Linn Valley Lake
Linn County, Kansas107 acresView mapDirections
KDHE publishes the water-quality measurements for Linn Valley Lake. Here is what has been measured.
- 31 ft max depth
- Limited data
Linn Valley Lake in Linn County, Kansas has water-quality measurements published by KDHE, shown here as reported. Water clarity: 8.2 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 4.2 µg/L. Surface area: 106.5 acres.
Linn Valley Lake is a 107-acre lake in Linn County, Kansas with an estimated average depth of about 31 feet.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2013-07-01. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Linn Valley Lake is safe to swim in today is a call for the Kansas Department of Health and Environment and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Linn Valley Lake
These are the measurements KDHE publishes for Linn Valley Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 8.2 ft. Phosphorus 20 µg/L. Chlorophyll-a 4.2 µg/L. TSI 46.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 8.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 20µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 4.2µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 46 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Linn Valley Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~31 ft est.
Surface area
107 acres
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Kansas has not published bathymetry for Linn Valley Lake.
Lake Size & Watershed
Watershed (drainage) area
1 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.5 mi
HydroLAKES / HydroSHEDS
Elevation
883 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.
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Fishing Linn Valley Lake
Reservoir Info (USACE NID)
Linn Valley Lake is a man-made reservoir impounded by the Dam No 4 (completed 1985), built primarily for recreation on the Middle Creek, 68 ft tall and 1,420 ft long.
- Surface area
- 106.5 ac
- Normal storage
- 2,600.9 ac-ft
- Max storage
- 4,159.4 ac-ft
- Drainage area
- 2.08 sq mi
- Hazard class
- High
- Owner
- LINN VALLEY LAKES
Source: USACE National Inventory of Dams, NID ID KS07341 · Operator website · Matched by proximity (0.13 km)
Nearby Lakes in Linn County
Frequently asked questions about Linn Valley Lake
Where is Linn Valley Lake?
- Linn Valley Lake is a lake in Linn County, Kansas. Its water-quality measurements are published by KDHE and shown on this page as reported.
What is the water quality of Linn Valley Lake?
- Linn Valley Lake in Linn County, Kansas has water-quality measurements published by KDHE, shown here as reported. Water clarity: 8.2 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 4.2 µg/L. Surface area: 106.5 acres.
Is Linn Valley Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Linn Valley Lake?
- No published bathymetric survey covers Linn Valley Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 31 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 106.5 acres.
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Where this data comes from
5 measurements from 1 monitoring station, 2013. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kansas Department Of Health And Environment
21KAN001_WQX5 samples · 2013
Analytical methods
- Depth, Secchi disk depth
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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
Lake size & watershed from HydroLAKES (HydroSHEDS)