The peak gage height was recorded at 6.27 ft, 0.81 ft above the previous record of 5.46 ft set on August 28, 1971.
A discharge measurement was made on the receding limb of the hydrograph. Additional computations and analyses are needed to more accurately compute the peak discharge. As a result, the peak discharge was estimated to be 5,000 ft 3/s on the basis of the shape of the hydrograph below the value of 3,000 ft3/s. This flood peak exceeded the upper end of the current stage/discharge relation. Flood frequency statistics at this site are based on peak flow data from 1964 through 1990. The flood peak on the Cooper River at Haddonfield significantly exceeded the 100-year recurrence interval flood. The peak stage recorded was 12.34 ft, 4.36 ft above the previous record of 7.98 ft set on August 28, 1971. Further analysis of the current stage/discharge relation and the new streamflow measurements is needed to more accurately compute the peak discharge. A total of four discharge measurements were made during the highest stages of the flood. As a result of the measurement and the peak stage recorded, the peak flow was estimated to be 4,200 ft3/s. A discharge measurement made just after the stream peaked measured 4,100 ft3/s (cubic feet per second). The flood peak exceeded the upper end of the current stage/discharge relation. Flood frequency statistics at this site are based on peak flow data from 1961 through 1990. The flood peak on the South Branch Rancocas Creek at Vincentown significantly exceeded the 100-year recurrence interval flood. The Rancocas Creek, Pennsauken Creek, and Cooper River are tributaries to the Delaware River. The stream gages are located on South Branch Rancocas Creek, McDonalds Branch, Greenwood Branch, and North Branch Rancocas Creek in the Rancocas Creek basin and at gaging stations on the Cooper River and South Branch Pennsauken Creek. View from bridge to vehicle along Lumberton-Vincentown Road(Public domain.)įlood peaks were the highest ever recorded at six USGS stream gaging stations in Burlington and Camden Counties N.J. During the 4-hour period from 1700 to 2100 hours, 8.77 inches was recorded. The most intense hourly rainfall was observed during the 1-hour period between 19 hours, when 5.19 inches was recorded. The gage recorded 9.34 inches during that 5-hour period. The most intense period of rainfall observed at the USGS rain gage was from 1700 to 2200 hours on July 12. Both rain gages are located in the Rancocas Creek basin a tributary to the Delaware River. Geological Survey (USGS) gaging station on Greenwood Branch at New Lisbon ( 01466900) in Pemberton Township, N.J., recorded 11.3 inches. The rain gage at Tabernacle recorded 13.2 inches, and the rain gage at the U.S. More than 11 inches of rain was recorded by rain gages in Pemberton and Tabernacle Townships in Burlington County. Doppler radar estimates of total rainfall for the 24-hour period ending 0700 hours EDT on July 13 were from 8-12 inches over central Burlington, western Ocean, and eastern Camden Counties. (Anthony Gigi, National Weather Service, oral commun., July 14, 2004).
The system received upper-level support from the northwest. The heavy rainfall was caused by a warm front approaching from the southwest that stalled over the area as a low pressure system developed along the front.
Unusually large amounts of rain deluged parts of Burlington, Camden and Ocean Counties in southern New Jersey from the morning of July 12 through the early morning hours of July 13, 2004. Roof of utility shed on property downstream from the bridge on Lumberton-Vincentown Road.(Public domain.)
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