Linn Valley Lake
Linn County, Kansas107 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.
- 31 ft max depth
- Limited data
Linn Valley Lake in Linn County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.2 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 4.2 µg/L. Surface area: 106.5 acres.
- Clarity
- 8.2 ft
- Max depth
- ~31 ft est.
- Area
- 107 acres
- Phosphorus
- 20 µg/L
- Chlorophyll-a
- 4.2 µg/L
Stays via Stay22
Stays near Linn Valley Lake
Compare lakeside cabins, hotels, and vacation rentals near Linn Valley Lake in Linn County, Kansas — 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 Linn Valley Lake
Prices for Sep 11–13, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Kansas’s top lakes →
Watch Linn Valley Lake’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Why Linn Valley Lake 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 Linn Valley Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, phosphorus 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 KDHE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
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. 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 Linn Valley Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 8.2 ft. Phosphorus 20 µg/L. Chlorophyll-a 4.2 µg/L. TSI 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.2 ft | Not graded |
| Phosphorus | 20 µg/L | Not graded |
| Chlorophyll-a (Algae) | 4.2 µg/L | Not graded |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~31 ft est. |
| Average Depth | ~14 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
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.
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)
Graded lakes near Linn Valley Lake
Linn Valley Lake has no grade, but these lakes within a short drive do.
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. 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 Linn Valley Lake?
- Linn Valley Lake in Linn County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. 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?
- The letter is 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.
Explore Linn Valley Lake across LakeQuality
More Kansas Lake Rankings
Other Lakes in Kansas
Mesotrophic Lakes in Kansas
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)
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.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)