The Parker-Mayberry Bridge was built in 1916, three years after the Colorado Street Bridge. I had thought it was the older of the two, but no. The earlier structures on this spot in the Arroyo Seco were the Scoville Dam and Bridge. "Remnants of the early construction can still be found there," according to the Arroyo Seco Foundation.
The Parker-Mayberry is closed to automobile traffic, but you can approach it on foot. While walking in the Lower Arroyo Park, continue north on the west side of the the wash past the footbridge and cross under the Parker-Mayberry and Colorado Street Bridges. Soon you'll be above the water where I took this picture early in my blogging career. From here you can walk onto the Parker-Mayberry Bridge. Behind you there's stonework; likely the remnants the Arroyo Seco Foundation refers to.
Dogs on leash. Look out for poison oak. Let me know what you find.