  The $Q^{2}$ dependence and the total cross sections for charged and neutral
current processes are measured in $e^{\pm}p$ reactions for transverse momenta
of the outgoing lepton larger than 25 GeV. Comparable size of cross sections
for the neutral current process and for the weak charged current process are
observed above $Q^2~\approx~5000$ GeV$^2$. Using the shape and magnitude of the
charged current cross section we determine a propagator mass of $m_{W} = 84\
^{+10}_{-7}$ GeV.
