Both, one from Otago and the other from Christchurch, will now be taken in to account when Heritage NZ considers whether amendments to the draft plan are necessary and appropriate, its general manager of heritage destinations, Priscilla Pitt, said.
''Depending on the level of any change required, the amended draft may need to go back to our internal technical review committee prior to approval by our board,'' she said.
There was no timetable on when a decision had to be made and a final plan approved.
The draft plan for the 1866 mill was released in May for public comment, which closed on July 2.
The property was bought by the New Zealand Historic Places Trust in 1977 and, with Totara Estate, is one of two major heritage agricultural sites it owns in North Otago.
The aim of the plan is to protect, preserve and conserve the heritage values through future management of Clarks Mill, and it makes major recommendations including some demolition, additions and alterations to return it to its 1949 specifications.
In the report, which covers the property as a whole, including all its individual structures and the mill dam and race from the Kakanui River under State Highway 1, are policies for conserving identified heritage values and recommendations for long-term management.
The report looked at three options - keeping the buildings as they are now and accepting inconsistencies and discrepancies; completing and correcting the exterior of the mill to 1906; or drawing the site together to the period after its last major refurbishment of mill machinery in 1949, when the site was in its heyday and had electricity.
The plan recommends the third option.
It also lists a large amount of work to meet that recommendation, including fire sprinklers, restoration of the water race to working order with water turbines generating electricity, replication of the missing spillway and fluming, adoption of a cyclical maintenance programme, structural surveys of some buildings to even adopting consistent floorboard timber, and checking the cliff behind the mill every six months to guard against rock falls.
