Red Mill Pond Dam

Red Mill Pond Dam is a gravity dam located in Sussex County, Delaware, built in 1925. It carries a High hazard potential classification and has a fair condition assessment.

About Red Mill Pond Dam

The primary purpose of Red Mill Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Deldot (state). It impounds the Martin Branch.

The dam stands 12 feet tall and stretches 630 feet across, creates a reservoir covering 201 acres, has a maximum storage capacity of 636 acre-feet, and collects water from a drainage area of 7 square miles. Completed in 1925, the structure is over a century old.

This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 05/09/2024.

Living Downstream

If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Delaware dam safety program can provide more specific information about emergency planning for this structure.

Search for dams near your address to see all dams in your area with hazard classifications and safety data.

High HazardFair ConditionEmergency Action Plan: Yes

Location

StateDelaware
CountySussex
Nearest CityNone
River/StreamMartin Branch
Coordinates38.76086, -75.20470

Physical Characteristics

Dam TypeGravity
NID Height12 ft
Dam Height12 ft
Dam Length630 ft
Year Completed1925 (101 years old)

Storage & Hydraulics

NID Storage636 acre-ft
Max Storage636 acre-ft
Normal Storage217 acre-ft
Surface Area201 acres
Drainage Area7 sq mi
Max Discharge636 cfs
Spillway TypeControlled

Ownership & Safety

PurposeRecreation
OwnerDELDOT
Owner TypeState
Hazard ClassificationHigh
Condition AssessmentFair
Last Inspection05/09/2024
Emergency Action PlanYes

Identifiers

NID IDDE00016
Federal IDDE00016
More InfoState Dam Safety Program

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