Dredging:

1
Dredging From Spoils to Beneficial Reuse

,
2
(No Transcript)
3

• In-Bay Sites

4
(No Transcript)
5
Mounding at the Alcatraz site
6
Alcatraz
7
LTMS Agencies San Francisco Bay Conservation and
Development Commission San Francisco Bay
RWQCB State Water Resource Control Board U.S.
Environmental Protection Agency U.S. Army Corps
of Engineers
8

• LTMS Goals
• Maintain channels necessary for navigation
• eliminate unnecessary dredging
• Facilitate environmentally economically
• sound disposal
• Maximize reuse of dredged material
• Establish cooperative permitting framework

9
The Plan Minimize in-Bay Disposal Maximize
Beneficial Reuse
Percent of all Disposal
10
How to Get There? 12-Year Transition
Period Reduces in-Bay Disposal Systematically
11

• Dredged Material Management Office
• Provides a single application form
• Provides a single point of contact
• Considers all suitability analyses
• Establishes cooperative permitting framework

12
(No Transcript)
13

• DRAFT
• LONG TERM
• MANAGEMENT STRATEGY
• MANAGEMENT PLAN
• June, 2000

14
(No Transcript)
15
Deep Ocean Disposal Site
16
(No Transcript)
17
(No Transcript)
18
(No Transcript)
19
(No Transcript)
20
(No Transcript)
21
(No Transcript)
22
Montezuma
23
(No Transcript)
24
(No Transcript)
25
(No Transcript)
26
(No Transcript)
27
How Are We Doing? The Good News In 2007 we were
close to the LTMS goals.
28
How Are We Doing? The Bad News Without the
Oakland -50 Deepening Project there was little
reuse.
29
How Are We Doing? In-Bay disposal remained below
limits For each site and for the Bay overall
30
How Are We Doing? In-Bay disposal remained
below Monthly volume limits at each site as well
31
How Are We Doing? Beneficial reuse had the
greatest volume overall - Again, mainly from the
-50 Project
32
Other Statistics New work dredging slightly
exceeded Maintenance dredging in 2007
33
Other Statistics In 2007, almost all Bay area
dredged material was Suitable for Unconfined
Aquatic Disposal
34
Other Statistics 2007 was a successful year
overall for working in Environmental Work Windows
35
The LTMS Transition On Track

• In-Bay Disposal
• Significantly reduced disposal limits have been
  met every year so far
• Ocean Disposal
• Over 15 million cy has been diverted from in-Bay
  disposal to date
• Ocean disposal remains a long-term safety valve
• Beach Nourishment
• 1 million cy sand placed nearshore for Ocean
  Beach demo project
• Considering proposal for long-term use
• Beneficial Reuse No Longer Spoils
• Over 15 million cy has already been reused
• Current capacity for over 15 million cy more
• Capacity soon for at least another 17 million cy

36
New Challenges

• Environmental Work Windows
• Rehandling Facility for Chemically Challenged
  Material
• Aquatic Transfer Facility
• Sediment Management

37

• Hamilton Wetlands
• Oaklands Deepening Project
• Corps Maintenance Projects

38

• Hamilton Offloader 4 to 6 hours per barge

39
Aquatic Transfer Facility

• Approximately 60 acre footprint
• Accepts all dredge scows and hoppers
• Can stockpile dredged sediment
• (2.2 mcy capacity)

40
Proposed Aquatic Transfer Facility
41
Sediment Management

• What is it and isnt LTMS whatever it is?

42
Erosion (blue) and Accretion (red) in San Pablo
Bay
43

• Insert jaffe Hg

44
(No Transcript)
45
1849
2100
46
(No Transcript)
47
(No Transcript)
48
(No Transcript)
49
(No Transcript)
50
Whats Needed

• Document and Integrate Existing Knowledge
• Establish Management Priorities
• Foster Focused Research
• Implement a RSM strategy

51
Conclusions

• LTMS is Working
• Voluntary, collaborative approach has paid off
• Continued Funding and Support Needed
• Too support use of beneficial reuse
• To continue studies on Work Windows and other
  needed topics
• Regional Sediment Management
• To address sea level rise and other systemic
  changes

52
(No Transcript)