Jesse Enlargement Reservoir Report

Last Updated: December 13, 2025

Jesse Enlargement, also known as Carlton Nursery Dam, is a private water resource located in Oregon, specifically in Washington County.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1998, this earth dam stands at a height of 32 feet and spans 220 feet in length, primarily serving the purpose of irrigation. With a storage capacity of 177 acre-feet, it plays a crucial role in supporting agricultural activities in the region.

Managed by the Oregon Water Resources Department, Jesse Enlargement has a significant hazard potential and undergoes inspections every three years. The dam features a slide outlet gate for controlled water release. Despite having a condition assessment of "Not Rated," the structure is regulated and enforced by state authorities, ensuring its safety and integrity for long-term water management.

Located within the Portland District, Jesse Enlargement is a key player in the water infrastructure of the area, offering vital support for irrigation needs. Its presence highlights the importance of sustainable water resource management in the face of changing climate conditions, making it a significant asset for water resource and climate enthusiasts alike.

Year Completed

1998

Dam Length

220

Dam Height

32

Primary Dam Type

Earth

Nid Storage

177

Outlet Gates

Slide (sluice gate)

Hazard Potential

Significant

Nid Height

32
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.