History of the Marsh
When the Palos Verdes Peninsula was geologically uplifted, it blocked off the Los Angeles River .
The natural drainage to the sea was halted and created a large inland drainage area as the river
proceeded to shift to the east to its existing course. Historians say that during the early 1800s
when the Gabrielino Indians inhabited the South Bay area, Torrance was part of the extensive
marshlands north of the San Pedro and Long Beach area.
The local Indians knew the marshlands as "cienegas". The largest of the nearby villages was
called sunga, "place of the rushes," and was located on a plain near a cienegas. Older
Californians today reminisce about their youth and being able to canoe from Wilmington to the
sand dune area in Redondo, through the remaining systems of wetlands. These marshlands
provided the early California inhabitants with a rich food source of game birds, fish, fresh water
clams and shrimp.
According to one author, "...across much of the land between what is now Los Angeles and the
seaports to the south, except for an occasional cluster of hills, there lay a vast forest, under
grown with almost impenetrable thickets and laced with hidden pools and swamps. Well into the
Spanish era, half-wild cattle and horses found hiding places in this jungle of sycamores, willows,
alders, wild grape vines and bramble bushes."
After floods of 1824-25 and 1832 the greater part of the marshland north of Wilmington and Long
Beach drained away through these defined channels. In the stage coach era travelers wrote of
crossing the plains between San Pedro and Los Angeles . The forest had disappeared.
The Madrona Marsh, although geologically relatively young, is reminiscent of the natural state of
much of the South Bay area. The Marsh preserve is a remnant of once extensive natural systems
that existed along the coastal plain and coastal terraces of Southern California . The preserve is
situated on land that has been in oil production since 1924. This is why it was never developed as
commercial or residential uses.
While the area had gone unnoticed to many there have been some citizens who have been
actively aware of the area for many years, For example, the local Audubon Society has used the
area since 1967 in their annual bird census, and for years bird watchers parked along nearby
streets and watched the area through the fence for their recreation. Biologists teach at El Camino
College have used the site as a resource to botany, zoology and geography classes for over 30
years.
More is available from "FRIENDS OF THE (MADRONA) MARSH"