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HomeMy WebLinkAbout3901; FIRE STATION 6; SITE OBSERVATION REPORT; 2007-08-07DUDEK CORPORATE OFFICE 605 THIRD STREET EFJCINITAS. CALIFORNIA 92024 I 760.942.5147 1 800.450.1818 F 760.632.0164 SITE OBSERVATION REPORT Project: Carlsbad Fire Station No. 6 Report No.: Job No.: 5225-01 Owner City of Carlsbad Date 08107/07 Time 0830-0930 hrs Project Manager: Contractor: Edge Construction Manager: Jason Linsdau Biologist(s): Kam Mud S M T I W I I I F I S Day x Weather sunny cloudy overcast rain X <55 55-70 70-85 > 85 ,11 Temp. X Dudek biologist Kam Muri met on-site with construction manager Jason Linsdau to review the extent of disturbance to habitat areas that occurred when the contractor's equipment rental operator delivered a D6 bulldozer to the site on Saturday, August 4, 2007. Authorized access to the project site is via the old Rancho Santa Fe Road from Cadencia Street. However, the rental equipment operator failed to notify the contractor to gain access (access to old Rancho Santa Fe Road from Cadencia Street is via a locked gate) to deliver the bulldozer and accessed the site from Rancho Santa Fe Road instead by traversing the existing habitat area. A D6 bulldozer was tracked across existing habitat areas to the south of the project site from the south-bound side of Rancho Santa Fe Road. The dozer tracks measure approximately 2 feet wide and are spaced approximately 4-5 feet apart. The dozer was driven a length of approximately 350 feet from Rancho Santa Fe Road to the southwest corner of the project site. .. The affected habitat area consists of disturbed valley needlegrass grassland dominated by native perennial needlegrass (Nassella spp.) and a large component of non-native species including wild oat (Avena fatua), foxtail chess (Bromus madritensis ssp. rubens) and filaree (Erodium spp.). Other native species in the area include deerweed (Lotus scoparius), California buckwheat (Eriogonum fasciculatum) and California sage (Artemisia californica) (Figure 1) A large portion of the affected habitat area consists of a rocky/cobbly substrate and limited the extent of ground disturbance (Figure 2). Other areas are generally sparsely vegetated with dehiscent grasses and forbs or consist mostly of bare ground. Surface disturbance from the bulldozer tread is visible in the sparsely vegetated or bare areas, but is limited to the upper 1-2 inches of soil (Figure 3). A few Nassella tussocks were driven over, but significant ground compaction does not appear to have resulted.. Attachments: Figures 1-3 Jason Linsdau, Dudek Signed Doug Gettinger, Dudek . Kam Mud, Biologist Dudek I)UDEK CORPORATE OFFICE 606 11-11W STREET ENCINITAS, CALIFORNIA 92024 I 760.942.6147 1 800.4601818 F 760632.0164 -. - .',• .,..: r- .. • ,. - - ¶.r — - -- -. ••.I 1.' -. -T t'' ..—.;. fir - - . Figure 1. Looking west across disturbed valley needlegrass grassland area affected by the bulldozer tracks. Figure 2. Looking west across rocky/cobbly portion of habitat. Ground disturbance from the bulldozer tracks was limited in this area. Figure 3. Looking west toward the southwest corner of the project site. Photo shows the ground disturbance evident in the bare or sparsely vegetated areas. The majority of the plant cover consists of dehiscent non- native annual grasses and forbs including foxtail chess, wild oat, and filaree.