LINDSBORG, Kan. (AP) — Work is underway to repair a national historic site that marks a spot where Spanish explorers stopped centuries ago in central Kansas.

Project manager Bill Shipley says a new concrete deck and wood timbers, columns and beams have been put in at the castle at Coronado Heights near Lindsborg. It was built more than 80 years ago by Depression-era Works Progress Administration crews.

The Salina Journal reports that the $150,000 project is funded by more than 200 individuals, businesses and foundations and a grant from the Kansas State Historical Preservation Trust Fund.

Coronado Heights has remained open throughout the renovations.

Shipley says he anticipates that the project will be completed by mid- to late-August.