1991 River Trip

1991 River Trip Collections

In November and December 1991, 21 aquatic sampling sites were surveyed; these included six sites on the main stem of the Colorado River (including backwater bays); Warm Springs / Lava Well and two unnamed backwater marsh areas that drain into the Colorado River; and 12 direct tributary streams of the Colorado River (Vasey’s Paradise, Saddle Canyon Creek, Little Colorado River, Lava [Chuar] Canyon Creek, Bright Angel Creek, Deer Creek, Matkatamiba Canyon Creek, an unnamed spring/seep/creek at the “Ledges”, National Canyon Creek, Spring Canyon Creek, Granite Park Canyon spring/seep, and Diamond Creek. Aquatic oligochaetes were collected from 17 of these 21 sites.

1991 sites located in Coconino County

  • Colorado River (RM 0.0), at Lees Ferry, north side of river, in small inlet, ~50m upstream boat landing area, in Grand Canyon National Park. G&SRM: Township 40 North, Range 8 East, SW/4, NW/4, NW/4, SW/4, Section 18. U.T.M. Zone 12: 447910m East, 4079950, North. Elevation: 3,107ft. Lees Ferry, Arizona (1985 prov. ed.) USGS tqm. 20 November 1991. Collectors: M.J. Wetzel (#1991-70) (INHS), J. Macauley (NAU).
  • Colorado River (RM 0.0), at Lees Ferry, several areas near the project’s transects T2 and T4 in the immediate vicinity of the gauging station cable, just downstream of the boat launching / parking lot areas, in Grand Canyon National Park. G&SRM: Township 40 North, Range 7 East, SE/4, NE/4, NE/4, SE/4, Section 13. U.T.M. Zone 12: 447640m East, 4079900m North. Elevation: 3,107ft. Lees Ferry, Arizona (1985 prov. ed.) USGS tqm. 20 November 1991. Collectors: M.J. Wetzel (#1991-71) (INHS), J. Macauley (NAU).
  • Colorado River (RM 0.0), on north side of river, just downstream Lees Ferry boat landing area, 10m downstream gauging station cable, in Grand Canyon National Park. G&SRM: Township 40 North, Range 8 East, SW/4, NE/4, NE/4, SE/4, Section 13. U.T.M. Zone 12: 447605m East, 4079895m North. Elevation: 3,107ft. Lees Ferry, Arizona (1985 prov. ed.) USGS tqm. 20 November 1991. Collectors: M.J. Wetzel (#1991-72) (INHS), J. Macauley (NAU).
  • Colorado River (RM 31.5R), in small inlet (r.b.f.d.), near “confluence” of South Canyon Creek [when flowng], 100m upstream South Canyon Rapids, in Grand Canyon National Park. U.T.M. Zone 12: 423320m East, 4039980m North. Elevation: 2,875’ft. North Canyon Point, Arizona (1985 prov. ed.) USGS tqm. 21 November 1991. Collectors: M.J. Wetzel (#1991-73) (INHS), Alla Sineeva (Russia).
  • Vasey’s Paradise (hanging spring/waterfall/cascade), on rock face near lower part waterfall/cascade, and in pool at base of cascade, just up (in elevation) from its confluence with the Colorado River (RM 31.8), in Grand Canyon National Park. U.T.M. Zone 12: 423270m East, 4039320m North. Elevation: 2,880ft. Tatahatso Point, Arizona (1988 prov. ed.) USGS tqm. 21 November 1991. Collectors: M.J. Wetzel (#1991-74) (INHS), J. Macauley, T. Martin (NAU).
  • Small water pot, in boulder, at river’s edge, Colorado River (RM 43.2R), 0.6 mi upstream President Harding Rapids, just east of Anasazi Foot Bridge, N of Point Hansbrough, in Grand Canyon National Park. U.T.M. Zone 12: 423340m East, 4028070m North. Elevation: 2,835ft. Tatahatso Point, Arizona (1988 prov. ed.) USGS tqm. 21 November 1991. Collectors: M.J. Wetzel (#1991-75) (INHS), Michael Shaver (NAU).
  • Saddle Canyon Creek, in pools and riffles below small (10′) spillway/falls, near spring, approx. 1.8km upstream (SW) confluence with Colorado River (RM 47R), in Marble Canyon of Grand Canyon National Park. U.T.M. Zone 12: 418850m East, 4024040m North. Elevation: 3,590ft. Point Imperial, Arizona (1988 prov. ed.) USGS tqm. 22 November 1991. Collector: M.J. Wetzel (#1991-76) (INHS).
  • Colorado River (RM 52.7), in Nankoweap Bay (rbfd), just downstream Nankoweap rapids (second set), in Grand Canyon National Park. U.T.M. Zone 12: 423160m East, 4017380m North. Elevation: 2,785ft. Nankoweap Mesa, Arizona (1988 prov. ed.) USGS tqm. 22 November 1991. Collectors: M.J. Wetzel (#1991-77) (INHS), Tom Martin et al. (NAU).
  • Backwater marsh, draining into north side of Nankoweap Bay of Colorado River (RM 52.7), just west of the lower set of Nankoweap Rapids; in Grand Canyon National Park. U.T.M. Zone 12: 423080m East, 4017430m North. Elevation: 2,887ft. Nankoweap Mesa, Arizona (1988 prov. ed.) USGS tqm. 22 November 1991. Collector: M.J. Wetzel (#1991-78) (INHS).
  • Little Colorado River (upstream ‘arm’, at island split before confluence), on north side (r.b.f.d.) of river (LCR), 200m upstream confluence with main channel Colorado River (RM 61.4), in Grand Canyon National Park. U.T.M. Zone 12: 428400m East, 4005380m North. Elevation: 2,710ft. Cape Solitude, Arizona (1988 prov. ed.) USGS tqm. 23 November 1991. Colectors: M.J. Wetzel (#1991-79) (INHS); with Jeanette Macauley, Michael Shaver (NAU), and Candace Stewart, Jim Thomas (volunteers).
  • Colorado River (RM 61.4), on upstream side (north edge) of cobble island located in the middle of the main channel of the river at confluence point with the Little Colorado River, in Grand Canyon National Park. U.T.M. Zone 12: 428040m East, 4005500m North. Elevation: 2,710ft. Cape Solitude, Arizona (1988 prov. ed.) USGS tqm. 23 November 1991. Collector: M.J. Wetzel (#1991-80) (INHS).
  • Lava [Chuar] Creek, 100m upstream confluence with Colorado River (RM 65.5R), at Lava Canyon Rapids, in Grand Canyon National Park. U.T.M. Zone 12: 426460m East, 3999480m North. Elevation: 2,690ft. Cape Solitude, Arizona (1988 prov. ed.) USGS tqm. 23 November 1991. Collectors: M.J. Wetzel (#1991-81) (INHS), Joe Shannon, Dennis Silva, Mary Moran (NAU).
  • Bright Angel Creek, 0.25 mi (0.4km) S Phantom Ranch, 5m downstream campground footbridge; upstream confluence with Colorado River (RM 87.8R), in Grand Canyon National Park. U.T.M. Zone 12: 401425m East, 3995690m North. Elevation: 2,435ft. Phantom Ranch, Arizona (1988 prov. ed.) USGS tqm. 25 November 1991. Collector: M.J. Wetzel (#1991-82) (INHS).
  • Deer Creek, from pools and riffles 20m downstream of Deer Creek Falls, just upstream of its confluence with Colorado River (RM 136.1R), in Granite Narrows, Grand Canyon National Park. U.T.M. Zone 12: 364770m East, 4027950m North. Elevation: 1,940ft. Fishtail Mesa, Arizona (1988 prov. ed.) USGS tqm. 27 November 1991. Collector: M.J. Wetzel (#1991-83) (INHS).
  • Matkatamiba Canyon Creek, 100m upstream confluence w/ Colorado River (RM 147.9L), in Grand Canyon National Park. U.T.M. Zone 12: 350020m East, 4023110m North. Elevation: 1,840ft. Havasu Falls, Arizona (1988 prov. ed.) USGS tqm. 28 November 1991. Collector: M.J. Wetzel (#1991-84) (INHS).
  • National Canyon Creek, 1.6 km upstream (ESE) “confluence” with Colorado River (RM 166.4L) [stream was intermittent/hyporheic], on Hualapai Indian Reservation, adjacent to Grand Canyon National Park. U.T.M. Zone 12: 331500m East, 4013560m North. Elevation: 1,900ft. Fern Glen Canyon, (1988 prov. ed.) USGS tqm. 29 November 1991. Collector: M. J. Wetzel (#1991-86).
  • Lava Well / Warm Springs, in pool along bluff of Colorado River (RM 179.4L), 150m SE Lava Falls Rapid, on Hualapai Indian Reservation, adjacent to Grand Canyon National Park. U.T.M. Zone 12: 312880m East, 4007520 m North. Elevation: 1,665ft. Vulcans Throne, Arizona (1967 ed.) USGS tqm. 29 November 1991. Collectors: M. J. Wetzel (#1991-87) (INHS), Michael Shaver (NAU).
  • Granite Park Canyon spring/seep (Granite Park Canyon Creek), 0.9 km upstream “confluence” with Colorado River (RM 208.8L), in Grand Canyon National Park. U.T.M. Zone 12: 291720 m East, 3982230m North. Elevation: 1,575ft. Granite Park, Arizona (1967 ed.) USGS tqm. 1 December 1991. M.J. Wetzel (#1991-89) (INHS), Michael Shaver (NAU).

1991 sites located in Mohave County

  • Spring / seep / creek, at “the Ledges”, Colorado River (RM 151.6R); collections taken from pools and on slab rocks located above (in elevation) the river, in Grand Canyon National Park. U.T.M. Zone 12: 345180m East, 4023460m North. Elevation: 1,845ft. Havasu Falls, Arizona (1988 prov. ed.) USGS tqm. 29 November 1991. Collector: M.J. Wetzel (#1991-85) (INHS).
  • Spring Canyon Creek, 0.4 km upstream “confluence” with Colorado River (RM 204.4R), in Grand Canyon National Park. U.T.M. Zone 12: 287850m East, 3988340m North. Elevation: 1,510ft. Whitmore Point SE, Arizona (1967 ed.) USGS tqm. 30 November 1991. Collector: M.J. Wetzel (#1991-88) (INHS).
  • Diamond Creek, 30m upstream confluence with Colorado River (RM 225.7L), just S of boat landing area, in Lower Granite Gorge, Lake Mead National Recreation Area, in Grand Canyon National Park. U.T.M. Zone 12: 285540m East, 3960310m North. Elevation: 1,345ft. Diamond Peak, (1967 ed.) USGS tqm. 3 December 1991. Collector: M.J. Wetzel (#1991-90) (INHS).

    [page updated 26nov2021; mjw]

Back to the home page for Aquatic Annelida of Grand Canyon National Park