RAINBOW RIVER FULL
Average) Singles and Paddle Boards: $40.00 Double Kayaks and Canoes: $55.00 Rentals are full day and include shuttle, lifejacket, paddle, and parking. Hole Float: Shuttle up the Rainbow River! Float the crystal clear, pristine stream that has up to 500 million gallons of pure water each day flow from the many springs that form this aquarium-like river. The waterfall was named "Beautiful Cascade" and later "Handsom Falls" by Lewis, but was given its present name by Thomas Paschall Roberts, a railroad engineer, in 1872.K.P. here the river pitches over a shelving rock, with an edge as regular and streight as if formed by art, without a nich or br in it the water descends in one even and uninterrupted sheet. a few hundred yards further and was again presented by one of the most beaobjects in nature, a cascade of about fifty feet perpendicular streching at across the river from side to side to the distance of at least a quarter of a mile. hearing a tremendious roaring above me I continued. Meriwether Lewis was known to comment on the falls: The waterfall received its name from the frequent presence of rainbows in its spray before the dams were built. Black Eagle Falls and Great Falls are half-occupied by their dams' powerhouses, and Colter Falls is submerged. Rainbow Falls and downstream Crooked Falls are the only two waterfalls on the Missouri-Mississippi river system to remain in an almost-natural condition. Rainbow Falls was first discovered by the Lewis and Clark Expedition. However, while Black Eagle and Grand Falls were half obliterated by the construction of power canals, Rainbow Falls remains virtually unaltered. Grand Falls is in a similar situation to Rainbow and Black Eagle falls. Crooked Falls, as mentioned, is mostly in its natural state, except for an infill on its right side where the penstocks were constructed. Downstream are Crooked Falls and the Grand Falls of the Missouri. Upstream of Rainbow Falls lies Colter Falls and Black Eagle Falls the former is buried under the reservoir formed by Rainbow Dam, while the latter is controlled by a dam in a similar way to Rainbow Falls.
RAINBOW RIVER SERIES
Also, water comes out of a pipe at the left bank side of the falls, and trickles into the river in a series of small waterfalls. On the right, there are also two drops, each around 10 ft (3m) wide at low flow. Some water still continues down the right side of the falls through a few parallel drops, trickling out of the river outlet works. The falls themselves are reduced to a mere trickle.
The penstocks continue downstream past 19-ft (5m) Crooked Falls, utilizing the combined drop of over 70 ft (21m) to generate hydroelectricity through 8 turbines. In the autumn, however, the majority of the river is diverted through penstocks around the right side of the falls.
Much of the water is still diverted to generate power, but there is still enough water flow in the river to flow over the dam's spillways. The river below the falls remains mostly full. The flow at this point usually still extends across most (70 percent) of the full width of the river, but a section in the center remains dry except for a narrow stream of water that is found when the flow is low enough to separate it from the left-side drop, but high enough to feed it. Below the falls is a long, narrow plunge pool, and a series of gravel bars.Īs the flow over the falls diminishes, usually from summer to early autumn, it splits into two parts, hugging both banks. Expansive and arid hills rise above the canyon on each bank. The left side of the falls is more heavily eroded than the right side, and sits a little farther upstream. The center section of the dam, which is also a spillway structure, only functions when the flow above the reservoir is too great. In peak flow in the springtime, the falls is much like its original form - especially on the right side where the outlet works of the dam are located, and on the left side where the main spillway structure is positioned. Rainbow Falls varies widely - whether it is in full flow in the spring, or greatly diminished by the autumn. A railroad bridge crosses the river directly above the falls. As a result, the falls can almost totally dry up in the summer with only a few narrow strips of water trickling down its face.
In 1914 the river shortly upstream was dammed for hydroelectric power by the Rainbow Dam, which forms a run-of-the-river reservoir. The falls used to flow with a great deal of force year-round. The river spills over a sheer ledge of sandstone in the Kootenai Formation, forming the falls. The waterfall is part of the five Great Falls of the Missouri. Rainbow Falls (originally "Handsome Falls") is a waterfall on the Missouri River in Great Falls, Montana, just upstream from Crooked Falls and downstream from Colter Falls and Rainbow Dam.
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