Around here
Around Middle Brook
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
About this river
Middle Brook is a 2.4 mile river near Griggstown Canoe And Kayak Rental in New Jersey. Streamflow is measured at the USGS gauge Raritan River below Calco Dam at Bound Brook NJ (site 01403060). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1903 to 2026
Middle Brook typically runs highest in March, at a median 1,390 cfs, and lowest in September, at 262 cfs. The highest flow on record for any single day is 64,500 cfs, in 2021.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 930 | 555 to 1,710 |
| February | 1,060 | 655 to 1,790 |
| March | 1,390 | 900 to 2,280 |
| April | 1,135 | 686 to 1,925 |
| May | 720 | 461 to 1,390 |
| June | 411 | 238 to 721 |
| July | 315 | 179 to 619 |
| August | 294 | 179 to 608 |
| September | 262 | 171 to 504 |
| October | 272 | 175 to 562 |
| November | 454 | 236 to 1,060 |
| December | 855 | 474 to 1,740 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 87 years of record. Statistics published by the US Geological Survey for Raritan River below Calco Dam at Bound Brook NJ (site 01403060). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Made to print
Put Middle Brook on your wall
This river section as an art print, drawn over the real terrain with its miles, plus the trails, roads and peaks around it. Pick the colors and the size, and see the finished print before you buy. From $39, shipping included.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Middle Brook's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
See every free widget you can put on your site, including live conditions and a 7 day forecast.
