Update on 2019 Tunnel Collapse and Canal Washout, Irrigation Water Outlook for 2021

Goshen/Gering-Fort Laramie supply canal Tunnel No. 1
Image 1. Irrigation water flows through Tunnel No. 1 on the Goshen/Gering-Fort Laramie supply canal in 2021.

Update on 2019 Tunnel Collapse and Canal Washout, Irrigation Water Outlook for 2021

Irrigation is in full swing for the North Platte Valley in the Panhandle of Nebraska. 

Water deliveries by the four major irrigation districts (Pathfinder, Gering-Fort Laramie, Goshen and Farmers) are expected to be near normal. The districts hope to deliver water to growers through the first week in September.

Tunnel No. 2 before collapsing
Image 2. Irrigation water flows through Tunnel No. 2 on the Goshen/Gering-Fort Laramie supply canal in 2021; this is the tunnel where the collapse occurred in 2019.
Tunnel No. 2 after collapsing
Image 3. The collapse site above Tunnel No. 2 on the Goshen/Gering-Fort Laramie supply canal, as it appears in the summer of 2021, two years after the collapse. Subsequent repairs allow the tunnel to carry 97% of the previous maximum capacity.

All of that depends on what Mother Nature brings. In the event of higher-than-normal temperatures for an extended time period, the irrigation districts might need to allocate water or cut back on the number of days water is delivered.

The major drawback to all of this is that much of the water in storage in mainstem reservoirs in Wyoming will be used up this year, leaving a lesser amount in the reservoirs for the 2022 growing season. An above-normal snowpack and runoff in the mountains will be needed to fill the reservoirs.  

After the collapse of Tunnel No. 2 on the Goshen/Gering-Fort Laramie main canal in 2019, temporary repairs were made to Tunnels No. 1 and 2. Steel “ribs” were installed inside the tunnels to give support to the concrete tunnel walls.

Installation of the ribs restricted water flow to 80%-85% of full capacity, and water flow for the 2020 growing season was reduced to approximately 1,200 cubic feet per second (cfs).

During the winter of 2020-21, metal sheeting was installed over the ribs to decrease water turbulence and increase flow through these tunnels. The tunnels are now flowing at 1,400 cfs, which is 97% of their previous maximum capacity of 1,450 cfs.  

Permanent repairs to the tunnels still have to be completed, the final plans pending approval from the U.S. Bureau of Reclamation.

Online Master of Science in Agronomy

With a focus on industry applications and research, the online program is designed with maximum flexibility for today's working professionals.

A field of corn.