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Hydrograph River at a Glance Download
South Platte (Reservoirs) at Eleven Mile Canyon Reservoir Inflow Discharge (cfs)Highest Forecast: 137 cfs 6:00PM Aug 20, 2019Forecast: 136 cfs 12:00AM Aug 21, 2019Forecast: 136 cfs 6:00AM Aug 21, 2019Forecast: 135 cfs 12:00PM Aug 21, 2019Forecast: 134 cfs 6:00PM Aug 21, 2019Forecast: 134 cfs 12:00AM Aug 22, 2019Forecast: 133 cfs 6:00AM Aug 22, 2019Forecast: 132 cfs 12:00PM Aug 22, 2019Forecast: 132 cfs 6:00PM Aug 22, 2019Forecast: 131 cfs 12:00AM Aug 23, 2019Forecast: 130 cfs 6:00AM Aug 23, 2019Forecast: 130 cfs 12:00PM Aug 23, 2019Forecast: 129 cfs 6:00PM Aug 23, 2019Forecast: 128 cfs 12:00AM Aug 24, 2019Forecast: 128 cfs 6:00AM Aug 24, 2019Forecast: 127 cfs 12:00PM Aug 24, 2019Forecast: 126 cfs 6:00PM Aug 24, 2019Forecast: 126 cfs 12:00AM Aug 25, 2019Forecast: 125 cfs 6:00AM Aug 25, 2019ESSC2(plotting QIIRZ) Graph Created (2:30PM Aug 20, 2019)Forecast (issued 7:45AM Aug 20)
About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: Not Available
NOTE: Forecasts for the South Platte (Reservoirs) at Eleven Mile Canyon Reservoir are issued as needed during times of high water, but are not routinely available.
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Upstream Gauge - at Spinney Mountain Reservoir Upstream Gauge Downstream Gauge Downstream Gauge - at Cheesman Reservoir
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 0
Action Stage: 8600
Low Stage (in feet): -9999

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.

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Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
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8602 TOP OF DAM.
(1) Looking west
About This Location Collapse

Latitude: 38.904722° N, Longitude: 105.476667° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft Not Available Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  
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How low could the inflows get?

Pool elevation, inflow and outflow observations available from Denver Water
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Hydrologic Resources Additional Resources
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
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Boulder, CO 80305-3328
(303) 494-4221
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Page last modified: 1-Mar-2019 12:33 AM
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