Rawlins Wastewater Treatment Plant (St2) Reservoir Report

Last Updated: December 15, 2025

The Rawlins Wastewater Treatment Plant (St2) in Wyoming is a vital facility that plays a crucial role in ensuring the proper treatment of wastewater from the surrounding area.


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Summary

Owned by the local government, this plant is regulated by the state and undergoes regular inspections to ensure compliance with environmental standards. Designed by Mickey M. Yamashiro, the plant was completed in 1978 and serves as a key infrastructure for the community.

Situated near Sugar Creek, a tributary of the North Platte River, the Rawlins Wastewater Treatment Plant has a significant hazard potential and is classified as a high-risk facility. Despite this, the plant's condition is assessed as fair, with a last inspection date in July 2017. With a storage capacity of 148 acre-feet and a surface area of 140 acres, the plant serves as a critical component in managing the region's wastewater and ensuring environmental protection.

Overall, the Rawlins Wastewater Treatment Plant is an essential piece of infrastructure in Carbon County, Wyoming. With its earth dam structure and stone core, the plant stands as a testament to the importance of proper wastewater treatment in safeguarding water resources and mitigating climate impacts. As a key player in the state's regulatory framework, this plant is at the forefront of environmental stewardship and serves as a model for sustainable water management practices.

Year Completed

1978

Dam Length

5875

Dam Height

8

River Or Stream

SUGAR CREEK, TRIB NORTH PLATTE

Primary Dam Type

Earth

Surface Area

140

Hydraulic Height

14

Drainage Area

0.2

Nid Storage

148

Structural Height

17

Hazard Potential

Significant

Foundations

Soil

Nid Height

17
       
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.