Allegiant Travel Co. cemented its presence in the valley with the opening of its $50 million aircraft base at Lehigh Valley International Airport on Wednesday, bringing new routes for air travelers and more than 60 new employees.

As passenger traffic increases at Lehigh Valley International Airport in Hanover Township, Lehigh County, the airport authority has a plan for infrastructure improvements to accommodate more people.

A legal case over a stormwater levy enacted in 2016 by West Chester borough, one of dozens of municipalities around Pennsylvania that have added the fees over the last few years to cope with stormwater runoff and comply with environmental regulations, has pitted it against West Chester University, one of the borough largest economic engines.

With the start of summer travel season around the bend, Lehigh Valley International Airport reported a nearly 30 percent increase in passenger traffic in April compared to the same month last year.