← My Water  ·  All ditches in this district  ·  Print / save as PDF  · 

 ·  every download of this record carries its certificate id

EGGLESTON NO 1 DITCH

Structure dossier · WDID 0600608 · DITCH · COAL CREEK · DWR record

Source DWR administrative record · verify at DWR structure ↗ Source DWR administrative record · verify at DWR diversion records ↗ Source Our computation, scored against a reference · scored against DWR's call analysis, see /methods

Where this page's figures come from

Generated 2026-10-13 01:55 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260928 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (dd58e60) — every figure regenerates from this named code version and data image.

The record and the river

Where this structure is measured

GageFlowing nowRecordHow we know
EGGLESTON 1 DITCH EG1DITCO 0.0 cfs 2020–2026, 2,171 days DWR telemetry mapping

A green link is DWR's own: either its telemetry inventory maps this WDID to that station, or the station is named for this WDID (0700553 → 0700553A). An amber one is ours — the station sits within 250 m and shares a distinctive word with this structure's name, which is a strong hint rather than a DWR statement that this gage meters this structure. Wrong? Tell us.

Flowing now

0.0 cfs as of 2026-10-13 00:00 (1.9 h ago)

Zero is a real reading: the gage is reporting, and it says this structure is not diverting right now.

Provisional 15-minute telemetry from EG1DITCO ↗ (EGGLESTON 1 DITCH). Raw, not the approved record — it is never merged into the diversion history below. DWR publishes the official diversion record after the water year closes and is approved, which is why that record ends months back while this reads minutes ago.

In short

EGGLESTON NO 1 DITCH holds 2 decreed rights on COAL CREEK. A call at HOWELL DITCH on BOULDER CREEK (1860-04-01) currently reaches it: fully called out. 7 further calls state no district and sit outside this one, so they are counted here rather than assumed either way. That is today's position; the weeks ahead cannot be projected for it: no gage record for this year at this date, so there is nothing to find analogs for. In a median year over its last 15 recorded years it diverts 186 acre-feet. That use is falling by about 16.0 acre-feet a year over 15 years (p=0.005583616806378755). It was a party to 2 court cases that also touched 3 other structures.

Assembled from the figures on this page — every number above is checked against them before it is shown (11 checked). The detail, with its method, is in the cards below.

Download this structure

Everything on this page as data you can work with — and a README that makes it citable: the HydroBase snapshot it was built from, the build commit, what every column means, the method behind each derived figure, and that method's stated limits.

⇩ Full record (.zip) Print / save as PDF

Or one table at a time: rights.csv · annual_use.csv · curtailment_now.csv · court_cases.csv · co_parties.csv · call_climatology.csv

What is in the bundle
  • rights.csv — every decreed right, most senior first, with admin numbers, dates, amounts, uses and case numbers.
  • annual_use.csv — recorded diversion by year, with releases accounted separately.
  • curtailment_now.csv — each right's current priority status and how often it was out across analog years.
  • court_cases.csv — the cases attached to its rights.
  • co_parties.csv — the other structures that were parties to those cases. Not available anywhere else.
  • call_climatology.csv — how often each right has been out of priority by week of season, with confidence intervals and the seasons the record could actually judge.
  • README.txt — provenance, methods, limits, disclaimer, and links back to DWR's own records for verification.

Where it sits

Location as DWR records it (diversion). Faint dots are the neighbouring water; click any to open it.

Current administration

● Fully called out — call at HOWELL DITCH (BOULDER CREEK, priority 1860-04-01).

Which of its rights are out of priority?

The outlook for the weeks ahead is not computable for this structure: no gage record for this year at this date, so there is nothing to find analogs for. Today’s position is a separate question, and it is answered in Current administration above — that screen reads the district’s active calls and needs no reference gage.

Where it sits in line

Priority 1860-06-01 — 41st most senior of the 1867 structures with decreed rights in this water districtDWR's administrative subdivision of a river basin; the unit calls are usually stated in..

Under prior appropriationColorado's rule for sharing water: first in time, first in right. Age decides, not proximity or need., everything ahead of it in this line is satisfied in full before it receives any water. Immediately ahead: SCHEARER DITCH (1860-06-01). Immediately behind: WILLIAM C HAKE DITCH (1860-06-01).

On COAL CREEK at river mile 2.4, it is 12th of 29 down the reach. Immediately upstream: EGGLESTON RES 4. Immediately downstream: EGGLESTON RES 3.

Position on the modelled network, not a claim about whose water this is — a stream carries water from many rights at once, and diverted water returns to it.

Decreed rights (2)

Admin noDWR's numeric encoding of a water right's seniority. Smaller is more senior; the integer part counts days from 1849-12-31 to the date that ranks the right. AppropriatedWhen water was first put to beneficial use. It sets seniority unless a prior adjudication date is later. AdjudicatedWhen the water court confirmed the right. A use decreed in 1975 was not a decreed use in 1955, however old the appropriation is. AbsoluteA right actually put to use, as opposed to conditional -- a placeholder for a use not yet made. ConditionalA right reserving a place in line for a use not yet made; it must be diligently pursued or it lapses. Alt-pointAn absolute amount decreed at another structure that may be diverted here instead -- an alternate point of diversion or an exchange. DWR calls this the APEX amount; a right showing 0.0 absolute but an alt-point amount is exercised here under another structure's decree. Decreed forWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on.Case
3805.00000 1860-06-011882-06-02 0.5 cfs 0.0 — Irrigation W7973
4504.00000 1862-05-011882-06-02 1.8 cfs 0.0 — Irrigation W7973

Amounts marked cfs are flow rates; AF are stored volumes (storage rights are decreed in acre-feet). An absolute amount of 0.0 beside an alt-point amount is not a dead right: the water is decreed at another structure, and that row records permission to divert it here instead (an alternate point or exchange). A case listing several numbers reflects the original decree plus later change cases.

How much of this decree was in priority, by day

A right is in priority on a day when it is senior to every call administering this structure. Of its 2.3 cfs decreed rate, the average day over the last 6 year(s) had 2.255 cfs in priority (98% of the decree). No call in effect is a free river — that was 9.6% of days.

On 49 days some rights were in priority and others were not — seniority splits a decree rather than switching it off. Calls are set and released at a time of day, not at midnight, so a day is counted by the hour: a call setting at 4pm costs that day a third of its rate, not all of it. A call began or ended mid-day on 28 of these days.

This is paper water. It is the decreed rate that was in priority — not water that was physically in the stream, and not water this structure diverted. A ditch can be in priority for 50 cfs on a day the creek carries five. What that distinction means →

YearMean in priority (Apr–Sep) Share of decreeFree-river days Days fully out
2026 2.0 cfs 87% 0 0
2025 2.3 cfs 100% 15 0
2024 2.3 cfs 100% 90 0
2023 2.3 cfs 100% 69 0
2022 2.3 cfs 100% 1 0
2021 2.23 cfs 97% 0 0
Show the last 120 days, day by day
DateIn priorityControlling call
2026-10-12 0.5 cfs (22%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-10-11 0.5 cfs (22%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-10-10 0.5 cfs (22%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-10-09 0.5 cfs (22%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-10-08 0.5 cfs (22%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-10-07 0.5 cfs (22%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-10-06 0.5 cfs (22%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-10-05 0.5 cfs (22%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-10-04 0.5 cfs (22%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-10-03 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-10-02 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-10-01 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-30 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-29 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-28 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-27 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-26 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-25 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-24 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-23 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-22 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-21 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-20 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-19 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-18 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-17 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-16 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-15 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-14 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-13 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-12 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-11 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-10 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-09 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-08 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-07 0.5 cfs (22%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-06 1.1 cfs (48%) BOULDER WELD CTY DITCH, 1861-06-01 · Boulder Creek · on a river this source flows into
2026-09-05 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-09-04 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-09-03 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-09-02 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-09-01 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-31 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-30 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-29 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-28 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-27 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-26 1.7 cfs (74%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-08-25 0.5 cfs (22%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-08-24 0.5 cfs (22%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-08-23 1.4 cfs (61%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-08-22 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-21 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-20 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-19 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-18 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-17 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-16 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-15 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-14 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-13 1.7 cfs (74%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-08-12 0.5 cfs (22%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-08-11 0.5 cfs (22%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-08-10 1.7 cfs (74%) HOWELL DITCH, 1860-10-01 · Boulder Creek · on a river this source flows into
2026-08-09 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-08 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-07 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-06 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-05 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-04 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-03 2.3 cfs (100%) RURAL DITCH, 1862-05-10 · Boulder Creek · on a river this source flows into
2026-08-02 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-08-01 2.3 cfs (100%) RURAL DITCH, 1862-09-15 · Boulder Creek · on a river this source flows into
2026-07-31 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-30 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-29 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-28 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-27 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-26 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-25 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-24 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-23 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-22 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-21 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-20 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-19 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-18 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-17 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-16 2.3 cfs (100%) RURAL DITCH, 1862-06-01 · Boulder Creek · on a river this source flows into
2026-07-15 2.3 cfs (100%) RURAL DITCH, 1862-09-15 · Boulder Creek · on a river this source flows into
2026-07-14 2.3 cfs (100%) RURAL DITCH, 1862-09-15 · Boulder Creek · on a river this source flows into
2026-07-13 2.3 cfs (100%) RURAL DITCH, 1862-09-15 · Boulder Creek · on a river this source flows into
2026-07-12 2.3 cfs (100%) RURAL DITCH, 1862-09-15 · Boulder Creek · on a river this source flows into
2026-07-11 2.3 cfs (100%) RURAL DITCH, 1862-09-15 · Boulder Creek · on a river this source flows into
2026-07-10 2.3 cfs (100%) RURAL DITCH, 1862-09-15 · Boulder Creek · on a river this source flows into
2026-07-09 2.3 cfs (100%) RURAL DITCH, 1862-09-15 · Boulder Creek · on a river this source flows into
2026-07-08 2.3 cfs (100%) RURAL DITCH, 1862-09-15 · Boulder Creek · on a river this source flows into
2026-07-07 2.3 cfs (100%) BOULDER CR MIN FLOW C, 1862-10-01 · Boulder Creek · on a river this source flows into
2026-07-06 2.3 cfs (100%) BOULDER CR MIN FLOW C, 1862-10-01 · Boulder Creek · on a river this source flows into
2026-07-05 2.3 cfs (100%) BOULDER CR MIN FLOW C, 1862-10-01 · Boulder Creek · on a river this source flows into
2026-07-04 2.3 cfs (100%) RURAL DITCH, 1862-10-01 · Boulder Creek · on a river this source flows into
2026-07-03 2.3 cfs (100%) RURAL DITCH, 1862-10-01 · Boulder Creek · on a river this source flows into
2026-07-02 2.3 cfs (100%) RURAL DITCH, 1862-10-01 · Boulder Creek · on a river this source flows into
2026-07-01 2.3 cfs (100%) RURAL DITCH, 1862-10-01 · Boulder Creek · on a river this source flows into
2026-06-30 2.3 cfs (100%) RURAL DITCH, 1862-10-01 · Boulder Creek · on a river this source flows into
2026-06-29 2.3 cfs (100%) RURAL DITCH, 1863-06-01 · Boulder Creek · on a river this source flows into
2026-06-28 2.3 cfs (100%) RURAL DITCH, 1868-05-01 · Boulder Creek · on a river this source flows into
2026-06-27 2.3 cfs (100%) RURAL DITCH, 1868-05-01 · Boulder Creek · on a river this source flows into
2026-06-26 2.3 cfs (100%) RURAL DITCH, 1868-05-01 · Boulder Creek · on a river this source flows into
2026-06-25 2.3 cfs (100%) RURAL DITCH, 1863-06-01 · Boulder Creek · on a river this source flows into
2026-06-24 2.3 cfs (100%) RURAL DITCH, 1863-06-01 · Boulder Creek · on a river this source flows into
2026-06-23 2.3 cfs (100%) RURAL DITCH, 1868-05-01 · Boulder Creek · on a river this source flows into
2026-06-22 2.3 cfs (100%) RURAL DITCH, 1868-05-01 · Boulder Creek · on a river this source flows into
2026-06-21 2.3 cfs (100%) RURAL DITCH, 1868-05-01 · Boulder Creek · on a river this source flows into
2026-06-20 2.3 cfs (100%) RURAL DITCH, 1868-05-01 · Boulder Creek · on a river this source flows into
2026-06-19 2.3 cfs (100%) RURAL DITCH, 1868-05-01 · Boulder Creek · on a river this source flows into
2026-06-18 2.3 cfs (100%) RURAL DITCH, 1870-06-01 · Boulder Creek · on a river this source flows into
2026-06-17 2.3 cfs (100%) RURAL DITCH, 1870-06-01 · Boulder Creek · on a river this source flows into
2026-06-16 2.3 cfs (100%) RURAL DITCH, 1870-06-01 · Boulder Creek · on a river this source flows into
2026-06-15 2.3 cfs (100%) RURAL DITCH, 1870-06-01 · Boulder Creek · on a river this source flows into
How this is worked out, and what it cannot tell you
  • This is a decreed rate that was in priority -- paper water, not water that was available or diverted.
  • Augmentation plans, exchanges and substitute supply plans let a structure divert lawfully while out of priority; none are modelled.
  • Calls on the river this source flows into are included without a position test, so curtailment can be over-reported where the calling point sits above the confluence.
  • DWR's administration is the authority. Scored against DWR's own call analysis, this method agreed on 95.5% of 85,822 structure-days (2026-08-29).
  • Calls considered for this structure: 3397, of which 3395 sit on a river it flows into.

How often is it out of priority?

Across the 11 seasons whose call record is complete enough to judge this structure (2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026), week by week from April.

most senior right · admin 3805.00000 · peaks at 5 of 11 seasons
AprMayJunJulAugSep
most junior right · admin 4504.00000 · peaks at 7 of 11 seasons
AprMayJunJulAugSep

Snow sets the clock here. In the driest third of snow years (3 seasons), the call settled in for the season around June 3; in 1 of them it never lifted at all. In the middle third (5 seasons), the call settled in for the season around June 24 (June 17 to July 8 across those years); in 1 of them it never lifted at all. In the wettest third (3 seasons), the call settled in for the season around June 24; in 2 of them it never lifted at all.

Snow years ranked by the district’s April 1 snow-water percentile across 3 SNOTEL sites; 11 seasons carry both a snow reading and a judgeable call record. How the past played out, not a forecast.

Why only 11 seasons, and what the bars mean

Each bar is one week: how many of those seasons that right was out of priority under a call this site can lawfully attribute to this structure. Green is never, red is every season on record.

The short record is a property of DWR's data, not of the river. A call only counts against a structure when we can establish it applies — by the districts named in its set comments, or by stream mile on the same source. DWR did not begin stating affected districts routinely until about 2015: fewer than one call in ten can be judged before then, against roughly two in three since. A season we cannot judge is not a season without calls, so it is dropped rather than counted as quiet — 12 seasons dropped here.

This is a frequency over past seasons, not a forecast. It says nothing about what the division engineer will do this year.

Recorded use (last 15 years on record)

Years far under the decreed amount? That gap has a name — paper water vs. wet water, explained on this structure.

In a median year this structure has a recorded diversion of 186 AF. Its most recent year on record, 2025, came in at 111 AF — 60% of that, and 3rd lowest of the 15 years with a recorded volume.

YearDiverted (AFA volume: one acre covered a foot deep, about 326,000 gallons -- roughly a suburban household's outdoor use for a year.)Compared with its own recordDays recordedPeak (cfs)
2008 250 9th lowest of 15 · 134% of median 90 2.3
2009 324 12th lowest of 15 · 174% of median 99 2.3
2010 929 15th lowest of 15 · 500% of median 131 7.6
2011 271 11th lowest of 15 · 146% of median 114 3.8
2012 186 8th lowest of 15 · 100% of median 95 2.7
2013 180 7th lowest of 15 · 97% of median 64 6.2
2014 327 13th lowest of 15 · 176% of median 74 4.9
2015 649 14th lowest of 15 · 349% of median 120 8.0
2017 138 5th lowest of 15 · 74% of median 44 2.3
2018 255 10th lowest of 15 · 137% of median 86 2.0
2019 123 4th lowest of 15 · 66% of median 59 2.0
2020 25 2nd lowest of 15 · 13% of median 27 1.8
2021 156 6th lowest of 15 · 84% of median 41 13.0
2024 6 1st lowest of 15 · 3% of median 61 0.2
2025 111 3rd lowest of 15 · 60% of median 304 1.3

How good is our record of it?

Grade B (8/10 points) — the components below are the finding; the letter alone is not.

The rubric, component by component
CheckStateDetail
identity complete name, type, and water source all on file
decreed rights on file 2 right(s), seniority decoded
diversion record current 3221 measured days, newest 331 day(s) before the data's end (DWR publishes ~1 year in arrears)
record continuity sparse 20% of the irrigation seasons in 1951-2025 carry measured days
published-record stability stable no upstream revisions recorded against this structure

Advisory reading aid on public data — not an administrative or legal conclusion, not a title opinion, and not a substitute for DWR administration or an engineer's analysis. Methodology review status is disclosed at hydrohistorian's basin pages.

Hydrohistorian is free, with no ads — one server and a lot of public records. If it earns its keep, you can help keep it running.