man reservoir located near california united_states largest southern_california newest capacity acre feet lake nearly doubled area surface water storage capacity provides additional water supplies drought peak summer emergency needs began billion construction project filling lake way began completed lake currently served inland lake features earth fill dams located valley north rim construction dams utilized nearby materials largest earthworks projects united_states excavation core materials dams resulted finds displayed lake east end lake open boating fishing hiking recreational activities lake geography located diamond valleys miles southwest city site chosen location cities san_diego los_angeles raw materials located site construction dams location chosen proximity miles existing supplies lake water construction planning lake began main goal meet southern_california seasonal drought emergency needs chose current site geographic location began construction planning construction lake construction dams million cubic yards foundation excavation million cubic yards embankment construction construction dams largest earthworks project united_states trucks project largest available established new standard earth rock movement rock processing plants established project provided combined production exceeding capability single commercial processing operation california construction lake largest construction project building peak reservoir construction project employed average people times people building reservoir dams start finish people employed construction project dams construction dams completed requiring excavation cubic metres foundation material earth fill dam project required cubic yards sand clay rock materials needed obtained project area core materials obtained sandy floor reservoir rock fill came bedrock highlands reservoir south rim design construction dams took consideration threat earthquakes located miles reservoir located miles reservoir west dam rises feet valley floor spans miles nearly flat valley floor bedrock ridges dam foundation area founded bedrock remainder founded dense fills buried channels feet deep foundation excavations extended feet original ground surface remove soils dam unstable earthquake minimize foundation feet thick cut walls plastic concrete constructed channels excavated feet bedrock reduce rock foundation entire core width consolidation double line curtain installed depth approximately feet west dam took years complete required miles holes mile long constructed led joint venture longest dams measures feet wide base feet wide embankment dam begin cubic yards excavated reach solid bedrock foundation embankment required cubic yards crushed rock site crushing plant crushed processed million tons rock months supply dam materials cut wall consists feet thick plastic concrete mix constructed portion bedrock varies depth feet feet totals square feet line curtain reaches depths feet foundation north segment feet south segment material construction east dam biggest trucks world dump trucks construction saddle dam rises feet lowest point north rim miles long dam built increase storage capacity lake limited lower ridge area founded completely bedrock minimize foundation line curtain extends feet foundation filling lake filling lake began water san diego canal water entered acre million basin held water pumped pumping station pumping station named founders features horsepower pumps moving water intake outlet tower pumps converted hydroelectric turbine generators capable producing power pumps converted entire facility produce power water pumped pumping station located outside west dam foot long foot diameter pipe lake tower peak rate water flowed lake cubic feet second filling lake finished lake began filled water provided inland nearly years source water lost drought conditions required tap lake water threat invasive species contaminated southern_california lakes served finds excavation bones skeletons found extinct dire wolf long california uncovered thousands fossils diamond valleys add immensely store public knowledge region collectively animal fossils named finds species provide unique inland southern california ice ages bridge massive information gap fossil deposits tar pits los_angeles california ice age sites unofficially diamond area referred valley fossils diamond valley lake site comprise classic late pleistocene includes following extinct animals ground ground dire wolf giant short faced bear cat american lion leo american western horse small horse flat headed yesterday ancient long minor fossils rabbits pond turtles deer black bear recovered common animals identified diamond valley lake site scientists extinct american north american thought solitary forest dwelling abundance fossil record site suggests ice age diamond valley lake site wooded forested today fossil remains pine recovered site lend interpretation dating fossil plants diamond valley lake site confirms age range years ago years ago fossils recreation offers fishing light boating lake recreation park aquatic center visitor center lake marina located eastern end lake viewpoint offering views pumping station tower lake located western end lake south lake acre preserve skinner reservoir reserve home sensitive endangered threatened native california bird animal plant species lake fish began reservoir filled small pond placed valley lake species freshwater fish bass bass rainbow trout striped bass channel considered best fisheries california area lake remains undeveloped original plans included large recreation areas eastern western end lake complete golf courses swimming lakes water parks amenities plans building additional recreation facilities lack funding lack support developers prevented
Diamond Valley Lake