The council in August granted Geoff and Tracey Scurr, of Geoff Scurr Contracting, consent to expand their quarry operation, but with 24 conditions to protect neighbours from noise, dust and other problems.
The couple launched an appeal in October and earlier this week held mediation talks with council staff and neighbours who had become parties to the appeal.
Yesterday, Mrs Scurr said agreement had been reached with the council and two neighbours, but details remained confidential until documentation was finalised, which she expected would happen before Christmas.
The council's original decision, made public in August, limited rock extraction to 30,000cu m each year; less than the maximum 45,000cu m the Scurrs wanted in some years.
Announcing the appeal, Mrs Scurr said the company wanted to reduce rock-crushing, loading and transporting activities on Saturdays, and in return start weekday rock-crushing activities - when needed - one hour earlier than allowed, at 7am, not 8am.
The company also wanted to be allowed to carry over some unused rock extraction capacity from one year to the next, while remaining within the average 30,000cu m annual limit "or thereabouts" required by the council, she said.
A clarification to a condition defining "crushing time" was also being sought.