Question: What is the source of the body of water crossed by the South Canon Bridge?

full_context: Document 1: Colorado River (Texas): Colorado River Texas The Colorado River in Austin, as seen from Mount Bonnell. Country United States State Texas Source - location Dawson County - elevation 3,280 ft (1,000 m) - coordinates 32 ° 40 ′ 47 ''N 101 ° 43 ′ 51'' W ﻿ / ﻿ 32.67972 ° N 101.73083 ° W ﻿ / 32.67972; - 101.73083 Mouth Matagorda Bay - location Gulf of Mexico, at Matagorda County, Texas - elevation 0 ft (0 m) - coordinates 28 ° 35 ′ 41 ''N 95 ° 58 ′ 59'' W ﻿ / ﻿ 28.59472 ° N 95.98306 ° W ﻿ / 28.59472; - 95.98306 Coordinates: 28 ° 35 ′ 41 ''N 95 ° 58 ′ 59'' W ﻿ / ﻿ 28.59472 ° N 95.98306 ° W ﻿ / 28.59472; - 95.98306 Length 862 mi (1,387 km) Basin 39,900 sq mi (103,341 km) Discharge for Bay City - average 2,609 cu ft / s (74 m / s) - max 84,100 cu ft / s (2,381 m / s) - min 0 cu ft / s (0 m / s) Map of the Colorado River and associated watershed
Document 2: Colorado River: Colorado River The Colorado River at Horseshoe Bend, Arizona, a few miles below Glen Canyon Dam Countries United States, Mexico States Colorado, Utah, Arizona, Nevada, California, Baja California, Sonora Tributaries - left Fraser River, Blue River, Eagle River, Roaring Fork River, Gunnison River, Dolores River, San Juan River, Little Colorado River, Bill Williams River, Gila River - right Green River, Dirty Devil River, Escalante River, Kanab River, Virgin River, Hardy River Cities Glenwood Springs, CO, Grand Junction, CO, Moab, UT, Page, AZ, Bullhead City, AZ, Lake Havasu City, AZ, Yuma, AZ, San Luis Rio Colorado, SON Source La Poudre Pass - location Rocky Mountains, Colorado, United States - elevation 10,184 ft (3,104 m) - coordinates 40 ° 28 ′ 20 ''N 105 ° 49 ′ 34'' W ﻿ / ﻿ 40.47222 ° N 105.82611 ° W ﻿ / 40.47222; - 105.82611 Mouth Gulf of California - location Colorado River Delta, Baja California -- Sonora, Mexico - elevation 0 ft (0 m) - coordinates 31 ° 54 ′ 00 ''N 114 ° 57 ′ 03'' W ﻿ / ﻿ 31.90000 ° N 114.95083 ° W ﻿ / 31.90000; - 114.95083 Coordinates: 31 ° 54 ′ 00 ''N 114 ° 57 ′ 03'' W ﻿ / ﻿ 31.90000 ° N 114.95083 ° W ﻿ / 31.90000; - 114.95083 Length 1,450 mi (2,334 km) Basin 246,000 sq mi (637,137 km) Discharge for mouth (average virgin flow), max and min at Topock, AZ, 300 mi (480 km) from the mouth - average 22,500 cu ft / s (637 m / s) - max 384,000 cu ft / s (10,900 m / s) - min 422 cu ft / s (12 m / s) Map of the Colorado River basin Wikimedia Commons: Colorado River
Document 3: Old Trails Bridge: The Old Trails Bridge over the Colorado River, brought a now-abandoned portion of U.S. Route 66 across from Needles, California to Topock, Arizona. It is a brace-ribbed through arch bridge that was built in 1915-1916. It served as a highway bridge until 1947 when the Red Rock Bridge, formerly a railroad bridge, was modified for highway use. The Old Trails Bridge was later converted to a pipeline bridge.
Document 4: Laughery Creek Bridge: The Laughery Creek Bridge is a truss bridge on the border of Dearborn County, Indiana, and Ohio County, Indiana. It crosses Laughery Creek. This bridge was built in 1878. The Wrought Iron Bridge Company, a prolific late 19th-century bridge company, constructed the bridge. The bridge is seated on stone abutments. The deck surface is not original and is currently concrete. The bridge, nearly 300 feet in length, is a single span pin connected triple intersection Whipple through truss, and is the only example in the world of this truss type. The name bridge's nickname, "Triple Whipple Bridge" is a play on words. The double-intersection Pratt, which was called the Whipple truss configuration, was a far more common variation of the standard Pratt configuration. Since the Laughery Creek Bridge's members have three intersections instead of two, this gives rise to the "Triple Whipple" name. This bridge was listed on the National Register of Historic Places in 1976.
Document 5: Grand Canyon: The Grand Canyon (Hopi: Ongtupqa; Yavapai: Wi: kaʼi: la, Navajo: Tsékooh Hatsoh, Spanish: Gran Cañón) is a steep - sided canyon carved by the Colorado River in Arizona, United States. The Grand Canyon is 277 miles (446 km) long, up to 18 miles (29 km) wide and attains a depth of over a mile (6,093 feet or 1,857 meters).
Document 6: Dolores River: The Dolores River is a tributary of the Colorado River, approximately long, in the U.S. states of Colorado and Utah. The river drains a rugged and arid region of the Colorado Plateau west of the San Juan Mountains. Its name derives from the Spanish "El Rio de Nuestra Señora de Dolores", River of Our Lady of Sorrows. The river was explored and possibly named by Juan Maria Antonio Rivera during a 1765 expedition from Santa Fe.
Document 7: Sheely Bridge: The Sheely Bridge, originally known as the Carbondale Bridge, carries pedestrian traffic across the Roaring Fork River at Mill Street Park in Aspen, Colorado, United States. It is a short steel truss bridge originally located downstream in Carbondale and later moved to its present location.
Document 8: Green Bay Road Bridge: The Green Bay Road Bridge is a Pratt pony truss bridge across the Manitowoc River in Manitowoc Rapids. The bridge was built in 1887 by the Wisconsin Bridge and Iron Company and was the second river crossing built at its location. Originally a road bridge, the bridge is now used for a bicycle and walking trail; it is in good condition and is considered a historically significant example of a pony truss road bridge. The bridge was added to the National Register of Historic Places on August 3, 1998.
Document 9: Colorado River Compact: The Colorado River Compact is a 1922 agreement among seven U.S. states in the basin of the Colorado River in the American Southwest governing the allocation of the water rights to the river's water among the parties of the interstate compact. The agreement was signed at a meeting at Bishop's Lodge, near Santa Fe, New Mexico, by representatives of the seven states the Colorado river and its tributaries pass through on the way to Mexico.
Document 10: Water in California: The Colorado River originates more than 1,000 miles (1,600 km) from California in the Rocky Mountains of Colorado and Wyoming and forms the state's southeastern border in the Mojave Desert. Unlike the other California watersheds, essentially all of the water flowing in the Colorado originates outside the state. The Colorado is a critical source of irrigation and urban water for southern California, providing between 55 and 65 percent of the total supply.
Document 11: Glenwood Bridge: The Glenwood Bridge is a cantilever bridge in Pittsburgh, Pennsylvania, which carries Pennsylvania Route 885 over the Monongahela River. It started construction on June 3, 1958 and was completed in 1966 to replace an old decayed unsafe iron bridge built in 1894 which carried Pittsburgh Railways streetcar tracks and vehicle traffic on a wooden deck.
Document 12: South Canon Bridge: The South Canon Bridge is a truss footbridge spanning the Colorado River near Glenwood Springs, Colorado. It was built in 1915 by the Missouri Valley Bridge & Iron Co.. It was listed on the National Register of Historic Places (reference number 85000212) in 1985.).
Document 13: Sevenmile Bridge: The Sevenmile Bridge is a Pratt deck truss bridge bringing a county road over the Rio Grande, southwest of Creede, Colorado, United States. It was designed by engineer King Burghardt and is unusual for its cantilevered ends. It was built in 1935; it then carried State Highway 149. It has also been known as Bridge over Rio Grande River. It was listed on the National Register of Historic Places in 1985.
Document 14: Range Creek: Range Creek, rising in the Book Cliffs in Emery County, Utah, is a high tributary of the Colorado River. It flows into the Green River, a major tributary of the Colorado. The creek flows year around.
Document 15: Deep River Camelback Truss Bridge: It spans the Deep River in North Carolina, United States between the hamlets of Gulf in Chatham County and Cumnock in Lee County in a quiet rural setting amid woods and farmlands on both sides of the river. It was originally constructed in 1901. The bridge is listed on the National Register of Historic Places. The bridge is open to pedestrian traffic only. Vehicles may use a replacement bridge located about a hundred yards east of the historic structure.
ground_truth: La Poudre Pass
sub_queries: South Canon Bridge >> crosses Answer: Colorado River
what is the source of Colorado River Answer: La Poudre Pass