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36-461: The Boise River Greenbelt is a recreational and alternate transportation trail along the banks of the Boise River through Boise , Idaho , United States. The Boise Greenbelt is more of a greenway than a green belt since its character is linear. It extends more than 20 miles (32 km) beginning at Lucky Peak Dam in the east to a short distance beyond Eagle Road ( Idaho State Highway 55 ) in

72-440: A cataract into another becomes the upper fork, and the one it descends into, the lower ; or by relative volume: the smaller stream designated the little fork, the larger either retaining its name unmodified, or receives the designation big . Tributaries are sometimes listed starting with those nearest to the source of the river and ending with those nearest to the mouth of the river . The Strahler stream order examines

108-464: A lake . A tributary does not flow directly into a sea or ocean . Tributaries, and the main stem river into which they flow, drain the surrounding drainage basin of its surface water and groundwater , leading the water out into an ocean. The Irtysh is a chief tributary of the Ob river and is also the longest tributary river in the world with a length of 4,248 km (2,640 mi). The Madeira River

144-421: A 1966 Project Travois proposal, which would have used nuclear explosives to either create large amounts of rockfill aggregate for dam construction, or to induce a landslide that would have much the same effect. Project Travois was a component of Project Plowshare . The project was abandoned in 1968 after concerns were raised about radiological contamination, and the seismic safety of downstream dams. The river

180-406: A West Fork as well (now filled in). Forks are sometimes designated as right or left. Here, the handedness is from the point of view of an observer facing upstream. For instance, Steer Creek has a left tributary which is called Right Fork Steer Creek. These naming conventions are reflective of the circumstances of a particular river's identification and charting: people living along the banks of

216-414: A forking of the stream to the right and to the left, which then appear on their charts as such; or the streams are seen to diverge by the cardinal direction (north, south, east, or west) in which they proceed upstream, sometimes a third stream entering between two others is designated the middle fork; or the streams are distinguished by the relative height of one to the other, as one stream descending over

252-439: A river, with a name known to them, may then float down the river in exploration, and each tributary joining it as they pass by appears as a new river, to be given its own name, perhaps one already known to the people who live upon its banks. Conversely, explorers approaching a new land from the sea encounter its rivers at their mouths, where they name them on their charts, then, following a river upstream, encounter each tributary as

288-514: Is a popular destination for floating, specifically on the Boise greenbelt . Tubers and floaters launch at Barber Park and land at Ann Morrison Park, between major irrigation diversion dams. Several minor diversion weirs are passed as well as several bridges on the 6-mile (10 km) trip. Water skiing is popular above the dam at the Lucky Peak Reservoir. On the lower (warmwater) course of

324-584: Is for the Ridenbaugh Canal (1878) at Eckert Diversion Dam, immediately above Barber Park, five miles (8 km) from downtown Boise. Wooded through the city, the river is lined by an extensive recreational greenbelt . It flows west across the western end of the Snake River Plain in the Treasure Valley and becomes a braided stream with a wide floodplain as it crosses northern Canyon County to

360-529: Is not part of the Boise Greenbelt. Violators will be prosecuted." In 2007, a ban on bicycles through this stretch was approved by Garden City Mayor John Evans. Evans oversaw construction of the Riverside Village neighborhood as the development manager for Idaho Forest Industries (IFI) and Evans Brothers Construction. Boise River The Boise River is a 102-mile-long (164 km) tributary of

396-461: Is on the north bank 1-mile (1.6 km) west of the central point one would see a DOT with the inscription NW 1.0. If one is on the south bank 5.3 miles (8.5 km) east of the central point, one would see the inscription SE 5.3. A stretch of greenbelt west of Glenwood Street in Garden City on the north side has been closed in varying degrees over the last three decades. The former Idaho state land

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432-533: Is the largest tributary river by volume in the world with an average discharge of 31,200 m /s (1.1 million cu ft/s). A confluence , where two or more bodies of water meet, usually refers to the joining of tributaries. The opposite to a tributary is a distributary , a river or stream that branches off from and flows away from the main stream. Distributaries are most often found in river deltas . Right tributary , or right-bank tributary , and left tributary , or left-bank tributary , describe

468-626: The Smoky Mountains and Soldier Mountains of the Sawtooth National Forest north of Fairfield , 65 miles (105 km) east of Boise. It flows generally southwest, descending through a basalt canyon to fill the Anderson Ranch Reservoir , then turns northwest in central Elmore County. It joins the main stream as the southern arm of Arrowrock Reservoir, 20 miles (32 km) east of Boise. Downstream from its confluence with

504-620: The Snake River in the Northwestern United States . It drains a rugged portion of the Sawtooth Range in southwestern Idaho northeast of Boise , as well as part of the western Snake River Plain . The watershed encompasses approximately 4,100 square miles (11,000 km ) of highly diverse habitats, including alpine canyons, forest, rangeland, agricultural lands, and urban areas. The Boise River rises in three separate forks in

540-541: The Snake River . At an approximate elevation of 2,100 feet (640 m), it enters the Snake River, the Idaho- Oregon border, west of Parma and three miles (5 km) south of Nyssa , Oregon . The river was called "Reed's River" in the early 19th century, named after Pacific Fur Company employee John Reed , who explored parts of the river throughout 1813 and 1814. The river is diverted to canals for irrigation on

576-620: The Americana Boulevard bridge westward to the Main Street bridge. At the downstream side of the Main Street bridge the south bank trail resumes to approximately 1 ⁄ 4 -mile (400 m) east of the Western Idaho Fairgrounds at East 52nd Street. A brief detour via East 52nd Street, Alworth Street and Remington Street returns users to the south bank Greenbelt and continues westward approximately 1-mile (1.6 km) west of

612-627: The City of Boise as it worked to develop the Greenbelt, and in 1971 the first Greenbelt Ordinance was adopted which required a minimum setback of 70 feet (21 m) for all structures and parking areas. The City of Boise continued to slowly piece together a patchwork of land along the corridor using several methods of acquisition including purchase, exchange, leasing and receiving donations of property by individuals, civic groups and corporations. Approximately 1.5 miles (2.4 km) west of Veterans Memorial Parkway

648-650: The Glenwood Street Bridge. DOTS is an acronym for Distance & Orientation Trail System. Serving as mileposts, there are over 100 white dots 18 inches (45 cm) in diameter painted on the greenbelt. The purpose of the DOTS is to aid people in locating their position on the greenbelt relative to the downtown Boise central point. The central point, mile 0, is located near the intersection of 8th Street and River Street in downtown Boise. The DOTS are spaced at 1 ⁄ 10 -mile (160 m) increments. For example, if one

684-501: The Greenbelt. Segways are allowed on the Greenbelt in the City of Boise providing a special permit has been obtained. In 1962, the City of Boise hired a consultant, Atkinson & Associates, to create Boise's first comprehensive plan. The plan suggested the city should acquire land along the Boise River to create a continuous "green belt" of public lands stretching the entire length of the community. A local grassroots effort to clean up

720-611: The North Fork in the southern Sawtooth Wilderness Area in northeastern Elmore County. It flows west-southwest near the town of Atlanta , joining the North Fork to form the Boise River, approximately 15 miles (24 km) southeast of Idaho City . The main stream flows southwest into Arrowrock Reservoir , joining the South Fork from the Anderson Ranch Dam . The 101-mile-long (163 km) South Fork rises in northern Camas County in

756-485: The Parkcenter Boulevard area bicycling is prohibited on a section which is unpaved and follows the river bank for approximately 2 miles (3.2 km) from Barber Park to East River Run Drive. Bicyclists are routed on a circuitous route on residential neighborhood streets. A more significant gap in the south bank trail is at the west end of Ann Morrison Park where there is a 1 ⁄ 2 -mile (800 m) gap from

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792-473: The Riverside Village residential development. The bicycle dismount zone continues approximately 1.5 miles (2.4 km) westward. As of April 2008 Garden City has made it a misdemeanor to ride a bicycle on the greenbelt through Riverside Village. However, there is a roughly parallel signed bicycle route which allows bicyclists to continue westward on residential streets to the City of Eagle greenbelt without having to ride on busy State Street (State Highway 44). In

828-683: The Sawtooth Range at elevations exceeding 10,000 feet (3,050 m), and is formed by the confluence of its North and Middle forks. The North Fork, 50 miles (80 km) long, rises in the Sawtooth Wilderness Area , along the Boise – Elmore county line, 60 miles (100 km) northeast of Boise. It flows generally southwest through the remote mountains in the Boise National Forest . The Middle Fork, approximately 52 miles (84 km) in length, rises within 12 miles (19 km) of

864-540: The South Fork, the river flows generally west, adds the major tributary of Mores Creek along Highway 21 , and passes through Lucky Peak Dam to emerge from the foothills southeast of Boise. It passes over several irrigation diversion dams above the city, the first and largest is the century-old Boise River Diversion Dam for the concrete New York Canal, which terminates at Lake Lowell (a.k.a. Deer Flat Reservoir) southwest of Nampa in Canyon County . The next diversion

900-407: The arrangement of tributaries in a hierarchy of first, second, third and higher orders, with the first-order tributary being typically the least in size. For example, a second-order tributary would be the result of two or more first-order tributaries combining to form the second-order tributary. Another method is to list tributaries from mouth to source, in the form of a tree structure , stored as

936-693: The midpoint. In the United States, where tributaries sometimes have the same name as the river into which they feed, they are called forks . These are typically designated by compass direction. For example, the American River in California receives flow from its North, Middle, and South forks. The Chicago River 's North Branch has the East, West, and Middle Fork; the South Branch has its South Fork, and used to have

972-465: The north bank trail ends. However, two pedestrian bridges carry traffic to the south bank trail via an area known as Plantation Island. The north bank trail resumes at the Glenwood Street bridge approximately 1-mile (1.6 km) west of the first Plantation Island pedestrian bridge. Also on the north bank, approximately 1/4 mile west of Glenwood Bridge the greenbelt becomes a bicycle dismount zone at

1008-428: The orientation of the tributary relative to the flow of the main stem river. These terms are defined from the perspective of looking downstream, that is, facing the direction the water current of the main stem is going. In a navigational context, if one were floating on a raft or other vessel in the main stream, this would be the side the tributary enters from as one floats past; alternately, if one were floating down

1044-519: The plain west of what is now Boise. The dams that form the mountain reservoirs were constructed as part of the Bureau of Reclamation's "Boise Project" to provide agricultural irrigation, hydroelectricity , drinking water, and flood control to Boise and the Treasure Valley . The major projects' initial completion dates were: The Boise River was proposed for 50 years for a dam at Twin Springs, culminating in

1080-451: The river and its tributaries contain excellent populations of wild rainbow trout, mountain whitefish, and bull trout. This is especially true immediately downstream from the outflow of Anderson Ranch reservoir, where the South Fork takes on the characteristics of a classic "tailwater" for over 5 miles (8 km) from the put-in below the dam to Cow Creek Bridge. The Boise River is also popular for fishing , mostly for rainbow trout and, in

1116-521: The river, low summer flows and poorer water quality from agricultural runoff limit fishery production. This section of river supports a fair fishery for largemouth bass , smallmouth bass, and channel catfish . Upstream from Star , the river is a coldwater stream and supports a greater variety of fish. The most prevalent species on this section is mountain whitefish , as well as hatchery-reared rainbow trout , wild rainbow trout, and fingerling brown trout . Upstream from Lucky Peak and Arrowrock reservoirs,

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1152-472: The tributary, the main stream meets it on the opposite bank of the tributary. This information may be used to avoid turbulent water by moving towards the opposite bank before approaching the confluence. An early tributary is a tributary that joins the main stem river closer to its source than its mouth, that is, before the river's midpoint ; a late tributary joins the main stem further downstream, closer to its mouth than to its source, that is, after

1188-452: The waterway and create public access to the river corridor began to take hold. This vision caught on, and by 1967 three small parcels of land were donated to the city to launch the "green belt." In 1968, with public interest and support growing, the first Greenbelt Plan and Guidelines were adopted by the Board of Parks Commissioners. A Greenbelt and Pathways Committee was appointed in 1969 to guide

1224-662: The west in Eagle, Idaho . Taking into account both sides of the river and other parallel trails and spurs, the total Greenbelt trail system measures more than 30 miles (48 km). The Greenbelt connects Boise's riverside parks and connects Boise with neighboring municipalities. The majority of the Greenbelt is paved with asphalt or concrete on both sides of the river. However some sections are unpaved and bicycles may be prohibited on some unpaved sections. Where this occurs, bicycles have alternate routes on residential streets or dedicated bike paths. Motorized vehicles are prohibited on all parts of

1260-414: The winter, steelhead . Spin-fishermen use roostertail spinners and bait such as worms and Powerbait, while fly fishermen use a variety of flies mimicking the abundant aquatic and terrestrial insects present in the watershed, as well as streamers. Tributary A tributary , or an affluent , is a stream or river that flows into a larger stream ( main stem or "parent" ), river, or

1296-478: Was offered on condition that "...they shall construct certain improvements on the State land consisting of a bike path, lakes, pedestrian bridges (where the latter are required to assure a continuous linkage of greenbelt next to the Boise River for the length of the Riverside Village project)...", but these terms have never been met. At one point a stretch even had a sign posted stating "Private Property. No Trespassing. This

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