Lake Shayne-Terre du Lac Lakes
Washington County, Missouri51 acresView mapDirections
Missouri DNR publishes the water-quality measurements for Lake Shayne-Terre du Lac Lakes. Here is what has been measured.
- Oligotrophic
- 46 ft max depth
Lake Shayne-Terre du Lac Lakes in Washington County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 11.1 ft visibility. Phosphorus: 5.2 µg/L. Chlorophyll-a (algae): 1.2 µg/L. Surface area: 51 acres.
Lake Shayne-Terre du Lac Lakes is a 51-acre cold, clear oligotrophic lake in Washington County, Missouri with an estimated average depth of about 46 feet. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-08-13. Methodology: how these readings are compared.
Lake Shayne-Terre du Lac Lakes covers about 51 acres in Washington County. If you are planning to stay, you can search lake houses and cabins around Lake Shayne-Terre du Lac Lakes on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
What Lake Shayne-Terre du Lac Lakes is good for
From access and monitoring records, not editorial picks.
- Clear water11.1 ft of visibility
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lake Shayne-Terre du Lac Lakes is safe to swim in today is a call for the Missouri Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Shayne-Terre du Lac Lakes
These are the measurements Missouri DNR publishes for Lake Shayne-Terre du Lac Lakes, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 11.1 ft. Phosphorus 5.2 µg/L. Chlorophyll-a 1.2 µg/L. TSI 34.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 11.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 5.2µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 1.2µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 34 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Lake Shayne-Terre du Lac Lakes
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Lake Shayne-Terre du Lac Lakes typically sits around 80°F at the surface in September. Summer average is about 82°F. Usually warmest in Jul (about 84°F) and coldest in Apr (about 60°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (60°F) to its warmest (84°F).
Typical surface water temperature by month, from 91 field readings (2010–2024) via the EPA Water Quality Portal. See the full Lake Shayne-Terre du Lac Lakes water temperature breakdown →
Lake Details
Max depth
~46 ft est.
Surface area
51 acres
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Missouri has not published bathymetry for Lake Shayne-Terre du Lac Lakes.
Lake Size & Watershed
Watershed (drainage) area
1 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.3 mi
HydroLAKES / HydroSHEDS
Elevation
909 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Stays via Stay22
Stays near Lake Shayne-Terre du Lac Lakes
Compare lakeside cabins, hotels, and vacation rentals near Lake Shayne-Terre du Lac Lakes in Washington County, Missouri — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Lake Shayne-Terre du Lac Lakes
Prices for Oct 23–25, 4 adults. Change dates on the map below.
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Fishing Lake Shayne-Terre du Lac Lakes
Water Quality Trend: Improving
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving4 years
Phosphorus
Worsening+0.41 µg/L/yr6 years
Chlorophyll-a
Improving-0.26 µg/L/yr5 years
Reservoir Info (USACE NID)
Lake Shayne-Terre du Lac Lakes is a man-made reservoir impounded by the Lac Shayne Dam (completed 1979), built primarily for recreation on the POND CREEK; earth-type dam, 72 ft tall and 1,600 ft long.
- Surface area
- 51 ac
- Normal storage
- 2,475 ac-ft
- Max storage
- 2,475 ac-ft
- Drainage area
- 0.7 sq mi
- Hazard class
- High
- Owner
- TERRE DU LAC POA
Source: USACE National Inventory of Dams, NID ID MO31835 · Operator website · Matched by proximity (0.07 km)
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Lake Shayne-Terre du Lac Lakes under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Terre Dulac North Three Cell LagoonBonne Terre · 2.1 mi away · NPDES MO0035700Recent violation
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Washington County
Frequently asked questions about Lake Shayne-Terre du Lac Lakes
Where is Lake Shayne-Terre du Lac Lakes?
- Lake Shayne-Terre du Lac Lakes is a lake in Washington County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Lake Shayne-Terre du Lac Lakes?
- Lake Shayne-Terre du Lac Lakes in Washington County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 11.1 ft visibility. Phosphorus: 5.2 µg/L. Chlorophyll-a (algae): 1.2 µg/L. Surface area: 51 acres.
Is Lake Shayne-Terre du Lac Lakes safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Lake Shayne-Terre du Lac Lakes?
- Lake Shayne-Terre du Lac Lakes typically sits around 80°F at the surface in September, from 91 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
How deep is Lake Shayne-Terre du Lac Lakes?
- No published bathymetric survey covers Lake Shayne-Terre du Lac Lakes, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 46 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 51 acres.
Explore Lake Shayne-Terre du Lac Lakes across LakeQuality
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Where this data comes from
149 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC149 samples · 2020–2024
Analytical methods
- Depth, Secchi disk in meters
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)