Work includes 32134 CY excavation; 1607 CY unsuitable material excavation; 13 CY loose riprap; 28000 SF infiltration facilities (retention basin); 3 CY culvert crossing cdf (flowable) backfill; 35 LF 30" storm drain/culvert/gravity irrigation pipe, class iii reinforced concrete (rcp); 3340 LF 12" storm drain/culvert/gravity irrigation pipe, class c900 pvc; 1678 lf 18" storm drain/culvert/gravity irrigation pipe, class c905 pvc; 57 LF 30" storm drain/culvert/gravity irrigation pipe, class c905 pvc; 305 LF irrigation ditch size 4' wide x 3' deep; 41 CY concrete (cast-in-place) - headwall; 8900 SY concrete sidewalks, thickness 5".