Expansion Joints:  There are areas where the concrete lining has pushed up due to high temperatures expanding the concrete panels.  Historically this happens in the same locations along the canal.  When the District has to shut down in water short years, this exacerbates the situation.  The District has, over time, developed an expansion joint design…

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Wasteway #7 pump and intake structure upgrade:  Wasteway #7 Reregulation reservoir is located approximately one half mile upstream of the end of the main canal. There is a 10-acre-foot regulation reservoir there with a single variable speed turbine pump. Given the changes in on farm irrigation demands this pump is undersized and not able to…

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Lining drain exits, 1 Project: The Roza Irrigation District has been working in the Moxee valley on the main canal lining. Portions of main canal floor have not had the life expectancy the District would have expected. The District has been working to identify reasons for this.  One of the solutions the District is pursuing…

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Curtosey Valves: During the early years of the ECS projects the District allowed landowners with a house on large parcels to have a courtesy valve.  This was a small unmeasured valve they could use to irrigate their yard.  As the District has evolved with these projects, we have successfully used smaller meters to deliver to…

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Sparling Replacements: Sparling is the brand of flowmeter the District first installed when enclosing laterals and replacing concrete weir boxes with flowmeter deliveries. Replacement parts are very costly, so the District has begun replacing them with our present day McCrometer meters. To date 18 have been updated. There are 132 still to be updated. We…

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Gravel Pack Retrofits:  The District, over time, developed gravel packs which utilize slotted PVC Pipe placed along the lower embankment and encased in rock.  They prevent aquatic weeds that are suspended in the canal water from entering turn out pipes and clogging flowmeters.  They reduce time spent on cleaning both flowmeter impellers as well as…

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Equipment Ramps:  The District has created a plan for placement of equipment ramps in the main canal throughout the Moxee Valley. These ramps are necessary due to all the work to be performed on the main canal lining in the Moxee Valley and the limited clearance under road bridges crossing the main canal prevent trucks…

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AquaLastic Sealing: The concrete lined sections of the Roza Canal were designed with lining drains running longitudinally under the concrete liner with exits spaced approximately every 0.2 miles at locations where the water would gravity flow away from the Main Canal. The lining drains were intended for carrying ground water away from the liner during…

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ECS: The Board of Directors, officially adopted, in 1984, a long-term rehabilitation program of District conveyance facilities with a targeted completion date of 20 years. Various elements of the program will be constructed each year by District forces. A major part of this effort is to pipe all laterals, beginning with gravity lands. Thirty-three years…

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