Z05551900 USGS H05551900 4146040883411001717089SW0712000732.6 700.43 N05551900 EAST BRANCH BIG ROCK CREEK NEAR BIG ROCK, IL Y05551900 305551900 19650206 680 1.48 305551900 19660210 795 1.85 305551900 19670401 668 1.44 305551900 19680817 2432 305551900 19690123 542 0.99 305551900 19700602 550 1.02 305551900 19710219 498 0.82 305551900 19720615 1410 3.46 305551900 19730422 744 1.69 305551900 19740516 1580 3.80 305551900 19750418 398 0.40 305551900 19760305 458 0.66 305551900 19770224 382 0.33 305551900 19780913 713 1.59 305551900 19790319 889 2.13