tne final design of the Handley Crescent Pump Station was based on building
new Sewage Pump Station beside the old pump station and based on providing
underground detention surge chamber which would accomodate one half hour
peak sewage flow. As shown on the attached correspondence, the total cost
the installation of the Handley Crescent Pump Station is as follows:

Supply of Materials $134 , 391.00
1990 Construction Costs 249,125.00
Engineering Costs 17,730.00

TOTAL COST $401, 246 .00

the main reasons for the substantially higher costs are:
Additional emergency storage was included in the censtruction costs.

It was determined that the bottom portion of the existing pump
station may not last very long due to corrosion.

Excessive dewatering and shoring costs related to the ground
conditions.

As an alternate, the City could consider installing a gravity sewer main from
the existing Handley Crescent Pump Station to the Fremont Pump Station as
described by Dayton & Knight in their letter of September 4, 1990. As the
geotechnical information is not available for the proposed gravity sewer the
estimated construction costs of $414,000.00 (plus engineering, plus dewatering
costs) is a rough estimate at this point.

There are several obvious advantages to having one pump station with good
auxillary power rather than two pump stations based on emergency storage in
case of power outage. Also, there would be a major saving in having only one
pump station to maintain rather than two pump stations.

“79 .
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I.R. Zahynacz, P. Eng.
City Engineer “ -

IRZ:ge

Attachment

Lota ncriiers Gea tor eI ote hie Rae ay