Port-Wide Sewer System Management Plan(SSMP) - Port of Oakland

Table 9.5 High Priority Improvements Summary
Table 9.5 Port-Wide Sewer System Management Plan
Table 9.5 Port of Oakland
Capital Improv.
Improv. Proposed Length Cost (1),(2)
ID Size (ft) ($) Comments
LS-AB836P Note 3 - $350,000 The discharge pipe for this lift station is separated from the pump due to a
corroded base and is currently supported by a few pieces of lumber. The effluent
pipe shows a significant amount of decay and corrosion.
Pipeline Rehabilitation and Replacement
RR-3 10-in. 900 $193,000 CCTV inspection of the 10-inch diameter sewer underneath the OAK terminal
parking lot revealed several locations with pipeline fractures or voids with visible
soil.
RR-4 4-in. 145 $28,000 In 2009, there was a SSO located near Gate 9, which was released from an
overhead exterior sanitary sewer line when a cleanout was opened to clear a
clog. The sanitary sewer line has been found to lack adequate fall and also
appears to be flat or has reverse grade in certain reaches. Consequently, the line
does not scour well and needs to be cleared periodically. Maintenance is difficult
because the sewer line hangs nine feet in the air and there are no clean outs from
the terminal floor above the line.
To mitigate the issues mentioned above, the Port has planned to replace the
existing 3-inch diameter sewer line with a 4-inch diameter cast iron pipe that
meets minimum slope requirements and has clean-outs every 35 feet for service
from the floor area above.
RR-5 27-in. 1,500 $791,000 CCTV inspection of the 27-inch diameter trunk sewer in Maritime Street south of
7th Street in the harbor area revealed severe structural deficiencies that should
be addressed as a very high priority condition upgrade project. In several
locations throughout the pipeline segment, the pipeline has experienced interior
lining deterioration to a point where the structural reinforcing steel has become
visible.
RR-5A
Notes:
27/48-in. 200 $657,000 Improvement RR-5 will require casing be installed under the railroad tracks.
Project RR-5A represents the costs of installing the casing.
1. Baseline Construction Cost plus 25% to account for unforeseen events and unknown conditions.
2. Estimated Construction Cost plus 30% to cover other costs including Engineering, Construction Management, and Project Administration.
3. To account for site specific factors that are beyond the scope of this planning level study, the required capacity for the Port's small lift stations
3. should be determined in the preliminary design phase of each rehabilitation/replacement project.