Appendix A Natural Environment Study (Minimal Impacts)

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Natural Environment Study (Minimal Impacts) BI0-3 Bat Eviction/Exclusion. To avoid direct mortality of individual bats, humane evictions (if bats are present) and exclusions of roosting bats should be performed under the supervision of a CDFW-approved bat biologist prior to bridge demolition activities. Eviction/exclusion activities should be performed in the fall (September or October) prior to bridge demolition. Exclusion activities may be implemented in one or two phases at the discretion of the qualified bat biologist and in coordination with the Project Design Team. BIO-4 Alternative Bat Roosting Habitat. Alternate bat roosting habitat should be incorporated into the design of the new bridge to replace crevice habitat lost from removal of the existing Fairview Street bridge over the Santa Ana River. The specifications for this replacement habitat should be designed in consultation with a qualified bat biologist. In addition, to avoid potential impacts to bats day roosting in the swallow mud nests at the Fairview Street bridge over the Santa Ana River, the following measure will be implemented: BI0-5 Swallow Nest Removal. If swallow nests are removed to prevent swallows from nesting within the Project Area during construction activities, they should be removed in the fall (i.e., September or October) prior to expected or potential overwintering use by bats, and in a manner that ensures they do not fall to the ground or are otherwise destroyed unless absence of bats is confirmed through inspection by a qualified bat biologist. To minimize any potential indirect impacts to bats foraging and night roosting at the Fairview Street bridge over the Santa Ana River, the following measures will be implemented: BI0-6 Nighttime Lighting During Construction. To minimize temporary indirect impacts during nighttime work for Project construction within 200 ft of the bridge structures, night lighting shall be used only in the area actively being worked on and focused on the direct area of work, and airspace access to and from the roost features of a structure shall not be obstructed except in direct work areas. ................................................................................................................................................ . 44 Fairview Street Improvements from 9th Street to 16th Street and Bridge Replacement Project