On a siding just feet south of the trestle stands this remnant of the glory days of railroading. A tank car was permanently stationed here with a like sized tank mounted 50 feet or so above on the hillside behind. The two are connected together with a 4" pipe. Any guesses? WWRRROOONNGG! Time's up. They are part of a fire fighting system protecting the trestle. On the platform above my head sits a diesel pump capable of emptying these cascaded tankers through hoses located along a catwalk built 50 feet below the trestle summit. If the pump had failed, there would still be considerable pressure generated from the vertical drop between upper tank and catwalk. Pretty cleaver, these old railroaders.