Tunnel Reservoir
Apache County, Arizona164 acresView mapDirections
No nutrient or algae sampling on record from ADEQ for this lake.
- Public access
- Limited data
Tunnel Reservoir in Apache County, Arizona has water-quality measurements published by ADEQ, shown here as reported. Surface area: 164 acres.
Tunnel Reservoir is a 164-acre lake in Apache County, Arizona. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2022-04-17. Methodology: how these readings are compared.
What Tunnel Reservoir is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Tunnel Reservoir is safe to swim in today is a call for the Arizona Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Tunnel Reservoir
These are the measurements ADEQ publishes for Tunnel Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data.
Ask about Tunnel Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
164 acres
Public access
Yes
Listed by ADEQ
No bathymetric survey has been published for Tunnel Reservoir, so its depth is not documented here.
Recreation & Access
- Tunnel ReservoirPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Tunnel Reservoir
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Fishing Tunnel Reservoir
Reservoir Info (USACE NID)
Tunnel Reservoir is a man-made reservoir impounded by the River Reservoir #3 (completed 1896), built primarily for irrigation on the Little Colorado River; rockfill-type dam, 58 ft tall and 1,212 ft long.
- Surface area
- 164 ac
- Normal storage
- 2,146 ac-ft
- Max storage
- 3,195 ac-ft
- Drainage area
- 34.4 sq mi
- Hazard class
- High
- Owner
- PIONEER IRRIGATION COMPANY INC.
Source: USACE National Inventory of Dams, NID ID AZ00007 · Operator website · Matched by proximity (0.79 km)
Nearby Lakes in Apache County
Frequently asked questions about Tunnel Reservoir
Where is Tunnel Reservoir?
- Tunnel Reservoir is a lake in Apache County, Arizona. Its water-quality measurements are published by ADEQ and shown on this page as reported.
What is the water quality of Tunnel Reservoir?
- Tunnel Reservoir in Apache County, Arizona has water-quality measurements published by ADEQ, shown here as reported. Surface area: 164 acres.
Is Tunnel Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Tunnel Reservoir?
- Tunnel Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Tunnel Reservoir. Public access is listed as yes.
Can I fish at Tunnel Reservoir?
- Tunnel Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Arizona's fish and wildlife agency, so check its current regulations before you go.
Explore Tunnel Reservoir across LakeQuality
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Where this data comes from
2 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Great Lakes Environmental Center
GLEC2 samples · 2022
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
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
Named boat-access points from the USGS National Boat Ramps inventory