Transcript Slide 1

Federal Clean Water Act
Monitoring and assessments completed
statewide
Standards not met?
Section 303 (d) requires placing the water
body on the “Impaired Waters List”
MN Clean Water Legacy Act
Submit TMDLs to
EPA on Time
Develop a Reasonable
Time-Frame for
Restoration
Identify all
Impaired Waters
Goals
Comply with the
Federal Clean
Water Act
Provide Technical and
Financial Assistance
Restore water quality
and “De-list” Waters
LA(s) + WLA(s) + Margin of Safety + Reserve Capacity =
Total Maximum Daily Load
LA = Load allocations from nonpoint sources
WLA = Waste load allocations from point sources
Margin of Safety = to account for potential scientific error
Reserve capacity = set aside for future development
TMDL formula
TMDL process
Scope
the
project
Conduct
data
inventory
---------Identify
water
quality data
gaps
---------Identify
watershed
data gaps
--------Determine
whether
new data is
needed
Develop data
collection
plans
Analyze
WQ data
----------
----------
Collect new
water quality
data
Define
water
quality
problem
Collect new
watershed
data
Modeling
---------Develop
allocation
formula
TMDL study process
Public
process
Monitoring
Plan
Implementation
plan
----------
----------
Effectiveness
to assess
BMPs or other
Projects, BMPs
to pursue
Validation of
model or
analytical
assumptions
--------Special
concerns
continued
Notice to state
register
Public Hearing
Study forwarded to EPA
for approval
---------Implementation
March 2008 – September 2008
• Final Report
Physical channel
GIS and WEPP model
– Closed out /posted
– Reviewed/discussed feedback
comments
• Turbidity Standard
– Internal agency discussion on
standard and value added
work from comments
– Turbidity standard triennial
review
• North Shore comparative
approach – assessing other
streams, finding reference
streams
• Input matters
Water
monitoring
Completed BMPs
Poplar TMDL possible next steps
Complete TMDL with data as is
Enhance data and write TMDL
Delay TMDL until turbidity standard evaluation/revision
One of the first TMDLs for this region, sets a direction
and stakeholder expectations for future work