Unified Interior Regions

Region 3: Great Lakes

Great Lakes Restoration Initiative

Great Lakes Restoration Initiative

For more information on the Great Lakes and work being done, check out the Great Lakes Restoration Initiative website here! 

GLRI

USGS Science Centers in the Great Lakes Region

For more information on what each center is doing in the Great Lakes, please follow the links below! 

Great Lakes Science Center

Ohio-Kentucky-Indiana Water Science Center

Upper Midwest Water Science Center

Upper Midwest Environmental Sciences Center

National Wildlife Health Center

Regions L2 Landing Page Tabs

Filter Total Items: 570
Eastern American Toad
December 31, 2000

Eastern American Toad (Bufo americanus americanus)

The sound of an Eastern American toad (Bufo americanus americanus) call.

USGS staff making a boat flood measurement on the Ohio River at Cannelton, IN
December 31, 1969

flood measurement on the Ohio River at Cannelton, IN

USGS staff making a boat flood measurement on the Ohio River at Cannelton, IN 

Sealcoated and unsealcoated pavement
January 1, 0000

Black sealcoat contrasts with unsealcoated asphalt on parking lot

Sealcoat, marketed to protect and beautify the underlying asphalt, sharply contrasts here with the light gray of unsealcoated asphalt pavement. Read more about coal-tar-based sealcoat and PAHs here.

Gray patches show where sealcoat has worn off
January 1, 0000

Sealcoat wear indicated by bare asphalt patches

The abrasive action of car tires and snow plows causes sealcoat to wear off. Here, light-colored patches indicate where the sealcoat has worn off and the underlying asphalt shows through. Applicators generally recommend reapplication every 3 to 5 years. Read more about coal-tar-based sealcoat and PAHs here.

Black sealcoated pavement contrasts with unsealed pavement
January 1, 0000

Black newly applied sealcoat contrasts with unsealed asphalt

Newly applied coal-tar-based sealcoat is dark black, sharply contrasting with the unsealed asphalt parking lot below. Coal-tar-based sealcoat is a potent source of polycyclic aromatic hydrocarbons (PAHs)

Worn sealcoated pavement around storm drain
January 1, 0000

Worn sealcoat around a storm drain.

Coal-tar-based sealcoat, a potent source of polycyclic aromatic hydrocarbons (PAHs), abrades into fine particles with time.  Here, runoff containing abraded particles goes down a storm drain and is delivered to a nearby lake. Read more about coal-tar-based sealcoat and PAHs here.

Worn sealcoat around a storm drain.
January 1, 0000

Worn sealcoat in Milwaukee, WI

Coal-tar-based sealcoat, a potent source of polycyclic aromatic hydrocarbons (PAHs), abrades into fine particles with time.  Here, runoff containing abraded particles goes down a storm drain and is delivered to a nearby lake. Read more about coal-tar-based sealcoat and PAHs here.

Canada geese in large numbers can contribute fecal contamination to waterbodies
January 1, 0000

Canada geese contribute fecal contamination to waterbodies

Canada geese in large numbers can contribute fecal contamination to waterbodies.

Image: Horsemint at Indiana Dunes National Lakeshore

Horsemint at Indiana Dunes National Lakeshore

The native bee Perdita gerhardi is a specialist (oligolege) on horsemint, pictured here, exhibiting a strong preference for collecting pollen from this plant species. Horsemint grows well on disturbed sandy soils and can occur in developed areas where such soil disruption can be common. This type of soil disturbance can, therefore, be associated with frequent

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