This document discusses construction monitoring techniques used during the reinforcement of the Da Xi He No. 3 stone arch bridge in China. It describes the bridge's original design and the concrete-stone-concrete reinforcement method used. Construction monitoring of deformation and stress is discussed as an essential part of ensuring quality and safety during reconstruction. Deformation monitoring locations and measurement methods are presented, and deformation measurement data is compared to model data. Stress monitoring locations and measurement using vibrating wire sensors is also described, with stress measurement data presented and compared to model data.