# Innerste Dam

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> Source: https://en.wikipedia.org/wiki/Innerste_Dam
> Source revision: 1268912577
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{{Short description|Embankment dam in Germany}}
{{Infobox dam
| name                 = Innerste Dam
| name_official        = 
| image                = InnerstetalsperreStaumauer.jpg
| image_size           = 
| image_caption        = 
| location_map         = 
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| coordinates          = {{coord|51|54|41|N|10|17|03|E|type:landmark|display=inline,title}}
| country              = [Germany](/source/Germany)
| location             = [Lower Saxony](/source/Lower_Saxony)
| construction_began   = 1963
| opening              = 1966
| demolished           = 
| cost                 = 
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| operator             = 
| dam_type             = 
| dam_length           = 750 m
| dam_height           = 40 m
| dam_width_crest      = 8 m
| dam_width_base       = 
| dam_volume           = 850,000 m³
| dam_crosses          = 
| spillway_type        = 
| spillway_capacity    = 
| res_name             = 
| res_capacity_total   = 19.26 million m³
| res_catchment        = 97 km²
| res_surface          = 139 ha
| res_max_depth        = 
| plant_operator       = 
| plant_commission     = 
| plant_decommission   = 
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| plant_annual_gen     = 
| website              = 
| extra                = 
}}

The '''Innerste Dam ''' ({{langx|de|Innerstetalsperre}}) is a [dam](/source/dam) on the [Innerste](/source/Innerste) river, which lies near [Langelsheim](/source/Langelsheim) and [Wolfshagen](/source/Wolfshagen_im_Harz) in the [Harz mountains](/source/Harz_mountains). It was built between 1963 and 1966 and belongs to the ''[Harzwasserwerke](/source/Harzwasserwerke)''. Its purposes are the supply of [drinking water](/source/drinking_water), [flood protection](/source/flood_protection), water flow  regulation and [hydroelectric power](/source/hydroelectric_power) generation. The average annual discharge through the Innerste Dam is 60 million m³.

== Structures ==
The Innerste is an [earth-fill dam](/source/earth-fill_dam) with multiple, external, asphaltic concrete layers. It has an inspection gangway along its whole length on the upstream apron. In front of the upstream base of the dam is a shaft spillway (a flood overflow tower), into which also the bottom outlet is integrated. The water of the Innerste Dam can be pumped via a 4.6 km long diversion channel to the [Grane Dam](/source/Grane_Dam) further east, where it can be used for [water treatment](/source/water_treatment). From 2003 to 2005 the reservoir was completely emptied and renovated, especially the asphalt sealing and the bottom outlet. This work was finished in September 2005.

== Flood control ==
Because the reservoir only has a limited flood control capacity (i.e. its capacity is relatively small in relation to the annual discharge), it can only check flooding within certain limits. The flood relief facility ([spillway](/source/spillway)) is used about every two years. Nevertheless, even when the Innerste Dam overflows, the level of [retention](/source/%3Awikt%3Aretention) significantly reduces and delays flooding.

== Recreation ==
The [reservoir](/source/reservoir) may be used by sailing and rowing boats and for angling and camping. The [Innerste Valley Railway](/source/Innerste_Valley_Railway) is an old railway line, that had a halt by the Innerste Dam.

==Gallery ==
<gallery>
File:Innerstetalsperre_UEberlauf.jpg|Shaft spillway in the reservoir
File:Ueberlaufturm-18.10.03.jpg|Shaft spillway during renovation work
File:Innerstestausee_Niedrigwasser.jpg|Reservoir at low level
File:Innerste_im_Stausee.jpg|Innerste at low water
File:Innerstetalsperre Panorama.jpg|View of the Innerste Dam
</gallery>
{{Clear}}

== See also ==
* [List of dams in the Harz](/source/List_of_dams_in_the_Harz)
* [List of reservoirs and dams in Germany](/source/List_of_reservoirs_and_dams_in_Germany)

== Sources ==
* {{citation|surname1=Peter Franke|surname2=Wolfgang Frey|title=Talsperren in der Bundesrepublik Germany |publisher=Systemdruck|publication-place=Berlin|isbn=3-926520-00-0|date=  1987|language=German}}

== External links ==
{{Commons}}
* [https://archive.today/20130211050153/http://www.harzwasserwerke.de/index2.html?innerstetsp.html~haupt Harzwasserwerke.de] with a link to current dam data
* [http://www.harzlife.de/tip/innerste-talsperre.html Innerste Dam] in the Online Harz Travel Guide

{{Authority control}}

Category:Dams in Lower Saxony
Category:Dams in the Harz
Category:Earth-filled dams
Category:Dams completed in 1966

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Adapted from the Wikipedia article [Innerste Dam](https://en.wikipedia.org/wiki/Innerste_Dam) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Innerste_Dam?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.