Images

Warren "Buz" Brown making second-order measurements using a Kern theodolite. The blind is to prevent temperature variations from affecting the instrument.

U.S. Geological Survey streamflow-gaging station 08116650 Brazos River near Rosharon, Texas, looking upstream from Farm-to-Market Road (FM) 1462 bridge, August 28, 1973.
USGS SIR 2009–5174

The May 1973 eruption near Hiʻiaka Crater was a vigorous event on Kīlauea’s upper East Rift Zone. Lasting about seven hours, it produced lava flows that traveled from just west of Hiʻiaka to Pauahi Crater, crossing what is now Chain of Craters Road in Hawaiʻi Volcanoes National Park.

U.S. Geological Survey streamflow-gaging station 08109000 Brazos River near Bryan, Texas, looking upstream from left bank, March 10, 1971.

USGS SIR 2009–5174

USGS topographer Don Winstead working with a level in Hawaii.

USGS topographer Russ Curtis using a Wild N3 level.

Lava falls pour into 'Alae Crater at 11 p.m., HST, on August 5, 1969, supplied by a high lava fountain at Mauna Ulu, 600 m (2,000 feet) away. The falls, more than 100 m (330 ft) high and 300 m (1,000 ft) wide, had nearly filled the crater by the time the fountains stopped at 5:45 a.m., August 6.

The February 1969 rift eruption near Nāpau Crater was a brief but dynamic precursor to the long-lived Maunaulu eruption that began in May of that year. This week-long event featured lava fountaining from multiple fissures along a 2.5-mile stretch of Kīlauea’s upper East Rift Zone.

Blasting craters for a new section of the Cinder Lakes outside Flagstaff, Ariz.(July 1968). USGS Astrogeology constructed a mockup of a section of the moon's Sea of Tranquillity in a cinder field to aid with training and time-and-motion studies.

Yutaka Hamamoto working on a Wild A-7 Stereoplanigraph.

Repeat oblique photographs of Gulkana glaciers in Alaska.  1967, Unknown USGS photographer. 2016, L. Sass, USGS.

U.S. Geological Survey streamflow-gaging station 08116650 Brazos River near Rosharon, Texas, (A) looking upstream from right bank, April 2, 1967 (not known if pilings visible at base of bridge pier are result of channel-bed incision).
USGS SIR 2009–5174

Repeat oblique photographs of Wolverine glacier in Alaska.  1966 image by unknown USGS photographer; 2015 image by L. Sass, USGS.

Topographer Jim Tennant making measurements with a Wild T-2 theodolite on Mount Trumball in Arizona.

Calvin Hazlewood works with a 48-inch Robertson copy camera.

Working with a small copy camera.

Jay Prendergast adjusts the lens on a Robertson 48-inch, 4.5 ton camera. Installed in 1959, the camera was used for precise scale transformation of mapping separates and composites.

Riparian vegetation has increased to the extent of blocking the downstream view. The channel appears to have shifted to the right, and the terrace is now occupied by cottonwood, black willow, and tamarisk. (Raymond M. Turner).

U.S. Geological Survey streamflow-gaging station 08098290 Brazos River near Highbank, Texas, looking downstream from FM 413 bridge, March 31, 1964.

SIR 2009–5174

U.S. Geological Survey streamflow-gaging station 08098290 Brazos River near Highbank, Texas, looking upstream from FM 413 bridge, March 31, 1964.

SIR 2009–5174

Although large streamgage structures are no longer necessary, the USGS still uses some of them to contain modern streamgage equipment.