See all 2 routes on Rock River
Wisconsin | Southern Wisconsin
Rock RiverJanesville Centerway Dam portage to Afton Road Boat Launch
Short, fast-moving Rock River reach from the public Centerway Dam portage launch through Janesville's riverfront to the Afton Road Boat Launch.
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Route location
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Route overview
Trip details
Access rules, camping and seasonal notes.
Permits, camping and season
Access and shuttle
Put in below Centerway Dam via the public portage path and take out at Afton Road Boat Launch. This is a short route with unusually strong current and urban/industrial hazards; the direct Afton gauge is used conservatively.
Access map
Put-in
Centerway Dam public portage launchThe Centerway Dam portage is the required put-in; never run the dam or launch near the powerhouse outlets.
Take-out
Afton Road Boat LaunchRock County's access inventory describes Afton Road as a small-watercraft launch with parking but no camping or restroom service.
Road shuttle
Stage the Afton Road Boat Launch first, then drive to the Centerway Dam portage. Keep the vehicle shuttle short but verify current Janesville access, parking, and construction notices before launch.
Additional access notes
- The route passes public riverfront and industrial shoreline; do not land on restricted property or improvise a take-out at bridge or plant structures.
- Confirm the Afton launch and Centerway portage remain open before leaving; flooding, construction, or events can change access.
More route and safety guidance
- Wisconsin River Trips reports fast current, narrow gaps, strainers, and dangerous pillow currents at bridge structures on this reach.
- Rock County's gauge-linked slow-no-wake rule applies downstream from Indianford Dam above 6.5 feet at USGS 05430500; treat that as a high-water stop signal for this short route.
- The route passes the Evonik chemical plant; remain in the channel, obey posted warnings, and do not land on restricted industrial property.
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Conditions
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Station details and river cameras
Station observations
USGS measurements
Measurement notes and coverage
These are observations at the station. Water depth and current can differ along your trip.
River camera · USGS
View at the gauge
Rock River at Afton, WI. This view may be outside your paddling reach. Images are periodic and do not establish safe conditions.
Photos and recent reports
Look for recent access, obstruction and hazard observations. Context photos may show a different part of the river.
Paddler reports
Recent notes from paddlers
A few quick notes from people who were on this route recently.
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Sources and methodology
Review source dates and published guidance below. We have not inspected this trip in person.
Why this scoreData reliability: checking
This rating reflects whether the gauge measures this part of the river, whether published water-level guidance is available, and how recently the data was updated.
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Data behind the scoreWater levels, published guidance and update times
These readings and published water-level limits help explain today’s score.
| Gauge site | Rock River at Afton, WI |
| Discharge | Checking |
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| 24h trend | Checking |
| 24h change | Checking |
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| Rain last 24h | Checking |
| Rain last 72h | Checking |
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| Preferred range | Needs paddler reports |
| Known low-water floor | 2,350 cfs |
| High threshold | Water-level guidance unavailable |
| Evidence strength behind the range | Local route guidance |
| Gauge observed | Checking |
| Paddle Today updated | Checking |
| Main source behind this score | Wisconsin River Trips Janesville Rock River gauge observation |
| Gauge source | Checking |
| Weather source | Checking |
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NotesPublished evidence and verification notes
These notes cover the access details, route quirks, and source caveats most likely to matter once you get there.
- Exact routeCenterway Dam to Afton, 2.9 mi
Wisconsin River Trips documents the exact Janesville Centerway Dam-to-Afton Boat Launch trip, public portage launch, route length, and finish.
- Endpoint coordinates42.6850,-89.0256 to 42.6675,-89.0461
Rock County's official Rock River Water Trail inventory identifies Centerway Dam and Afton Road Boat Launch with DMS coordinates and access notes.
- Minimum-only gauge reference2,350 cfs / 5.04 ft observation
Wisconsin River Trips records the trip at 2,350 cfs / 5.04 ft and describes the current as fast; PaddleToday uses this as a conservative minimum-only reference, not an ideal range.
- Gauge-linked high-water policySlow-no-wake above 6.5 ft
Rock County applies a gauge-linked slow-no-wake rule downstream from Indianford Dam when USGS 05430500 exceeds 6.5 ft; this is used as a no-launch caution, not a paddling-quality threshold.
- Direct live gaugeUSGS 05430500 Rock River at Afton
USGS operates the direct Afton station and exposes continuous stage/discharge graphs.
Verify it yourselfCheck the source links
Use these links to double-check the gauge, route details, and access notes before you head out.
Other routes nearby
More on Rock River
All 2Nearby routes within 75 miles
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