LEVAN, Juab County — The reconstruction of a 1906 dam that serves Yuba Reservoir received a countrywide award from the Affiliation of State Dam Protection Officers previous this 12 months, deemed the challenge of the 12 months around the nation.
The objective of the group is to toughen dam protection around the country, area by means of area.
Its targets come with:
- Advance and amplify the technical experience of dam house owners and dam and levee protection practitioners.
- Build up public consciousness of the position of dams in society, the dangers they provide and the significance of each dam protection and preparedness for dam disasters.
- Build up the hobby and consciousness by means of federal and state lawmakers and directors in order that rules, insurance policies, investment, and methods that serve to toughen the security of dams and levees and cut back the danger to the general public are performed..
The Utah Department of Water Rights has recognized greater than 100 dams labeled as “top danger” and now not assembly protection requirements.
Sevier Bridge Dam, the only in-built 1906 and upgraded in 2016, and DMAD (named after 4 communities Delta, Melville, Abraham and Deseret) in Millard County, are two examples of top danger dams that have been below energetic development.
It is very important word that danger constitutes the effects of the dams, now not essentially their situation. What it in reality approach is there are dangers to other folks and communities downstream from the dam will have to it fail.
On account of this, the department is in a continuing watchful and inspection mode. With 6,500 dams in Utah which might be state or privately owned, this can be a enormous problem.
A up to date challenge used to be the Sevier Bridge Dam that impounds Yuba Lake.
The dam is owned by means of the Consolidated Sevier Bridge Reservoir Corporate. The dam used to be first built in 1906, enlarged in 1916 and had some upgrades carried out in 2004. It went thru an overhaul that incorporated seismic upgrades.
At 92-feet tall and stretching 1,340-feet lengthy, the earthen dam creates a 227,000 acre-foot reservoir, making Yuba the most important privately owned reservoir within the state of Utah.
With a 5,160 square-mile drainage basin, the Sevier Bridge Dam is needed to move a likely most flood (PMF) of 53,200 cubic-feet consistent with 2nd, considerably upper than the previous spillway’s approximate 17,000 cfs capability.
A dam just right challenge
To deal with the entire operational garage and PMF necessities, a complete spillway substitute used to be vital.
The rehabilitation effort to exchange the spillway and deal with the geotechnical deficiencies started in the summertime of 2022 and used to be finished within the spring of 2024.
Matt Name, the assistant state engineer for dam protection and move alteration, mentioned the nationwide award acknowledges the level of collaboration that went into the rehabilitation.
“It used to be a in reality nice award and popularity for the challenge,” he mentioned. “The challenge used to be a in reality nice luck. There have been a large number of new options usually now not utilized in new tasks.”
This is a very important dam as a result of it’s privately owned and what sort of water it holds, he added.
“It used to be attention-grabbing to look a few of these previous historical constructions.”
A lesson discovered and reemphasized used to be the significance of making and imposing a reservoir control and emergency motion plan all through development.
The development started all through drought, however the climate modified.
“Utah then skilled its wettest iciness on document, striking the dam in a inclined place with the spring runoff season drawing near. Execution of the reservoir control and emergency motion plan helped effective song influx forecasts and the general cofferdam configuration,” the affiliation mentioned.
“The extraordinary climate all through development highlighted each the strengths and weaknesses of the Sevier River forecasting machine and will function a template for different reservoir and river programs wanting identical enhancements.”
The entire price of the challenge used to be just about $28 million, however because of legislation handed by means of the state Legislature, 90% of the prices have been picked up by means of the state.
The Key Takeaways for this newsletter have been generated with the help of huge language fashions and reviewed by means of our editorial group. The item, itself, is just human-written.
