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LSA ASSOCIATES, INC. CEQA INITIAL STUDY /MITIGATED NEGATIVE DECLARATION <br /> MARCH 2011 PRLDA STREET PIPE BRIDGES UPGRADE <br /> SAN LEANDRO. CALIFORNIA <br /> ENVIRONMENTAL CHECKLIST <br /> Less Than <br /> Significant <br /> Potentially with Less Than <br /> Significant Mitigation Significant No <br /> Impact Incorporated Impact Impact <br /> I. AESTHETICS. Would the project: <br /> a) Have a substantial adverse effect on a scenic vista? ❑ L • U <br /> b) Substantially damage scenic resources, including, but not Li U • <br /> limited to, trees, rock outcroppings, and historic buildings <br /> within a State scenic highway? <br /> c) Substantially degrade the existing visual character or Li • U U <br /> quality of the site and its surroundings? <br /> d) Create a new source of substantial light or glare which Li ❑ ❑ U <br /> would adversely affect day or nighttime views in the <br /> area? <br /> Affected Environment: <br /> The project site consists of two, southwest - trending, eighteen -inch internal diameter bell -and- spigot <br /> ductile iron sewer pipes crossing over San Leandro Creek. Two steel. Pratt -type, through -truss <br /> bridges support the pipes. While the bridges are of relatively similar geometry with painted steel <br /> plate, angle, and T- section structural members, the bridge to the east (Bridge R) is of riveted <br /> construction and the bridge to the west (Bridge W) is of welded construction. Both bridges span <br /> 80 feet and are approximately 3.5 feet wide and six feet deep. <br /> The creek banks on either end of the bridge are steep and covered in dense vegetation, primarily <br /> blackberry (Rubus sp.) and English ivy (Nedra helix). Portions of the ground surface not covered in <br /> blackberry support non - native annual grasses such as ripgut brome (Bromus diandrtcs). barley <br /> (Hordeum sp.), and wild oats (Avenafatua); and ruderal (i.e., weedy) forbs such as Italian thistle <br /> (Carduus pycnocephalus), cheeseweed (Ma/va parviylora), poison hemlock (Confirm maculatum), <br /> and wild radish (Raphanus saliva). A large, multi - branched arroyo willow (Salix lasiolepis) is present <br /> adjacent to the southeast end of the bridge and its canopy extends over most of the southern bank. <br /> Several smaller arroyo willows grow within the creek channel, as well. Other tree species observed <br /> growing on the creek banks include blue elderberry (Sambucus mexicana) and silver wattle (Acacia <br /> dealbata). <br /> Land uses in the project area are residential housing to the south, west, and north of the project site. <br /> The Union Pacific Railroad tracks lie to the east of the project site. The reach of San Leandro Creek <br /> immediately downstream of the bridges consists of a concrete - lined, trapezoidal flood control <br /> channel. <br /> P:1EGI080110EQA'Prcda_FINAL_IS- MND.doc (03/28/11) I 1 <br />