CALIFORNIA’S FIRST SUCCESSFUL NATIVE HABITAT RESTORATION ON A CLOSED LANDFILL CELEBRATES 20TH ANNIVERSARY
Twenty years ago, the Transportation Corridor Agencies (TCA) made history when they planted 122 acres of coastal sage scrub on the former Coyote Canyon Landfill in Newport Beach, Calif. It was the first time that native habitat for an endangered species had ever been planted on a closed landfill. Today, it is a thriving habitat that supports native wildlife and requires no maintenance.
“Coyote Canyon proves to everyone that habitat restoration that is carefully planned and flawlessly executed can produce great results. It truly is one of the great environmental success stories in Orange County,” said Rush Hill, mayor of Newport Beach and chairman of the San Joaquin Hills Transportation Corridor Agency.
Central Orange County’s solid waste was disposed of at the Coyote Canyon Landfill for 27 years (1963 to 1990). During that time, more than 60 million cubic yards of waste were buried on approximately 395 acres. Since 1982, the gas produced by the decomposing waste has been fueling electricity production and currently generates roughly seven megawatts of power, supplying electricity for at least 6,000 homes for 32 years.
When it closed in 1990, Coyote Canyon Landfill’s closure plan was the first in the nation to include specifications to create habitat for a federally-listed bird species, the California gnatcatcher. The landfill was designated as a special linkage for birds and animals between the San Joaquin Hills and Upper Newport Bay in the Nature Reserve of Orange County’s Natural Community Conservation Plan.
“TCA spearheaded the restoration of the Coyote Canyon Landfill as mitigation for construction of the 73 Toll Road and because it is a critical part of a comprehensive plan to provide a wildlife link from the Back Bay to the San Joaquin Hills,” added Hill. “The goal was to establish a resilient habitat that needed no maintenance after initial establishment.”
Coastal sage scrub — a low-growing, aromatic and drought-deciduous shrub found in coastal California — developed across the landfill after seeding in the fall of 1994. Because coastal sage scrub includes deep-rooting plants, four and a half feet of soil was added on top of the Coyote Canyon Landfill to accommodate the habitat. Soil monitoring was conducted to ensure the native plants’ moisture and roots did not negatively affect the landfill’s clay cap and gas recovery system. The monitoring and resulting reports were the first demonstration in the southwest U.S. that native vegetation could be planted and maintained without compromising a landfill closure cover or gas recovery system.
Listed as “Threatened” by the federal government in 1993, the California gnatcatcher is a small, non-migratory bird that frequents dense coastal sage scrub. The first California gnatcatcher pair arrived at the Coyote Canyon Landfill ahead of schedule — just two years after the habitat was planted. By 1999, the site’s fifth year, fifteen pairs of California gnatcatchers were successfully breeding in the habitat; 58 percent produced one brood successfully and 33 percent successfully produced two broods. These percentages were comparable to other populations in the region and the Coyote Canyon Landfill habitat was deemed acceptable as mitigation for the California gnatcatcher.
The coastal sage scrub habitat has met all federal permit requirements and the performance standards established by the Biological Opinion issued by the U.S. Fish and Wildlife Service for the 73 Toll Road.
TCA is comprised of two joint powers authorities formed by the California legislature in 1986 to plan, finance, construct and operate Orange County’s 67-mile public toll road system in the most environmentally sensitive way possible.
TCA has conserved and restored 15 locations in Orange County. Hundreds of birds and animals – including the California gnatcatcher – have found a safe home on TCA’s more than 2,100 acres of coastal sage scrub, wetlands, riparian and salt-water marsh. At least 75 baby gnatcatchers, more than 40 species of birds, five species of rodents, 13 invertebrates and larger mammals such as coyote, bobcat and mountain lions utilize TCA’s habitat mitigation areas.
Since 1996, TCA has been a proud participant and active contributor to the Central/Coastal Natural Community Conservation Plan (NCCP), a reserve created to set aside 38,783 acres of prime habitat in Orange County for 42 individual species. During the three years it took to create the plan, TCA contributed its mitigation sites to the reserve and provided $6.6 million of a $10 million endowment, which funds the ongoing management of the reserve. The goal of the NCCP is to conserve native animal and plant species while continuing to allow appropriate development and growth. An estimated 699 acres of TCA’s mitigation areas are included within the reserve and the agencies plan to continue participation through ongoing oversight of the preserved lands.
You’re invited to The Toll Roads’ highly-anticipated 14th Annual Spring Tours Series. The 2014 Spring Tours celebrate the 20th anniversary of the Coyote Canyon Landfill Mitigation Site.
Participants will experience the natural beauty of Orange County on guided walks through land set aside and protected with the construction of the 73, 133, 241 and 261 Toll Roads.
Led by the restoration specialist and biologist who has spent the last two decades restoring the sites to their native habitat and contributing to The Toll Roads’ award-winning environmental programs, this year’s tours focus on the comprehensive efforts and commitment to environmental conservation and restoration, and provide an exclusive glimpse into special areas of Orange County that few have ever seen.
In addition to its guided nature walks, this year The Toll Roads will host a special 20th Anniversary Community Expo to mark the successful restoration of the closed landfill. The expo is free, family-friendly and open to the public.
Bonita Creek – May 3 – Restoration & Bird Watching Tour: 7:30 a.m. to 10:30 a.m.
The 21-acre Bonita Creek restoration area is part of the main wildlife link from Upper Newport Bay to the San Joaquin Hills. It was restored with the construction of the 73 Toll Road from a narrow rip-rap lined ditch and underground culverts to a viable riparian habitat rich with wildlife. This easy, three-mile guided walkwill be primarily on a paved path and along the San Diego Creek to a restored saltwater marsh. It will focus on plants and the methods used to restore the creek and riparian habitat. Bird watchers will see wetland and coastal sage scrub bird species and binoculars are highly recommended. The tour will be led by a restoration specialist and an avian biologist and is designed for participants over the age of 12.
Coyote Canyon – May 17 – Guided Walk: 7:30 a.m. to 9:30 a.m.
Come and join as The Toll Roads celebrate the 20th anniversary of the Coyote Canyon Landfill Mitigation Site and its spectacular environmental achievements as the nation’s first native habitat for the protection of a federally-listed species to be implemented on a closed landfill. This moderate, five-mile guided walkthrough restoration areas on the landfill allows the public to see the natural restoration firsthand. Participants will learn about the innovative revegetation techniques that successfully established more than 122 acres of native, drought tolerant habitat.
Space on the guided walks is limited; call (949) 754-3405 or email email@example.com to sign up.
Coyote Canyon – May 17 – 9:30 a.m. to 2 p.m.
The Toll Roads are joining with the County of Orange, the City of Newport Beach and other partners to host a free, family-friendly public expo to celebrate two decades of environmental excellence. The free open house expo is open to all and includes fun educational booths and discussions on the science, technology, engineering, arts and math (STEAM) used to operate this landfill during its post-closure process, including multi-use designs for gas recovery and native habitat restoration.
Directions: From State Route 73: Exit Newport Coast Drive and head south past Sage Hill High School. Turn right at the traffic signal to arrive at the destination. From Pacific Coast Highway: Take PCH to Newport Coast Drive and make a legal U-turn at Turtle Crest Drive. Pass Sage Hill High School and make a right at the traffic signal to arrive at the destination.