Riverdale Flowage
St Croix County, Wisconsin · WBIC 2614600
The DNR lists this lake's watershed (Balsam Branch-Apple River) as suspect or infected with VHS, a fish virus. The listing covers the watershed, not a test of this lake. About VHS
Size
75 acres
Max depth
20 ft
DNR lake type
Complex, Riverine
Water clarity
5.2 ft
Moderate, measured Jul 2003
A river-like water type, with flow instead of a still basin. This describes the lake type in general, not this lake in particular.
Outline
Numbered dots are boat landings; tap one for directions. The list below has the same numbers. Drawn from the DNR's 24K hydrography (surveyed 1974), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
5.2 ft Secchi depthModerateOlder reading
Last measured Jul 24, 2003. 4 readings on record, 2003.
Only a few readings are on record.
Nothing has been measured in the last 5 years, so this may not match the lake today.
Secchi depth is how far down a white disk stays visible. A bigger number means clearer water. Clear means a Secchi depth of 10 feet or more, moderate 5 to 10 feet, low under 5 feet.
Wisconsin DNR water monitoring (volunteer and staff), via the Water Quality Portal; station RIVERDALE FLOWAGE - DEEP HOLE. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 9 (Apr 2 to Apr 22)
- Surface reaches 48°Fabout Apr 19 (Apr 10 to Apr 25)
- Surface reaches 64°Fabout May 9 (Apr 30 to May 13)
- June surface75°F, usually 74 to 76°F
- July surface81°F, usually 79 to 82°F
- August surface76°F, usually 75 to 78°F
Forms a warm top layer around May 2, lasting about 148 days.
A computer model of this lake's typical weather and water, built from 15 years, 2005 to 2019. Ranges show the middle half of years. The model was not calibrated against measured temperatures for this lake. It is an estimate, not a measurement.
Modeled: U.S. Geological Survey lake temperature data release (doi:10.5066/P9CA6XP8).
Today at the lake
Forecast: National Weather Service (no endorsement implied). Sunrise, sunset and moon phase are calculated. The moon phase can be a day off.
Boat landings
- 1Riverdale Flowage (listed under St. Croix County)Boat ramp · Concrete surface · Township
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in St Croix County
- Turtle Lake1.6 miles away
- Apple Lake2.9 miles away
- Strand Lake3.4 miles away
- Hatfield Lake4.7 miles away
- New Richmond Flowage5.0 miles away
- Bass Lake5.1 miles away
Where this comes from
- Size, depth and lake typeWisconsin DNR lake classifications, checked Oct 23, 2026
- OutlineWisconsin DNR 24K hydrography, checked Oct 23, 2026
- Regulations linkWisconsin DNR fishing regulations (linked, not restated), checked Oct 23, 2026
- Boat landingsWisconsin DNR public boat access sites, checked Oct 23, 2026
- Water clarityWisconsin DNR water monitoring, via the Water Quality Portal, checked Oct 23, 2026
- Typical-year temperatureU.S. Geological Survey lake temperature model (modeled estimate), checked Oct 23, 2026
- VHS statusWisconsin DNR VHS status by watershed, checked Oct 24, 2026
- Depth map linkWisconsin DNR lake maps list, checked Oct 24, 2026
See data sources for what each source covers, and about for how the numbers are matched to lakes.
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