In response to Railway Man and Murphy Siding, I’m generally familiar with the financial arrangements covering the original construction of Moffat Tunnel and with the resulting litigation between DSL and the Moffat Tunnel Commission. Railway Man is correct - the tolls did not cover the costs of the railway tunnel. The reason they didn’t is interesting. The original intention was that the railroad would be charged rental that was high enough to repay the construction cost over a period of years (I think it was 50). Trouble was, the Moffat Tunnel Commission, for some reason that is lost to history, made its lease agreement with DSL - including the rental schedule - before the tunnel was completed and its full costs were known. Needless to say, the final costs proved to be much higher than the Commission had anticipated. That’s what led to the litigation. The courts ultimately decided that the Commission was stuck with the agreement they had made with the railroad. And that’s why the taxpayers in the Moffat Tunnel District had to make up the difference. Of course, as RWM points out, there were lots of collateral benefits but, from the standpoint of the owner itself (the District), it was a loser.
By the way, a few years back, the Tunnel District attempted to sell both the water and rail tunnels (the water tunnel was sold to the Denver Water Commission - the rail tunnel was not sold). At the time, a reporter asked one of the tunnel commissioners why they were selling the tunnels. His answer was something to the effect that they wanted give an opportunity to those who missed out on the Brooklyn Bridge.