LOWER BOULDER DITCH ☆ My Water

The record and the river

Where this structure is measured

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

19.07 cfs as of 2026-10-12 08:15 (3.7 h ago)

Provisional 15-minute telemetry from LWBDITCO ↗ (LOWER BOULDER 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

LOWER BOULDER DITCH holds 26 decreed rights on BOULDER CREEK. As of 2026-09-27, 25 of them are out of priority under a call at admin 3744.00000 placed by HOWELL DITCH. Its 1 most senior right, back to 1859-10-01, keeps diverting. 7 further calls state no district and sit outside this one, so they are counted here rather than assumed either way. In a median year over its last 15 recorded years it diverts 14,950 acre-feet. It was a party to 13 court cases that also touched 37 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.

Current administration

● Junior rights called out — call at RURAL DITCH (BOULDER CREEK, priority 1862-05-09).

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

Which of its rights are out of priority?

Under today's controlling call (HOWELL DITCH, priority 1860-04-01): 25 of this structure's 26 rights are out of priority now. (7 call(s) state no district and sit outside this one — not judged, not assumed.) In the 4 past years most like this one (2024, 2022, 2025, 2023), 5 of the rights shown below were out at least one week in at least one analog year.

Where it sits in line

Priority 1859-10-01 — 1st 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 behind: COMMUNITY DITCH (1859-10-01)☆.

On MAINSTEM at river mile 19.9, it is 34th of 78 down the reach. Immediately upstream: KUGELER PIPELINE 1☆. Immediately downstream: BULL HEAD GULCH P L☆.

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 (26)

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 351.389 cfs decreed rate, the average day over the last 6 year(s) had 225.713 cfs in priority (64% of the decree). No call in effect is a free river — that was 14.1% of days.

On 1416 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 36 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 →

Legal record & documents

97 decreed actions on record across 25 court cases: 05CW0295, 97CW0195, 96CW1101, 90CW0108, 97CW0140, 85CW0406, 99CW0191, 93CW0025, 79CW0387, 02CW0281 and 15 more below.

595 imaged documents on DWR’s shelf for this structure — 501 water-court documents across 41 cases, including 42 decrees. Every row opens the scanned PDF at DWR. Listing as of 2026-09-03.

Imaged documents at DWR. DWR keeps the scanned documents for this structure — decrees, rulings, plats, correspondence — in its Laserfiche archive. Open the list directly: imaged documents for 0600538 ↗ (indexed by structure, not by case — the cases listed above appear within the list).

Other DWR records for this structure: DWR’s page for this structure ↗ — net amounts, water rights, transactions & adjudication history, and diversion records, all on that one page. On this site: the district’s full legal picture →

Water-court filings naming this structure

4 applications in the monthly water-court resumes explicitly reference this WDID. The resume is the earliest public notice of a new claim (C.R.S. 37-92-302) — years before anything reaches the decree record below. Most applications name structures by name rather than WDID, so absence here is weak evidence of absence.

Source: Judicial Branch combined monthly resumes (archive), indexed nightly; WDIDs attached only when a 7-digit token in the filing matches DWR’s structure inventory.

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.

Structures it shares court cases with

This structure was a party to 13 court cases that also touched 37 other structures — changes of water right, augmentation plans, exchanges. Being parties to the same case does not by itself mean water moved between them; which way it ran, and how much, is in the decree.

1 further shared case not shown — the most specific are listed first, since a case binding two structures says more than one binding a dozen.

Also a party to 9 omnibus adjudications (CA6672, 77 structures; CA4842, 58 structures; 80CW0468, 28 structures). Those settled many rights at once and are listed separately: they say these structures were adjudicated together, not that they deal with each other.

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 14,950 AF. Its most recent year on record, 2025, came in at 17,538 AF — 117% of that, and 12th lowest of the 15 years with a recorded volume.

This structure records both diversions and reservoir releases — they are separate water movements and are accounted separately below.

Call-derived yield: senior right divertible 100.0% of a median season / 100.0% dry-year.

Trends for this structure

Recorded use shows no clear trend over its last 15 recorded years — which is itself worth knowing.

Its reference gage, Lower Boulder Ditch: no clear flow trend.

Every gage and reach in this district →

How good is our record of it?

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