Although the population increased from the 1990 count of 13,900, the Census Bureau conceded that about 2,200 people were overlooked that year, city officials said. When those are accounted for, the city showed little growth or even a decline during the last 10 years. Riverton officials have announced they will challenge the 2000 census figure of 9,310, believing the count missed about 1,000 people. A city with complaints can submit its own population estimate to the Census Bureau. The government will then decide what number to use.
Lawsuits are another route.
Los Angeles is among the cities that sued seeking adjusted population estimates, and Utah went to court because it said the census missed Mormons on overseas missions. Other cities including Chicago, Buffalo, N.Y., and San Antonio are also working on challenges.