Lake Robertson
Rockbridge County, Virginia26 acresView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
- Oligotrophic
- #1 of 1 in the county
- Public access
Lake Robertson in Rockbridge County, Virginia has a water quality grade of A (Excellent). Water clarity: 13.9 ft visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 1.9 µg/L. Surface area: 26 acres.
- Clarity
- 13.9 ft
- Area
- 26 acres
- Type
- Oligotrophic
- Phosphorus
- 10 µg/L
- Chlorophyll-a
- 1.9 µg/L
- Trend
- ↑ Improving
- Public access
- Yes
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Watch Lake Robertson’s letter
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Lake Robertson is a 26-acre cold, clear oligotrophic lake in Rockbridge County, Virginia. Water quality is graded A based on 2 sampling years through 2026. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Virginia DEQ, last sampled 2026-06-15. Grade methodology: LakeQuality methodology.
What Lake Robertson is good for
From access and monitoring records, not editorial picks.
- Clear water13.9 ft of visibility
- Boat launch1 documented ramp
Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Good clarity, visible to about 13.9 ft. Phosphorus 10 µg/L. Chlorophyll-a 1.9 µg/L. TSI 38. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13.9 ft | Not graded |
| Phosphorus | 10 µg/L | Good |
| Chlorophyll-a (Algae) | 1.9 µg/L | Good |
| Trophic State Index (TSI) | 38 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 26 acres |
| Public Access | Yes |
No bathymetric survey has been published for Lake Robertson, so its depth is not documented here.
Recreation & Access
- Lake RobertsonPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Robertson
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.019 m/yr | 5 |
| Phosphorus | ↑ Improving | -0.61 µg/L/yr | 4 |
| Chlorophyll-a | ↑ Improving | -0.14 µg/L/yr | 4 |
Reservoir Info (USACE NID)
Lake Robertson is a man-made reservoir impounded by the Robertson Dam, built primarily for recreation on the Unnamed tributary to Colliers Creek - VAHU6 JU84 Colliers Creek; earth-type dam, 52 ft tall and 400 ft long.
- Surface area
- 26 ac
- Normal storage
- 440 ac-ft
- Max storage
- 678 ac-ft
- Drainage area
- 1 sq mi
- Hazard class
- High
- Owner
- Virginia Department of Wildlife Resources
Source: USACE National Inventory of Dams, NID ID VA163002 · Operator website
County Ranking
Ranked #1 of 1 lakes in Rockbridge County
Nearby Lakes in Rockbridge County
Frequently asked questions about Lake Robertson
Where is Lake Robertson?
- Lake Robertson is a lake in Rockbridge County, Virginia. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Robertson?
- Lake Robertson in Rockbridge County, Virginia has a water quality grade of A (Excellent). Water clarity: 13.9 ft visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 1.9 µg/L. Surface area: 26 acres.
Is Lake Robertson safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Lake Robertson?
- Lake Robertson has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Robertson. Public access is listed as yes.
Explore Lake Robertson across LakeQuality
20.1 mi away · 200 ft
10.3 mi away · recorded at 72°F
Species activity outlook by water temperature and season
Where to stay at Virginia's top lakes, each with its grade
Low nutrients, clear water. The letter is not a swimming clearance.
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Where this data comes from
113 measurements from 1 monitoring station, 2013–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY
21VASWCB113 samples · 2013–2026
Analytical methods
- Tyler, John. 1968. The secchi disk, Limnology and Oceanograpy, 13(1):1-6.
- Total Phosphorus After Block Digestion
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- 446.0 ~ EPA; Chlorophylls and Pheopigments in Phytoplankton by Spectrophotometry
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
Named boat-access points from the USGS National Boat Ramps inventory