Rinquelin Trail Comm. Lake
Maries County, Missouri27 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.
- Impaired · Mercury
- 26 ft max depth
- Public access
- Limited data
Rinquelin Trail Comm. Lake in Maries County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 4.5 ft visibility. Phosphorus: 39 µg/L. Chlorophyll-a (algae): 12.8 µg/L. Surface area: 27 acres.
- Clarity
- 4.5 ft
- Max depth
- ~26 ft est.
- Area
- 27 acres
- Phosphorus
- 39 µg/L
- Chlorophyll-a
- 12.8 µg/L
- Public access
- Yes
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Watch Rinquelin Trail Comm. Lake’s letter
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Why Rinquelin Trail Comm. 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 Rinquelin Trail Comm. 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 Missouri DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Rinquelin Trail Comm. Lake is a 27-acre lake in Maries County, Missouri with an estimated average depth of about 26 feet. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2022-07-29. Grade methodology: LakeQuality methodology.
What Rinquelin Trail Comm. Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Rinquelin Trail Comm. Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Water quality measurements for Rinquelin Trail Comm. Lake
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 4.5 ft. Phosphorus 39 µg/L. Chlorophyll-a 12.8 µg/L. TSI 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.5 ft | Not graded |
| Phosphorus | 39 µg/L | Not graded |
| Chlorophyll-a (Algae) | 12.8 µg/L | Not graded |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~26 ft est. |
| Average Depth | ~14 ft est. |
| Surface Area | 27 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Missouri has not published bathymetry for Rinquelin Trail Comm. 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.
Recreation & Access
- Rinquelin Trail Lake Conservation AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Rinquelin Trail Comm. Lake
Reservoir Info (USACE NID)
Rinquelin Trail Comm. Lake is a man-made reservoir impounded by the Rinquelin Trail Dam (completed 1972), built primarily for recreation on the LITTLE MARIES; earth-type dam, 35 ft tall and 800 ft long.
- Surface area
- 27 ac
- Normal storage
- 372 ac-ft
- Max storage
- 372 ac-ft
- Drainage area
- 0.91 sq mi
- Hazard class
- Significant
- Owner
- MO DEPT OF CONSERVATION
Source: USACE National Inventory of Dams, NID ID MO30114 · Operator website · Matched by proximity (0.13 km)
EPA Impairment Status
Rinquelin Trail Comm. Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MO_7204.00 · Official waterbody report · Matched by proximity (0.23 km)
Graded lakes near Rinquelin Trail Comm. Lake
Rinquelin Trail Comm. Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Maries County
Frequently asked questions about Rinquelin Trail Comm. Lake
Where is Rinquelin Trail Comm. Lake?
- Rinquelin Trail Comm. Lake is a lake in Maries County, Missouri. 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 Rinquelin Trail Comm. Lake?
- Rinquelin Trail Comm. Lake in Maries County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 4.5 ft visibility. Phosphorus: 39 µg/L. Chlorophyll-a (algae): 12.8 µg/L. Surface area: 27 acres.
Is Rinquelin Trail Comm. Lake safe to swim in?
- The letter is not a swimming clearance. Rinquelin Trail Comm. Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Rinquelin Trail Comm. Lake?
- No published bathymetric survey covers Rinquelin Trail Comm. Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 26 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 27 acres.
Are there boat ramps on Rinquelin Trail Comm. Lake?
- Rinquelin Trail Comm. Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Rinquelin Trail Lake Conservation Area. Public access is listed as yes.
Explore Rinquelin Trail Comm. Lake across LakeQuality
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Where this data comes from
3 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Missouri Dept. of Natural Resources
MDNR3 samples · 2022
Analytical methods
- Depth, Secchi disk in meters
- Nitrogen and Phosphorus, Total, Whole-water, Alkaline Persulfate Digest
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory