THE CORPORATION OF THE C 0 UJ N C
CITY OF PORT COQUITLAM aes

NOV 3- 1986

MEMORANDUM

TO: City Administrator October 30, 1986
FROM: City Engineer

SUBJECT: Contract for Water and Sewer on Broadway Street -
Public Works Committee October 30, 1986

Recommendation:

"That the Engineer be ed with. option (E)
as described on the attac rt
conventional

industrial

Background and Comments:

The following attachments are included for consideration
with this report:

1. 2A description of five Possible options for completion

of the sanitary sewer project.

2. A comparison of those options listing advantages ‘and
disadvantages of each.

A table comparing the costs for these options, both
inftiatly and over the long run including maintenance.:

Informational materia! on the grinder pump system.

lower than the
a great deal of
difficult pped a number of
times for As a result of a recent
“problem tn correct grade we have
determined + lem is that the soil at
the bottom o is llfting during excavation and fs
resettiing after the pipe has been laid. With the use of
conventional! shoring It is not Possible to correct this
Problem. A Soils Consultant has indicated the need for sheet
piling to be extended below the depth of the trench prior to
excavation to prevent this problem.