Rossmoor No. 1

High HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

CountyOrange
Nearest CityLaguna Woods/Hills
River/StreamTr San Diego Cr
Coordinates33.61920, -117.73040

Physical Characteristics

Dam TypeEarth
NID Height36 ft
Dam Height36 ft
Dam Length305 ft
Year Completed1964 (62 years old)

Storage & Hydraulics

NID Storage43 acre-ft
Max Storage43 acre-ft
Surface Area3 acres
Drainage Area0 sq mi

Ownership & Safety

PurposeOther
OwnerEl Toro Water District
Owner TypePublic Utility
Hazard ClassificationHigh
Condition AssessmentSatisfactory
Last Inspection04/23/2025
Emergency Action PlanYes

Identifiers

NID IDCA00753
Federal IDCA00753
More InfoState Dam Safety Program

Nearby Dams

Veeh 0.5 mi High El Toro Reservoir 3.6 mi High Sand Canyon 4.2 mi High Lake Mission Viejo 4.7 mi High Galivan Retarding Basin 5.0 mi Low Sulphur Creek 5.0 mi High Marshburn Retarding Basin 5.2 mi High Agua Chinon 5.2 mi High Trabuco Retarding Basin 5.5 mi High Round Canyon Retarding Basin 5.8 mi Low