In copies of the report leaked to the press, Zinke had recommended changes "to promote a healthy forest through active timber management" and to prioritize traditional uses such as hunting and fishing.
Patagonia, which is expected to file a lawsuit by Wednesday, replaced its usual home page with a stark message, "The President Stole Your Land".
Cathy Johnson, from the Natural Resources Council of ME, said Zinke's statements to reporters and his reports haven't resolved uncertainty for local residents.
"We have seen how this tragic federal overreach prevents many Native Americans from having their rightful voice over the sacred land where they practice their most important ancestral and religious traditions", he said. Two lawsuits have been filed to try to block the Grand Staircase decision, the outlet reported.
Zinke said commercial logging is not allowed within the 87,500-acre Katahdin Woods and Waters because it is part of the National Park Service land holdings.
The administration and congressional Republicans argue previous presidents abused their authority under the Antiquities Act to unilaterally declare national monuments, setting aside larger and larger swaths of public land, limiting development opportunities and stifling local control.
Trump's Monday order to shrink both the Bears Ears and Grand Staircase-Escalante national monuments by roughly 1 million acres each would be the largest retraction of publicly owned lands in USA history, which Patagonia also noted on its website.
When Trump announced he would dramatically shrink Utah's monuments, Native American leaders, along with environmental and conservation groups, vowed to take the fight to court.
Zinke said Tuesday he would focus changes in Gold Butte on the site's water districts.
Zinke said the more than 2.5 million public comments on his review "overwhelmingly" favored the monuments remain unchanged.
A coalition of five tribes that spent years pushing for the creation of Bears Ears National Monument said Monday it will wage a legal battle over the president's plan to reduce the protected area by 85 percent.