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  • Dusk at the Bill Williams River delta on Lake Havasu.
    _APK4929.tif
  • Canoeing the Colorado River in Topock Gorge on Lake Havasu.
    _APK9276.tif
  • A hot spring gushes from a wall in Black Canyon along the banks of the Colorado River.  A colorful mixture of cyanobacteria thrive on the rocks below the spring.
    _APK2791.tif
  • Grand Falls on the Little Colorado River, Arizona.
    grand falls_DSC_0108.tif
  • Early morning view of the Colorado River winding past Willow Beach in Black Canyon on Lake Mohave, Arizona/Nevada (Lake Mead National Recreation Area).
    lake mohave_10-7-06 .tif
  • A track of modular homes along the lower Colorado River near Parker, Arizona sit empty as the summer heat sets in.
    parker final _flat_cropped.tif
  • Rafting the Colorado River in the Grand Canyon.
    grand canyon raft.tif
  • Dusk at Hoover Dam on the Colorado River, Arizona/Nevada.  Hoover Dam forms the upstream terminus of Lake Mohave.  The cold water releases that flow from the dam enable nonnative rainbow trout to be stocked in the upper reaches of the reservoir.
    hoover dam_ii.tif
  • Rafts are beached at the entrance to Redwall Cavern on the Colorado River. The cave was nearly inundated with water in 1951 had a proposed dam downstream of this site had been constructed.
    grand canyon raft_064.tif
  • Kayakers congregate at Ringbolt Rapids on the Colorado River in Black Canyon (Lake Mead National Recreation Area).  One of the area's numerous natural hot springs can be found a short hike up the wash.
    _APK3114.tif
  • A lone nettle bush blooms high above the Colorado River as it cuts its way though the rocky confines of Black Canyon.
    _APK3896.tif
  • A large group of non-native common carp wait to be fed by tourists at a boat dock on Lake Mohave.  After their introduction in the 1880's, carp  quickly established in the lower Colorado River and are one of the most commonly encountered fish today.
    APK_050.tif
  • Colorado River in Grand Canyon, Arizona.
    abraham karam_grand canyon_086.tif
  • Kayakers float down the Colorado River through Black Canyon on Lake Mohave (Lake Mead National Recreation Area).
    _APK3070.tif
  • A large group of fisherman swarm around a trout stocking truck with the hopes of landing their limit of hatchery reared fish.  Every Friday throughout the year, Willow Beach National Fish Hatchery releases thousands of non-native rainbow trout into the Colorado River and the normally quiet shores of Willow Beach becomes packed with hopeful anglers.
    _APK6774.tif
  • Boyscout Canyon next to the Colorado River
    _APK9257.tif
  • Hot Spring Canyon (right in photo) emerges as a dry wash into the Colorado River within Black Canyon.  A brief hike up the wash reveals a small flowing stream which is home to Red Spotted Toads and Relict Leopard Frogs, one of the rarest species of frogs in the United States.
    _APK3732.tif
  • Though 320 feet tall, only 90 feet of Parker Dam (shown) are visible from the Colorado River bed.  The dam straddles the border between California and Arizona and creates Lake Havasu.  Half of the electricity generated by the dam's turbines is used to pump water to southern California municipalities.
    _APK4932.tif
  • It's not snow.  A Double-Crested Cormorant tends to its nest among the colony's excrement high on a cliff face above the Colorado River below Hoover Dam.
    _APK2718.tif
  • Light from the full moon illuminates a bighorn sheep skull and Black Canyon on Lake Mohave. The white bathtub ring on the rocks is a visible reminder of the regulated reality of the lower Colorado River downstream of Hoover Dam.
    lake mohave_black canyon_DSC_0286.tif
  • Lake Mohave is a narrow "run of the river" reservoir whose function is to ensure irrigation water reaches downstream reservoirs which supply the needs of farmers and cities in California and Arizona.  The reservoir also contains one of the largest and most genetically diverse populations of the endangered razorback sucker.
    lake mohave_DSC_0062.tif
  • Late afternoon along the Colorado Riverin Marble Canyon within Grand Canyon National Park.
    grand canyon raft_202.tif
  • Rolling farmlands of the upper San Juan River Basin south of Durango, Colorado.
    _APK0286.tif
  • Boaters run Crystal Rapid in Grand Canyon.
    grand_canyon_raft_327.tif
  • Black Canyon, Arizona/Nevada.
    lake mohave_DSC_0219.tif
  • Lake Mohave, Arizona/Nevada.
    DSC_0127.tif
  • Fish biologist check a trammel net for razorback sucker during bi-annual native fish surveys of Lake Mohave.
    lake mohave_DSC_0349.tif
  • Phacelia bloom on a hillside above Lake Mohave.
    lake mohave_DSC_0025.tif
  • Big Horn Canyon is one of few places in the United States where endangered Relict Leopard Frogs (right) breed.
    relict leopard frog.tif
  • Cold water released from Hoover Dam flows downstream through Black Canyon filling Lake Mohave.  Striped bass, which were incidentally introduced to Lake Mohave via the spillway tunnels of the dam during the 1980's, have been detrimental to the recovery of razorback sucker and other native fishes.
    _APK1383.tif
  • Two weeks in the bottom of Grand Canyon.
    grand_canyon_raft_482.tif
  • Biologist check trammel nets for razorback sucker during bi-annual surveys of Lake Mohave.
    DSC_0291.tif
  • Razorback sucker larvae, collected from various locations around Lake Mohave in order to retain the genetic divesity of the parental population, are reared in aquaria at Willow Beach National Fish Hatchery.  After a few months, the fish will be transfered to heated outdoor raceways where they will grow for three years before being repatriated into Lake Mohave.
    _APK3291.tif
  • A flock of American Avocets takes flight near Chalk Cliffs in Black Canyon on Lake Mohave, Arizona/Nevada.
    lake mohave_american avocets.tif
  • Rafts make their way through Marble Canyon in Grand Canyon National Park, Arizona.
    grand canyon raft_078.tif
  • Black Canyon on Lake Mohave, Arizona/Nevada (Lake Mead National Recreation Area).
    _APK3137.tif
  • Two weeks in the bottom of Grand Canyon.
    grand_canyon_raft_262.tif
  • A razorback sucker gets released into Lake Mohave after being caught during a routine monitoring survey.
    apk_lake mohave_razorback release.tif
  • Bighorn sheep in Black Canyon of Lake Mohave.
    _APK6671.tif
  • Willow Beach National Fish Hatchery produces and stocks hundreds of thousands of nonnative rainbow trout into Black Canyon in Lake Mohave, most of which are consumed by striped bass.
    lake mohave_11-27-06.tif
  • Warm water flows through the steep walls of Boyscout Canyon at Lake Mohave.
    _APK9303.tif
  • Two weeks in the bottom of Grand Canyon.
    grand_canyon_raft_422.tif
  • A gulch is filled with a torrent of muddy water following a sudden thunderstorm in Grand Canyon.
    abraham karam_bass canyon_arizona_34...tif
  • Razorback sucker larvae, collected from various locations around Lake Mohave in order to retain the genetic divesity of the parental population, are reared in aquaria at Willow Beach National Fish Hatchery.  After a few months, the fish will be transfered to heated outdoor raceways where they will grow for three years before being repatriated into Lake Mohave.
    _APK3350.tif
  • Cheops Pyramid in Grand Canyon National Park.
    abraham karam_grand canyon_125.tif
  • A kayaker paddles his boat into the upstream portion of Lake Mohave which is bound by the rugged walls of Black Canyon (Lake Mead National Recreation Area).  Numerous hot springs can be found in the area.
    lake mohave_DSC_0269.tif
  • Desert sunflowers and desert lillies bloom along the shore of Lake Mohave.
    lake mohave_DSC_0139.tif
  • A perfectly still morning on Lake Mohave.
    lake mohave_DSC_0103.tif
  • Twilight at Hoover Dam Arizona/Nevada.
    hoover dam.tif
  • A spearfisherman with displays a striped bass captured in Black Canyon on Lake Mohave, Arizona/Nevada.
    _APK6452.tif
  • A spearfisherman displays a striped bass he captured in Black Canyon at Lake Mohave.
    _APK6401_pano.tif
  • Composite of Black Canyon on Lake Mohave.
    lake mohave_black canyon.tif
  • Biologists use underwater lights to attract, then capture endangered fish larvae along the shore of Lake Mohave.
    _APK3740.tif
  • Sand dunes cover hillside above Lake Mohave at sunset.
    lake mohave_DSC_0067.tif
  • Late winter rains prompted an array of colorful wildflowers, such as these desert sunflowers, to emerge in the washes surrounding Lake Mohave during spring 2009.
    lake mohave_desert sunflowers_DSC_01...tif
  • The sun rises over the Black Mountains along the Arizona shore of Lake Mohave.
    lake mohave_mt. perkins_sunrise.tif
  • Spearfisherman with a striped bass in Black Canyon on Lake Mohave, Arizona/Nevada.
    _APK6401.tif
  • A razorback sucker gets released into Lake Mohave after being caught during a routine monitoring survey.
    DSC_0269.tif
  • Biologist check trammel nets for razorback sucker during bi-annual surveys of Lake Mohave.
    DSC_0274.tif
  • A December full moon sets behind the Nevada shore of Lake Mohave as the rising sun paints the peaks of distant mountains.
    lake mohave_APK0783.tif
  • On of few remaining wild razorback suckers captured during a population census on Lake Mohave, Arizona/Nevada.
    lake mohave_DSC_0262.tif
  • Springtime wildflower bloom on Lake Mohave, Arizona/Nevada.
    lake mohave_DSC_0205.tif
  • The Mike O'Callaghan-Pat Tillman Memorial Bridge spans Black Canyon near Hoover Dam on Lake Mohave (Lake Mead National Recreation Area).
    _APK1373.tif
  • Biologist check trammel nets for razorback sucker during bi-annual surveys of Lake Mohave.
    DSC_0295.tif
  • The southern arm of the Milky Way rises above a hill covered in creosote bushes on the shore of Lake Mohave, Arizona.
    lake mohave_APK2348.tif
  • Wildflower bloom near Cottonwood Cove on Lake Mohave during spring 2009.
    lake mohave_DSC_0277.tif
  • Daylight breaks through the clouds on a stormy November morning on Lake Mohave.
    lake mohave sunrise II.tif
  • Looking west across Cottonwood Basin, the widest portion of Lake Mohave, Arizona/Nevada.  The shoreline of the basin continues to provide wild spawned razorback sucker larvae, which supports recovery efforts of the species.
    lake mohave sunset_DSC_0375.tif
  • Two weeks in the bottom of Grand Canyon.
    grand_canyon_raft_354.tif
  • The Taylor River in west-central Colorado winds its way through a high elevation meadow before joining the East River to create the Gunnison River.
    _APK8617.tif
  • Daybreak as the Gunnison River cuts its way through Black Canyon in southwest Colorado.
    _APK9172.tif
  • Camping in the Taylor River Valley as moonlight illuminates the surrounding Rocky Mountains of west-central Colorado.
    _APK8684.tif
  • Kayaking in Topock Gorge on the Colorado River/Lake Havasu
    _APK9562.tif
  • A short hike up Boy Scout Canyon from the Colorado River downstream of Hoover Dam reveals an easily accessed hot spring-fed creek.
    _APK4225.tif
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