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As of 2010 there are six levels in the hierarchy, represented by hydrologic unit codes from 2 to 12 digits long, called regions, subregions, basins, subbasins, watersheds, and subwatersheds. The table below describes the system's hydrologic unit levels and their characteristics, along with example names and codes.
The state of Oklahoma is served by the following area codes: 405/572: Central Oklahoma including Oklahoma City (original area code created in 1947; 572 added as overlay on April 24, 2021 [1] [2] [3] 580: Western and southern Oklahoma (split from 405 in 1997) 539/918: Northeastern Oklahoma including Tulsa (918 created in 1953 as split from 405 ...
A water resource region is the first level of classification used by the United States Geological Survey to divide and sub-divide the United States into successively smaller hydrologic units as part of the U.S. hydrologic unit system. This first level of classification divides the United States into 21 major geographic areas, or regions.
Water levels in the river are generally adequate for boating year-round. [3] On the upper portion of Broken Bow Lake is the McCurtain County Wilderness Area, an Oklahoma State-owned 14,000 acres (5,700 ha) tract which contains the largest remaining virgin shortleaf pine/hardwood forest in the nation. Hunting is permitted in the wilderness area. [4]
In Oklahoma, streamwater is defined to include “water in ponds, lakes, reservoirs, and playa lakes” [2] (or dry lakes). Streamwater is considered to be publicly owned; the Oklahoma Water Resources board is responsible for appropriation for all areas of the State of Oklahoma except the Grand River basin, where the Grand River Dam Authority (GRDA) has responsibility for allocation on a use ...
The other three area codes serving Oklahoma are 918 and 539, which cover northeastern Oklahoma (including the city of Tulsa); and 580, which serves western and southern Oklahoma. Area code 405 was one of the original area codes put into service in 1947 by telecom giant AT&T. Until January 1, 1953, it covered the entire state of Oklahoma.
Lake Ellsworth is a lake in Caddo and Comanche counties in the state of Oklahoma in the United States. [1] It was built by the City of Lawton, Oklahoma in 1962, primarily to serve as a water supply source for Lawton and the surrounding area. The nearest community is Elgin, Oklahoma. [5]
The following is a list of lakes in Oklahoma located entirely (or partially, as in the case of Lake Texoma) in the state. Swimming, fishing, and/or boating are permitted in some of these lakes, but not all. Oklahoma has more than 200 lakes created by dams. All lakes listed are man-made. Oklahoma's only natural lakes are oxbow and playa lakes ...