Quaggas in Diamond Valley

[catchaser]

worst than i thaught it comes from Colorado River Aqueduct google the lake and see

[exfactor]

Hey, they got computerized fishing licenses now, only took them 10 years before they caught up with other states doing it. Should be about another 10 before they utilize the computer with our CF numbers, and use their heads.....................not. The beaucrats that run this state are clueless, and hate change

[fish-o-haulic]

Where did you get this information fish-o-haulic? Why would DFG employees hate fishing? It's their entire line of work. Seems like quite a charge, just curious if you have anything to support it. I've talked to plenty of DFG guys and they all seem to be pretty nice and as long as I've followed the rules very pleasant to talk with and very interested in how the fishing is going. Have you met a bunch of DFG employees that hate fishing? Seems kind of a strange career choice if you hate it.

dfg always gives me a hard time whenever i see them. i shouldnt have said they hate fishing, but with the way some of them act youd think they do hate it. not all dfg are like that, just the ones i know. i also have heard of other peoples bad experience with them. for the ones that hate it i think its just a case of certain people that hate their job and take it out on others, cuz ur right it wouldnt make sense for them to hate fishing. ive met some nice ones in the past, one even helped are car out of the mud. just sayin ther are some mean ones out there.

[HawgZWylde]

You'd think the simple fact that the lake was getting filled with water from the Colorado forever would mean that Quaggas are already in the lake.

Apparently it's rocket science.

Indeed. Quagga mussle larvae are microscopic, and float where the water goes. If they did in fact use Colorado River aquaduct water, Quagga's are definitely already in the lake...

[catchaser]

Diamond Valley Lake
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Diamond Valley Lake

Location Riverside County, California, USA, near Hemet
Coordinates 33°40′57″N 117°02′03″W / 33.6825°N 117.03417°W / 33.6825; -117.03417Coordinates: 33°40′57″N 117°02′03″W / 33.6825°N 117.03417°W / 33.6825; -117.03417
Lake type Reservoir
Basin countries United States

Max. length 4.5 mi (7.2 km)
Max. width 2 mi (3 km)
Surface area 4,500 acres (18 km2)
Max. depth 260 ft (79 m)

Diamond Valley Lake is man-made reservoir located in Hemet, California, United States. It is one of the largest reservoirs in Southern California and also one of the newest. With 800,000 acre feet (990,000,000 m3) of water, The lake nearly doubled the area’s surface water storage capacity and provides additional water supplies for drought, peak summer, and emergency needs.[1]

The Metropolitan Water District of Southern California began the $1.9 billion construction project in 1995. Filling of the lake, by way of the Colorado River Aqueduct began in 1999 and was completed in 2003.[2] The lake is currently served and filled by the Inland Feeder.

The lake features three earth fill dams; two on either side of the valley and one on the south rim. Construction of the dams took advantage of nearby materials, and was one of the largest earthworks projects in the United States. Excavation of core materials for the dams resulted in many paleontological finds, all of which are displayed at the Western Science Center at the lake's East end. The lake is open to boating and fishing, along with hiking and other recreational activities around the lake.

Contents [hide]
1 Geography
2 Construction
2.1 Dams
2.1.1 West Dam
2.1.2 East Dam
2.1.3 Saddle Dam
2.2 Filling the lake
3 Paleontological finds
4 Recreation
5 References
6 External links


[edit] Geography
Diamond Valley Lake is located within the Domenigoni/Diamond valleys, 4 miles (6.4 km) southwest of the city of Hemet. The site was chosen because of its location between the cities of San Diego and Los Angeles, and because of the raw materials located on-site for the construction of the three dams. The location was also chosen because of its vicinity, about 5 miles (8.0 km), to the existing Colorado River Aqueduct that is used to supply the lake with water.[3]

[edit] Construction
Planning for the lake began in early 1987. The main goal was to find a way to meet Southern California seasonal, drought and emergency needs. MWD choose the current site, because of its geographical location, and began construction planning in 1993.[2] Construction of the lake in 1995 with construction of the three dams. With over 40 million cubic yards of foundation excavation and 110 million cubic yards of embankment construction, the construction of the dams was the largest earthworks project in the United States. The shovels, loaders and trucks used on the project were the largest available in the industry and established a new standard for earth and rock movement. The two rock processing plants set up for the project provided combined production exceeding the capability of any single commercial processing operation in California.[4] Construction of the lake was the largest construction project by the MWD since building the Colorado River Aqueduct.[5]

At its peak in 1997 and 1998, the reservoir construction project employed an average of 1,800 people. At times, more than 1,900 people labored in building the reservoir’s three dams. From start to finish, about 5,000 people were employed by the construction project.[6]

[edit] Dams

The west dam of Diamond Valley LakeConstruction of the three dams was completed in 1999, requiring the excavation of 31,000,000 cubic metres (41,000,000 cu yd) of foundation material. The earth fill dam project required about 110,000,000 cubic yards (84,000,000 m3) of sand, clay and rock. Much of the materials needed were obtained from the project area. Core materials were obtained from the silty and clayey sandy alluvium in the floor of the reservoir and the rock fill came from the bedrock highlands of the reservoir's south rim. Design and construction of the dams also took into consideration the threat of earthquakes with the San Jacinto Fault located about 6 miles (9.7 km) from the reservoir and the San Andreas fault located about 19 miles (31 km) from the reservoir.[3]

[edit] West Dam
The west dam rises to 285 feet (87 m) above the valley floor. It spans 1.5 miles (2.4 km) over a nearly flat alluvial valley floor between bedrock abutment ridges.[3] About 65% of the dam's foundation area is founded on quartzite and phyllite bedrock; the remainder is founded on dense alluvium that fills three buried channels, which are up to 120 feet (37 m) deep. The foundation excavations were extended 90 feet (27 m) below the original ground surface to remove liquefaction soils that would have made the dam unstable in an earthquake. To minimize foundation seepage through the alluvium, 3 feet (0.91 m) thick cut-off walls of plastic concrete were constructed across the three alluvial channels and excavated at least 2 feet (0.61 m) into bedrock. To reduce seepage through the rock foundation, the entire core width was consolidation grouted and a double-line grout curtain was installed to a depth of approximately 125 feet (38 m). Grouting of the west dam took about two years to complete and required 189 miles (304 km) of grout holes.[3]

[edit] East Dam
The 2.1 miles (3.4 km) long East Dam, constructed by a Kiewit-led joint venture, is the longest of the three dams. It measures 1,200 feet (370 m) wide at the base and 40 feet (12 m) wide at the top. Before embankment of the dam could begin, more than 18,000,000 cubic yards (14,000,000 m3) of alluvium had to be excavated to reach a solid bedrock foundation.[3]


The Saddle dam and I/O tower at Diamond Valley Lake
The forebay and pumping stationThe embankment required 43,000,000 cubic yards (33,000,000 m3) of crushed rock. An on-site crushing plant crushed and processed over 14 million tons of rock in 20 months to supply the dam's materials. The cut-off wall, which consists of a 3 feet (0.91 m) thick plastic concrete mix constructed through the weathered portion of bedrock, varies in depth from 10 feet (3.0 m) to 110 feet (34 m) and totals 250,000 square feet (23,000 m2). A two-line grout curtain reaches depths of 150 feet (46 m) below the foundation in the north segment of the East Dam and 100 feet (30 m) in the south segment.[3]

Because of the amount of material use in the construction of the east dam, some of the biggest trucks in the world had to be brought to the site. Twelve Caterpillar 789 dump truck's were used in construction of the East Dam. The trucks, costing $1.4 million each, weighed up to 350 tons when full of rock, and use a 1,800 horsepower (1,300 kW) engine that burns 40 gallons of fuel per hour. They were so big that they had to be brought to the reservoir site in pieces and assembled on site.[6]

[edit] Saddle Dam
The Saddle Dam rises 130 feet (40 m) above the lowest point in the ridgeline of the north rim and is around 0.5 miles (0.80 km) long. The dam was built to increase the storage capacity of the lake, which would have been limited due to the lower ridge in this area. It is founded completely on phyllite and schist bedrock. To minimise foundation seepage, a two-line grout curtain extends up to 100 feet (30 m) below the foundation.[3]

[edit] Filling the lake
Filling of the lake began in 1999 with water provided by the Colorado River Aqueduct and San Diego Canal. Water would first enter the fore-bay, a 35-acre (140,000 m2) 163 million gallon basin that held the water before being pumped through the pumping station. The pumping station, named after one of the founders of the MWD, Hiram W. Wadsworth,[5] features twelve 6,000 horsepower (4,500 kW) pumps for moving water from the forebay to the intake-outlet (I/O) tower.[7] In 2001, four of the twelve pumps were converted to hydroelectric turbine generators capable of producing 3 megawatts of power each. If all the pumps were converted, the entire facility could produce up to 40 megawatts of power.[8]

Water is pumped from the pumping station, located just outside of the west dam, through a 2,000-foot (610 m) long, 16-foot (4.9 m) diameter pipe and into the lake via the I/O tower. At peak rate, water flowed into the lake at 1,000 cubic feet (28 m3) per second. Filling of the lake finished in 2003[9]

In 2009, the lake began being filled with water provided by the Inland Feeder after nearly two years without a source. The water replenished much of what was lost after drought conditions required the MWD to tap into the lake. Water from the Colorado River Aqueduct is not being used due to the threat of the Quagga mussel, an invasive species that has already contaminated other Southern California lakes served by the aqueduct.[10]

[edit] Paleontological finds

A Paramylodon harlani on display at the Western Science CenterDuring excavation, bones and skeletons were found from extinct mastodons, mammoth, camel, sloth, dire wolf and long-horned bison. Paleontologists from the San Bernardino County Museum in Redlands, California uncovered thousands of fossils in the Diamond and Domenigoni valleys that will add immensely to the store of public knowledge about the region. Collectively, these animal fossils are named the Diamond Valley Lake Local Fauna.[11]

The paleontological finds of mammoth, mastodon, bison, and other Pleistocene Epoch species from Diamond Valley Lake provide a unique snapshot on inland southern California during the Ice Ages, and bridge a massive data gap between fossil deposits at La Brea tar pits in Los Angeles, California and Ice Age sites in the Mojave Desert. Unofficially, the Diamond Valley Lake area is often referred to as the "Valley of the Mastodons". Fossils from the Diamond Valley Lake site comprise a classic late Pleistocene assemblage which includes the following extinct animals:[11]

Jefferson’s ground sloth, Megalonyx jeffersonii
Harlan’s ground sloth, Paramylodon harlani
Dire wolf, Canis dirus
Giant Short-faced bear, Arctodus simus
Sabre-toothed cat, Smilodon fatalis
American lion, Panthera leo atrox
American mastodon, Mammut americanum
Columbian mammoth, Mammuthus columbi
Western horse, Equus “occidentalis”
Small horse, Equus conversidens
Flat-headed peccary, Platygonus compressus
“Yesterday’s” camel, Camelops hesternus
Ancient bison, Bison antiquus
Long-horned bison, Bison latifrons
Diminutive Pronghorn, Capromeryx minor
Many fossils of rabbits, rodents and pond turtles, as well as coyotes, deer and the Black bear, have been recovered as well. One of the most common animals identified from the Diamond Valley Lake site by San Bernardino County Museum scientists was the extinct American mastodon, Mammut americanum.[11][12] In North American paleontology, mastodons are thought to have been solitary forest-dwelling browsers. The abundance of mastodons in the fossil record from the site suggests that, during the last Ice Age, the Diamond Valley Lake site was more wooded or forested than today. Fossil remains of ponderosa pine and manzanita recovered from the site lend credence to this interpretation.[12] Radiometric dating of fossil plants from the Diamond Valley Lake site confirms an age range of less than 13,000 years ago to more than 60,000 years ago for these fossils.[12]

[edit] Recreation
Diamond Valley Lake offers fishing and light boating on the lake. A recreation park, aquatic center, visitor center and the Western Science Center along with the lake marina are located on the eastern end of the lake. A viewpoint, offering views of the pumping station and I/O tower, along with most of the lake is located on the western end of the lake. To the south of the lake is the Southwestern Riverside County Multi-Species Reserve, a 13,500 acres (55 km2; 21.1 sq mi) preserve between Diamond Valley Lake and Lake Skinner. The reserve is home to at least 16 sensitive, endangered or threatened native California bird, animal and plant species.[13]

Stocking of the lake with fish began before reservoir was filled with a small rearing pond being placed on the bottom of the valley. The lake has several species of freshwater Fish; Largemouth Bass, Smallmouth Bass, Bluegill, Crappie, Rainbow Trout, Striped Bass, Channel Catfish, and Shad. It is considered one of the best fisheries in California.[14]


The East Dam and recreation park of Diamond Valley Lake. The aquatic center and Western Science Center can be seen at the far right.
Much of the area around the lake remains undeveloped and empty. Original plans included large recreation areas on both the eastern and western end of the lake complete with golf courses, camping grounds, swimming lakes, water parks and other amenities. The MWD still plans on building the additional recreation facilities, but lack of funding and lack of support from developers has prevented them from doing so.[15]

[edit] References
^ "Creating Diamond Valley Lake". dvllake.com. http://www.dvlake.com/general_info06.html. Retrieved 2010-09-19.
^ a b "Eastside Reservoir Project (Diamond Valley Lake) Specs". water-technology.net. http://www.water-technology.net/proj...res/specs.html. Retrieved 2010-09-19.
^ a b c d e f g "Eastside Reservoir Project (Diamond Valley Lake), California, USA". water-technology.net. http://www.water-technology.net/projects/eastside_res/. Retrieved 2010-09-19.
^ "Construction". dvllake.com. http://www.dvlake.com/general_info09.html. Retrieved 2010-09-19.
^ a b "Hiram Wadsworth fitting name for massive Hemet reservoir" (PDF). Pasadena Star News. January 5, 2000. http://www.brickonline.com/Wadsworth%20Reservoir.pdf. Retrieved 22 November 2010.
^ a b "Building The Lake". dvllake.com. http://www.dvlake.com/general_info04.html. Retrieved 2010-09-19.
^ Silva, Andrew (March 19, 2000). "Diamond Valley Lake Resrvour Dedicated Project Doubles Region's Storage Capacity". Daily News. http://www.thefreelibrary.com/DIAMON......-a083421758. Retrieved 2010-09-19.
^ "Hiram W. Wadsworth Hydroelectric Generator at Diamond Valley Lake". MWDh2o.com. http://www.mwdh2o.com/mwdh2o/pages/y...dsworth01.html. Retrieved 2010-09-19.
^ "Flowing Along". dvllake.com. http://www.dvlake.com/general_info03.html. Retrieved 2010-09-19.
^ Pratte, Bob (June 20, 2009). "Water deliveries back at lake". The Press Enterprise.
^ a b c Springer, K., E. Scott, J.C. Sagebiel, and L.K. Murray (2009). The Diamond Valley Lake local fauna: late Pleistocene vertebrates from inland southern California. In Papers on Geology, Vertebrate Paleontology, and Biostratigraphy in Honor of Michael O. Woodburne (ed. L.B. Albright III). Flagstaff: Museum of Northern Arizona. pp. 217–235.
^ a b c Springer, K., E. Scott, J.C. Sagebiel, and L.K. Murray (2010). "Late Pleistocene large mammal faunal dynamics from inland southern California: the Diamond Valley Lake local fauna". Quat. Int. 217: 256–265. doi:10.1016/j.quaint.2009.10.041.
^ "About Diamond Valley Lake". dvllake.com. http://www.dvlake.com/general_info01.html. Retrieved 2010-09-19.
^ "Frequently Asked Questions: Fishing". dvmarina.com. http://www.dvmarina.com/faq/fishing.php. Retrieved 2010-09-19.
^ Atienza, Herbert; Shen, Erica (February 10, 2009). "Without financing, Diamond Valley Lake plans flounder". The Press Enterprise. http://www.pe.com/localnews/inland/s...0.47f416c.html. Retrieved 2010-09-19.
http://fishingnetwork.net/forum4/for...y-Lake-Reports

Diamond valley offers some of the most diverse fishing in California. Anglers have the option to fish multiple species and all ability levels of fishermen are tested. DVL offers shoreline fishing and boat fishing. Every year fishing records are posted.
[edit] External links
Official site
Retrieved from "http://en.wikipedia.org/wiki/Diamond_Valley_Lake"
Categories: Reservoirs in California | Lakes of Riverside County, California | Buildings and structures in Riverside County, California
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[30lber]

Um, then explain why Lake Matthews is closed?

No fishermen means they don't have to staff anyone at the lake. That saves them, oh, 15 paychecks every 2 weeks.

mathews is still feeding the southern parts of california.

[Fishbreath]

Diamond Valley Lake
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Diamond Valley Lake

"............Filling of the lake began in 1999 with water provided by the Colorado River Aqueduct and San Diego Canal. .......... Filling of the lake finished in 2003[9]

In 2009, the lake began being filled with water provided by the Inland Feeder after nearly two years without a source. The water replenished much of what was lost after drought conditions required the MWD to tap into the lake. Water from the Colorado River Aqueduct is not being used due to the threat of the Quagga mussel, an invasive species that has already contaminated other Southern California lakes served by the aqueduct.........[10]"

The lake was originally filled from the Colorado River, but that source is no longer used. Mussels were first identified at Lake Havasu in 2007. It appears that Diamond Valley had been without a source for two years when they started refilling it in 2009. They must have stopped using Colorado River water in 2007 when the mussels were first found. The big question is whether any mussels or larvae found their way into DVL from the river before 2007. Obviously, if the mussels are now already in DVL, the question becomes moot unless the MWD is looking for a scapegoat, and then recreational fishermen are easy targets.

[KID CREOLE]

Well I think the jury is still out on the quaggas.

I fish the Western Outdoor News Striper Derby every year at Havasu and noticed 3-4 years ago that the water Wwas extremely clear compared to other years and the Striper fishing was getting tougher which was about the time the quaggas got into the lake.

Well, this year as we brought our fish to the weigh in and 3 biologist from the Arizona F&G asked us to examine our fish so we allowed them and as they examined the fish it was pretty clear the fish were much thicker than year past.

Over this same period of time we also noticed that the stripers were full of crawfish. Well the 3 biologist hinted that the crawfish population was on the rise and asked us had we noticed more smallmouth lately which we had!

These 3 biologist hinted, I repeat hinted that the crawfish were eating the quaggas and the small mouth and stripers were gorging on the crawfish.

Well, this year our stripers were the fattest and healthiest we've seen in years so who knows

[viperman100]

Well I think the jury is still out on the quaggas.

I fish the Western Outdoor News Striper Derby every year at Havasu and noticed 3-4 years ago that the water Wwas extremely clear compared to other years and the Striper fishing was getting tougher which was about the time the quaggas got into the lake.

Well, this year as we brought our fish to the weigh in and 3 biologist from the Arizona F&G asked us to examine our fish so we allowed them and as they examined the fish it was pretty clear the fish were much thicker than year past.

Over this same period of time we also noticed that the stripers were full of crawfish. Well the 3 biologist hinted that the crawfish population was on the rise and asked us had we noticed more smallmouth lately which we had!

These 3 biologist hinted, I repeat hinted that the crawfish were eating the quaggas and the small mouth and stripers were gorging on the crawfish.

Well, this year our stripers were the fattest and healthiest we've seen in years so who knows

Even if this is true and accurate, I thought the problem with the mussle introduction into a body of water was the additional maintance required to keep the pumps clean and working properly, if this is so then I dont think MWD really cares if the fish we catch will be fatter and healthier. Also maybe someone can comment on how the mussles may affect the shad population and how that may initially affect the fish population, with the shad being the main food source for most of the gamefish in DVL.

[Fishbreath]

Also maybe someone can comment on how the mussles may affect the shad population and how that may initially affect the fish population, with the shad being the main food source for most of the gamefish in DVL.

Here is a link to a recently released study done on that very issue at Lake Mead. http://www.aquaticinvasions.net/2011...oomis_etal.pdf. Quaggas are highly efficient water filterers, removing substantial amounts of phytoplankton, which in turn decrease the food source for zooplankton. So, yes. Quaggas compete with shad for food. The study failed to show an identifiable impact of the number of shad at Lake Mead so far, but again the jury is still out. What the study did not address was the size the shad. They talked about total biomass and all those other fancy terms biologists like to use, but I never saw where they spoke of the impact on the size of the shad. My observations are strictly anecdotal, but it seems to me that shad grow bigger in nutrient rich lakes. Crappie and bluegill might like their shad small, but it seems to me that bass prefer them the bigger the better.

Not part of that study, but I think we have seen that quaggas themselves may provide a new food source for some species. A 5.55 lb redear sunfish was recently caught at Lake Havasu that will be a new world record if approved. Redears, also known as shellcrackers, are apparently thriving because of the quaggas.