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RIVTOW STRAITS LIMITED PROJECT NO. 75021-1

PORTLAND CANAL MARINE DEVELOPMENT

ESTIMATE OF COST

CASE NO. 1 - TWO FEET OF SETTLEMENT

1, Dredging, Fill and Rip Rap

Heavy rip rap 16,100 cy @ $7.00 5 rele; 700-

Light rip rap 4,700 cy@ 5.50 25,7006

Filter material 12,300 cy@ 3.60 44,300.

Silt removal (dredging) 22,000 cy@ 2.50 55,000.

* Dredging for fill material 362,000 cy@ 2.50 905,000.
** Additional Cost for placing

fill by mobile equipment 236,300 cy@ 1.25 295,400.

Sub-Total $ 15438, 300:
2. Trestle
Piles 3,100 LF @ $9.00 $ 27,900.
Timber 16 M @ $ 1,000.00 16,000.
Sub-Total $ 43,900.
3. Dolphins 4 @ $ 12,500. $ 50,000.
4, Ramp
Timber decking 8.0 MBFM @ $900. $ 74200 «
Steel ramp 72,000 Ibs. @ 1.20 87,000.
Steel float 17,000 Ibs. @ 1.20 20,300.
Winch, etc. 6,500.
Sub-Total $224 2000.

Contingencies and Engineering

ESTIMATED TOTAL COST

* 19% of 362,000 cy = 69,000 cy is unusable silt.

362,000 cy ~- 69,000 cy = 293,000 cy of dredged material used for fill.
Total silt dumped at sea = 22,000 + 69,000 = 91,000 cy.

Rk

$653,200.

160,800.
$ 1,814,000.

If pumping is permitted by the Fisheries Department, this cost would be deleted.