LOWER LATHAM DRAIN ☆ My Water

The record and the river

In short

LOWER LATHAM DRAIN holds 1 decreed right on SOUTH PLATTE RIVER. As of 2026-10-02, 0 of them are out of priority under a call at admin 17332.00000 placed by SOUTH PLATTE RIVER COMPACT. Its 1 most senior right, back to 1889-03-01, keeps diverting. 5 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 9,523 acre-feet. That use is falling by about 697.2 acre-feet a year over 15 years (p=0.002153493458012523). It was a party to 6 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 (14 checked). The detail, with its method, is in the cards below.

Current administration

● In priority — no active call senior to this structure's rights affects its district (19 active call(s) checked).

5 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?

Under today's controlling call (SOUTH PLATTE RIVER COMPACT, priority 1897-06-13): 0 of this structure's 1 rights are out of priority now. (5 call(s) state no district and sit outside this one — not judged, not assumed.) In the 5 past years most like this one (2025, 2021, 2018, 2020, 2017), 0 of the rights shown below were out at least one week in at least one analog year.

Where it sits in line

Priority 1889-03-01 — 838th most senior of the 21886 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: 0203843 (1887-09-12)☆. Immediately behind: 0203845 (1889-09-01)☆.

On MAINSTEM at river mile 168.5, it is 875th of 890 down the reach. Immediately upstream: CAPITAL DIVERSION☆. Immediately downstream: FARMERS IND D CENTRAL 2 AUG RT☆.

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 (1)

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 35.0 cfs decreed rate, the average day over the last 6 year(s) had 29.112 cfs in priority (83% of the decree). No call in effect is a free river — that was 14.3% of days.

On 54 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 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 →

Legal record & documents

15 decreed actions on record across 8 court cases: CA54658, 88CW0264B, 20CW3213, 19CW3084, 13CW3057, 03CW0047, 02CW0404, 02CW0245.

567 imaged documents on DWR’s shelf for this structure — 565 water-court documents across 8 cases, including 8 decrees. Every row opens the scanned PDF at DWR. Listing as of 2026-08-31.

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 0200891 ↗ (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 →

Filings that would move water above this headgate

2 water-court applications in the monthly resumes name a structure on SOUTH PLATTE RIVER 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.

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 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.

Structures it shares court cases with

This structure was a party to 6 court cases that also touched 3 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.

Also a party to 1 omnibus adjudication (CA54658, 104 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 9,523 AF. Its most recent year on record, 2025, came in at 3,033 AF — 32% of that, and 2nd lowest of the 15 years with a recorded volume.

Trends for this structure

Recorded use is falling over its last 15 recorded years (-697 AF/yr, Mann-Kendall p=0.002).

Its reference gage, Farmers Independent Ditch Tail: no clear flow trend.

Every gage and reach in this district →

How good is our record of it?

Grade A (9/10 points) — the components below are the finding; the letter alone is not.