LOWER BOULDER EXT RES ☆ 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

0.56 cfs as of 2026-10-13 09:15 (1.6 h ago)

Provisional 15-minute telemetry from MILVINCO ↗ (MILAVEC RESERVOIR INLET (AKA LOWER BOULDER EXT RES.)). 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 EXT RES holds 2 decreed rights on BOULDER CREEK. A call at RURAL DITCH on BOULDER CREEK (1862-05-09), and 1 other 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: only 3 analog year(s) have both flow and a complete administration record; 4 needed. In a median year over its last 11 recorded years it diverts 424 acre-feet. That use is rising by about 69.4 acre-feet a year over 11 years (p=0.0426072043398007).

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

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

● Fully called out — call at HOWELL DITCH (BOULDER CREEK, priority 1859-12-01).

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 1892-02-01 — 173rd 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: THOMAS RES (1891-05-01)☆. Immediately behind: MESA RES (1893-12-04)☆.

On MAINSTEM at river mile 29.0, it is 70th of 78 down the reach. Immediately upstream: STROMQUIST POND 5☆. Immediately downstream: STROMQUIST POND 4☆.

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)

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.

Legal record & documents

4 decreed actions on record across 2 court cases: 17CW3216, CA4842.

101 imaged documents on DWR’s shelf for this structure — 23 water-court documents across 2 cases, including 2 decrees. Every row opens the scanned PDF at DWR. Listing as of 2026-09-04.

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 0604182 ↗ (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 →

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

Also a party to 1 omnibus adjudication (CA4842, 58 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 424 AF. Its most recent year on record, 2023, came in at 516 AF — 122% of that, and 7th lowest of the 11 years with a recorded volume.

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

Trends for this structure

Recorded use is rising over its last 11 recorded years (+69 AF/yr, Mann-Kendall p=0.043).

Its reference gage, Smith Emmons Ditch: no clear flow trend.

Every gage and reach in this district →

How good is our record of it?

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