Box Butte Dam
{{Infobox dam
| name = Box Butte Dam
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| location_map = Nebraska#USA
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| coordinates = {{coord|42.45513|-103.07723|format=dms|display=inline,title|region:US-NE_type:landmark}}
| country = United States
| location = Dawes County, Nebraska
| purpose =
| status = Operational
| construction_began =
| opening = 1946
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| builder = United States Bureau of Reclamation
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| dam_height = {{convert|87|feet|abbr=on}}
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| dam_length = {{convert|5508|feet|abbr=on}}
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| res_name = Box Butte Reservoir
| res_capacity_total = {{convert|31,060|acre feet|abbr=on}}
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| res_surface = {{convert|1600|acres|abbr=on}}
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| res_elevation = {{convert|1220|m|order=flip|abbr=on}}{{gnis|1768801}}
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Box Butte Dam (National ID # NE01069) is a dam in the arid northwestern panhandle area of Dawes County, Nebraska.
The earthen dam was constructed from 1941 through 1946 by the United States Bureau of Reclamation with a structural height of {{convert|87|feet}} and {{convert|5508|feet}} long at its crest.{{cite web|url=http://www.usbr.gov/projects/Facility.jsp?fac_Name=Box+Butte+Dam&groupName=Dimensions|title=Dam details - Box Butte Dam - Bureau of Reclamation|author=|publisher=Usbr.gov|accessdate=24 December 2014}} It impounds the Niobrara River for flood control, part of the Bureau's Mirage Flats Project for irrigation water storage. No hydroelectric power is produced here.{{cite web|url=http://www.usbr.gov/projects/Project.jsp?proj_Name=Mirage%20Flats%20Project|title=Project details - Mirage Flats Project - Bureau of Reclamation|author=|publisher=Usbr.gov|accessdate=24 December 2014|archive-url=https://web.archive.org/web/20141105054055/http://www.usbr.gov/projects/Project.jsp?proj_Name=Mirage%20Flats%20Project|archive-date=5 November 2014|url-status=dead}}
The reservoir it creates, Box Butte Reservoir, has a water surface of {{convert|1600|acres}}, {{convert|612|acres}} of surrounding land, about {{convert|14|miles}} of shoreline, and a capacity of {{convert|31,060|acre feet}}.{{cite web|url=http://www.recreation.gov/recAreaDetails.do?contractCode=NRSO&recAreaId=72&agencyCode=70905|title=Recreation.gov recreation area details - Box Butte Reservoir - Recreation.gov|publisher=Recreation.gov|accessdate=24 December 2014}} Recreation includes fishing (for northern pike, walleye, largemouth bass, yellow perch, and channel cat), hunting, boating, camping and hiking.
The southern shore of the lake borders the Box Butte Reservoir State Recreation Area.