Hydrohistorian
Hoosier Pass Tunnel at Montgomery Reservoir near Alma
Transbasin diversion gage · HSPTUNCO · Division 1 · Water District 23 · Park County
What this gage meters
This is not a natural stream record. The Hoosier Pass Tunnel moves water from Blue River headwaters (Div 5) into Montgomery Reservoir, Middle Fork South Platte (Div 1), operated by Colorado Springs Utilities (Continental-Hoosier project) — so this record is a ledger of those deliveries. Trends here reflect operational and demand decisions, not the basin's hydrology, and the basin trends page marks it accordingly (⇆). All of Colorado's curated transbasin diversions are collected at /transbasin.
The record
Readings come from the weekly-refreshed cache, never fetched live — the date beside the value says exactly how fresh it is. The live gage is one click up.
Annual flow & trend
Where it sits
Location as DWR records it (user supplied).
Provenance
DWR station abbreviation HSPTUNCO; recorded station name “HOOSIER PASS TUNNEL AT MONTGOMERY RESERVOIR NEAR ALMA”; operated by DWR. Daily flows from the DWR HydroBase snapshot plus CDSS REST updates, refreshed on the weekly cycle. Trend statistics are Mann-Kendall (Hamed-Rao corrected) with Sen's slope in native cfs, the same numbers as the basin Trends tab.