That black "line" across the photo is my wind-
shield wiper, which I had to use today - for RAIN! It hasn't rained here in ages. It rained all of 0.12" today, and I was thrilled.
It is wonderfully clear after a rain. So I went to San Diego's Mission Trails Regional Park, a few miles north of my house. The photo below shows the view north of the visitor's center, down into Mission Gorge.
This next photo shows a section of the Old Mission Dam - built by the Native Indians under the supervision of the Franciscan Fathers.
Construction was completed between 1813-1816. It fell into disuse after the early 1830s due to constant flooding. It introduced a good water supply for agriculture and crops. The Franciscans of Mission San Diego de Alcala brought agriculture to the Indians in this area. Before that a main source of their diet was wild game, fish, and things like acorns. Efforts to build a dam had been tried as far back as 1775. This dam is a historical landmark, and was a frequent destination for San Diego picnickers in the early 1900s.
Water conservation is so important in California - as is the aqueduct system. On Labor Day when I stopped in Santa Nella, I also had occasion to drive over the present day aqueduct. This aqueduct is over 400 miles long.
No one who lives in California long, ever takes water for granted!