HomeMy WebLinkAbout13 - Grand Canal Dredging Project Phase 2 — Award of Contract No. 8171-2 (16H12) - PowerPointGRAND CANAL
DREDG
PROJECT
PHASE 2 —
Park Avenue Bridge to
Bay Front
October 23, 2018
Item No. 13
City Council
October 24, 2018
Grand Canal
❑ 1,485 feet long
C 95 feet wide
❑ Navigable to small vessels + hand launch vessels
❑ Dredging Benefits:
Increase depths
Decrease odor from algae and anaerobic sediment
Improved circulation
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1953
Prior Grand
❑
1962
Cana
❑
1974
Dredging
❑
1985
Projects
Q
1999
❑
2017
(south only)
Background
Phase 1 - Park Avenue Bridge to S. Bay Front
Completed in February 2017
23100 cubic yards
435 linear feet
$379,545 Total
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Background
Phase 2 — Bid #1 Rejected
August 2018
7,300 cubic yards
1,050 linear feet
$1,389,000 (base) + $109,220 (Harbor Island) _ $1,498,220 Total
9
Reason: Limited daily work hours + Limited calendar work days
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u Phase 2 — Re -Bid #2
❑ October 2018
❑ $1,279,250 (base) + $103,820 (Harbor Island) _ $1,383,070 Total
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Harbor Island Dredging -
Additive Item ($103,820)
Q Narrow channel at all tides
❑ Public beach sand migrating bayward
LJStorm drain pipe redirected to assist '
navigation
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Options
1 Award Grand Canal dredging only. Delay Additive Item (Harbor Island)
2. Reject all bids. Delay project indefinitely.
3. Re -bid later.
■ Small to medium dredging market is small — competition few.
■ Mobilization always high.
Considerations:
❑ Favorable tides generally October to February.AD r 3F
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❑ Narrow channel requires careful barge management.��,
❑ Alternate cost-effective options for disposal are minimal. Permitting u _=
challenges — unknown outcome. r141F0p, P
QUESTIONS