Scanty information is available in the literature on scour control around a piers group founded in the gravel bed. The present study is concerned with careful experimental investigation of local scour at a group of bridge piers founded in staggered arrangement in the gravel bed. The scour control aspect in the present study was examined by applying collar plate around the piers. The present study was carried out under uniform flow clear scour condition in a gravel bed of median size 3 mm at varied radial pier spacing with 45ο constant angle of attack to the direction of flow. The present study reveals that with no use of collar plate around the piers, piers became almost free of mutual interference at clear radial pier spacing of ‘10b’, where b is the pier diameter. It is worth to mention that with collar around the piers, the effect of interference of bridge piers on local scour vanished at clear radial pier spacing of ‘7b’. The piers of new bridges may or may not align with the piers of old bridges. In this perspective, the present study is useful to practicing field hydraulic engineers on the safe and economical placing of the bridge piers, which fall in staggered arrangement in newly proposed and existing old bridges.