paragraph_text: The Allegheny River (/ ˌæləˈɡeɪni / AL - ə - GAY - nee) is a principal tributary of the Ohio River; it is located in the Eastern United States. The Allegheny River joins with the Monongahela River to form the Ohio River at the ``Point ''of Point State Park in Downtown Pittsburgh, Pennsylvania. The Allegheny River is, by volume, the main headstream of the Ohio River.

paragraph_text: Champion is a former settlement in Nevada County, California. It lay at an elevation of 2264 feet (690 m). Champion is located on the Deer Creek, west-southwest of Nevada City.

paragraph_text: Branciforte Creek is a long watercourse in Santa Cruz County, California, United States. Branciforte Creek rises on the western slopes of the Santa Cruz Mountains and discharges to the San Lorenzo River, which in turn empties into the Pacific Ocean. Within the State of California Branciforte Creek is classified within the Central Coast Basin. As of the year 2002, the State of California has designated Branciforte Creek as impaired with respect to turbidity and pathogens. The Branciforte watershed consists of , approximately 70 percent of which is covered with mixed evergreen forest, conifer forest and other undisturbed habitats.

paragraph_text: David is a former settlement in Butte County, California. It was located north-northwest of Berry Creek on the Western Pacific Railroad, at an elevation of 1014 feet (309 m). David still appeared on maps as of 1948.

paragraph_text: A new middle school is located on NW 234th Street just east of N. May. It is for 7th and 8th grades. The old Middle School is now the Intermediate school for 5th and 6th grades. Deer Creek High School enrolls 1,356 students in grades 9 - 12.

paragraph_text: Deer Creek is a tributary of the Allegheny River located in both Allegheny and Butler counties in the U.S. state of Pennsylvania.

paragraph_text: Lafayette is a census-designated place in the center of Deer Creek Township, Madison County, Ohio, United States. It is located at , along U.S. Route 40, just west of its intersection with U.S. Route 42.

paragraph_text: Deer Creek is a census-designated place in Gila County in the state of Arizona. Deer Creek is located almost directly between the community of Tonto Basin and the town of Payson near Arizona State Route 87. The population as of the 2010 U.S. Census was 216.

paragraph_text: Barcoongere River, a watercourse of the Wooli Wooli River catchment, is located in the Northern Rivers region of New South Wales, Australia.

paragraph_text: Deer is an unincorporated community in Newton County, Arkansas, United States. Deer is located on Arkansas Highway 16, south of Jasper. Deer has a post office with ZIP code 72628.

paragraph_text: Wallingat River, a watercourse of the Mid-Coast Council system, is located in the Mid North Coast district of New South Wales, Australia.

paragraph_text: Mummel River, a watercourse of the Manning River catchment, is located in the Northern Tablelands and Mid North Coast districts of New South Wales, Australia.

paragraph_text: Deer Creek Township is a township in Otter Tail County, Minnesota, United States. The population was 348 at the 2000 census.

paragraph_text: Pieta is an unincorporated community in Mendocino County, California. It is located near the mouth of Pieta Creek southeast of Hopland, at an elevation of 476 feet (145 m).

paragraph_text: Deer Plain is an unincorporated community in Calhoun County, Illinois, United States. Deer Plain is located in southeastern Calhoun County near the confluence of the Illinois and Mississippi rivers. It was named Deer Plain because it was common to see deer grazing in the area.

paragraph_text: Maria River, a watercourse of the Hastings River catchment, is located in the Mid North Coast region of New South Wales, Australia.

paragraph_text: Berowra Creek is a remote northern suburb of Sydney, in the state of New South Wales, Australia. It is located near and around the 30 km long Berowra Creek watercourse, is spread across several different waterfront locations, and borders Hornsby Shire. Access to Berowra Creek is via boat only.

paragraph_text: Charles Town was a hub of the deerskin trade, the basis of its early economy. Trade alliances with the Cherokee and Creek nations insured a steady supply of deer hides. Between 1699 and 1715, colonists exported an average of 54,000 deer skins annually to Europe through Charles Town. Between 1739 and 1761, the height of the deerskin trade era, an estimated 500,000 to 1,250,000 deer were slaughtered. During the same period, Charles Town records show an export of 5,239,350 pounds of deer skins. Deer skins were used in the production of men's fashionable and practical buckskin pantaloons, gloves, and book bindings.

paragraph_text: Petersburg (also, Petersburgh and Greenhorn) is a former settlement in Kern County, California. It was located on Greenhorn Creek west-northwest of Miracle Hot Springs, at an elevation of 4731 feet (1442 m). Petersburg still appeared on maps as of 1956.

paragraph_text: Granite Creek is a creek and townsite in British Columbia located in the Similkameen region. Granite Creek flows north into the Tulameen River and joins that river approximately one and a half miles to the east of Coalmont, British Columbia. It is assumed Granite Creek yielded more than $500,000 in placer gold since its discovery. Gold nuggets worth $50 in value were not unusual in the early years. The creek was mined by Europeans and Chinese. Granite Creek was hydraulicked near its mouth in the 1890s.

Question: Where on a map is the river serving as the mouth of Deer Creek?
Answer: Eastern United States