Upper Delta (north Offset Dam & West Offset Dam)

High HazardFair ConditionEmergency Action Plan: Yes

Location

StateWyoming
CountySweetwater
Nearest CityGREEN RIVER
River/StreamGREEN RIVER
Coordinates41.70760, -109.66940

Physical Characteristics

Dam TypeEarth
NID Height40 ft
Dam Height40 ft
Dam Length8,900 ft
Year Completed2013 (13 years old)

Storage & Hydraulics

NID Storage9,992 acre-ft
Max Storage9,992 acre-ft
Normal Storage9,992 acre-ft
Surface Area652 acres

Ownership & Safety

PurposeTailings
OwnerSisecam
Owner TypePrivate
Hazard ClassificationHigh
Condition AssessmentFair
Last Inspection06/05/2025
Emergency Action PlanYes

Identifiers

NID IDWY02532
Federal IDWY02532
More InfoState Dam Safety Program

Nearby Dams

Tailings Pond No. 1 1.0 mi Low No. 3 Tailings 1.4 mi Low Pond 4 (dam 2) 1.6 mi Significant Pond 4 (dam 2a) 1.7 mi Significant Pond 4 (dam 2b) 1.8 mi Significant Pond 2 (dam A) 2.3 mi Low Sewage Lagoon 7.9 mi Low No. 5a 9.2 mi Low Pond No. 3 9.4 mi Low Fly Ash Disposal Cell B 9.4 mi Low