I forgot to mention in my post yesterday that in 19th century terms the phrase "Falls of the Xxxx River" didn't mean only something like, for example, Niagra. In general usage it meant someplace where the river went over a lot of rocks and dropped a bunch in elevation. IE: Someplace where it would be near certain death to try to go in a boat but not always a photogenic spot. Sometimes it meant even less than that. Consider for example The Falls of the Ohio, famed in song and story. Sure, one channel of the Falls was Certain Death, but the other was doable if you kept your wits about you.
And in response to the question about D&RG(W) profiles, the ones I have seen tend to be too general to show something like this. For example the profile of the Silverton branch doesn't really show the short(couple of miles?) section of grade that is over 3%. The only information the charts for Curecanti-Cimmarron I've seen give is that the grade EB is 1%, WB is 1.42% (west of Crystal.) Also of interest, the rail from MP 322.66 to 327.50 is 60 lb (no date) in 1947[chart in "The Mudhens"]. East of that the '47 chart shows 65 lb (1923) with 65 lb (1919) West all the way to Montrose. Makes me wonder if the 60 lb was laid at some earlier date? The only other profile chart of this section I've seen is on pg29 of "Trails Among the Columbine: 1989" which shows 40 lb East of Crystal (undated) and 45 lb (1887)to the West. That chart is from between 1906(65 lb & 3-rails at Montrose) and 1919 (none of the 65 lb on Cerro mentioned previously.)
So I hope I've added a nice dollop to the confusion here.
hank