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DAYTON & KNIGHT LTD.

Consulting Engineers

PG CLYOO AVENUE 3S E57 VANCOUVER BRITISH COLUMBIA CANADA "ELEPHONF. (6041 922.3 3
MAILING ADDRESS 213 BOX 91757. WEST VANCOUVER BRITISH COLUMBIA, CANADA V7V 3N9

September 4, 1990

‘ir. Igor Zahynacz, P.Eng.
City Engineer

City of Port Coquitlam
2272 McAllister Avenue
Port Coquitlam, B.C.

V3C 248

Attention: afr, Bussell Mammei, A.Sc.T.

Dear Sirs:

Reference: City of Port Coquitlam
Contract No. 21.15.18
Construction Services for
Handley Crescent Sewage Lift Station

and Emergency Storag eTank

As requested on August 31, 1990,

constructing a gravity sewer lin g Handley Crescent Pump
Station to the Freemont Pump Station. This option would eliminate the necessity of
constructing a new Handley Crescent Pump Station and the City would only need to maintain
a single pump station instead of two stations to service these areas.

We offer the following comments for your consideration:

1.0 Gravity Sewer between Handley Pump Station d Freemont Pum

|
The first upstream manhole into the existing Handley Pump Station is MH 65-3. The
inlet invert at MH 65-3 is 1,00 m elevation and the outlet invert is -1.20 m elevation.

The distance between MIE 65-3 to the existing Freemont Pump Station is about 5265
metres,

The existing Freemont Pump Station consists of two cells. Duplex submersible Flygt
bumps are located in one of the cells. A 300 mm ¢ capped stub at -2.20 m elevation is
provided in the second cell.

The available grade between the two stations is 1.0 metres if a gravity line is
constructed from MH 65.3 and connected tc the 300 mm ¢ stub at the Freemont Pump
Station.

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