Montgomery Reservoir
{{Infobox body of water
| name = Montgomery Reservoir
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| image = Montgomery Reservoir.JPG
| alt =
| caption = The reservoir and dam viewed from Highway 9
(North Star Mountain in the background)
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| location = Park County, Colorado
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| coordinates = {{coord|39|21|20|N|106|04|33|W|region:US-CO_type:waterbody|display =inline,title}}{{cite gnis |id= 179964 |name= Montgomery Reservoir}}
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| inflow = Middle Fork South Platte River
Hoosier Tunnel
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| outflow = Blue River Pipeline
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| basin_countries = United States
| agency = Water Resources Department, Colorado Springs Utilities
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| area = {{convert|95|acre|abbr=off|sp=us}}{{cite web |url=https://docplayer.net/15877335-Exhibit-a-scope-of-work-montgomery-reservoir-improvements.html |title=Exhibit A: Scope Of Work, Montgomery Reservoir improvements |author= |website=Doc Player |publisher= |access-date=2020-07-18 |quote=}}
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| volume = {{convert|5088|acre.ft|abbr=off}}{{cite book |author=Black & Veatch |author-link= Black & Veatch |date= 1996 |title=Water resource plan for Colorado Springs Utilities |url=https://mountainscholar.org/bitstream/handle/10217/89947/WFMP01052.pdf?sequence=1 |location=[Colorado Springs] |publisher=Water Resources Department, Colorado Springs Utilities |page=}}
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| elevation = {{convert|10873|ft|m|abbr=off|sp=us}}
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| frozen = in winter
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| pushpin_map = USA Colorado
| pushpin_label_position = right
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| pushpin_map_caption = Montgomery Reservoir
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}}
Montgomery Reservoir lies high in Colorado's Mosquito Range near Hoosier Pass a few miles north of Alma, Colorado. The reservoir sits at an altitude of {{convert|10873|ft|m|abbr=off|sp=us}}. It is owned by Colorado Springs Utilities and delivers water to Colorado Springs, Colorado for municipal use. Built in 1957, the reservoir stores water from the Middle Fork South Platte River and from a tunnel that brings water from the Blue River on the west side of the continental divide.
Transbasin diversion
Most of the water entering the reservoir comes through the Hoosier Tunnel which collects water from the Blue River watershed on the west side of the continental divide and conveys it to the east side, an instance of a transbasin diversion.{{cite web |url=http://clui.org/ludb/site/hoosier-tunnel-east-portal-and-montgomery-reservoir |title=Hoosier Tunnel East Portal and Montgomery Reservoir, Colorado |author= |date= |website=The Center for Land Use Interpretation |publisher= |access-date=2020-07-18 |quote=}} Because the reservoir lies near the top of the headwaters of the Middle Fork South Platte River, the watershed above the dam is rather small — only {{convert|7.7|sqmi|abbr=off|sp=us}} in size,{{cite web |url=http://legacy.rockymountainbidsystem.com/xfer/PublicSolicitation_doc.asp?SDIR=134689&2-Exhibit%20A_SOW.pdf |title=Statement of work: Technical feasibility and alternatives analysis for Montgomery Dam upstream face rehabilitation |author= |website=Rocky Mountain E-Purchasing System |publisher= |access-date=2020-07-18 |quote=}} so its catchment basin is limited. Thus the chief source of the lake's water is the Hoosier Tunnel.
The reservoir is drained by the Blue River Pipeline, a {{convert|70|mi|abbr=off|adj=on|sp=us}} long pipeline that flows by gravity to the Colorado Springs Utilities-owned North and South Catamount reservoirs on the slopes of Pikes Peak. From there, the water is treated and delivered to municipal water customers in Colorado Springs.
Dam
Montgomery Dam{{cite gnis |type=retired|id= 198858 |name= Montgomery Dam}} is a rockfill structure. It is approximately {{convert|1900|ft|abbr=off|sp=us}} long and {{convert|113|ft|abbr=off|sp=us}} high. When it was built, the dam was sealed with an asphalt concrete facing.
References
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Category:Bodies of water of Park County, Colorado