Mitigation Monitoring and Reporting Matrix (continued)

Significant Impact Being Mitigated

Mitigation Measure

Responsibility for Implementation

Enforcement Responsibility

Monitoring Responsibility/ Frequency

Actions Indicating Compliance

Biological Resources (cont.)

1. Pre-construction surveys shall be conducted during the period of identification for larval host plants and butterfly larvae in the flowering and/or breeding season immediately prior to trail construction or any other work scheduled to occur on Icehouse Hill.
2. Trail construction on Icehouse Hill shall avoid populations of larval host plants.
3. All trails, or alternately, sensitive habitats, shall be fenced to minimize the establishment of “informal” trails through habitats supporting special-status plants.
4. Dogs shall be allowed on Icehouse Hill trails on leash only.
5. Interpretative signage shall be posted at trailheads explaining the presence of endangered butterflies and/or their habitat and the importance of preserving Icehouse Hill as habitat for endangered species.
6. Establishment of seasonal restrictions or a period during which horses would be permitted to occur on Ice House Hill associated with passive recreation areas shall be implemented in a manner that coordinates best with the use pattern of special status butterflies, under consultation with a Lepidopterist.

Grassland habitat on Icehouse Hill shall be restored and enhanced to maintain and expand healthy populations of butterfly host plants. This shall include regular and ongoing management of non-native invasive species, such as French broom and fennel, as well as revegetation with native grassland species and establishment of new populations of butterfly host plants for callippe silverspot and Mission blue butterfly species, particularly lupine host species and Veolia species.

These efforts shall be planned in coordination with similar SBMHCP efforts and according to the butterfly habitat restoration and vegetation management guidelines that have been established for the SBMHCP (San Mateo County, 2007). The criteria for successful implementation of habitat restoration shall be no loss of butterfly habitat and at least 50 percent cover (includes at least two of the lupine species used by butterflies) in restored areas after five years.

The conditions of approval shall also require implementation  of  Mitigation Measure 4.C-1c, including  avoidance of larval host plants, fencing to minimize the establishment of “informal” trails, restrictions on off-leach pets, provision of interpretive signage, seasonal restrictions on horses, provisions for ongoing maintenance of trails and associated features, and habitat restoration and enhancement.

The final report of f pre- construction surveys required by Mitigation Measure 4.C-1c shall:

1. Update the reports undertaken pursuant to Mitigation Measures 4.C- 1a and 4.C-1b;
2. Determine whether any modification to earlier findings, habitat mapping, and trail routing/design are needed.