Question: What hydroelectric system is operated by the utility district that provides electricity to Sacramento County and a small portion of adjacent Placer County in California?

Context paragraphs:
Roger Niello: Roger Niello (born 2 June 1948, San Francisco, CA) was a Republican of the California State Assembly since 2004.  He represented California's 5th Assembly District, which includes the Sacramento County cities and towns of Arden-Arcade, Carmichael, Citrus Heights, Fair Oaks, Folsom, North Highlands, McClellan Park, Orangevale, Natomas, Sacramento and the Placer County town of Granite Bay.

Sacramento County Sheriff's Department: The Sacramento County Sheriff's Department (SSD), is a local law enforcement agency that serves Sacramento County, California.  It provides general-service law enforcement to unincorporated areas of Sacramento County, as well as incorporated cities within the county that have contracted with the agency for law-enforcement services.  Currently only Rancho Cordova, and Isleton has such a contract with the department since the Citrus Heights and Elk Grove Police Departments assumed all police authority and responsibility for their communities in 2006.  It also holds primary jurisdiction over facilities operated by Sacramento County, such as local parks, marinas, and government buildings ; provides marshal service for the Superior Court of California, County of Sacramento; operates the Sacramento County Jail and the Rio Cosumnes Correctional Center in Elk Grove; and provides services such as laboratories and academy training to smaller law-enforcement agencies within the county.  The county sheriff is currently Scott Jones.

Dry Creek (Sacramento River): Dry Creek (formerly called Linda Creek) is a 15 mi long stream in Placer County and Sacramento County, California, United States, tributary to the Sacramento River.  Its watershed lies within the Sacramento Valley.  Because suburban development borders much of its length, the stream is noted for its capacity to cause local flooding and as a recreational attraction.

Mokelumne Aqueduct: The Mokelumne Aqueduct is a 95 mi water conveyance system in central California, United States.  The aqueduct is supplied by the Mokelumne River and provides water to 35 municipalities in the East Bay in the San Francisco Bay Area.  The aqueduct and the associated dams, pipelines, treatment plants and hydroelectric system are owned and operated by the East Bay Municipal Utility District (EBMUD) and provide over 90 percent of the water used by the agency.

Secret Ravine: Secret Ravine is a perennial tributary of Miners Ravine which shortly thereafter runs into Dry Creek in Placer County, California.  Its course lies within the cities of Rocklin, Loomis, and Roseville, as well as unincorporated parts of Placer County.  It passes through the campus of Sierra College.  Over its entire length the creek runs near the I-80 freeway.  It is an area becoming increasingly suburbanized.  It was the site of placer mining operations during the California Gold Rush, and areas of tailings remain to this day.  Later the drainage was a locale for granite quarrying.

Roseville Joint Union High School District: Roseville Joint Union High School District is a California school district that consists of 5 regular high schools, 2 continuation high schools and an adult school.  The district covers the cities of Roseville and Granite Bay, two suburbs of Sacramento that are located in Placer County and the eastern side of the suburb of Antelope in northern Sacramento County (east of Walerga Road).

Sacramento Municipal Utility District: The Sacramento Municipal Utility District (SMUD) provides electricity to Sacramento County, California, and a small portion of adjacent Placer County.  It is one of the ten largest publicly owned utilities in the United States, generating the bulk of its power through natural gas (estimated 56% of production total in 2009) and large hydroelectric generation plants (22% in 2009).  SMUD's green power (renewable) energy output was estimated as 19% in 2009.

Placer Parkway: Placer Parkway is a 15-mile proposed highway that would connect Highway 65 near Roseville, California to Highway 99 near the Sacramento International Airport.  The highway would traverse through portions of Sacramento County, Sutter County, and Placer County in primarily agricultural land.  It is expected to be an alternate route for Interstate 80, in hopes of easing traffic on the latter.

Placer County Transit: Placer County Transit is the operator of mass transportation in the suburbanized western portion of Placer County, California, excluding the city of Roseville.  Six route are provided, five of which use transit buses and one that uses commuter coaches as it connects Auburn with downtown Sacramento during four peak hour trips.  Another route also is designed to connect suburbanites with the Sacramento transit grid, as it travels six days per week from Auburn to the Watt/I-80 light rail station.  Three six-day-per-week local routes connect Auburn and North Auburn, Rocklin and Auburn, and Rocklin and Lincoln.  The final service offered by PCT is a twice per weekday connection between Auburn and the rural Placer County.

Upper American River Project: The Upper American River Project (UARP) is a hydroelectric system operated by the Sacramento Municipal Utility District (SMUD) of Sacramento, California in the United States.

Supporting paragraphs: Upper American River Project Sacramento Municipal Utility District
Answer: Upper American River Project