Editing Beaumont, California (section)

===20th century growth===
[[File:CA 20 I10 NARA 1963 940.jpg|thumb|right|Interstate 10 in Beaumont, 1963]]
During the [[Cold War]], a [[Lockheed Corporation|Lockheed]] rocket test site operated by [[Simi Valley, California|Simi Valley]]–based [[Rocketdyne]] was established south of the town in Potrero Canyon. In late 2003, the majority of the Potrero Canyon site was sold to the state of California. Toxic chemicals used in rocket fuel and site test activities have been found in the soil and groundwater at the site, and planning is underway to begin cleanup sometime in the next few years. Plans are being developed by the [[California Department of Fish and Game]] to allow public access.

With the housing boom in the early decade, the [[urban sprawl]] reached the last remaining valleys of the [[Inland Empire (California)|Inland Empire]]. Since 2000, with Beaumont's proximity to [[Los Angeles, California|Los Angeles]], various Southern California residents have moved to the San Gorgonio Pass region for its low housing cost, causing a 20% jump in the city's population, making it the fastest growing city in the state.<ref name="Forbes">{{cite news | first= Matt | last= Woolseey | title= America's Fastest-Growing Suburbs | url= https://www.forbes.com/2007/07/16/suburbs-growth-housing-forbeslife-cx_mw_0716realestate.html | work= Forbes.com | date= July 16, 2007 | access-date=April 10, 2008 }}</ref> This has concerned many local residents who cite increasing student population in schools, rising demand on the water supply, and increasing traffic through the city on [[Interstate 10 in California|Interstate 10]] in both directions. A 2008 study by the [[Public Policy Institute of California]] noted that Beaumont and its neighboring communities in the nearby San Jacinto Valley have registered the highest population growth throughout Riverside County and that the region was projected to increase by 4.5% a year to 310,000 by 2015.<ref>{{cite news |first=David |last=Kelly |title=Inland Empire's growth to continue |url=http://www.latimes.com/news/local/la-me-growth10apr10,1,1584383.story |work=Los Angeles Times |date=April 10, 2008 |access-date=April 10, 2008 |archive-url=https://web.archive.org/web/20080411232007/http://www.latimes.com/news/local/la-me-growth10apr10%2C1%2C1584383.story |archive-date=April 11, 2008 |url-status=dead  }}</ref>

Beaumont is home to many master-planned communities.<ref>{{Cite news|url=https://www.nytimes.com/2019/12/10/realestate/beaumont-calif-growing-fast-but-still-a-bedroom-community.html|title=Beaumont, Calif.: Growing Fast, but Still a Bedroom Community|last=Kamin|first=Debra|date=December 10, 2019|work=The New York Times|access-date=December 10, 2019|language=en-US|issn=0362-4331}}</ref> The following communities are currently under construction or have been built: Oak Valley Greens, Three Rings Ranch, Solera by [[Del Webb]] (later sold to [[Pulte Homes Inc.]]), Olivewood by Taylor Morrison, Sundance and Tournament Hills by Pardee Homes, Four Seasons by K. Hovnanian and Fairway Canyon. Except for Oak Valley Greens and Three Rings Ranch, these communities operate under HOAs and are similar to developments in [[Redlands, California|Redlands]], [[Rancho Cucamonga, California|Rancho Cucamonga]], and some [[Orange County, California|Orange County]] suburbs.