Clyde Smith

Jul 9, 2023 | sandiegouniontribune.com | Merrie Monteagudo |Clyde Smith

Seventy-five years ago today, on July 9, 1948, 20 tons of explosives were used to bring down a granite hill in Missing Gorge in what was then a record for a commercial blast in the county. Rocks blasted loose from the quarry site in Mission Gorge were hauled 15 miles west to construct the jetties at the mouth of Mission Bay. From the San Diego Union, Saturday, July 10, 1948:20-TON POWDER BLAST RIPS MOUNTAIN TO BITSBy Clyde V.