Alta Loma Basin #1

High HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

CountySan Bernardino
Nearest CityRancho Cucamunga
River/StreamAlta Loma Channel
Coordinates34.14370, -117.59090

Physical Characteristics

Dam TypeEarth
NID Height30 ft
Dam Height30 ft
Dam Length2,600 ft
Year Completed1964 (62 years old)

Storage & Hydraulics

NID Storage70 acre-ft
Max Storage70 acre-ft
Surface Area23 acres
Drainage Area1 sq mi

Ownership & Safety

PurposeFlood Risk Reduction
OwnerCounty of San Bernardino Department of Public Works
Owner TypeLocal Government
Hazard ClassificationHigh
Condition AssessmentSatisfactory
Last Inspection03/10/2025
Emergency Action PlanYes

Identifiers

NID IDCA00319
Federal IDCA00319
More InfoState Dam Safety Program

Nearby Dams

Alta Loma Basin #2 0.4 mi High Demens Creek Debris Basin 1.2 mi High Deer Canyon Debris Basin 2.4 mi High Cucamonga Creek Debris Basin 2.8 mi High Day Creek Debris Basin 3.5 mi High Etiwanda Debris Basin 4.6 mi High San Antonio Dam 5.0 mi High San Sevaine Basin #5 5.4 mi High Hickory Basin 5.6 mi Significant Upland Basin 6.9 mi High