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We introduce a new survey to map the radio continuum halos of a sample of 35edge-on spiral galaxies at 1.5 GHz and 6 GHz in all polarization products. Thesurvey is exploiting the new wide bandwidth capabilities of the Karl G. JanskyVery Large Array (i.e. the Expanded Very Large Array, or EVLA) in a variety ofarray configurations (B, C, and D) in order to compile the most comprehensivedata set yet obtained for the study of radio halo properties. This is the firstsurvey of radio halos to include all polarization products.  In this first paper, we outline the scientific motivation of the survey, thespecific science goals, and the expected improvements in noise levels andspatial coverage from the survey. Our goals include investigating the physicalconditions and origin of halos, characterizing cosmic ray transport and windspeed, measuring Faraday rotation and mapping the magnetic field, probing thein-disk and extraplanar far-infrared - radio continuum relation, andreconciling non-thermal radio emission with high-energy gamma-ray models. Thesample size allows us to search for correlations between radio halos and otherproperties, including environment, star formation rate, and the presence ofAGNs. In a companion paper (Paper II) we outline the data reduction steps andpresent the first results of the survey for the galaxy, NGC 4631.

Continuum Halos in Nearby Galaxies -- an EVLA Survey (CHANG-ES) -- I: Introduction to the Survey