Floods of August and September 1971 in Maryland and Delaware

Open-File Report 74-1015



Intense rainfall, resulting mostly from severe thunderstorms in August and September 1971 caused considerable flooding throughout much of Maryland and Delaware. Precipitation totals of 5.47 inches in 3 hours and 12.6 inches in 12 hours were reported for the most severe storm of the period which occurred on Aug. 1-2, and was centered in southeast Baltimore County, Md.

Total storm damage for the 2 months was estimated to exceed 10 million dollars. Fourteen lives were lost and extensive damage was done to homes, businesses, crops, bridges, culverts, and roadways.

Flood discharge data are presented for 75 gaging stations and for 6 miscellaneous sites. New peaks of record occurred at 32 of the gaging stations. The maximum unit peak discharge rate recorded was 2,400 cubic fee t per second per square mile.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Floods of August and September 1971 in Maryland and Delaware
Series title Open-File Report
Series number 74-1015
DOI 10.3133/ofr741015
Year Published 1974
Language English
Publisher U.S. Geological Survey
Publisher location Parkville, MD
Description iii, 35 p.
Time Range Start 1971-08-01
Time Range End 1971-09-30
Country United States
State Delaware, Maryland
Online Only (Y/N) N
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details