Summary of June 28-29, 2006 flooding in the New Jersey part of the Delaware River Basin

New Jersey Water Science Center

Summary of June 28-29, 2006 flooding in the New Jersey part of the Delaware River Basin

PROVISIONAL DATA SUBJECT TO REVISION

Rain fell over the Delaware River Basin every day from June 23 to June 28, 2006. Total rainfall ranged from 3 to 6.5 inches across the New Jersey part of the basin and 7 to 15 inches in northeastern Pennsylvania. The New York part of the basin received 6 to 14 inches during the same period. The heaviest rainfall occured on June 27th.
Most flooding in New Jersey occurred along the mainstem of the Delaware River. Peak stages at the Montague and Delaware Water Gap gages averaged 0.5 foot higher than the April 2005 peaks. At the Belvidere, Riegelsville, and Trenton gages, the peak stages were slightly lower than the April 2005 peaks. Peak stages at all locations were 3 to 5 feet lower than the August 1955 historical peak of record.
Gages along the Delaware River recorded peak flow consistent with 70-year to greater than 100-year recurrence interval floods. The 70-year recurrence interval flood has a 1.4 percent probability of occurrence in any given year and the 100-year recurrence interval flood has a 1.0 percent probability of occurrence in any given year.
Peak flows on tributaries to the Delaware River in New Jersey were less than the 5-year recurrence interval flood, which has a greater than 20 percent probability of occurrence in any given year.

Summary of provisional flood peaks at U.S. Geological Survey (USGS) gaging stations on selected streams in New Jersey during June 28-29, 2006.

[mi², square miles; ft³/s, cubic feet per second; ft³/s/mi², cubic feet per second per square mile; >, greater than; --, no data; EDT, eastern daylight time; NWS, National Weather Service; hrs, hours; Est, estimated]

Station number	Station name	Drainage area (mi²)	Peak discharge (ft³/s)	Peak discharge (ft³/s/mi²)	USGS Peak gage- height (ft)	NWS Peak gage- height (ft)	Time (hrs, EDT)	Date of peak discharge	Remarks	Recurrence interval (years)	Years of record
Delaware River Basin Gages
01438500	DELAWARE RIVER AT MONTAGUE, NJ	3,480	212,000	60.9	32.16	--	2215	06/28/2006	June 2006 peak	70	71
			206,000	59.2	31.69	--	1600	04/03/2005	April 2005 peak	55
			250,000	71.8	35.15	--	---	08/19/1955	Historic peak of record	>100
01440200	DELAWARE RIVER NEAR DELAWARE WATER GAP, NJ	3,850	225,000	58.4	33.87	--	Est 0400	06/29/2006	June 2006 peak	--	38
			215,000	55.8	33.25	--	2300	04/03/2005	April 2005 peak	--
			260,000	67.5	37.4	--	--	08/19/1955	Historic peak of record	--
01446500	DELAWARE RIVER AT BELVIDERE, NJ	4,540	225,000	49.6	27.16	--	1130	06/29/2006	June 2006 peak	>100	85
			226,000	49.8	27.22	--	0315	04/04/2005	April 2005 peak	>100
			273,000	60.1	30.21	--	-	08/19/1955	Historic peak of record	>100
01446995	DELAWARE RIVER AT US RT 22 AT PHILLIPSBURG, NJ	4,717	--	--	37.09	--	1215	06/29/2006	June 2006 peak	--	--
			--	--	37.2	--	--	04/04/2005	April 2005 peak	--
			--	--	43.7	--	--	08/19/1955	Historic peak of record	--
01457500	DELAWARE R AT RIEGELSVILLE, NJ	6,330	254,000	40.1	33.62	--	Est 1500	06/29/2006	June 2006 peak	>100	101
			262,000	41.4	34.07	--	0700	04/04/2005	April 2005 peak	>100
			340,000	53.7	38.85	--	--	08/19/1955	Historic peak of record	>100
01458500	DELAWARE RIVER AT FRENCHTOWN, NJ	6,420	--	--	23.4	23.4	--	06/29/2006	June 2006 peak	--	--
			--	--	23.6	23.6	--	04/04/2005	April 2005 peak	--
			--	--	27.79	27.79	--	08/20/1955	Historic peak of record	--
01461500	DELAWARE RIVER AT STOCKTON, NJ	6,556	--	--	79.35	25.35	--	06/29/2006	June 2006 peak	--	--
			--	--	80.35	26.35	--	04/04/2005	April 2005 peak	--
			--	--	84.4	30.4	--	08/20/1955	Historic peak of record	--
01462000	DELAWARE RIVER AT LAMBERTVILLE, NJ	6,680	--	--	68.08	19.0	--	06/29/2006	June 2006 peak	--	--
			--	--	68.6	19.6	--	04/04/2005	April 2005 peak	--
			--	--	73.27	24.27	--	08/20/1955	Historic peak of record	--
01462500	DELAWARE RIVER AT WASHINGTON CROSSING, NJ	6,735	--	--	48.54	22.5	--	06/29/2006	June 2006 peak	--	--
			--	--	49.1	23.1	--	04/04/2005	April 2005 peak	--
			--	--	53.77	27.77	--	08/20/1955	Historic peak of record	--
01463500	DELAWARE RIVER AT TRENTON, NJ	6,780	237,000	35.0	25.09	--	2045	06/29/2006	June 2006 peak	75	104
			242,000	35.7	25.33	--	1430	04/04/2005	April 2005 peak	80
			329,000	48.5	28.6	--	--	08/20/1955	Historic peak of record	>100

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