Hermon Park (Arroyo Seco Park)

Point 4.

"Arroyo Seco Trail #6, 'Oh, Dam!'"

Coordinates 34.144, -118.166

Small plastic tube.

The Scoville Dam and Bridge were built between 1887 and 1903, largely from parts of an older railroad truss. The bridge portion was washed away in 1914 and replaced by this, the Parker-Mayberry Bridge in 1916.

The Arroyo Seco was a deep, steep-sided canyon that physically isolated Pasadena from its western neighbors. Travelers would have to make long north or south detours to crossings until James Scoville (who was a trustee of what would later be known as California Institute of Technology) built a small dam and pump house. The top of the dam served as the eastern abutment of the Scoville Bridge, the first to connect Pasadena to the western side of the Arroyo. The bridge was still in service when the much larger and grander Colorado Blvd. bridge was built above it.

(don't go putting your lives at risk, folks! The cache is on the opposite side of the trail from the dam and bridge.)

Hint: Tubular.

Found it?