The Gila River runs for hundreds of miles through New Mexico and Arizona. For centuries it ran wild, sometimes flooding, many times dry, until the early 1900s when the U.S. federal government built a number of dams.
The Coolidge Dam was started during the administration of Calvin Coolidge, finally being completed in 1930, after Silent Cal was out of office. Regardless Cal and his wife came to this remote area of Arizona for the dedication.
Also there was noted satirist Will Rogers, who when he gazed out at what was supposed to be a lake behind the dam, but was nothing but tall grasses because of an ongoing drought remarked ‘someone should mow the lake’.
Not long ago it was almost back down to nothing but weeds but thanks to a very rainy couple of monsoon seasons and a equally rainy winter, the lake is back.

The dam and lake is located in a mountainous area of the San Carlos Apache Reservation.


The dam is designed with three concrete domes, supported by buttresses. After 100 years of Arizona weather, the dam looks a bit rough, even with major reconstruction in the 1990s.

The dam is 580′ long, and consists of a 2 lane roadway.

The art deco architecture of it’s 1920s construction is evident.



The dam is 249′ above the Gila River.


The reservoir behind the dam is known as San Carlos Lake.


U.S. route 70 is a major 2 lane route through much of Arizona (and across the country). It’s original design ran straight from Safford to Globe, but once the dam and lake were completed it was re-routed to take a scenic route up to and across the dam, before returning to the main route.
After about 20 years the straighter route was repurposed for U.S. 70, but by this time the state had placed mile markers on the longer, dam route. As a result when the road returned to it’s original route, it was ‘missing’ 12 miles. Rather than replace all the mile markers from here to New Mexico, they just skipped it, so to this day if you drive along U.S. 70 the mile markers make an unexplained 12 mile jump. The Arizona DOT has a page detailing this anomoly. https://azdot.gov/adot-blog/case-us-70s-missing-12-miles
The dam route was obviously built for the U.S. highway system of the 1930s as there are bridges across all of the washes, but the road doesn’t look as though it has been repaved in 90 years. Though bumpy as hell, it is a scenic ride.
