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Image of Lake Tahoe Hydro Mapper Page
Lake Tahoe Hydro Mapper
Lake Tahoe Hydro Mapper
Lake Tahoe Hydro Mapper

Lake Tahoe is a beautiful Alpine Lake in the Sierra Nevada. Known for its deep, clear water, Lake Tahoe is the second deepest lake in the United States, with a maximum depth of 1,645 feet. The average depth of Lake Tahoe is 1,000 feet.

Lake Tahoe is a beautiful Alpine Lake in the Sierra Nevada. Known for its deep, clear water, Lake Tahoe is the second deepest lake in the United States, with a maximum depth of 1,645 feet. The average depth of Lake Tahoe is 1,000 feet.

East Fork Carson River below Markleeville Creek near Markleeville, CA
East Fork Carson River below Markleeville Creek near Markleeville, CA
East Fork Carson River below Markleeville Creek near Markleeville, CA
East Fork Carson River below Markleeville Creek near Markleeville, CA

Early spring at monitoring location USGS 10308200 East Fork Carson River below Markleeville Creek near Markleeville, CA.

Early spring at monitoring location USGS 10308200 East Fork Carson River below Markleeville Creek near Markleeville, CA.

Graph showing population growth in Douglas County, NV between 1969 and 2020
Population growth in Douglas County, NV between 1969 and 2020
Population growth in Douglas County, NV between 1969 and 2020
Population growth in Douglas County, NV between 1969 and 2020

Graph showing population growth in Douglas County, NV between 1969 and 2020. Data sourced from Nevada Economic Analysis Project compiled by the Regional Income and Product Divisions of the Bureau of Economic Analysis, U.S. Department of Commerce (11-16-2021).

Graph showing population growth in Douglas County, NV between 1969 and 2020. Data sourced from Nevada Economic Analysis Project compiled by the Regional Income and Product Divisions of the Bureau of Economic Analysis, U.S. Department of Commerce (11-16-2021).

Graph of historic pumping over time in Carson Valley, NV
Historic pumping over time Carson Valley, NV
Historic pumping over time Carson Valley, NV
Historic pumping over time Carson Valley, NV

The graph shows historic pumping over time in Carson Valley, NV. Between the 1970s and early 2000’s, Carson Valley underwent rapid population growth and total pumping increased by an order of magnitude, from 3,360 acre-feet in 1970 to 31,100 in 2004.

The graph shows historic pumping over time in Carson Valley, NV. Between the 1970s and early 2000’s, Carson Valley underwent rapid population growth and total pumping increased by an order of magnitude, from 3,360 acre-feet in 1970 to 31,100 in 2004.

USGS hydrologist sampling at Trout Creek near Tahoe Valley, CA
USGS hydrologist sampling at Trout Creek near Tahoe Valley, CA
USGS hydrologist sampling at Trout Creek near Tahoe Valley, CA
USGS hydrologist sampling at Trout Creek near Tahoe Valley, CA

Photo of USGS hydrologist collecting a sediment sample at Trout Creek near Tahoe Valley, CA

Photo of USGS hydrologist collecting a sediment sample at Trout Creek near Tahoe Valley, CA

DH-81 sampler at Trout Creek near Tahoe Valley, CA
DH-81 sampler at Trout Creek near Tahoe Valley, CA
DH-81 sampler at Trout Creek near Tahoe Valley, CA
DH-81 sampler at Trout Creek near Tahoe Valley, CA

Photo of sample taken using DH-81 sampler at Trout Creek near Tahoe Valley, CA

Photo of sample taken using DH-81 sampler at Trout Creek near Tahoe Valley, CA

Water year 2021 streamflow summary for the Upper Truckee River at South Lake Tahoe, USGS Site 10336610.
Water year 2021 streamflow summary for the Upper Truckee River at South Lake Tahoe, USGS Site 10336610.
Water year 2021 streamflow summary for the Upper Truckee River at South Lake Tahoe, USGS Site 10336610.
Water year 2021 streamflow summary for the Upper Truckee River at South Lake Tahoe, USGS Site 10336610.

Water year 2020 streamflow summary for the Upper Truckee River at South Lake Tahoe, USGS Site 10336610.

Third Creek, NV
Third Creek, NV
Third Creek, NV
Third Creek, NV

View of near shore Third Creek, NV

View of near shore Third Creek, NV

Photo of groundwater well housing, a small metal structure with an antenna on top. Site is arid and surrounded by small bushes.
USGS Nevada Groundwater Site 393310114475001
USGS Nevada Groundwater Site 393310114475001
USGS Nevada Groundwater Site 393310114475001

Did you know the USGS has been studying groundwater since we were founded? USGS first measured the groundwater level at the well in this photo in 1918, over one hundred years ago! How often water levels are measured at a site in the USGS groundwater monitoring networks varies, depending on the scientific purpose of the measurement.

Did you know the USGS has been studying groundwater since we were founded? USGS first measured the groundwater level at the well in this photo in 1918, over one hundred years ago! How often water levels are measured at a site in the USGS groundwater monitoring networks varies, depending on the scientific purpose of the measurement.

Photo of groundwater well housing, a small metal structure with an antenna on top. Site is arid and surrounded by small bushes.
USGS Nevada Groundwater Site 393310114475001
USGS Nevada Groundwater Site 393310114475001
USGS Nevada Groundwater Site 393310114475001

Did you know the USGS has been studying groundwater since we were founded? USGS first measured the groundwater level at the well in this photo in 1918, over one hundred years ago! How often water levels are measured at a site in the USGS groundwater monitoring networks varies, depending on the scientific purpose of the measurement.

Did you know the USGS has been studying groundwater since we were founded? USGS first measured the groundwater level at the well in this photo in 1918, over one hundred years ago! How often water levels are measured at a site in the USGS groundwater monitoring networks varies, depending on the scientific purpose of the measurement.

Carson River below Lahontan Reservoir near Fallon, NV
Carson River below Lahontan Reservoir near Fallon, NV
Carson River below Lahontan Reservoir near Fallon, NV
Carson River below Lahontan Reservoir near Fallon, NV

View looking downstream of Lahontan Reservoir. Monitoring location USGS 10312150 Carson River below Lahontan Reservoir near Fallon, NV measures streamflow releases from Lahontan Dam.

View looking downstream of Lahontan Reservoir. Monitoring location USGS 10312150 Carson River below Lahontan Reservoir near Fallon, NV measures streamflow releases from Lahontan Dam.

Wild horses in the Virginia City Highlands, Nev.
Wild horses in the Virginia City Highlands, Nev.
Wild horses in the Virginia City Highlands, Nev.
Wild horses in the Virginia City Highlands, Nev.

Wild horses in the Virginia City Highlands, Nev. 

Woman standing in middle of stream next to instruments
Measuring streamflow in northern Nevada.
Measuring streamflow in northern Nevada.
Measuring streamflow in northern Nevada.

USGS technician measuring streamflow in northern Nevada.

Gray metal box standing next to a river with a sign in green and black writing
USGS Streamgaging Station in northern Nevada.
USGS Streamgaging Station in northern Nevada.
Well pumping as part of an aquifer test in Lovelock Valley, Nevada
Well pumping as part of an aquifer test in Lovelock Valley, Nevada
Well pumping as part of an aquifer test in Lovelock Valley, Nevada
Well pumping as part of an aquifer test in Lovelock Valley, Nevada

Well pumping as part of an aquifer test in Lovelock Valley, Nevada. 

flooding along the Carson River near Carson City, NV
Carson River Next to Morgan Mill Rd
Carson River Next to Morgan Mill Rd
Carson River Next to Morgan Mill Rd

Flood water on Carson River near Nevada Water Science Center Office.

Flood water on Carson River near Nevada Water Science Center Office.

Large ruler-like instrument under a bridge standing up in the river water
USGS staff gage measuring the height of the water in the Carson River
USGS staff gage measuring the height of the water in the Carson River
USGS staff gage measuring the height of the water in the Carson River

USGS staff gage (ruler) measuring the height of the water, on the Carson River, near Brunswick Canyon, Nevada.

person sitting on the shore, watch a floating instrument tied to a cableway over a river
Streamgaging on Martin Creek in Nevada
Streamgaging on Martin Creek in Nevada
Streamgaging on Martin Creek in Nevada

Streamgaging on Martin Creek, near Paradise Valley, Nevada.

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