144 ESTIMATE OF COST OF ROAD. 



ESTIMATE. 



240 miles, at 25,000 per mile $6,000,000 



From the Bois cles Sioux to the crossing of Milk river, a prairie region, the Coteau du 

 Missouri having to be surmounted, and some care in the Milk River valley to guard against 

 freshets, and in providing for culverts and bridges : 



712 miles, at 840,000 per mile $28,480,000 



From the crossing of Milk river to the Smike, (point where the roads down the Columbia and 

 to the Snoqualme Pass fork,) a distance of five hundred arid fourteen miles, about one hundred 

 and fifty miles will involve heavy side-cutting, much of it in rock. The remainder will pass 

 over an essentially prairie region, though at times a rolling prairie. This estimate is for the 

 line of Lewis and Clark s Pass, the Jocko and Clark s Fork rivers. Even in the mountain 

 and wooded region, from the entrance to the Mountain Pass to the crossing of the Spokane, a 

 distance of three hundred and fifty miles, more than two hundred and fifty miles is along prairie 

 or regular river intervale, and less than one hundred miles is on side-hills. 



For the difficult work, I estimate 150 miles, at $100,000 per mile $15,000,000 



Remaining work, 364 miles, at $45,000 per mile 16,380,000 



Tunnel at Lewis and Clark s Pass, (round numbers,) 13,675 feet, at $120 per 



lineal foot 1,650,000 



Total 33,035,000 



From the point of forking of the two roads, to Seattle and Snoqualme Pass, the distance is two 

 hundred and forty miles, which may be subdivided as follows : 



Work comparatively light from the Snake to the vicinity of Lake Kitchelus, and from the 

 Snoqualme Falls to Seattle. 



193 miles, at $45,000 per mile $8,685,000 



Intermediate work, excepting line of tunnel, 40 miles, at $100,000 per mile 4,000,000 



Short tunnel, 4,000 yards, at $375 per yard (round numbers) 1,500,000 



Long tunnel, 11,840 yards, about $420 per yard 5,000,000 



St. Paul to Bois des Sioux, 240 miles 6,000,000 



Bois des Sioux to crossing of Milk river, 712 miles 28 ; 4SO,000 



Crossing of Milk river to crossing of Columbia, 706 miles 41,661,000 



Crossing of Columbia to Seattle, on Puget sound, 240 miles 17,685,000 



COST OF SPUR-ROADS, RESERVOIRS, AND STEAMERS ON THE COLUMBIA AND MISSOURI RIVERS. 



Spur-road to St. Paul $250,000 



Spur-road to Fort Union, and depots 1,000,000 



Reservoirs, aqueducts, and growth of wood 2,000,000 



Spur-road to Fort Benton 1,000,000 



Reservoir and aqueducts, Grizzly Bear lake 1,000,000 



Steamers and depots on the Missouri 2,000,000 



Steamers and depots on the Columbia 1,000,000 



8,250,000 



DEPOTS AND PERMANENT FIXTURES. 



Depot at St. Paul $200,000 



Depot at Little Falls and connexion with Lake Superior 150,000 



Depot at general plateau of the Bois des Sioux 150,000 



Depot in the vicinity of Fort Union 200,000 



