Rockaway River at Boonton above reservoir
Flood levels
Official flood levels at this gauge: action stage begins at 3.5 ft; minor flooding begins at 4.5 ft; moderate flooding begins at 6.0 ft; major flooding begins at 7.0 ft.
| Action stage | 3.5 ft |
|---|---|
| Minor flooding | 4.5 ft |
| Moderate flooding | 6.0 ft |
| Major flooding | 7.0 ft |
Highest recorded crests
- 4.7 ft on Dec 18, 2023 (historic crest)
- 4.7 ft on Jan 10, 2024 (historic crest)
- 3.7 ft on May 1, 2014 (historic crest)
What the water does
National Weather Service impact statements for this gauge, in the Weather Service's own words.
| 2.0 ft | The Rockaway River leaves its banks and begins to flood the river parking lot at St. Clare's Hospital. |
|---|---|
| 3.5 ft | The Rockaway River leaves its banks and floods adjacent parks and trails in Denville including Gardner park. |
| 5.0 ft | Savage Road and other roads around Gardner Park in Denville flood. |
| 5.5 ft | The main parking lot at St. Clare's Hospital begins to flood. |
| 6.0 ft | Main Street in Rockaway is flooded. Jackson Avenue in Rockaway is flooded. Water backs up and comes through the sewer system. Main Street in Denville begins to flood. Gardner Park in Denville experiences significant flooding. Football and baseball fields are submerged in several feet of water. Portions of Boonton Township begin to flood. |
| 7.0 ft | Park's Lake area in Denville is flooded. Residents near Savage Road in Denville take on water. Residential areas in Dover Township adjacent to the river experience significant flooding. |
| 8.0 ft | Interstate Route 80 in Denville floods. Portions of Dover Township are under several feet of water. |
| 9.0 ft | Businesses on Main Street in Denville begin to flood. Sections of Boonton (municipality) begin to flood. |
| 10.0 ft | Main Street businesses in Denville experience several feet of water. |
Forecast office: NWS Mount Holly · River Forecast Center: Middle Atlantic River Forecast Center.
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Nearby stations and gauges
- Rockaway River at Boonton NWS gauge · 1.4 mi
- Rockaway River at Boonton below reservoir NWS gauge · 1.5 mi
- Whippany River at Pine Brook NWS gauge · 5.7 mi
- Passaic River at Pine Brook NWS gauge · 6.0 mi
- Beaver Dam Brook at Lincoln Park NWS gauge · 6.2 mi
- at Ryerson NWS gauge · 6.9 mi