Federal Clean Water Act

Monitoring and assessments completed statewideStandards not met?

Section 303 (d) requires placing the water body on the “Impaired Waters List”

MN Clean Water Legacy Act

Goals

Identify all

Impaired Waters

Submit TMDLs to EPA on Time

Comply with the Federal Clean

Water Act

Develop a Reasonable Time-Frame for

Restoration

Provide Technical and Financial Assistance

Restore water quality and “De-list” Waters

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 ----------

Collect new water quality

data

Analyze WQ data

----------

Define water quality

problem

Modeling

----------

Develop allocation formula

Collect new watershed

data

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 sourcesMargin of Safety = to account for potential scientific errorReserve capacity = set aside for future development

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

TMDL study process continued

March 2008 – September 2008

• 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

Water monitoring

GIS and WEPP model Physical channel

Completed BMPs

Poplar TMDL possible next stepsPoplar TMDL possible next steps

Complete TMDL with data as isComplete TMDL with data as is

Enhance data and write TMDLEnhance data and write TMDL

Delay TMDL until turbidity standard evaluation/revisionDelay TMDL until turbidity standard evaluation/revision

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