Sherman Dam
Sherman Dam is located in Bone County, and physically separates Sherman Reservoir from the remaining waterways in San Andreas. This enormous structure is based on Nevada's Hoover Dam, and provides nearby Las Venturas with hydroelectric power.
Events of GTA San Andreas
After arriving in Las Venturas to meet with Wu Zi Mu (Woozie) at his new headquarters, Carl Johnson begins planning a heist of Caligula's Palace, located just up The Strip from Woozie's Four Dragons Casino. Caligula's is being taken over by the Leone Family, giving Carl the opportunity to gain the trust of Salvatore Leone and provide himself a cover for planning the heist.
As part of the preparations he makes, Carl sets off to plant remotely detonated explosive charges on the generators providing the city's power, which will allow his team to access Caligula's vault under the cover of darkness and the resulting confusion. In order to plant the explosives, Carl boards a Nevada waiting for him at his abandoned airstrip outside of Las Venturas, and parachutes his way onto the dam quay, where he stealthfully makes his way inside the complex. Once there, Carl sneaks past security guards and plant technicians in order to place the explosive charges. On his way out, Carl is trapped on the top of one of the dam's intake towers, and is forced to perform a swan-dive into Sherman Reservoir in order to evade capture.