45.687247, -92.295607 · Polk County ·
NID WI00022. Tap the map to open this water in the
live app.
What the runs do here
Clam River carries no anadromous run on our corridor map, so
this page makes no claim about salmon or steelhead at this dam. What it sits on is coldwater —
resident trout water — and the section below says which classification says so.
The structure
Owner
Polk County Local Government
Purpose
Hydroelectric, Recreation
Completed
1875 · modified 1942O
Type
Gravity
Height
36 ft
Length
80 ft
Spillway
Controlled
Storage
950 acre-ft · 127 acre pool
Drainage
65 sq mi
Condition
Poor · Significant hazard potential
From the National Inventory of Dams (USACE). Hazard potential is a
downstream-consequence classification, not a statement about the structure's condition.
The water above and below
Clam River
0.0 mi from the dam · Class II · wild supplemented (WDNR)
McKenzie Creek
0.89 mi from the dam · Class I · wild (WDNR) · typed Cold
Coldwater designation is the state's own classification. A dam sits on one river and this list
is every designated reach within a mile and a half of it, so a tributary mouth shows up here too.
Live from USGS. A gauge miles away
is a gauge miles away — the distance column is there so you can discount it. A hydro dam's
releases move the flow below it on a schedule the gauge sees and this page does not.
1 of the gauges above
is not sending water temperature at
all — a stopped gauge still answers with the last value it ever sent and nothing to say so, so
those rows carry a modelled figure where one can be fitted, marked as modelled, and a dash
where it cannot.
Public access sites near the dam, straight-line distance. A dam itself is private property
unless its owner says otherwise; these are the places the state lists as open.