Skip Navigation Link  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left
Bookmark and Share Navigation Bar End Cap

Hydrograph River at a Glance Download
South Platte River at Eleven Mile Canyon Reservoir Stage (ft)Flow (cfs)Observed: 1.95 ft at 10:31AM May 22, 2020Observed: 1.94 ft at 10:28PM May 22, 2020Observed: 1.92 ft at 10:26AM May 23, 2020Observed: 1.98 ft at 12:24PM May 23, 2020Observed: 1.99 ft at 12:28PM May 23, 2020Observed: 1.94 ft at 12:34PM May 23, 2020Observed: 1.89 ft at 7:16PM May 23, 2020Observed: 1.91 ft at 10:24PM May 23, 2020Observed: 1.9 ft at 10:22AM May 24, 2020Observed: 1.95 ft at 1:53PM May 24, 2020Observed: 2 ft at 2:10PM May 24, 2020Observed: 2.05 ft at 3:13PM May 24, 2020Observed: 2.1 ft at 3:19PM May 24, 2020Observed: 2.15 ft at 3:26PM May 24, 2020Observed: 2.2 ft at 3:46PM May 24, 2020Observed: 2.25 ft at 4:52PM May 24, 2020Observed: 2.3 ft at 5:18PM May 24, 2020Observed: 2.35 ft at 5:26PM May 24, 2020Observed: 2.4 ft at 5:34PM May 24, 2020Observed: 2.45 ft at 5:41PM May 24, 2020Observed: 2.5 ft at 5:50PM May 24, 2020Observed: 2.55 ft at 6:04PM May 24, 2020Observed: 2.6 ft at 6:18PM May 24, 2020Observed: 2.65 ft at 6:30PM May 24, 2020Observed: 2.7 ft at 6:38PM May 24, 2020Observed: 2.75 ft at 6:46PM May 24, 2020Observed: 2.8 ft at 6:55PM May 24, 2020Observed: 2.84 ft at 7:04PM May 24, 2020Observed: 2.89 ft at 7:16PM May 24, 2020Highest Observation: 2.94 ft at 8:05PM May 24, 2020Observed: 2.89 ft at 9:11PM May 24, 2020Observed: 2.84 ft at 9:28PM May 24, 2020Observed: 2.8 ft at 9:42PM May 24, 2020Observed: 2.75 ft at 10:04PM May 24, 2020Observed: 2.72 ft at 10:20PM May 24, 2020Observed: 2.67 ft at 10:42PM May 24, 2020Observed: 2.62 ft at 11:07PM May 24, 2020Observed: 2.57 ft at 11:34PM May 24, 2020Observed: 2.52 ft at 12:01AM May 25, 2020Observed: 2.47 ft at 12:34AM May 25, 2020Observed: 2.42 ft at 1:18AM May 25, 2020Observed: 2.37 ft at 2:30AM May 25, 2020Observed: 2.32 ft at 4:32AM May 25, 2020Observed: 2.27 ft at 9:32AM May 25, 2020Observed: 2.27 ft at 10:18AM May 25, 2020Observed: 2.22 ft at 1:49PM May 25, 2020Observed: 2.17 ft at 5:55PM May 25, 2020Observed: 2.27 ft at 6:49PM May 25, 2020Observed: 2.22 ft at 6:56PM May 25, 2020Observed: 2.17 ft at 7:03PM May 25, 2020Observed: 2.14 ft at 10:16PM May 25, 2020Observed: 2.19 ft at 5:33AM May 26, 2020Observed: 2.24 ft at 6:49AM May 26, 2020Observed: 2.29 ft at 9:17AM May 26, 2020Observed: 2.3 ft at 10:14AM May 26, 2020Observed: 2.31 ft at 10:12PM May 26, 2020MHFDETGC2(plotting HGIRZ) Graph Created (7:00AM May 27, 2020)ObservedLatest observed value: 2.31 ft at 10:12 PM MDT 26-May-2020. Flood Stage is 3.7 ft
About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: Not Available
NOTE: Forecasts are not available for the South Platte River at Eleven Mile Canyon Reservoir. Only observed stages are available for this point.
Return to Area Map
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.

For more information on your flood risk go to

Zoom Level:12
KML Image
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.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
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  
Additional Information Collapse
Pool elevation, storage, inflow and outflow observations available from Denver Water

How low could the inflows get?
Resources Collapse
Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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
National Weather Service
Denver/Boulder Weather Forecast Office
325 Broadway
Boulder, CO 80305-3328
(303) 494-4221
Ask Questions/Webmaster
Page last modified: 1-Mar-2019 12:33 AM
Privacy Policy
About Us
Career Opportunities