Daya Bay Reactor Neutrino Experiment

The Daya Bay reactor neutrino experiment, currently under construction in China, will be the most sensitive experiments in the world searching for the yet unknown neutrino mixing parameters, theta-13($\theta _{13})$.~ With a thermal power of 17.4GW by 2011, the Daya Bay site provides an intense electron antineutrino flux, which together with 3 years of data taking from 4 pairs of identical detectors at far and near locations, optimized baseline with large rock overburden and active water shielding, up to 80 tons total target mass comprising Gd-doped liquid scintillator and comprehensive, redundant calibration measures, will lower the upper bound on sin$^{2}$2$\theta _{13}$ to 0.01 or better.