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SMITH EMMONS DITCH

Structure dossier · WDID 0600553 · DITCH · BOULDER 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 08:47 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.

Who owns it

  • The Smith and Emmons Ditch Company (nonprofit corporation) — probable match, from the Colorado Secretary of State business record ↗; verify before relying on it. A nonprofit corporation of this name, in good standing, with its principal office in Longmont; matched on the name and the location, not confirmed by the company.

DWR’s own records name no owner for a ditch, reservoir or well, so this comes from the source shown and can be out of date. Organisations only: a private landowner’s name is never listed.

The record and the river

Where this structure is measured

GageFlowing nowRecordHow we know
SMITH EMMONS DITCH SMEMDICO 0.0 cfs 2023–2026, 1,069 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 05:15 (3.5 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 SMEMDICO ↗ (SMITH EMMONS 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

SMITH EMMONS DITCH holds 2 decreed rights on BOULDER CREEK. No active call senior to its rights reaches its district today (20 active calls checked), so it is in priority now. 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: only 3 analog year(s) have both flow and a complete administration record; 4 needed. In a median year over its last 15 recorded years it diverts 627 acre-feet. It was a party to 1 court cases that also touched 4 other structures.

Assembled from the figures on this page — every number above is checked against them before it is shown (9 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

● In priority — no active call senior to this structure's rights affects its district (20 active call(s) checked).

7 further calls state no district and sit outside this one, so they are counted here rather than assumed either way.

Which of its rights are out of priority?

The outlook for the weeks ahead is not computable for this structure: only 3 analog year(s) have both flow and a complete administration record; 4 needed. 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 1863-06-01 — 76th 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: 0602417 (1863-05-01). Immediately behind: 0605866 (1863-06-06).

On MAINSTEM at river mile 29.1, it is 72nd of 78 down the reach. Immediately upstream: STROMQUIST POND 4. Immediately downstream: STROMQUIST POND 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
4900.00000 1863-06-011882-06-02 47.16 cfs 0.0 — Irrigation CA1288
52698.00000 1994-04-131994-12-31 0.0 cfs 50.0 cfs — Storage, Irrigation +8 94CW0062

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 47.16 cfs decreed rate, the average day over the last 6 year(s) had 47.16 cfs in priority (100% of the decree). No call in effect is a free river — that was 14.3% of days.

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 42 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 47.16 cfs 100% 1 0
2025 47.16 cfs 100% 40 0
2024 47.16 cfs 100% 115 0
2023 47.16 cfs 100% 71 0
2022 47.16 cfs 100% 34 0
2021 47.16 cfs 100% 1 0
Show the last 120 days, day by day
DateIn priorityControlling call
2026-10-12 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-10-11 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-10-10 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-10-09 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-10-08 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-10-07 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-10-06 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-10-05 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-10-04 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-10-03 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-10-02 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-10-01 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-09-30 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-09-29 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-09-28 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1885-11-20 · South Platte River · on a river this source flows into
2026-09-27 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1885-11-20 · South Platte River · on a river this source flows into
2026-09-26 47.16 cfs (100%) LOWER PLATTE BEAVER D, 1888-04-15 · South Platte River · on a river this source flows into
2026-09-25 47.16 cfs (100%) LOWER PLATTE BEAVER D, 1888-04-15 · South Platte River · on a river this source flows into
2026-09-24 47.16 cfs (100%) LOWER PLATTE BEAVER D, 1888-04-15 · South Platte River · on a river this source flows into
2026-09-23 47.16 cfs (100%) LOWER PLATTE BEAVER D, 1888-04-15 · South Platte River · on a river this source flows into
2026-09-22 47.16 cfs (100%) LOWER PLATTE BEAVER D, 1888-04-15 · South Platte River · on a river this source flows into
2026-09-21 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-09-20 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-09-19 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-09-18 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-09-17 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-09-16 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-09-15 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-09-14 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-09-13 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-09-12 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-09-11 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-09-10 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-09-09 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-09-08 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-09-07 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-09-06 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-09-05 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-09-04 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-09-03 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-09-02 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-09-01 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-08-31 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-08-30 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-08-29 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-08-28 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-08-27 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-08-26 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-08-25 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-08-24 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-08-23 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-08-22 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-08-10 · South Platte River · on a river this source flows into
2026-08-21 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-08-20 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-08-19 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-08-18 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-08-17 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-08-16 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-15 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-14 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-13 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-12 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-11 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-10 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-09 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-08 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-07 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-06 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-05 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-04 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-03 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-02 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-01 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-31 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-30 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-29 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-28 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-27 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-26 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-25 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-24 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-23 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-22 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-21 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-20 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-19 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-18 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-17 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-16 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-15 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-14 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-13 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-12 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-11 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-10 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-09 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-08 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-07 47.16 cfs (100%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-06 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-07-05 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-07-04 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-07-03 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-07-02 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-07-01 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-30 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-29 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-28 47.16 cfs (100%) HARMONY DITCH 1, 1897-05-03 · South Platte River · on a river this source flows into
2026-06-27 47.16 cfs (100%) WESTERN MUTUAL DITCH, 1885-11-20 · South Platte River · on a river this source flows into
2026-06-26 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-25 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-24 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-23 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-22 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-21 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-20 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-19 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-18 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-17 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-16 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-15 47.16 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · 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: 3564, of which 3564 sit on a river it flows into.

Filings that would move water above this headgate

5 water-court applications in the monthly resumes name a structure on BOULDER CREEK upstream of this headgate. A new right, exchange or change of use up there changes what arrives down here — the resume is the public notice, and the opposition window is how anyone affected answers it.

MonthCaseWhat it asksUpstream structuresOppose by
2026-08 2026CW3125 reasonable diligence LOWER BOULDER DITCH (9.2 mi up), LAFAYETTE BLDR C ALT PT (12.5 mi up) 2026-10-31 (18d)
2026-06 2026CW3093 reasonable diligence LOWER BOULDER DITCH (9.2 mi up), LAFAYETTE BLDR C ALT PT (12.5 mi up) 2026-08-31
2025-10 2025CW3137 reasonable diligence LOWER BOULDER DITCH (9.2 mi up), LAFAYETTE BLDR C ALT PT (12.5 mi up) 2025-12-31
2025-04 2025CW3049 reasonable diligence LOWER BOULDER DITCH (9.2 mi up), LAFAYETTE BLDR C ALT PT (12.5 mi up) 2025-06-30
2025-03 2025CW3034 reasonable diligence, make absolute RURAL DITCH (0.3 mi up) 2025-05-31

Judged on this structure’s own named stream only — a filing on a tributary that joins upstream is not judged here. Filings that name structures only in prose, without a WDID, are invisible to this card. Reading aid, not legal advice; the deadline is computed from C.R.S. 37-92-302(3), and the court’s own notice controls.

How often is it out of priority?

Across the 12 seasons whose call record is complete enough to judge this structure (2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026), week by week from April.

most senior right · admin 4900.00000 · peaks at 7 of 12 seasons
AprMayJunJulAugSep
most junior right · admin 52698.00000 · peaks at 12 of 12 seasons
AprMayJunJulAugSep

Snow sets the clock here. In the driest third of snow years (4 seasons), the call settled in for the season around June 3; in 1 of them it never lifted at all. In the middle third (4 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 (4 seasons), the call settled in for the season around June 24 (June 17 to June 24 across those years); 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; 12 seasons carry both a snow reading and a judgeable call record. How the past played out, not a forecast.

Why only 12 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 — 11 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 627 AF. Its most recent year on record, 2025, came in at 1,029 AF — 164% of that, and 13th 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)
2010 617 7th lowest of 15 · 98% of median 68 8.0
2011 294 3rd lowest of 15 · 47% of median 47 5.0
2012 908 12th lowest of 15 · 145% of median 107 8.0
2013 417 5th lowest of 15 · 66% of median 40 9.9
2014 386 4th lowest of 15 · 62% of median 42 9.1
2015 627 8th lowest of 15 · 100% of median 59 9.5
2016 868 11th lowest of 15 · 138% of median 91 9.3
2017 536 6th lowest of 15 · 86% of median 54 6.6
2018 285 2nd lowest of 15 · 46% of median 21 9.3
2019 837 10th lowest of 15 · 134% of median 75 9.0
2020 1,211 14th lowest of 15 · 193% of median 127 20.7
2021 672 9th lowest of 15 · 107% of median 118 7.9
2023 2 1st lowest of 15 · 0% of median 7 0.2
2024 1,318 15th lowest of 15 · 210% of median 185 6.8
2025 1,029 13th lowest of 15 · 164% of median 179 8.0

How good is our record of it?

Grade A (9/10 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 7052 measured days, newest 331 day(s) before the data's end (DWR publishes ~1 year in arrears)
record continuity patchy 44% of the irrigation seasons in 1950-2025 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.

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