John Martin Reservoir at Caddoa water level — Colorado
John Martin Reservoir at Caddoa in Colorado was last measured at 3,801.42 ft (datum NGVD29), as of Aug 31, 2026, 1:15 AM (UTC-06:00) (USGS Water Services). Over its recent trend window the level has been falling (−1.5 ft). This reading is provisional and subject to revision.
- % of conservation pool full
- Not reported
- Storage
- 21,797 acre-ft
- Recent trend
- ↓Falling
−1.5 ft over the trend window
Recent trend
Readings this station published between Jun 2, 2026 and Aug 31, 2026 — a 89-day window — downsampled for display.
Data: USGS Water Services (waterservices.usgs.gov) and USACE CWMS Data (cwms-data.usace.army.mil), retrieved 2026-08-31. Both public domain (a work of the U.S. Government, 17 U.S.C. §105).
Source: USGS site 07130000 · USACE SPA/John Martin, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for this lake →
About this gauge's record
This site's drainage basin covers approximately 18,915 sq mi of contributing watershed.
The dam behind John Martin Reservoir at Caddoa
John Martin Reservoir at Caddoa is held back by John Martin Dam (also recorded as John Martin Reservoir; Caddoa Dam) , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 25 ft high and running 13,000 ft along its crest , built across ARKANSAS in Bent County , near LAMAR . It was completed in 1943 , and is owned by USACE - Albuquerque District (a federal owner) , to a design credited to CESPA.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain . It also serves flood risk reduction;other;irrigation.
It has a concrete core. Its spillway is gated, so the operator can hold the pool above the spillway crest and meter what leaves. The spillway opening is 0 ft wide. Its outlet works use none0;vertical lift0.
NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in.
At its normal pool the reservoir covers about 11,590 acres. NID records a maximum storage of 608,245 acre-ft against a normal storage of 345,250 acre-ft. Its maximum discharge capacity is 0 cubic feet per second. It is regulated by DWR.
Dam facts: National Inventory of Dams record CO01283 , filed by US Army Corps of Engineers — U.S. Army Corps of Engineers, public domain. Water levels above come from USGS Water Services and are a separate source. (How this dam was matched to this gauge →)
How John Martin Reservoir at Caddoa compares nearby
3 of 5 nearby lakes with a current trend are also falling right now.
Nearby lakes
The six nearest published lakes by centroid distance (great-circle) — cross-state neighbors included.
| Lake | State | Level | Distance |
|---|---|---|---|
| Pueblo Reservoir | CO | 4,859.70 ft | 158 km |
| Lake Maloya | NM | 7,509.01 ft | 175 km |
| Trinidad Lake | CO | 6,171.72 ft | 176 km |
| Kettle Creek Dry Dam | CO | 6,545.68 ft | 191 km |
| Costilla Reservoir | NM | — | 246 km |
| Palo Duro Reservoir | TX | 2,826.32 ft | 246 km |
Frequently asked questions
- What is the current water level of John Martin Reservoir at Caddoa?
- As of Aug 31, 2026, 1:15 AM (UTC-06:00), the pool elevation was 3,801.42 ft (datum NGVD29), provisional and subject to revision. See the trend chart above for the recent direction.
- Is John Martin Reservoir at Caddoa full right now?
- Its managing agency does not publish a %-of-conservation-pool-full figure for this lake, so we show the bare level rather than estimate one.
- Where does this data come from?
- From USGS site 07130000 · USACE SPA/John Martin, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00).
More in Colorado
See every lake tracked in Colorado, or read the methodology behind these figures.