The results of leveling along U.S. Highway 395 between Lee Vining and Toms Place, California, in 1957, 1975, 1980, 1982, and 1983 define the development of a dome-shaped uplift across the Long Valley caldera. These levelings indicate that Toms Place remained virtually invariant with respect to Lee Vining during the full interval 1957--1983, implying that the end points of the survey route lie beyond the range of the developing dome. No significant uplift occurred before 1975, but by October 1980 the uplift near Casa Diablo Hot Spring reached 0.25 m and the half width of the dome was of the order of 25 km. The uplift of Casa Diablo Hot Springs increased to 0.35 m by August 1982 and to about 0.40 m by August 1983 without any appreciable increase in the lateral extent of the dome. The August 1982 to August 1983 uplift apparently occurred before February 1983 with little or not uplift during the period February--August 1983. The 1975--1983 uplift is attributed to the injection of 0.19 km3 of magma into a spherical chamber at a depth of 10 km beneath the southern quadrant of the ancient resurgent dome within the caldera. Examination of the full vertical control record through the Long Valley area indicates that the 1975--1983 uplift is unique within the period 1905--1983. Although comparisons of the results of a 1932 leveling against a 1914 datum disclose a 1914--1932 down-to-the-northwest tilt of about 10 μrad over the reach between Toms Place and Lee Vining, this tilt (if real) is more reasonably attributed to regional tectonic deformation than it is to the movement of magma at depth.