He archetype of modern policing when it was created in 1905 was the

Pennsylvania State Police

The Pennsylvania State Police was founded in 1905 by order of Governor Pennypacker when he signed Senate Bill 278 . This was in response to the Great Anthracite Strike of 1902. Before the signing of this bill private police forces were used by mine and mill owners to stop worker strikes.  

there were abundant sources of fuel nearby

an interest group is an organization whose members share common concerns, and try to influence government policies that impact those concerns. elected officials frequently complain about the influence of "special interests" on american politics.