This document contains programmatic riparian vegetation restoration concepts and guidelines prepared as a component of the Tijuana River Valley Regional Park (TRVRP) Plan and Environmental Impact Report (EIR).
The County of San Diego's Tijuana River Valley Regional Park (TRVRP) is part of the
South County Multiple Species Conservation program (MSCP) and managed by the
County of San Diego Department of Parks and Recreation (DPR) pursuant to
management and monitoring guidelines identified in the MSCP and in the TRVRP Area
Specific Management Directives (ASMDs). A baseline survey conducted in 2005
collected biological data in the Park. This report details results of the monitoring surveys
conducted in 2009, and provides analysis and conclusions relative to habitat conditions
and species-specific management recommendations.
MSCP monitoring guidelines are currently being updated, revised and developed.
Regional monitoring approaches and specific habitat monitoring protocols are being
studied by researchers of San Diego State University (SDSU); animal monitoring
protocols are being drafted by the U.S. Fish and Wildlife Service (USFWS) and U.S.
Geological Survey (USGS), the latter of which is also researching specific monitoring
protocols for sensitive plants. In lieu of the availability of preserve-specific monitoring
protocols, monitoring methods for the 2009 surveys either used established protocols or
draft regional MSCP monitoring protocols adapted for preserve-level monitoring. The
following monitoring surveys were performed in 2009: vegetation communities mapping,
general wildlife, habitat monitoring, herpetological pitfall array, and wildlife
TRVRP consists of a mosaic of native and non-native habitats and agricultural as well as
recreational land uses. The international border fence, a triple fence that was being
constructed at the time of the 2009 monitoring surveys, and associated Boarder Patrol
access roads extend along the top of the southern mesas. The 150 to 300-foot wide
federal easement on the U.S. side along the International Border is excluded from the
County's management mandate. The San Diego County Water Authority is planning the
development of a 60-acre riparian/wetlands mitigation bank in the west-central portion of
TRVRP, immediately south of the Tijuana River floodplain, which the County will
continue to own and manage.
TRVRP is home to a number of sensitive species covered by the City of San Diego's
MSCP and the bird species diversity is high. The slopes along the southern mesas
contain sensitive maritime succulent scrub and southern maritime chaparral occupied by
Funding from the TransNet Environmental Mitigation Program FY 2009 allowed for continued expansion of the program and was called Phase 4. The project was undertaken to enhance and restore prime riparian and mule fat habitats within the Tijuana River Valley through the treatment of invasive, non-native plants and the planting of native species. The project was on public lands, mostly within the County of San Diego's Tijuana River Valley Regional Park. The overall goals of the project were to improve these valuable sites for visitors, to control the spread of invasive plants, and to restore native habitats.