returns to Alhambra Creek beaver pond 2008 |right returns to Alhambra Creek beaver pond 2009 |left eating first recorded
tule perch in Alhambra Creek |right s return to beaver pond December 2010 |left eating fish above Alhambra Creek beaver pond |right In late 2006,
Alhambra Creek, which runs through the city of Martinez, was adopted by two beavers. The beavers built a
dam 30 feet wide and at one time 6 feet high, and chewed through half the willows and other creekside landscaping the city planted as part of its 9.7 million 1999 flood-improvement project (after a flood in 1997). In November 2007, the city declared that the risk of flooding from the dam necessitated removal of the beavers. Since the
California Department of Fish and Game (DFG) does not allow relocation, extermination was the only solution. Residents voiced objections, prompting a beaver vigil and rally, as well as local media interest. Within three days of the announcement of the decision to exterminate the beavers, downtown Martinez was invaded by news cameras and curious spectators. Because of the public outcry, the city obtained an exception from DFG, who pledged to pay for their successful relocation. This 11th-hour decision relieved much of the tension, but residents continued to press the city to allow the beavers to stay. In a heavily attended city council meeting, the city was alternately praised for gaining the DFG exception and chided for not researching effective flood control measures. Concerns of downtown shopkeepers were raised, but strategies for flow management were mentioned by most. Offers of help came from the
Sierra Club, the
Humane Society, the Superintendent of schools and many private residents. After this meeting, Mayor Robert Schroder formed a subcommittee dedicated to the beavers. The city hired Skip Lisle of Beaver Deceivers in Vermont to install a
flow device. Resolution included installing a pipe through the beaver dam so that the pond's water level could not become excessive. The flow device, as of 2013, was controlling the water level well. A
keystone species, the beaver have transformed Alhambra Creek from a trickle into multiple dams and beaver ponds, which in turn, has led to the return of
steelhead trout (
Oncorhynchus mykiss) and
river otter (
Lontra canadensis) in 2008, and
mink (
Neovison vison) in 2009. Examples of the impact of the beaver as a
keystone species in 2010, include a
green heron (
Butorides virescens) catching a
tule perch (
Hysterocarpus traskii traskii), the first recorded sighting of the perch in Alhambra Creek, and the December arrival of a pair of
hooded mergansers (
Lophodytes cucullatus) (see photos). The beaver parents have produced babies every year since their 2006 arrival. In November, 2009 the Martinez City Council approved the placement of an 81-tile wildlife mural on the Escobar Street bridge. The mural was created by schoolchildren and donated by
Worth a Dam to memorialize the beavers and other fauna in Alhambra Creek. In June, 2010, after birthing and successfully weaning triplets that year (and quadruplets the previous three years), "Mom Beaver" died of infection caused by a broken tooth, as confirmed by
necropsy. In 2011, a new adult female arrived at the creek and has given birth to three beavers. Flooding, following heavy rains, washed away the beaver lodge and all four dams on Alhambra Creek in March 2011 In September, 2011, Martinez officials ordered Mario Alfaro, a local artist commissioned to paint an outdoor mural celebrating the heritage of the city, to paint over the depiction of a beaver he had included in his panorama. He complied and also painted over his own name in apparent protest. In 2014, the beaver population of the creek was seven. From 2006 to 2014, a total of 22 beavers lived in the creek at various times; of these, 8 died, 7 are still living in the creek, and the fate of the other 7 is unknown. From 2008 to 2025, there has been an annual Beaver Festival in Martinez. ==History==