Vital Watersheds MILES of CREEKS Herever We Travel on the Landscape, We Are in a Watershed 17 and Whatever We Do Affects a Watershed
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THE OFFICIAL NEWSLETTER OF THE TOWN OF LOS ALTOS HILLS DECEMBER 2014 5 6 8 11 Youth Exploring Choosing Dog Park Commission Mars a School Opens WATERSHEDS BY THE NUMBERS NUMBER OF WATERSHEDS IN LOS ALTOS HILLS 4 NUMBER OF NAMED CREEKS 12 NUMBER OF REGULATORY AGENCIES THAT PROTECT CREEKS 6 Vital Watersheds MILES OF CREEKS herever we travel on the landscape, we are in a watershed 17 and whatever we do affects a watershed. See if you can MINIMUM SETBACK (IN FEET) FROM identify which of the four watersheds in Los Altos Hills you CREEKS IN TOWN W spend time in. Here is a hint: the watersheds are named for the primary 25 creek stem that carries water to the bay: Permanente, Adobe, Barron, and Matadero. Our watersheds include stream types ranging from a paved channel to a mature riparian woodland, and land that supports large areas of natural vegetation as well as urban development. [CONTINUED ON PAGE 2] The better people treat the land within the watershed, the less chance there will be fiscal and social costs associated with pollution and reduced water flows downstream. What is a Watershed? PRIMARY CREEKS IN LOS ALTOS HILLS A watershed is a geographic area usually demarcated by mountains. Water flows SAN FRANCISCO BAY downhill, gradually collecting into tribu- taries that contribute to the main creek PALO ALTO k stem. The watershed may extend from ee ro Cr de k ta ee mountaintops to the mouth of a river; Ma rron Cr it may also contain sub-watersheds for Ba each tributary. It is important to think k k about creeks in terms of their watershed ee ee k k 101 because everything that happens within Adobe Cr ee anente Cr 82 ee the watershed, regardless of location, can rm MTN. Pe VIEW ens Cr impact the creek. A holistic, “watershed,” Cr Deer Felt Lake LOS approach to creeks provides the best Stev ALTOS protection for water quality, vegetation, k ee wildlife, and the human environment. LOS ALTOS 280 Hale Cr HILLS Permanente Creek Why Care About a Watershed? Diversion Channel The shortest answer is that everything accumulates downstream. Although in the broadest sense we are in the watershed of San Francisco Bay and the Pacific Ocean, it is important to follow what is happening upstream. The better people treat the land within the watershed, the less chance there will be fiscal and social costs associated SANTA with pollution and reduced water flows SAN Stevens CLARA Creek downstream. Watersheds also provide MATEO Reservoir COUNTY habitat that benefits both wildlife and COUNTY humans. That is why there are several state and federal agencies that monitor direct impacts to creeks, aside from local 9 governance: the California Regional Water Resources Control Board, the California Department of Fish and control flooding impacts and allow the has seven tributary creeks, and is a Wildlife, the U.S. Army Corps of growth of neighborhoods in Mountain natural channel until near El Camino Engineers, the National Marine Fisheries View and Palo Alto. That dramatically Hospital. Downstream to the bay it Service, and the U.S. Fish and Wildlife changed the dynamics of the watersheds, mostly flows through a paved channel. Service. Any project that directly affects affected the ability of wildlife to connect In the upper watershed, it provides a waterway or the vegetation immedi- to the bay, and reduced the wildlife cold freshwater habitat for fish and ately adjacent to it could be subject to diversity in Los Altos Hills. amphibians; fish spawning habitat; and permits or other authorizations governed supports the California red-legged frog, by these agencies, and stiff fines can be Local Watersheds and Creeks levied for non-compliance. Permanente Creek originates in the Watersheds have also directly influ- Permanente Creek Santa Cruz Mountains near Black enced local history. Adobe Creek, for Mountain and Montebello Ridge. It example, once provided an abundance flows through unincorporated Santa of wildlife and plants for the Ohlone Clara County lands for about five Native American tribe, and as a result miles, then flows through Los Altos there are prehistoric artifacts in that and Mountain View to reach the San watershed that we are now required Francisco Bay. One of its main tribu- to care for. In the past, the water taries is Hale Creek, which is located that flowed in narrow creeks in our south of Foothill College by the Neary hills spread out in the flatter areas Quarry and flows to Magdalena Avenue and changed course annually, so that and across Foothill Expressway into flooding was unpredictable. Within the Los Altos. The Permanente Creek last 75 years most of the creeks were watershed covers 17.3 square miles, channelized downstream in order to 2 Our Town | December 2014 a federally-listed threatened species, in the upper watershed. It is also defined property, they are on track for caring by the Regional Water Quality Control for the watershed. The water quality in Board as impaired by urban pesticides most of the creeks in the Bay Area are (Diazinon, an organophosphate banned compromised by pesticides and trash, from residential use in 2004), selenium, and creeks can also be adversely affected and trash. when water carries more soil than usual Adobe Creek has a rich cultural downstream because vegetation has history, and several shell mounds and Barron Creek been removed (erosion). One property’s burial grounds of the Ohlone people effects are small, but the cumulative have been found along its banks near drainage channels and directed to enter effect with other properties is large. The Moody Road and O’Keefe Lane (see the Adobe Creek near the Palo Alto Flood best way to protect everything down- Wikipedia report on Adobe Creek for Basin. It drains three square miles of the stream is to minimize pesticide use, take more historical information). It starts hills around Town Hall and is the most care of trash or any loose object in one’s near Black Mountain and drains about modified creek in our area; more than yard that could be carried away by water, 11 square miles, flowing as a natural creek 60 percent of the creek channel is paved. and be mindful of vegetation removal through the Hidden Villa Ranch, Foothill When there are heavy storms, the flood and the need for erosion control during College, Redwood Grove and Shoup control basin at Gunn High School construction projects. Park, under Edith Avenue, under Foothill is used to divert Barron Creek flows Expressway, and past the Alta Mesa into Matadero Creek through a bypass Cemetery toward El Camino Real. It is channel. Barron Creek has supported controlled in a concrete-lined channel chorus frogs in the past, but when the from El Camino to the Palo Alto Flood creek flows only with irrigation runoff Basin. It was historically a perennial creek the water contains chloramines, which (it flowed year-round), and was fished frogs cannot tolerate. That effect is diluted with storm water flows. The Matadero Creek watershed includes land in both Los Altos Hills and Palo Alto. Matadero Creek origi- nates near Altamont Road, and flows along Page Mill Road, across Stanford lands to El Camino Real. From there it is channelized and its flow is controlled through Palo Alto to the Palo Alto Flood Basin. It is eight miles long and drains 14 square miles of land. Deer Creek Matadero Creek in Los Altos Hills is a major tributary that starts along Purissima Road near Enjoying Watersheds the Little League fields and captures Several of the creeks in town can be water from portions of Purissima Road enjoyed recreationally. Most of them and Elena Road. Deer Creek flows into are bordered by pathways along some Matadero Creek at Deer Creek Road on Adobe Creek portion of their reach. Many can be Stanford lands. This watershed provides accessed directly for a “creek walk” in habitat for the California red-legged the channel to experience that habitat. for steelhead as recently as the 1970s. frog, a federally-listed threatened species. Refer to the map on the previous page to Steelhead is now a federally-listed threat- identify which creek is in your neighbor- ened species in the San Francisco Bay and Caring for Watersheds hood so that you can be aware of your on the San Mateo coast, and although If residents think about what the rain connection to the watershed, which may a run could potentially be restored with or irrigation can carry away from their also represent a connection to neigh- a lot of work, Adobe Creek does not boring communities and the south bay currently support steelhead. as a whole. Barron Creek originates from the hills around La Paloma Road in Los FUN FACTS Taylor Vanderlip is an environmental consultant Altos Hills and flows along La Paloma, specializing in biological issues. under residential development along • It was possible to fly fish Adobe Fremont Road to St. Francis Drive, Creek for steelhead into the 1970s. where it daylights and flows again as TO LEARN MORE: • Different names for streams are used a natural stream to Arastradero Road, Visit the following websites to across America. Examples are kill, under Foothill Expressway to the flood learn more about local watersheds: run, crick, creek, arroyo, wash. www.valleywater.org/Services/ control basin at Gunn High School, WatershedInformation.aspx, www. and into Bol Park in the Barron Park • Even when a creek bed is dry, it is museumca.org/creeks/MapPA.html. A brochure titled neighborhood. After that the creek is possible that the creek is flowing “Creeks and Riparian Areas” can be found on the town’s website.