Beck Lake D
Park County, Wyoming110 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Limited data
Beck Lake D in Park County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 90 µg/L. Surface area: 110 acres.
- Area
- 110 acres
- Phosphorus
- 90 µg/L
- Trend
- ↑ Improving
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Watch Beck Lake D’s letter
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Why Beck Lake D has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Beck Lake D, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus, but not water clarity and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Wyoming DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Beck Lake D is a 110-acre lake in Park County, Wyoming. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2015-09-21. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Beck Lake D
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 90 µg/L. TSI 69.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 90 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 69 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 110 acres |
No bathymetric survey has been published for Beck Lake D, so its depth is not documented here.
Fishing Beck Lake D
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -25 µg/L/yr | 3 |
Reservoir Info (USACE NID)
Beck Lake D is a man-made reservoir impounded by the Beck Lake (completed 1970), built primarily for irrigation on the South Fork of Shoshone; earth-type dam, 11 ft tall and 2,000 ft long.
- Surface area
- 110 ac
- Normal storage
- 638 ac-ft
- Max storage
- 968 ac-ft
- Drainage area
- 0.4 sq mi
- Hazard class
- Significant
- Owner
- CODY CANAL ASSN. (AKA CODY CANAL, INC.)
Source: USACE National Inventory of Dams, NID ID WY01554 · Operator website · Matched by proximity (0.24 km)
Graded lakes near Beck Lake D
Beck Lake D has no grade, but these lakes within a short drive do.
Nearby Lakes in Park County
Frequently asked questions about Beck Lake D
Where is Beck Lake D?
- Beck Lake D is a lake in Park County, Wyoming. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Beck Lake D?
- Beck Lake D in Park County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 90 µg/L. Surface area: 110 acres.
Is Beck Lake D safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Beck Lake D across LakeQuality
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Where this data comes from
7 measurements from 1 monitoring station, 2014–2015. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- State of Wyoming Department of Environmental Quality Watershed Program
WYDEQ_WATERSHED7 samples · 2014–2015
Analytical methods
- Total Phosphorus After Block Digestion
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.