| 词条 | Wilbur D. Mills Dam |
| 释义 |
| name = Wilbur D. Mills Dam | name_official = | image = Wilbur D. Mills Dam.jpg | image_size = | image_caption = Wilbur D. Mills Dam | image_alt = | location_map = Arkansas#USA | location_map_size = | location_map_caption = Location of Wilbur D. Mills Dam | location_map_alt = | coordinates = {{coord|33|59|20|N|91|18|47|W|type:landmark|display=inline,title}} | country = United states | location = Arkansas County, Arkansas / Desha County, Arkansas | purpose = Flood control, power | status = Operational | construction_began = 1963 | opening = 1968 | demolished = | cost = | owner = | operator = | dam_type = Barrage | dam_crosses = Arkansas River | dam_height_foundation = {{convert|52.4|ft|m|abbr=on}} | dam_height_thalweg = | dam_length = | dam_elevation_crest = | dam_width_crest = | dam_width_base = | dam_volume = | spillway_count = | spillway_type = | spillway_capacity = | res_name = | res_capacity_total = | res_capacity_active = | res_capacity_inactive = | res_catchment = | res_surface = | res_max_length = | res_max_width = | res_max_depth = | res_elevation = | res_tidal_range = | plant_name = Electric Cooperatives of Arkansas Hydropower Generating Station | plant_coordinates = | plant_operator = | plant_commission = 1999 | plant_decommission = | plant_type = | plant_hydraulic_head = | plant_turbines = | plant_capacity = 102.6 megawatts | plant_capacity_factor = | plant_annual_gen = | website = | extra = }}Wilbur D. Mills Dam is a steel dam and generating facility located on the Arkansas River in Arkansas County and Desha County, Arkansas, United States.[1] The dam is part of the McClellan–Kerr Arkansas River Navigation System, and is named for Wilbur D. Mills, a member of United States House of Representatives from Arkansas. DesignWilbur D. Mills Dam is {{convert|52.4|ft|m|abbr=on}} high, and consists of a {{convert|3773|ft|m|abbr=on}} long earthen embankment, a {{convert|5180|ft|m|abbr=on}} long high-level overflow, and a {{convert|5180|ft|m|abbr=on}} long spillway.[2] HistoryThe course of the lower Arkansas River changes significantly downstream from the location of the dam, where the river follows a long winding route until it reaches its outflow at the Mississippi River, approximately {{convert|25|mi|km|abbr=on}} southeast. This circuitous portion of the Arkansas River between the current dam location and the Mississippi River was historically bypassed by river vessels; early steamboats instead followed a network of rivers—known as the Arkansas Post Canal—which flowed north of the lower Arkansas River, and followed a shorter and more direct route to the Mississippi River. When the McClellan–Kerr Arkansas River Navigation System was constructed between 1963 and 1970, the Arkansas Post Canal was significantly improved, while the lower Arkansas River continued to be bypassed by river vessels. For this reason, the dam was erected with no lock facilities because the waters downstream of the dam were used only by small recreational boats. Access to the Arkansas Post Canal is {{convert|2.5|mi|km|abbr=on}} northwest of the Wilbur D. Mills Dam.[3] The dam was at first called Dam Number 2, and was constructed between 1963 and 1968.[1][4] In 1982, flooding along the Arkansas River caused 38 barges to break loose between {{convert|5|mi|km|abbr=on}} and {{convert|8|mi|km|abbr=on}} upstream from the dam. Fourteen of the barges struck the dam while two passed through the dam's open gate bays. Initial repairs cost $141,000, and additional repairs were initiated in 1990.[5] A hydroelectric power plant was installed at the dam between 1994 and 1999. Completed at a cost of $189 million, the plant has a generating capacity of 102.6 megawatts.[6] Recreation areaThe Wilbur D. Mills Campground is located on the Arkansas County side of the dam. The campground has 21 campsites and a boat launch.[7] See also
References1. ^1 {{gnis|82010|Dam Number 2}} 2. ^{{cite web | last1 =McDonald | first1 = James E. | last2 = Curtis | first2 = Nancy F. | title = Repair and Rehabilitation of Dams: Case Studies | publisher = US Army Corps of Engineers | date = 1999 | url = http://www.dtic.mil/get-tr-doc/pdf?AD=ADA372898}} 3. ^{{cite web | title = Arkansas – Verdigris River Navigation | publisher = American Canal Society | url = http://www.americancanals.org/Data_Sheets/Arkansas/Arkansas%20River%20rvsd3.pdf | accessdate = April 30, 2017}} 4. ^{{cite web | title = Report of the Port 2016 | publisher = Little Rock Port Authority | date = 2016 | url = http://lrportauthority.com/wp-content/uploads/2015/07/LRPA_Annual_Report_2016.pdf}} 5. ^{{cite web | last1 =McDonald | first1 = James E. | last2 = Curtis | first2 = Nancy F. | title = Repair and Rehabilitation of Dams: Case Studies | publisher = US Army Corps of Engineers | date = 1999 | url = http://www.dtic.mil/get-tr-doc/pdf?AD=ADA372898}} 6. ^{{cite web | title = Hydroelectric Power | publisher = Electric Cooperatives of Arkansas | url = http://www.aecc.com/renewable-resources/hydroelectric-power | accessdate = April 30, 2017}} 7. ^{{cite web | title = Wilbur D. Mills, AR | publisher = Recreation.gov | url = https://www.recreation.gov/camping/wilbur-d-mills/r/campgroundDetails.do?contractCode=NRSO&parkId=71501 | accessdate = April 30, 2017}} 2 : Dams in Arkansas|Dams completed in 1968 |
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