← Basin trends

Laramie Poudre Tunnel @ 10 Ft Parshall Flume

Transbasin diversion gage · LAPTUNCO · USGS 06747000 · Division 1 · Water District 48 · Larimer County

Live gage at DWR ↗ · USGS monitoring location ↗ · Download daily record (CSV)

What this gage meters

This is not a natural stream record. The Laramie-Poudre Tunnel moves water from Laramie River (Div 1, WD 48) into Cache la Poudre River (Div 1, WD 3), operated by Water Supply & Storage Co. — 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

Period of record
1931-09-30 → 2026-08-14
Daily values
35,231
Latest cached reading
20.1 cfs (2026-08-14)
Trend
decreasing, -1.2 cfs/decade (-5.1% of median)
Pettitt changepoint
~1966

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

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Where it sits

Location as DWR records it (5.0).

Provenance

DWR station abbreviation LAPTUNCO; recorded station name “LARAMIE POUDRE TUNNEL @ 10 FT PARSHALL FLUME”; 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.