The Water Resources Division's Surface Water Assessment Section oversees the protection of the quality of surface waters throughout the State of Michigan.
WEIGHT = 4.09 pounds Largemouth Bass Weight. The formula to calculate the weight for a Largemouth Bass that is 20 inches long and has a girth of 15 inches is as follows. Largemouth Bass have a shape factor of 1050. WEIGHT = LENGTH x GIRTH2 / SHAPE FACTOR. WEIGHT= 20 x (152) / 1050.
While John Herrickâs 6 pound, 12 ounce smallmouth bass is certainly not the largest specimen ever caught by an angler, it is the largest smallmouth bass record ever caught on fly tackle that has been submitted to the IGFA.