Royce Brook at Hamilton Road Near Manville NJ

USGS Site No: 01402630 • Royce Brook • Somerset County, NJ

Royce Brook at Hamilton Road Near Manville NJ on the Royce Brook is currently at 2 cfs (Normal — 31th percentile for this date) . Gage height: 1.21 ft.

Reading from

2
CFS Discharge
1.21
Gage Height (ft)
Normal
Flow Condition
N/A
Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for June 11 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile Label CFS Threshold Today's Flow
10th Very Low threshold 1
25th Low threshold 2
50th (Median) Normal (median) 4 Today: 2 cfs
75th High threshold 11
95th Very High threshold 0

30-Day Hydrograph

Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.

73 37 0 cfs Apr 6 May 28
10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date Discharge (CFS) Gage Ht (ft)
May 28, 2026 3 —
May 27, 2026 5 —
May 26, 2026 7 —
May 25, 2026 19 —
May 24, 2026 68 —
May 23, 2026 5 —
May 22, 2026 1 —
May 21, 2026 4 —
May 20, 2026 5 —
May 19, 2026 1 —
May 18, 2026 2 —
May 17, 2026 2 —
May 16, 2026 1 —
May 15, 2026 2 —
Apr 21, 2026 1 —
Apr 20, 2026 1 —
Apr 19, 2026 2 —
Apr 18, 2026 2 —
Apr 17, 2026 2 —
Apr 16, 2026 2 —
Apr 15, 2026 2 —
Apr 14, 2026 3 —
Apr 13, 2026 3 —
Apr 12, 2026 3 —
Apr 11, 2026 3 —
Apr 10, 2026 3 —
Apr 9, 2026 3 —
Apr 8, 2026 3 —
Apr 7, 2026 4 —
Apr 6, 2026 6 —

Station Information

USGS Site No
01402630
State
NJ
County
Somerset County
Coordinates
40.5061, -74.6231
Drainage Area
8 mi²
Datum (ft)
42.2
HUC Code
020301050311
View on USGS NWIS →

Recent Extremes

Max discharge
210 cfs
May 31, 2025
Min discharge
0 cfs
Dec 17, 2025

Computed from the local daily-values archive.

Nearby Gauges

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