The Maryland Stadium Authority has signed contracts for improvements to Oriole Park at Camden Yards, including lighting and heating upgrades.

The authority has also approved replacing carpeting on the club level, but that contract had not yet been executed as of last week.

The contracts were obtained under a Public Information Act request filed with the authority, which is the landlord for the team on behalf of the state.

The contracts include:

» Installation of new LED sports lighting. Musco Sports Lighting, an Iowa company, signed the contract with the authority on Oct. 3.

The company has done lighting for the San Diego Padres, Detroit Lions and many other teams.

Images included here are from The Baltimore Sun's archives, detailing the numerous plans for a baseball park in Baltimore, the predecessors to the ultimate design that was chosen for Oriole Park at Camden Yards. (Sean Welsh) (Sean Welsh)

The work includes demolition of the existing lighting system. The contract says the cost won't exceed $1.67 million.

» Replacement of the heat trace system at the ballpark. The contract was signed in August with Ariosa and Co., a Maryland company. The cost is not to exceed $469,500.

The playing surface at Camden Yards is also being replaced -- the first time since 2008 that the grass is being swapped out.

Camden Yards turns 25 next season. The stadium, with the brick B&O Warehouse as the right field backdrop, is rated among the best in Major League Baseball in fan and media surveys.

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