LOLO, Mont. -

Missoula County commissioners are "cautiously optimistic" they've found a mediator to resolve a long standing dispute over a Lolo guest ranch.

County officials said Dunrovin Ranch is in violation of the law. Ranch owners said government is being unreasonable.

The dispute stems from a renovated garage and a new building standing incomplete.

Dunrovin Ranch has always been a haven for SuzAnne Miller's friends and family.

She and her husband thought why not start a guest ranch.

"I had just a small piece of paradise out here," said Miller, "and I thought I'll share it with the public."

Miller said the county gave them the go ahead.

"They wished us luck," she said.

Miller and her husband renovated a detached garage and mother-in-law unit  to an office and apartments.

Eventually, said the ranch owner, they started building a new garage and storage unit, which could in the future accommodate more guests.

But the county said the new structure lacked building, electrical and sanitation approval.

In fact, it found even the old garage, new office, and apartments were in violation of sanitation and subdivision review.

"The septic system was sized for one single family dwelling," said deputy county attorney James McCubbin.

That puts the ranch in a bind.

The ranch offers horseback activities, weddings, river recreation and classes.

People come from down the road, and from all over the world.

"We've lost business," said Miller, "I have people calling all the time asking if we're going to be in business."

Miller said most of their guests don't stay overnight. But some do.

She said to reduce impact on the sewer, they use portable toilets, pump the septic twice a year to prevent problems, and test their water regularly.

"We get inadequate treatment when people don't have a system that's designed to handle the loads they need to," said environmental health director Jim Carlson. "This particular system isn't too far from the river."

Miller wants to upgrade the sewer system to install public bathrooms.

But before that can happen, the ranch must go through subdivision review.

"To undergo review for public health and safety" said McCubbin, "sufficient road access, emergency access, water for firefighting, sanitation, effects on the environment and wildlife."

Miller thinks businesses like hers that  have been operating for some years should be grandfathered in.

The Millers attempted to change the subdivision review law in the legislature in 2011. The attempt failed.