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LSA ASSOCIATES, INC. JULY 2010 INITIAL STUDYIMITIGATED NEGATIVE DECLARATION FIRST STREET BRIDGE REPLACEMENT PROJECT CITY OF SANTA ANA project area has suitable habitat and/or is within the elevation or distribution range for only some of these species. A total of one plant and 12 animal species have at least low potential for occurrence and are listed below. • Southern tarplant (Centromadia parryi ssp. australis) • Monarch butterfly (Danaus plexippus) • California legless lizard (Anniella pulchra pulchra) • Burrowing owl (Athene cunicularia) • Coopers' hawk (Accipiter cooperii) • Merlin (Falco columbarius) • Allen's hummingbird (Selasphorus sasin) • California horned lark (Eremophila alpestris actia) • Western yellow bat (Lasiurus xanthinus) • Yuma myotis (Myotis yumansis) • Pallid bat (Antrozous pallidus) • Big free -tailed bat (Nyctinomops macrotis) No special-status/special-interest species (i.e., listed species, species proposed for listing, candidate species, or species of interest) were observed or otherwise detected on site at the time of the site visits. Most potentially occurring species are either not expected or have a low probability of occurrence, but two bird species have low -moderate occurrence probability. Marginally suitable habitat exists within the project limits for foraging and nesting Cooper's hawk (Accipiter cooperii), a California Species of Special Concern species. Similarly, marginally suitable habitat exists within the project limits for foraging and nesting Allen's hummingbird (Selasphorus Basin), a Special Animal. Although these species were not observed during the surveys, it is likely that these species occur occasionally within and near the site. In addition, the bat species may be affected by loss of roosting habitat if bats are found to be day -roosting in the bridge structure. Overall, the project area is highly developed and no signs of special status/special interest animal species were observed. All native nesting birds are protected by the federal Migratory Bird Treaty Act (MBTA). The proposed project is required to comply with the MBTA which prohibits disturbing or destroying active nests. Project implementation must be accomplished in a manner that avoids impacts to active nests during the breeding season. As documented in Mitigation Measure BIO -1, avoiding impacts can be accomplished through a variety of means, including restricting brush and tree removal, if required, to periods outside the avian nesting season (February 15 through August 15) or through performance of nesting bird surveys prior to clearing when clearing occurs during the nesting season. With implementation of Mitigation Measure BIO -1, potentially significant impacts to nesting birds would be reduced to a level considered less than significant. Mitigation Measure 07/25/10 «PA\DMJ0701\MND\4.0 Environmental Analysis.doe 411i, ff* 4-11