These paragraphs explain Riverton City’s drainage way history and how it has evolving to the current stormwater system. These paragraphs also introduces the stormwater challenges.
Three primary creek systems cross Riverton City which flow from the west to the east. Rose Creek is located at the southern boundary and Midas Creek on the northern boundary. Butterfield Creek was historical located more-less through the center and the creek split somewhere around 4000 West but the only remaining remnants begin at Redwood Road at 11850 South and 13500 South. Riverton is divided by five canals which flow from the south to the north. Beginning on the east boundary is the Beckstead Ditch, South Jordan Canal, Utah and Salt Lake Distributing, Utah Lake Distributing and the furthest west is the Welby Canal, also know as the Provo River or Highland Canal. Farming practices slowly filled creek with soil and canals dammed and diverted the flows into the canals slowly causing Butterfield Creek to shrink and later residential development ultimately erased its existence across most of the City except for the eastern quarter.
Riverton grew rapidly starting in the 1990’s and continues to develope today. Like many cities of the time it was changing from a rural community to an urban city. Early development occurred with little or no stormwater detention requirements. The primary drainage ways receiving the new urban developments unrestricted runoff were the five canals and Rose and Midas Creeks. However, by the year 1995 it was necessary for most developments to need detention systems. Commercial uses prior to the growth years were minimal and where they did exist most drainage systems were surface in nature and drained to irrigation ditches that also received stormwater runoff from unimproved rural type roadways. The piped systems that existed near these sites today were built with roads improvements as the City urbanized during the growth years.
Much of the challenges come from the fact that many subdivisions do not have their own detention systems. The canals primarily served this role and the early developments that could discharge to the creeks had no detention at all. Also Rose and Midas and the canals had to pick up the load from the Butterfield Creek basin. This required expensive piped systems to carry the abandoned Butterfield basin to Rose and Midas where possible. The remaining runoff had to be discharged to canal requiring overflows from the canals to these creeks for the additional runoff of an urbanizing City.
In 2002 UDOT improved 12600 South which included a conveyance from the westside of the City to the Jordan River, however, betterment cost prohibited including much of the already built out Butterfield basin which resulted in a 12600 South system basin that mainly included the 12600 South frontage properties only.