19-0918_KUNO'S GRADING, INC._Staff Memo 09/18/19
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1776 ill
TO: Steve May, P.E., Public Works and Utilities Directorj(44
FROM: Eric Bauman, Assistant Utilities Director
Prepared by: Vanessa Paneto, Utilities Engineer
SUBJECT: Removal of Accumulated Landslide Debris from the Retention Basin for the
Avenida Placida Landslide Area
Description: The ancient Placida landslide, continues to sluff off material,which rain and
gravity carries down slope and into the Placida retention basin. The
landslide is located west of the San Juan Hills Estates residential
development,just above Avenida Placida.The consulting geologist Lawson
Geotechnical Consulting (LGC) recommends continued monitoring of the
landslide and removal of the debris when it fills the retention basin. The
basin is at a full level, leaving only 1 — 2 foot of retention and desilting
volume in the basin;with the net result of silting water going directly into the
storm drain system; as the remaining catchment volume fills up during the
expected winter rains. Staff recommends removal of the landslide debris
from the retention basin, along with the installation of erosion control in the
denuded hillside just above the basin, before the upcoming rainy season.
Staff has solicited cost proposals to remove some 570 CY of material from
the basin, and install 1,400 LF of sterile rice rolls. Staff solicited proposals
from five contractors, and received proposals from two. Staff recommends
that the City Manager approve a letter agreement with Kuno's Grading Inc.
for the Placida Spoils Removal project in the amount not to exceed
$36,060.
Location: Avenida Placida De-Silting Basin
Project Cost: $36,060
Funding Source: 01-83723-64116-00000-220
Proposals: Competitive Proposals: (all include 10% contingency)
Proposals: Kuno's Grading Inc. =$36,060; Philbin Construction=$39,895;
Goodwin Enterprises Inc. = No Bid; Post Company Grading Contractors=
No Bid; Coastal General Engineering Contractors = No Bid
Staff Analysis&Recommendation: Staff recommends that the City Manager approve a letter
agreement with Kuno's Grading in the amount of$36,060 to remove spoils from the Avenida
Placida Desilting Basin.