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Attachment C
Outline for Including Watershed Analyses in DMMP's
Goals:
- To develop an effective long term program for economically
maintaining navigational channel depths in Great Lakes harbors
- To develop sediment management strategies which provide
reliable lowest cost solutions balanced against ecosystem benefits and
related resource utilization
- To establish federal, state, local and private partnerships
which can minimize duplication of efforts and commitment of resources
- To develop a shared vision and common expectation for
future resource needs, transportation and commercial opportunities and
ecological conditions.
Process:
- Assessment
- Identify current sediment loadings by sub-watershed
including source identification with relative contribution
- Project future (20 year) loadings by sub-watershed including source
identification with relative contribution
- Identify both current and future key watersheds and/or sources
- Characterize both current chemical and future
chemical loadings based on trend analyses through computer modeling predictions
- Identify dredging restrictions and disposal restrictions
both current and future based on sediment or critical pollutant loadings
- Analysis
- By reviewing the assessment, determine whether or not
there the key sources or watersheds are controllable
- Assess the costs of controls
- Rank controls based on costs and effectiveness
- Compare sediment/pollutant reduction costs against dredging and disposal
costs over the 20 year planning period
- Develop sediment management program for a 20 year design period based
on costs, effectiveness, viability, institutional concerns and ecological
effects related to each sediment management option or combination of options
Within this analyses, I believe that certain standards would have to be
looked at as tiers of potential actions. For example, no action on tributary
sources, BMP installation to achieve soil loss levels below "T", and BMP
installation to achieve soil loss levels which would preclude "any" future
harbor maintenance dredging and disposal. For each of these options, the
related habitat and species implications, recreational implications and
institutional concerns or impacts should be included.
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