Hallowell Swm Dam

Low HazardSatisfactory ConditionEmergency Action Plan: No

Location

StateMaryland
CountyMontgomery
River/StreamJames Creek
Coordinates39.15600, -77.04660

Physical Characteristics

Dam TypeEarth
NID Height29 ft
Dam Height29 ft
Dam Length600 ft
Year Completed1990 (36 years old)

Storage & Hydraulics

NID Storage357 acre-ft
Max Storage357 acre-ft
Normal Storage84 acre-ft
Surface Area14 acres
Drainage Area1 sq mi
Max Discharge3,800 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeFlood Risk Reduction
OwnerMontgomery County DEP
Owner TypeLocal Government
Hazard ClassificationLow
Condition AssessmentSatisfactory
Last Inspection04/20/2022
Emergency Action PlanNo

Identifiers

NID IDMD00317
Federal IDMD00317
More InfoState Dam Safety Program

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