The city of Frederick will work with the Maryland Stadium Authority to design and make improvements to the city’s Harry Grove Stadium as one of the city’s major projects in the next fiscal year. The city and the stadium authority are in the preliminary design stages of a $17.5 million project to renovate the stadium as part of the city’s effort to bring affiliated minor league baseball back to the city, Marc DeOcampo, director of strategic planning and executive projects in Mayor Michael O’Connor’s office, told the mayor and aldermen Tuesday.