Reservoir · Colorado · United States · BOR RISE
Carter Lake Reservoir
Carter Lake Reservoir and Dam
51.0% full
Capacity
138.43 hm³
Volume stored
71 hm³
Vs month average
78% of normal
Coordinates
40.324°N, 105.212°W
Last updated
2026-10-28
Current fill
51.0%vs 7 days ago
-1.7 pplosing
vs 1 year ago
-5.5 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
78%of normal
51.0% full on 2026-10-28, against an average of 65.1% for October across 6 years of readings (-14.1 points).
Drought Monitor at this site · 27 October 2026
D3extreme drought
The ground at Carter Lake Reservoir's coordinates falls inside the D3 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Colorado drought figures →
Data source: BOR RISE — US Bureau of Reclamation — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-10-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.324°N, 105.212°W · Open in Google Maps
About Carter Lake Reservoir
As of October 28, 2026, Carter Lake Reservoir is filled to 51.0% of its total capacity, holding 70.63 hm³ of water out of a maximum 138.43 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 1.7 percentage points, and it is 5.5 points below its level on the same date a year earlier.
Across the readings we hold for Carter Lake Reservoir — 1951 data points between October 30, 2021 and October 28, 2026 — the level has ranged from a low of 45.9% (December 27, 2022) to a high of 99.9% (July 10, 2023). On average the reservoir is fullest around May and at its lowest around November.
It is operated by BOR primarily for multiple purposes. It is at 40.324°N, 105.212°W.
Key facts
- Current fill level
- 51.0% of total capacity
- Water stored
- 70.63 hm³
- Total capacity
- 138.43 hm³
- 7-day change
- ▼ 1.7 pp
- Year-on-year
- ▼ 5.5 pp
- Primary use
- Multipurpose
- Operator
- BOR
- Coordinates
- 40.324°N, 105.212°W
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 51.0% | 70.63 |
| 27 Oct 2026 | 51.3% | 70.97 |
| 26 Oct 2026 | 51.5% | 71.33 |
| 25 Oct 2026 | 51.8% | 71.69 |
| 24 Oct 2026 | 52.0% | 71.97 |
| 23 Oct 2026 | 52.3% | 72.35 |
| 22 Oct 2026 | 52.5% | 72.67 |
| 21 Oct 2026 | 52.7% | 73 |
| 20 Oct 2026 | 53.0% | 73.34 |
| 19 Oct 2026 | 53.3% | 73.77 |
| 18 Oct 2026 | 53.7% | 74.28 |
| 17 Oct 2026 | 54.0% | 74.72 |