Natural History Journal

If you've been with me through Parts I  and II of this series, where we talked about the arguments against damming and flooding Del Puerto Canyon and then looked at a long list of sensitive species that may be displaced by the project, you may have a few questions. You may be thinking,  with thousands of acres of habitat available in the Coast Ranges, why would the loss of a mere thousand acres matter?  Isn't there plenty of available habitat left for wildlife?  What is the point of this, anyway? Progress is progress,  you say,  water is life, agriculture feeds the Valley (and many, many far-flung regions beyond), so what is the loss of a thousand or so acres of habitat in the grand scheme of things? Yet this has been the story over and over and over again in California, for the last 200 years: the relentless march of "progress," taking all we can possibly take with little regard for the destruction left behind.   Habitat fragmentation has plague...

In Part I , we looked at a few of the reasons the proposed dam at the mouth of Del Puerto Canyon has caused such a great deal of opposition within the local community.  Some of the arguments against the dam include the risk of flooding that a dam failure would present to the city of Patterson, the loss of educational and recreational access to the lower canyon, destruction of Native American cultural sites, and loss of access to sites of geological and paleontological significance. While there are many valid reasons why this canyon should not be flooded, perhaps the most significant to me, as a naturalist, is the loss of wildlife habitat and disruption of wildlife corridors that would follow.   Below are excerpts from the environmental impact report (read the full text  here  and  here ) regarding the specific species of wildlife that have the potential to be displaced by the damming and flooding of Del Puerto Canyon. Regarding terrestrial biological resour...

At the western edge of the Great Central Valley, within Stanislaus County, lies a canyon of cultural, biological and geological significance.  A rift in the earth slicing through the Coast Ranges, the canyon exposes millions of years of geologic history, and shows evidence of being occupied by humans long before European settlers arrived on the scene.  A spring at the heart of the canyon feeds into an intermittent stream, bordered by oasis-like pockets of riparian wetlands, cottonwoods, sycamores and ephemeral pools.  In the spring, grasslands within the canyon are verdant with a luxurious covering of new growth and dotted with annual wildflowers, while steep canyon walls are adorned with hardy chaparral and oak scrub habitat.  In the autumn, western sycamores and Fremont cottonwoods lining the creek put on a color show no less spectacular for its subtleness.   This is, of course, Del Puerto Canyon. And this canyon is in imminent danger of being dammed and ...