Table 1. Study Sites^a.

site abbreviation	site name
MSSP-CL	Mississippi River at Clinton, IA
IOWA-WAP	Iowa River at Wapello, IA
ILLI-VC	Illinois River at Valley City, IL
MSSP-GR	Mississippi River below Grafton, IL
MIZZ-HE	Missouri River at Hermann, MO
MSSP-TH	Mississippi River at Thebes, IL
OHIO-GRCH	Ohio River at Dam 53 near Grand Chain, IL
MSSP-OUT	Mississippi River above Old River Outflow Channel, LA

^aMore detail on site locations and characteristics is available in Figure SI-S1 and Table SI-S1.