The InfoSWMM model was used to calculate future flows and assign the flows to the appropriate pipes. New pipes were added to the western portion of the City in potential future road locations, and pipes were sized to accommodate the predicted flow from the City's Land Use Map. The capacity analysis is shown in Figure 6-2 (See Appendix A for the large-scale figure) and the observed deficiencies are as follows:
• 9000 South/Old Bingham Highway
- The main trunk line in 9000 South starting in Old Bingham Highway near 4600 West to Redwood Road varies in size and does not have adequate capacity. The 21-inch pipeline from Redwood Road to Jordan River Parkway is also approaching the 0.75 depth of flow to diameter of pipe (d/D) ratio level of service. In discussion with city staff it was also decided to include this section of the collection system since there are going to be improvements done along 9000 South and it would be economical to complete this upsizing at that time.
• 7800 South (West)
- The 7800 South 15-inch pipeline between Mountain View Corridor and Highland Loops Road is over capacity.
• Wells Park Road
- The pipes in Wells Park Road in the industrial park require additional capacity to provide the appropriate LOS as growth occurs.
• Jordan River Parkway
- Approximately 1,300 feet of existing 24-inch pipeline under Jordan River Parkway between 9000 South and 8800 South does not have enough slope to carry future flows.
• Bagley Park Road
- The pipe in Bagley Park Road in the industrial park is nearing capacity and is deteriorating due to age.
• 7800 South (East)
- The existing 36-inch pipeline in 7800 South from 1300 West to 1200 West needs to be replaced due to inadequate slopes that limit the capacity of the existing pipeline.
• 7000 South
- The 7000 South 12-inch and 15-inch pipelines from Bangerter Highway to 3200 West are nearing capacity and are deteriorating due to age.
There are other segments of pipes shown as red in Figure 6-2. These are identified as existing deficiencies in Figure 6-1, may have invert elevation or pipe size data that needs to be updated, or should be monitored as the City continues to grow.
