Reservoir · Arizona · United States · USGS NWIS
HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ
26.9% full
Capacity
162.11 hm³
Volume stored
44 hm³
Coordinates
33.985°N, 111.710°W
Last updated
2026-07-29
Current fill
26.9%vs 7 days ago
-0.2%losing
vs 1 year ago
-14.0%year-over-year
7-day trend
→stable
Data source: USGS National Water Information System (NWIS) — 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: 2026-07-29.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 33.985, -111.710 · Open in Google Maps
About HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ
As of July 29, 2026, HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ is filled to 26.9% of its total capacity, holding roughly 44 hm³ of water out of a maximum 162 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-0.2 pts), and it is 14.0 points below its level on the same date a year earlier.
Across the readings we hold for HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ — 1461 data points between July 30, 2022 and July 29, 2026 — the level has ranged from a low of 3.6% (July 30, 2022) to a high of 82.8% (May 21, 2023). On average the reservoir is fullest around May and at its lowest around November.
It is operated by USGS primarily for multiple purposes. It lies within the Arizona basin at 33.985°N, 111.710°W.
Key facts
- Current fill level
- 26.9%
- Water stored
- 44 hm³
- Total capacity
- 162 hm³
- 7-day change
- ▼ 0.2 pts
- Year-on-year
- ▼ 14.0 pts
- Primary use
- Multipurpose
- River basin
- Arizona
- Operator
- USGS
- Coordinates
- 33.985°N, 111.710°W
- Last updated
- July 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Jul 2026 | 26.9% | 44 |
| 28 Jul 2026 | 27.1% | 44 |
| 27 Jul 2026 | 27.3% | 44 |
| 26 Jul 2026 | 27.4% | 44 |
| 25 Jul 2026 | 27.5% | 45 |
| 24 Jul 2026 | 27.5% | 45 |
| 23 Jul 2026 | 27.5% | 45 |
| 22 Jul 2026 | 27.4% | 44 |
| 21 Jul 2026 | 27.2% | 44 |
| 20 Jul 2026 | 27.1% | 44 |
| 19 Jul 2026 | 26.9% | 44 |
| 18 Jul 2026 | 26.8% | 43 |
Frequently asked questions
What is the current water level of HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ?
As of July 29, 2026, HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ is at 26.9% of its capacity, holding approximately 44 hm³ of water, according to USGS NWIS data.
Is HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ reservoir full?
No. As of July 29, 2026, HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ is low at 26.9% of its capacity, so it is not full.
Is the water level at HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ rising or falling?
The level at HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ has been broadly stable over the latest week on record (-0.2 points).
How much water can HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ hold?
HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ has a total capacity of 162 hm³.
Where is HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ reservoir located?
HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ is located in Arizona, United States, within the Arizona basin (coordinates 33.985°N, 111.710°W).
What is HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ used for?
HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ is used primarily for multiple purposes, and is managed by USGS.