National Geographic : 1969 Oct
Dead end: An ever-deepening washout cleaves Glencoe Heights Drive as rains still pelt Glendora. Gas pipes stretch like bared tendons beside a sheared irrigation pipe. Barricade of railroad ties thrown up by Detro H. Sells eventually succumbed to floods, and slides piled 10 feet of debris against his "This season visitor wear and tear will be the least of our problems," I heard Angeles Forest Supervisor Bill Dresser tell the Los Angeles County Watershed Commission. "We've lost so many bridges, roads, and trails that people simply won't be able to get in. We think it will take all summer and the better part of $10,000,000 to put us back into the recreation business." When the streams leave the national forest, they become the responsibility of local district flood-control organizations. Their debris ba sins cleanse the water of silt; their holding dams store it until it is safe to release in con 572 trolled amounts. After this the streams cross the coastal plains in sturdy concrete channels built, like other major flood defenses in the southland, by the U. S. Army Corps of Engi neers but turned over, with a few exceptions, to the local authorities for operation and maintenance. Water Is Short Despite Floods In the plains the flow is swelled by heavy runoff from the roofs and streets of the urban areas. Thus augmented, the rivers head for the sea, most of them still in artificial channels of heavy concrete.