gá7RIVER_MILEN ELEV_1940N ELEV_1972N ELEV_1982N ELEV_1986N ELEV_1989N  23.06 31.70 32.10 31.20 23.20 37.50 30.50 24.10 37.50 31.50 24.29 30.60 26.60 31.00 24.61 34.60 33.50 32.30 25.10 43.60 33.10 25.47 35.40 32.70 32.90 25.70 48.70 35.00 26.72 40.00 38.00 35.60 26.80 55.00 36.50 27.61 40.90 38.50 38.70 27.70 53.00 37.30 28.17 42.70 41.10 40.30 28.70 58.80 43.70 28.74 45.70 44.90 43.40 29.57 50.20 46.80 48.40 29.70 59.50 52.10 30.43 55.00 53.40 53.70 31.32 59.30 55.20 56.30 31.40 61.00 59.60