Federal Clean Water Act

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

2
MN Clean Water Legacy Act
Submit TMDLs to EPA on Time
Develop a Reasonable Time-Frame for Restoration
Identify all Impaired Waters
Goals
Provide Technical and Financial Assistance
Comply with the Federal Clean Water Act
Restore water quality and De-list Waters
3
TMDL formula TMDL process
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
Conduct data inventory ---------- Identify
water quality data gaps ---------- Identify
watershed data gaps --------- Determine whether
new data is needed
Develop data collection plans
---------- Collect new water quality data
Analyze WQ data---------- Define water quality
problem
Scope the project
Modeling ---------- Develop allocation formula
Collect new watershed data
4
TMDL study process continued
Public process
Monitoring Plan ---------- Effectiveness to
assess BMPs or other Validation of model or
analytical assumptions --------- Special concerns
Implementation plan ---------- Projects, BMPs to
pursue
Notice to state register Public Hearing
Study forwarded to EPA for approval
---------- Implementation
5
March 2008 September 2008
GIS and WEPP model
Physical channel
Water monitoring

• Final Report
• 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

Completed BMPs
6
One of the first TMDLs for this region, sets a
direction and stakeholder expectations for future
work