Editing Snowy Mountains Scheme (section)

==Components==
Construction of the Scheme began in 1949 and was completed in 1974. Guthega power station commenced power production on 21 February 1955.

===Power stations===
{| class="wikitable sortable"
|-
! Hydro-electric power station
! data-sort-type="number | Installed capacity<br/> (MW)
! data-sort-type="number | HP <br/>(Thou)
! Year <br/>completed
|-
||[[Guthega Power Station|Guthega]]
|align="center"| 60
|align="center"| 80
|align="center"| 1955
|-
||[[Tumut Hydroelectric Power Station|Tumut 1]]
|align="center"| 330
|align="center"| 440
|align="center"| 1958
|-
||[[Tumut Hydroelectric Power Station|Tumut 2]]
|align="center"| 286.4
|align="center"| 384
|align="center"| 1961
|-
||[[Blowering Dam#Power generation|Blowering]]
|align="center"| 80
|align="center"| 110
|align="center"| 1967
|-
||[[Murray Hydroelectric Power Station|Murray 1]]
|align="center"| 950
|align="center"| 1,270
|align="center"| 1967
|-
||[[Murray Hydroelectric Power Station|Murray 2]]
|align="center"| 550
|align="center"| 740
|align="center"| 1969
|-
||[[Tumut Hydroelectric Power Station|Tumut 3]]
|align="center"| 1,800
|align="center"| 2,210
|align="center"| 1973
|-
||Tumut 3 Micro Hydro
|align="center"| 0.72
|align="center"| 0.97
|align="center"| 2004
|-
||Jounama Small Hydro
|align="center"| 14.4
|align="center"| 19.3
|align="center"| 2010
|-
||Jindabyne Dam Mini Hydro
|align="center"| 1.1
|align="center"| 1.5
|align="center"| 2011
|}

The total installed capacity is {{convert|4.073|GW}}.

=== Major dams and reservoirs ===
The Scheme's largest dam is [[Talbingo Dam]] with an embankment volume of 14 488 000 m<sup>3</sup> and a wall height of 161.5 metres.<ref>{{Cite web|url=http://www.snowyhydro.com.au/energy/hydro/dams/|title=Dams • Snowy Hydro|language=en-US|access-date=4 October 2016|url-status=dead|archive-url=https://web.archive.org/web/20130503080615/http://www.snowyhydro.com.au/energy/hydro/dams/|archive-date=3 May 2013|df=dmy-all}}</ref>  [[Khancoban Dam]] is the longest dam in the scheme with a crest length of {{convert|1067|m}}. A variety of dam and spillway types were used in the construction.

With a capacity of {{convert|4798400|ML|e9impgal+e9USgal}}, Lake Eucumbene is the largest reservoir in the Scheme. At the other end of the scale, Deep Creek Reservoir is the smallest reservoir with just {{convert|11|ML|e6impgal+e6USgal}}.<ref name="autogenerated1" />

{| class="wikitable sortable"
|-
! Dam constructed
! Year<br/> completed
! Impounded body of <br/>water
! colspan=3|Reservoir capacity 
! data-sort-type="number | Dam wall height
! data-sort-type="number | Crest length
! Dam type
! Spillway type
|-
!
!
!
!ML
! mill. imp gal
! mill. US gal
!
!
!
!
|-
|[[Blowering Dam]]
| align="center" | 1968
|Blowering Reservoir
| align="center" |1,628,000
| align="center" |358,000
| align="center" |430,000
| align="right" |{{Convert|112|m|abbr=on}}
| align="right" |{{Convert|747|m|abbr=on}}
|[[Rockfill dam|Rockfill]] [[Embankment dam|embankment]]
|[[Spillway#Types|Concrete chute]]
|-
|[[Deep Creek Dam (Tumbarumba, New South Wales)|Deep Creek Dam]]
| align="center" | 1961
|Deep Creek Reservoir
| align="center" |11
| align="center" |2.4
| align="center" |2.9
| align="right" |{{Convert|21|m|abbr=on}}
| align="right" |{{Convert|55|m|abbr=on}}
|[[Gravity dam|Concrete gravity]]
|Uncontrolled
|-
|[[Eucumbene Dam]]
| align="center" | 1958
|[[Eucumbene Dam#Lake Eucumbene|Lake Eucumbene]]
| align="center" |4,798,400
| align="center" |1,055,000
| align="center" |1,267,600
| align="right" |{{Convert|116|m|abbr=on}}
| align="right" |{{Convert|579|m|abbr=on}}
|[[Earthfill dam|Earthfill]] [[Embankment dam|embankment]]
|[[Spillway#Types|Overflow ski-jump and bucket]]
|-
|[[Geehi Dam]]
| align="center" | 1966
|Geehi Reservoir
| align="center" |21,093
| align="center" |4,640
| align="center" |5,572
| align="right" |{{Convert|91|m|abbr=on}}
| align="right" |{{Convert|265|m|abbr=on}}
|Rockfill embankment
|''[[Spillway#Bell-mouth spillways|Bell Mouth]]''
|-
|[[Guthega Dam]]
| align="center" | 1955
|Guthega Reservoir
| align="center" |1,604
| align="center" |353
| align="center" |424
| align="right" |{{Convert|34|m|abbr=on}}
| align="right" |{{Convert|139|m|abbr=on}}
|Concrete gravity
|Uncontrolled
|-
|[[Happy Jacks Dam]]
| align="center" | 1959
|Happy Jacks Pondage
| align="center" |271
| align="center" |60
| align="center" |72
| align="right" |{{Convert|29|m|abbr=on}}
| align="right" |{{Convert|76|m|abbr=on}}
|Concrete gravity
|Uncontrolled
|-
|[[Island Bend Dam]]
| align="center" | 1965
|Island Bend Pondage
| align="center" |3,084
| align="center" |678
| align="center" |815
| align="right" |{{Convert|49|m|abbr=on}}
| align="right" |{{Convert|146|m|abbr=on}}
|Concrete gravity
|Controlled
|-
|[[Jindabyne Dam]]
| align="center" | 1967
|[[Jindabyne Dam#Lake Jindabyne|Lake Jindabyne]]
| align="center" |688,287
| align="center" |151,402
| align="center" |181,826
| align="right" |{{Convert|72|m|abbr=on}}
| align="right" |{{Convert|335|m|abbr=on}}
|Rockfill embankment
|Controlled 
|-
|[[Jounama Dam]]
| align="center" | 1968
|Jounama Pondage
| align="center" |43,542
| align="center" |9,578
| align="center" |11,503
| align="right" |{{Convert|44|m|abbr=on}}
| align="right" |{{Convert|518|m|abbr=on}}
|Rockfill embankment
|Controlled
|-
|[[Khancoban Dam]]
| align="center" | 1966
|Khancoban Reservoir
| align="center" |26,643
| align="center" |5,861
| align="center" |7,038
| align="right" |{{Convert|18|m|abbr=on}}
| align="right" |{{Convert|1067|m|abbr=on}}
|Earthfill embankment
|Controlled
|-
|[[Murray Two Dam]]
| align="center" | 1968
|Murray Two Pondage
| align="center" |2,344
| align="center" |516
| align="center" |619
| align="right" |{{Convert|43|m|abbr=on}}
| align="right" |{{Convert|131|m|abbr=on}}
|[[Arch dam|Concrete arch]]
|Controlled
|-
||[[Talbingo Dam]]
| align="center" | 1970
|[[Talbingo Reservoir]]
| align="center" |921,400
| align="center" |202,700
| align="center" |243,400
| align="right" |{{Convert|162|m|abbr=on}}
| align="right" |{{Convert|701|m|abbr=on}}
|Rockfill embankment
|Concrete chute
|-
|[[Tantangara Dam]]
| align="center" | 1960
|Tantangara Reservoir
| align="center" |254,099
| align="center" |55,894
| align="center" |67,126
| align="right" |{{Convert|45|m|abbr=on}}
| align="right" |{{Convert|216|m|abbr=on}}
|Concrete gravity
|Concrete chute
|-
|[[Tooma Dam]]
| align="center" | 1961
|[[Tooma Reservoir]]
| align="center" |28,124
| align="center" |6,186
| align="center" |7,430
| align="right" |{{Convert|67|m|abbr=on}}
| align="right" |{{Convert|305|m|abbr=on}}
|Concrete embankment
|Concrete Chute
|-
|[[Tumut Pond Dam]]
| align="center" | 1959
|[[Tumut Pond Dam#Tumut Pond Reservoir|Tumut Pond Reservoir]]
| align="center" |52,793
| align="center" |11,613
| align="center" |13,946
| align="right" |{{Convert|86|m|abbr=on}}
| align="right" |{{Convert|218|m|abbr=on}}
|Concrete arch
|Controlled
|-
|[[Tumut Two Dam]]
| align="center" | 1961
|Tumut Two Pondage
| align="center" |2,677
| align="center" |589
| align="center" |707
| align="right" |{{Convert|46|m|abbr=on}}
| align="right" |{{Convert|119|m|abbr=on}}
|Concrete gravity
|Controlled
|}

=== Tunnels<ref>{{Cite book |title=Engineering Features of the Snowy Mountains Scheme |publisher=Snowy Mountains Hydro-Electric Authority |year=1972 |isbn=0642955816 |edition=1st |location=Cooma}}</ref> ===
{| class="wikitable sortable"
|+
!Tunnel
!Length
(km)
!Percentage 
Lined
!Capacity
(m<sup>3</sup>/s)
!Section
!Year 
Completed
|-
|Murrumbidgee-Eucumbene
|16.6
|17.7%
|17
|Horseshoe
|1961
|-
|Eucumbene-Tumut
|22.2
|28.3%
|113.2
|Circular
|1959
|-
|Tooma-Tumut
|14.3
|20%
|38.5
|Combination
|1961
|-
|Tumut 1 Pressure
|2.4
|100%
|124.6
|Circular
|1959
|-
|Tumut 1 Tailwater
|1.3
|54.5%
|124.6
|Horseshoe
|1959
|-
|Tumut 2 Pressure
|4.8
|100%
|124.6
|Circular
|1961
|-
|Tumut 2 Tailwater
|6.4
|100%
|124.6
|Circular
|1961
|-
|Guthega Pressure
|4.6
|11.6%
|34
|Horseshoe
|1955
|-
|Eucumbene-Snowy
|23.5
|19.7%
|96.3
|Horseshoe
|1965
|-
|Jindabyne-Island Bend
|9.8
|10.6%
|25.5
|Combination
|1968
|-
|Snowy-Geehi
|14.5
|13.3%
|113.2-147.2
|Horseshoe
|1966
|-
|Murray 1 Pressure
|12
|
|189.2
|
|
|-
|Murray 2 Pressure
|2.4
|100%
|243.5
|Horseshoe
|1969
|}

=== Pumping Stations ===
The Snowy Mountains Scheme has two pumping stations. The 600 MW pump storage facility at [[Tumut Hydroelectric Power Station|Tumut 3]] Power Station returns water to [[Talbingo Reservoir]].<ref>{{Cite web|url=http://www.snowyhydro.com.au/energy/hydro/pumping-stations/ |title=Pumping Stations • Snowy Hydro|language=en-US|access-date=4 October 2016|url-status=live |archive-url= https://web.archive.org/web/20161004064053/http://www.snowyhydro.com.au/energy/hydro/pumping-stations/ |archive-date=4 October 2016|df=dmy-all}}</ref> The 1 MW Jindabyne Pumping Station pumps water from [[Lake Jindabyne]] through to the Snowy-Geehi Tunnel at Island Bend.

==== Expansion plans ====
In March 2017, the Australian government then headed by [[Malcolm Turnbull]] suggested a $2 billion project expanding the 4.1 GW Snowy Mountains Scheme by 2 GW of pump storage for a week, building new tunnels and power stations, but no new dams. The 80% efficiency of such storage can be sufficient in leveling differences between supply and demand.<ref>{{cite web|url= http://www.smh.com.au/federal-politics/political-news/snowy-hydro-20-malcolm-turnbull-announces-plans-for-2-billion-expansion-20170315-guyozj.html |title='Snowy Hydro 2.0': Malcolm Turnbull announces plans for $2 billion expansion|date=15 March 2017|access-date=18 March 2017|via=[[The Sydney Morning Herald]]|url-status=live|archive-url= https://web.archive.org/web/20170317193301/http://www.smh.com.au/federal-politics/political-news/snowy-hydro-20-malcolm-turnbull-announces-plans-for-2-billion-expansion-20170315-guyozj.html |archive-date=17 March 2017|df=dmy-all}}</ref><ref>{{cite web|url=http://reneweconomy.com.au/turnbull-drives-stake-through-heart-of-fossil-fuel-industry-48916/ |title=Turnbull drives stake through heart of fossil fuel industry|date=15 March 2017|access-date=18 March 2017|quote=minus 20 per cent losses|url-status=live|archive-url= https://web.archive.org/web/20170317202901/http://reneweconomy.com.au/turnbull-drives-stake-through-heart-of-fossil-fuel-industry-48916/ |archive-date=17 March 2017|df=dmy-all}}</ref> Dubbed [[Snowy 2.0 Pumped Storage Power Station|Snowy 2.0]], the expansion has been under construction since 2019 and was expected to be complete by 2026.  Delays have meant the project will not be fully operational until 2029.<ref name="sh2pf">{{cite news |last=Dhanji |first=Krishani |date=3 May 2023 |title=Snowy Hydro 2.0 pumped-hydro battery project faces a further two years of delays |url=https://www.abc.net.au/news/2023-05-03/snow-hydro-delayed-for-further-two-years/102295662 |work=[[ABC News (Australia)|ABC News]] |publisher=[[Australian Broadcasting Corporation]] |access-date=5 May 2023}}</ref>