to boulder. These projects were done with the Manti La Sal Forest and the Access Fund and Salt Lake Climbing Alliance. In addition to the work at the sites, the group also cleaned up and removed garbage in Cottonwood and Straight canyons.installing cattle guards. Cattle gate.

The History of Cattle Guards – Cattle Guards Were Patented in the Early 1970s Shivers

US patent number 3719004 A covers the original cattle guard.

The claim is for:
“Cattle guard apparatus adapted for installation either on lever ground or across a ditch or trench, comprising an open rectangular frame formed by two longitudinal end members and two longitudinal side members disposed in the same plane and connected at their ends. . . ”

And it goes on for another few hundred words.  That is a mouthful to describe such a simple concept.

Interestingly the patent refers to another patent for a Portable vehicle operated gate (patent 3516202 A) that was filed in 1968.  This patent seems to be almost identical to the standard cattle guard or gate except with a spring loaded middle.  It appears that idea was to raise the grates so the animal would be more fearful of crossing.

Original cattle guard patent drawing from 1968
Original cattle guard patent drawing from 1968