Don Pedro Dam: Difference between revisions
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{{Short description|Remnant dam in California}} |
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{{Split|Don Pedro Dam|New Don Pedro Dam}} |
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{{use mdy dates|date=October 2021}} |
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{{Infobox_Dam |
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{{Infobox dam |
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|dam_name= Don Pedro Dam |
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| name = Don Pedro Dam |
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|image=NewdonpedrodamUSGS.jpg |
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| name_official = Old Don Pedro Dam |
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| image = OldDonPedroDam.jpg |
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|official_name= New Don Pedro Dam |
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| image_caption = Old Don Pedro Dam and reservoir, ''circa'' 1925 |
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|crosses= [[Tuolumne River]] |
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| image_size = |
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|reservoir= [[Don Pedro Reservoir]] |
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| coordinates = {{coord|37.7125|N|120.4020|W|type:landmark|display=inline,title}} |
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|locale= [[La Grange, California]] |
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| location = [[Tuolumne County]], [[California]] |
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|type=Earthen embankment |
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| construction_began = |
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|maint= Turlock Irrigation District and Modesto Irrigation District |
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| opening = {{start date and age|1924}} |
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|length= {{convert|1900|ft|m}} |
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| cost = |
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|height=585 feet (178 m) |
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| owner = |
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|width=2,800 feet (853 m) |
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| dam_type = Concrete thick arch/gravity |
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|volume={{convert|16750000|yd3|m3}} |
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| dam_length = {{convert|1000|ft|abbr=on}} |
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|spillway_type=Gated overflow |
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| dam_height = {{convert|283|ft|abbr=on}} |
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|spillway_capacity= |
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| dam_width_base = {{convert|170|ft|abbr=on}} |
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|began= September 1967 |
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| dam_width_crest = {{convert|16|ft|abbr=on}} |
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|open=1971 |
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| dam_volume = |
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|closed= |
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| dam_crosses = [[Tuolumne River]] |
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|cost= |
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| spillway_type = |
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|reservoir_capacity= {{convert|2030000|acre feet|m3}} |
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| spillway_capacity = |
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|reservoir_catchment= {{convert|1542|mi2|km2}} |
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| res_name = [[Don Pedro Reservoir]] |
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|reservoir_surface={{convert|12960|acre|ha}} |
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| res_capacity_total = {{convert|290400|acre.ft|m3|abbr=on}} |
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|turbines = 4 [[Francis turbine|Francis type]] |
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| res_catchment = |
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|installed_capacity = 203 MW |
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| res_surface = |
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| res_max_depth = |
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|annual_generation = |
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| plant_operator = |
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|map_cue= |
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| plant_turbines = 4 |
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|map_image= |
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| plant_capacity = 30 MW |
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|map_text= |
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| plant_annual_gen = |
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|map_width= |
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| plant_commission = |
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|coordinates= |
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| plant_decommission = |
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|long= |
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| website = |
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|extra= |
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| extra = |
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}} |
}} |
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The '''Don Pedro Dam''', since 1971 also known as the '''Old Don Pedro Dam''', was a dam across the [[Tuolumne River]] in [[Tuolumne County]], [[California]]. The structure still exists and is flooded underneath [[Don Pedro Reservoir]], which is formed by the [[New Don Pedro Dam]]. |
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==Construction== |
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[[File:Don_Pedro_Sainsevain.png|thumb|left|upright|Don Pedro Dam is named after Don [[Pedro Sainsevain]].]] |
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It was a [[Dam#Gravity dams|solid concrete gravity dam]] that was {{convert|283|ft|abbr=on}} high, {{convert|1000|ft|abbr=on}} wide, {{convert|16|ft|abbr=on}} thick at the crest, and {{convert|170|ft|abbr=on}} thick at the base. It was completed in 1923 where the Tuolumne River had carved a narrow gorge with walls of solid rock about a mile (2 km) below Don Pedro Bar. The reservoir created by this dam contained {{convert|290400|acre.ft|m3|abbr=on}} of water when full, 14.3% of today's capacity. |
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A 15 [[megawatt]] power plant was part of the dam's original design, and two more 7500 [[kilowatt]] generators were added in 1926 for 30 megawatts total, just 15% of today's capacity. The old dam still exists about {{convert|1.5|mi|abbr=on}} upstream from the new 1971 dam, and since the old dam topped out at just {{convert|580|ft|abbr=on}} above sea level it is now under some {{convert|250|ft|abbr=on}} of water when the new reservoir is full. |
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== New Don Pedro Dam == |
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The '''New Don Pedro Dam''' is an [[Dam#Rock-fill dams|earth and rock fill dam]] at {{coord|37.7008|N|120.4208|W|scale:30000_region:US}} that is {{convert|585|ft|m}} high, {{convert|2800|ft|m}} wide, and {{convert|1900|ft|m}} thick at the base. The dam contains 16,750,000 cubic yards (12,800,000 m³) of material, much of which came from gold [[dredge]] [[tailings]] in the [[Tuolumne River]] bed downstream near [[La Grange, California|La Grange]]. Construction was started in September of 1967, the dam was topped out on May 28, 1970, and the dam was dedicated on May 22, 1971. While the [[Turlock Irrigation District]] (TID) operates the [[hydroelectricity|powerhouse]] at the dam's base, the [[Modesto Irrigation District]] (MID) owns 31.54% of the plant and so is entitled to about 63 [[megawatt]]s of the 203 MW produced by the four [[Electrical generator|generator]]s. |
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==References== |
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Behind Don Pedro Dam is [[Lake Don Pedro]], also called Don Pedro Reservoir, which holds up to {{convert|2030000|acre feet}} of water, making it the 6th largest body of water in California. Water leaving the dam's powerhouse flows about 2.5 miles (4 km) downstream to the [[La Grange Dam]] where about {{convert|885000|acre feet}} of water is released into two canals. About {{convert|575000|acre feet}} goes through TID's canal to Turlock Lake and another {{convert|310000|acre feet}} goes through MID's canal to Modesto Reservoir. Nearly all of this water irrigates crops in the Turlock and Modesto Irrigation Districts. Another {{convert|230000|acre feet}} goes to San Francisco's [[Hetch Hetchy Water and Power]]. And, finally, about {{convert|780000|acre feet}} of water is delivered to the [[Tuolumne River]] channel to maintain flows in the 52 miles (84 km) of the Lower Tuolumne River through its confluence with the [[San Joaquin River]] and then into the [[Sacramento-San Joaquin Delta]]. |
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* {{cite book | author=Dwight H. Barnes | title=The Greening of Paradise Valley, The First 100 Years of the Modesto Irrigation District | chapter=Chapter 12: The First Don Pedro | chapter-url=http://www.mid.org/about/100-years/chpt_12.htm | publisher=Modesto Irrigation District | access-date=7 November 2010}} |
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*{{cite journal | author=Richard W. Amero | title=Lessons from Hetch Hetchy | url=http://www.balboaparkhistory.net/glimpses/hetchy.htm | date=June 30, 2000 | access-date=7 November 2010}} |
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* {{cite web | author=Sukhwant Virk | author2=Josh Hinkey | title=Don Pedro Dam: General Information | url=http://cee.engr.ucdavis.edu/faculty/lund/dams/Don%20Pedro/donpedro.htm#General%20Information | publisher=University of California, Davis | date=31 August 2007 | access-date=7 November 2010 | url-status=dead | archive-url=https://web.archive.org/web/20100610190548/http://cee.engr.ucdavis.edu/faculty/lund/dams/Don%20Pedro/donpedro.htm#General%20Information | archive-date=10 June 2010 }} |
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* {{cite web | author=Department of Water Resources | title=Station Meta Data: Don Pedro Reservoir (DNP) | url=http://cdec.water.ca.gov/cgi-progs/stationInfo?station_id=DNP | work=California Data Exchange Center | publisher=State of California | year=2009 | access-date=7 November 2010 | archive-date=November 16, 2010 | archive-url=https://web.archive.org/web/20101116165444/http://cdec.water.ca.gov/cgi-progs/stationInfo?station_id=DNP | url-status=dead }} |
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==External links== |
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== Old Don Pedro Dam == |
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{{Portal|California|Water|Renewable energy}} |
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[[Image:Olddonpedrodam.jpg|thumb|left|200px|The Old Don Pedro Dam]] |
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The original '''Don Pedro Dam''', since 1971 also known as the '''Old Don Pedro Dam''', was a [[Dam#Gravity dams|solid concrete gravity dam]] that was {{convert|283|ft|m}} high, {{convert|1000|ft|m}} wide, {{convert|16|ft|m}} thick at the crest, and {{convert|170|ft|m}} thick at the base. It was completed in 1923 at {{coord|37.7125|N|120.4020|W|scale:30000_region:US}} where the Tuolumne River had carved a narrow gorge with walls of solid rock about a mile (2 km) below Don Pedro Bar. The [[Lake Don Pedro|reservoir]] created by this dam contained 290,400 acre-feet (0.358 km³) of water when full, 14.3% of today's capacity. A 15 [[kilowatt]] power plant was part of the dam's original design, and two more 7500 [[watt]] generators were added in 1926 for 30 kilowatts total, just 0.015% of today's capacity. The old dam still exists about 1.5 miles (2.5 km) upstream from the new 1971 dam, and since the old dam topped out at just 580 feet (177 m) above sea level it is now under some 250 feet (76 m) of water when the new reservoir is full. |
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== References == |
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{{Reflist}} |
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== Bibliography == |
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*[http://www.tid.org Turlock Irrigation District] |
*[http://www.tid.org Turlock Irrigation District] |
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*[http://www.mid.org Modesto Irrigation District] |
*[http://www.mid.org Modesto Irrigation District] |
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*[https://web.archive.org/web/20050117090556/http://ca.water.usgs.gov/archive/waterdata/98/11287500.html USGS Hydrologic Data] |
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*[http://sfwater.org/orgDetail.cfm/MO_ID/20 SFPUC: Hetch Hetchy Water and Power] |
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*[http://ca.water.usgs.gov/archive/waterdata/98/11287500.html USGS Hydrologic Data] |
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*[http://members.cox.net/ramero/hetchy.htm "Lessons from Hetch Hetchy" by Richard W. Amero] |
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*[http://cee.engr.ucdavis.edu/faculty/lund/dams/Don%20Pedro/donpedro.htm#General%20Information UC Davis Civil Engineering Class Project] |
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== External links == |
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*[http://www.mid.org/about/100-years/chpt_12.htm The First Don Pedro] |
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[[Category:Tuolumne County, California]] |
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[[Category:Dams in California]] |
[[Category:Dams in California]] |
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[[Category:Dams on the Tuolumne River]] |
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[[Category:Former dams]] |
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[[Category:Buildings and structures in Tuolumne County, California]] |
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[[Category:Demolished buildings and structures in California]] |
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[[Category:Hydroelectric power plants in California]] |
[[Category:Hydroelectric power plants in California]] |
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[[Category:Dams completed in 1924]] |
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[[de:New-Don-Pedro-Talsperre]] |
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Latest revision as of 12:50, 8 February 2024
| Don Pedro Dam | |
|---|---|
 Old Don Pedro Dam and reservoir, circa 1925 | |
| Official name | Old Don Pedro Dam |
| Location | Tuolumne County, California |
| Coordinates | 37°42′45″N 120°24′07″W / 37.7125°N 120.4020°W |
| Opening date | 1924 |
| Dam and spillways | |
| Type of dam | Concrete thick arch/gravity |
| Impounds | Tuolumne River |
| Height | 283 ft (86 m) |
| Length | 1,000 ft (300 m) |
| Width (crest) | 16 ft (4.9 m) |
| Width (base) | 170 ft (52 m) |
| Reservoir | |
| Creates | Don Pedro Reservoir |
| Total capacity | 290,400 acre⋅ft (358,200,000 m3) |
| Power Station | |
| Turbines | 4 |
| Installed capacity | 30 MW |
The Don Pedro Dam, since 1971 also known as the Old Don Pedro Dam, was a dam across the Tuolumne River in Tuolumne County, California. The structure still exists and is flooded underneath Don Pedro Reservoir, which is formed by the New Don Pedro Dam.
Construction
[edit]
It was a solid concrete gravity dam that was 283 ft (86 m) high, 1,000 ft (300 m) wide, 16 ft (4.9 m) thick at the crest, and 170 ft (52 m) thick at the base. It was completed in 1923 where the Tuolumne River had carved a narrow gorge with walls of solid rock about a mile (2 km) below Don Pedro Bar. The reservoir created by this dam contained 290,400 acre⋅ft (358,200,000 m3) of water when full, 14.3% of today's capacity.
A 15 megawatt power plant was part of the dam's original design, and two more 7500 kilowatt generators were added in 1926 for 30 megawatts total, just 15% of today's capacity. The old dam still exists about 1.5 mi (2.4 km) upstream from the new 1971 dam, and since the old dam topped out at just 580 ft (180 m) above sea level it is now under some 250 ft (76 m) of water when the new reservoir is full.
References
[edit]- Dwight H. Barnes. "Chapter 12: The First Don Pedro". The Greening of Paradise Valley, The First 100 Years of the Modesto Irrigation District. Modesto Irrigation District. Retrieved November 7, 2010.
- Richard W. Amero (June 30, 2000). "Lessons from Hetch Hetchy". Retrieved November 7, 2010.
{{cite journal}}: Cite journal requires|journal=(help) - Sukhwant Virk; Josh Hinkey (August 31, 2007). "Don Pedro Dam: General Information". University of California, Davis. Archived from the original on June 10, 2010. Retrieved November 7, 2010.
- Department of Water Resources (2009). "Station Meta Data: Don Pedro Reservoir (DNP)". California Data Exchange Center. State of California. Archived from the original on November 16, 2010. Retrieved November 7, 2010.
