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Water: Total Maximum Daily Loads (303d)

Total Maximum Daily Loads (TMDLs) at Work

TMDLs at Work"TMDLs at Work" is a collection of stories to share the potential benefits of Clean Water Act section 303(d) tools for protecting, maintaining and restoring the nation's water quality. Examples highlight success of Impaired Waters Listing and Total Maximum Daily Load Program tools in many forms, ranging from stakeholder partnerships and public involvement (e.g., Lynnhaven River), to partial restoration (e.g., Carrier Creek, see photos below) and full attainment of water quality standards (e.g., Middle Cuyahoga River).

Photo of Carrier Creek
Note erosion of historic dredge spoils and poor instream habitat
Photo of creek bank and Carrier Creek
Note shallow, linear stream channel and lack of instream habitat features
Photo of Carrier Creek
Photo of Carrier Creek
Restored stream meanders
Photo of creek bank and Carrier Creek

BEFORE: Changes in the amount of impervious surfaces within the communities surrounding Carrier Creek have led to increases in urban runoff, which affects both the quality and the quantity of stormwater conveyed by Carrier Creek.  This figure illustrates the appearance of Carrier Creek [prior to installation of best management practices (BMPs)] due to erosion and straightening that affect in-stream habitat.

AFTER: The Carrier Creek project team used numerous in-stream structures (e.g. crossvanes, j-hooks and lunkers) to stabilize eroding banks and removed berms to provide greater access of stream flow to the floodplain. This figure shows the improvements to Carrier Creek resulting from the restored stream meanders and the use of crossvanes and j-hooks.

Printable Versions

Within each "TMDLs at Work" story, you will find "printable version" links which provide both a basic description ("sound byte" version of about two pages) and an in-depth description ("technical" version of about four pages) in PDF format.

Find TMDLs at Work by:


New York

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Cause of Impairment

Phosphorus Sediment
Stormwater/Impervious cover


Non-government organizations State agencies Universities

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Carrier Creek (Michigan)
Deer Creek(Utah)
Diamond Lake (Oregon)
Eagleville Brook (Connecticut)
Fremont Lake #20 (Nebraska)

Long Island Sound (New York, Connecticut)
Lynnhaven River (Virginia)
Middle Cuyahoga River (Ohio)
Nutrioso Creek (Arizona)
Peconic Estuary (New York)

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