Armourdale Dam Lake
Towner County, WisconsinLimited DataMesotrophic
Armourdale Dam Lake is a 80-acre mesotrophic lake in Towner County, ND. Water quality is graded C based on 1 sampling years through 2025. Compared to the 1 other monitored lakes in Towner County, Armourdale Dam Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2025-10-01. Grade methodology: LakeGrade methodology.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 7.2 ft. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.2 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 79.8 acres |
Location
County Ranking
Ranked #2 of 2 lakes in Towner County
Cleaner Lakes Within 30 Miles
Armourdale Dam Lake holds Grade C. 2 nearby lakes hold higher grades.
- BGordon Center LakeRolette County · 16.5 mi · Higher grade (C → B)
- BWheaton LakeRolette County · 17 mi · Higher grade (C → B)
Nearby Lakes in Towner County
More Wisconsin Lake Rankings
Other Grade C Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Armourdale Dam Lake is a man-made reservoir impounded by the Armourdale Dam (completed 1961), built primarily for fish and wildlife pond on the Badger Coulee-TR; earth-type dam, 46 ft tall and 650 ft long.
- Surface area
- 79.8 ac
- Normal storage
- 1,123 ac-ft
- Max storage
- 2,162 ac-ft
- Drainage area
- 17 sq mi
- Hazard class
- Significant
- Owner
- ND Game & Fish
All listed purposes: Fish and Wildlife Pond;Recreation.
Source: USACE National Inventory of Dams, NID ID ND00008 · Operator website
EPA Impairment Status
Armourdale Dam Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit ND-09020315-006-L_00 · Official waterbody report
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-10-01
Monitoring stations: 1