  The interstellar medium hosts a population of scattering screens, most of
unknown origin. Scintillation studies of pulsars provides a sensitive tool for
resolving these scattering screens and a means of measuring their properties.
In this paper, we report our analysis of 34 years of Arecibo observations of
PSR B1133+16, from which we have obtained high-quality dynamic spectra and
their associated scintillation arcs, arising from the scattering screens
located along the line of sight to the pulsar. We have identified six
individual scattering screens that are responsible for the observed
scintillation arcs, which persist for decades. Using the assumption that the
scattering screens have not changed significantly in this time, we have modeled
the variations in arc curvature throughout the Earth's orbit and extracted
information about the placement, orientation, and velocity of five of the six
screens, with the highest-precision distance measurement placing a screen at
just $5.46^{+0.54}_{-0.59}$ pc from the Earth. We associate the more distant of
these screens with an under-dense region of the Local Bubble.
