Greenwood Reservoir water level — Michigan
Greenwood Reservoir in Michigan was last measured at 1,512.55 ft (datum NAVD88), as of Aug 31, 2026, 2:30 AM (UTC-05:00) (USGS Water Services). Over its recent trend window the level has been falling (−1.7 ft). This reading is provisional and subject to revision.
- % of conservation pool full
- Not reported
- Storage
- Not reported
- Recent trend
- ↓Falling
−1.7 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 04057811, 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 67 sq mi of contributing watershed.
The dam behind Greenwood Reservoir
Greenwood Reservoir is held back by Greenwood Reservoir Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 60 ft high and running 4,400 ft along its crest , built across M Br Escanaba River in Marquette County , near Gwinn . It was completed in 1973 , and is owned by Tilden Magnetite Partnership (a private owner) .
Its recorded primary purpose is water supply — delivering water to its customers comes first, so drawdown here follows demand as much as it follows rainfall .
Its spillway is gated, so the operator can hold the pool above the spillway crest and meter what leaves. The spillway opening is 280 ft wide.
NID classes it significant hazard potential: a failure would be expected to damage property and infrastructure rather than cost lives. It is a consequence rating, not a condition rating. Its most recent condition assessment was satisfactory — no deficiencies recognised for expected loading. That assessment is dated 12/01/2016.
At its normal pool the reservoir covers about 1,112 acres. NID records a maximum storage of 22,750 acre-ft against a normal storage of 18,000 acre-ft. Its maximum discharge capacity is 23,700 cubic feet per second. It is regulated by MICHIGAN DEGLE.
Dam facts: National Inventory of Dams record MI00487 , filed by Michigan — 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 →)
Other gauges at this site
A second gauge reports at this same structure. Its readings are listed here rather than on a separate page, because it measures the same water.
| Gauge | Source | Elevation | Storage |
|---|---|---|---|
| Greenwood Afterbay | USGS site 04057812 | 1,480.91 ft (NAVD88) | — |
How Greenwood Reservoir compares nearby
4 of 6 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 |
|---|---|---|---|
| Greenwood Afterbay | MI | 1,480.91 ft | 0 km |
| Schweitzer Reservoir | MI | 1,336.25 ft | 12 km |
| Lac Vieux Desert | WI | 1,680.47 ft | 110 km |
| Anvil Lake | WI | 1,692.11 ft | 111 km |
| Cisco Lake | MI | 1,683.52 ft | 129 km |
| Lake Gogebic | MI | 1,294.73 ft | 135 km |
Frequently asked questions
- What is the current water level of Greenwood Reservoir?
- As of Aug 31, 2026, 2:30 AM (UTC-05:00), the pool elevation was 1,512.55 ft (datum NAVD88), provisional and subject to revision. See the trend chart above for the recent direction.
- Is Greenwood Reservoir 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 04057811, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00).
More in Michigan
See every lake tracked in Michigan, or read the methodology behind these figures.