Durham 480 for 9 dec (Collingwood 177, Steel 72, Coughlin 68) lead Derbyshire 164 (Onions 4-44) by 316 runs
Graham Onions took advantage of some limp Derbyshire batting to grab the four scalps which took him to 600 first-class wickets on the second day of the Specsavers County Championship match at Chester-le-Street.
The visitors were all out for 164 in reply to Durham's 480 for nine declared, and with two overs still to be bowled the umpires ruled the light was too poor to resume.
Durham's total featured 177 from Paul Collingwood and 53 not out from Matthew Potts, whose five previous first-class innings had yielded three ducks, a two and 14 not out.
After resuming on 127, Collingwood soldiered on relentlessly to his third highest championship score, the two higher ones both coming in 2005 - 190 at Derby and 181 at Taunton. His best score remains his 206 for England at Adelaide in 2006.
He pulled Hardus Viljoen for his only six before hooking the next ball straight to long leg. It ended his 228-ball innings and left Viljoen with five for 130, but once the shine had worn off the second new ball Derbyshire lacked the firepower to extract any life from the surface.
Nor did Onions and Rushworth have much joy initially. Despite regularly beating left-handed openers Ben Slater and Luis Reece, it was the 12th over before the latter edged Onions to Michael Richardson.
Billy Godleman made two before groping forward to a ball from Rushworth which took out his off stump and Derbyshire were 41 for three when Paul Coughlin splattered Madsen's timber.
Coughlin retired through injury after four overs and Onions returned to remove Slater for 29 and Palladino with the help of sharp catches by Tom Latham at second slip. He also had Viljoen caught behind.
Rushworth nipped one back to pin Matt Critchley lbw for 12 and there were also two wickets for Keaton Jennings.
He may be short of runs, but he struck with his ninth ball when he had Alex Hughes lbw for 47. Harvey Hosein made 12 before being strangled down the leg side to give Jennings two for 13 from nine overs.