By Lynn Grams, Changing Seasons Coordinator
Copper River area second and third grade students enjoyed sunny days of learning just before the season changed. Wrangell Institute for Science and Environment (WISE) sponsored the fifth annual Changing Seasons science day presentations, now a tradition in the schools. On September 11, presenters went to Slana School; September 12, presenters went to Glennallen Elementary School; and September 13, presenters went to Kenny Lake School. Teachers and students eagerly look forward to this day of learning about science outside the classroom.
There were four exciting science stations for students to visit during the day. Did you know Red Squirrels weigh about the same as a granola bar? Vicki Penwell and Glenn Hart from the National Park Service conveyed unrealized details about the critters. Have you ever seen an Earth Star? Ask a second or third grader what they learned from Doug Vollman, Kenny Lake Soil and Water Conservation District and Matt Lorenz, For the Love of Gardening. What treasures in the woods can a person find when blindfolded? Janelle Eklund, WISE President and Melissa Blair, National Parks Conservation Association engaged students to describe what they felt without looking. How and why are leaves different? Paul Boos, WISE Treasurer and Heidi Veach, Cooperative Extension Service allowed students to make leaf rubbings while they pointed out different characteristics of leaves.
WISE would like to thank the above presenters, agencies and businesses for contributing to this event. Thanks also to Sandy Williams and Bev Oatman, volunteers who have been with the program every year since inception. And a big thank you for grants from Wrangell St. Elias National Park and Preserve Challenge Cost Share, Conoco Phillips, and Studebaker Environmental Education Fund.
In early August, ten high school students from the Copper River Basin rafted from Chitina to the Million Dollar Bridge on the Copper River, on a trip organized by Wrangell Institute for Science and the Environment (WISE).
The two days preceding the trip were packed with presentations from various local experts on watershed subjects: fish hatchery, local history, fish species and management, Native subsistence, conservation of the watershed, geology, pipeline safety and spill response, boating safety.
Instructors for the raft trip included Janelle Eklund of WISE, Glenn Hart of WRST, and Carla Schierholt as photographer. The trip was guided by Alaska River Expeditions.
Student participants prepared essays on their river experiences, excerpted below. The essays and more students experiences and photos will be shared at community presentations.
From the Essays
Mark Henspeter, from “The Copper River: Changing and Connecting”:
“Originating at the terminus of the Copper Glacier near the northern border of Wrangell-St. Elias National Park, the Copper River is a reasonably small river, carrying only its own load of silty water from the glacier due north, before turning south towards its ultimate destination at the delta near Cordova.
“From this point on, however, as the river picks up the burden of many well known tributaries such as the Gulkana, Tazlina, and Klutina rivers, in addition to numerous others, the Copper River becomes consistently wider, more voluminous, and ever siltier. By the time it reaches the flats along the coast, nearly 300 miles from its origin, the Copper River delta stretches nearly 50 miles side to side, and according to the Copper River Knowledge System, dumps an incredible amount of nearly 750,000 cubic feet of sediment into the Pacific Ocean every day!
“Although it sounds staggeringly huge, this figure became very believable to me once we were actually on the water, as the sound of the silt and sediments actually became an audible hiss against the bottom of the rafts.
“In all reality, the Copper River is not simply one river – it is dozens of rivers, hundreds of streams, and countless mountain drainages, all tied together to form one coursing channel to the ocean. Clearwater streams abounding with fish wind their way into the Copper, as well as alpine glaciers, depositing their fresh loads of silt into the murky ice-cold waters of the river. With each additional tributary into the Copper, the character of the river changes yet again – in temperature, color, capacity, or contents – with each leaving their own unique mark upon the river.”
Mary Marshall, from “Lake Atna”:
“Lake Ahtna covered approximately 2,000 square miles of lake bottom floor about 30,000 to 10,000 years ago. It covered what is now known as the Copper Basin including Glennallen, Kenny Lake, Tazlina, Gulkana, Copper Center, Gakona and more. In fact, some scientists say it was larger than Delaware. It also was in the center of many incredible icefields. At the last ice age, it created a huge dam for Lake Ahtna to rest in. When the glaciers receded, it made room for what is now known as the Copper River to flow through. Those glaciers are now called Allen, Miles and Childs glaciers which are located near the “Million Dollar” bridge.”
John Giraldo, from “Glacier Power”:
“The topography of the Copper River was further changed when Alaska entered the mini ice age, which lasted from 1650 to the beginning of the 1900's. This mini ice age caused what glaciers remained to advance, changing the landscape of the Basin, particularly in the lower Copper River region. One of the most notable feature caused by this ice age that we were able to observe on our raft trip was the Bremner sand dunes. While we were not able to see the top half of these dunes due to high winds which made a huge cloud of silt, we were able to see the bottom half the next day when the wind had subsided. They stretched on for miles. It was amazing to see the amount of debris that these glaciers were capable of moving.
“Now, 9,000 years after the lake drained, the glaciers have continued receding, making the channel between the two glaciers, which at one time was a formidable rapid, into a four mile wide lake called Miles Lake. Miles Glacier is receding at a rapid pace, while Childs seems to be able to maintain its size fairly well. However, like all other glaciers, these glaciers calve frequently, making enormous waves as they crash into the water.
“Both glaciers stand approximately 300 feet tall, making the splash of the falling ice even more dramatic. I was able to observe both glaciers calve, but Childs glacier was definitely a better show.
“While both glaciers calve off enormous chunks of ice (some are city block sized!) Miles Glacier was over a mile away from where we camped, so most of the energy of the wave was depleted by the time it hit the shore. However, we were only a river’s width away from the Child’s Glacier, so when huge chunks of ice fell off it was spectacular. While we didn’t actually observe it happen, sometimes the waves. . . are so huge that they beach fish, making it easy for bears to eat the salmon.”
On the experience as a whole: “It is a privilege to be able to experience Alaska in this way.”
Wade Jones, from “Traversing the Copper River”:
“On the back side of Woods Canyon, the currents separate in the three to five different currents. At this point on the trip this was the first point I was able to row. This day the guide was telling me which current to go to at what time I needed to get over there. But by the third day I was able to see which currents were faster and I could anticipate when I needed to move the raft.
“Day three was slow and was a nice leisurely drift down river. Day four was by far the most interesting. Going through Baird Canyon, the rapids are not that fast or hard to maneuver through.
“The next part of the river called Abercrombie Rapids was probably the best part of the river. In the canyon the water formed one current that was fast but still slower than Woods Canyon. Then through the rapids the water is forced through a narrow alley way and drops elevation very quickly and creates some very tall swells. This section of the river was fun for us because we were with experienced guides and traveling downriver.”
On the experience as a whole: “The experience of learning and being able to raft the river was one of the best things that I have done with my life so far.”
Kimberly Woods, from “Human Uses of the Copper River Past and Present”:
“On March 20, 1885, Lt. Allen and his crew of two, Sergeant Cady Robertson and Private Fred Picket left Nuchek or Hinchinbrook Island, which is now the trading station of the Alaska Commercial Company, for the mouth of the Copper River. They had two boats and guns; they packed lightly and off they went up river. The Allen Expedition’s main purpose was to map the Copper River, find resources, and meet natives.
“Along the way, Lt. Allen met natives and traded with them for food, supplies, and information. Many Ahtna villages treated them as guests. Allen and his crew hunted with the natives. Allen’s maps were amazingly accurate and guided future miners and trappers through the Copper Basin.
“Lt. Allen observed how the natives caught fish using dip nets and fish traps. As years have gone by, dip nets and fish traps are still used, and starting in the early 1900’s, fish wheels appeared in the Copper River.”
Mary Anne Carlson, from “Shaping the Landscape”:
“The first day traveling on the river I was astonished at how strong the currents were. As we left the land near the Chitna bridge, we had not gone far before we met up with the Chitina River. It flowed directly along side the Copper River which created bigger ripples in the water. The raft I was in instantly adapted to the two different currents and we floated at a faster pace towards our destination. Throughout the five days on the river I experienced many currents, volume changes, and different depths of water.
“The volume of the water appeared to be smaller toward the beginning of the trip. However as we floated day after day I realized how much the volume of the water increased further along the river. One reason for this volume change is the many other rivers that flow into the Copper River, making it bigger in volume size. At one point on our trip the river was approximately six miles apart from bank to bank.
“The depth of the water changed throughout the trip as well. There are many things that affect the depths of the river. For example glacier bound lakes, snow and glacier melts, rainfall, and water discharge will all increase the depth of the water. However, there are also many things that restrict the water elevation on parts of the rivers: the large sand dunes and eroded banks. These have an instant affect on the depth of the Raging Copper River.”
On the experience as a whole: “The scenery, watching the wildlife interact with the river, and the quiet time of listening that I had every day was unforgettable and life-changing.”
Michael Helkenn, on “The Wilderness of the Copper River Watershed”:
“Huge mountains, some snow-capped, all covered in thick vegetation, flanked the banks of the Copper River as the raft expedition passed slowly through this unique wilderness. Bears patrolled the shores, searching for a tasty salmon meal. Bald eagles flew overhead, also preying on the salmon swimming up the river to spawn. . .
“The largest and most noticeable aspect of the trip were the mountains. Alaska is covered in large mountains and boasts the tallest peak in North America. Everybody here in the Copper River basin are familiar with the Wrangell and Chugach mountains, as those two ranges surround us in our basin. However, those two ranges are many miles apart.
“On the river, less than ten miles from Chitina, we were able to see the full magnificence of Alaska's mountains, as the river literally passed right through them. Steep peaks climbed to heights of over 8000 feet on both sides of the river. These mountains, and everything else for that matter, was covered in thick, dense alder forests. Floating through this Alaskan jungle, I felt like I was in the middle of a tropical rain forest.”
On the experience as a whole: “Every place in Alaska is different from all the others.”
Naomi Grace Carlson, from “Glacier Winds of the Copper River”:
“Our guides on our trip to Cordova would always have us wake up early to get out on the river. This allowed our group to get off the river before most of the winds would hit us. The winds would really start to pick up right around noon time. It was a lot harder to row when you face the fierce winds with the resulting stinging sand and silt. Lucky for our group we only had to experience that one time through our five day trip. But trust me; you do not want to be stranded on the river with those Katabatic winds.
“The nice thing about the wind was it was something you really could plan ahead for. Since you knew the Katabatic winds were bound to come, you knew to make sure you had extra clothes to put on and to get off the river early.
“Throughout the day there was a complete weather and wind change on the Copper River. The hanging glaciers all through the Copper River affect the climate tremendously.
“The mornings had a nice cool breeze but as the day went along the winds became stronger and stronger, changing the current, the scenery, weather, and not to mention clothing. As the sun went down every night the wind seemed to enjoy bedding down for the evening as well. The reason for this was because the cooler cold front glacier winds did not have the heat of the sun to create the turbulence. “
On the experience as a whole: “I got to know and share this wonderful experience with many friends and had plenty of laughs along the way.”
Sami Knutson, from “Million Dollar Bridge”:
“. . .there were workers who made the bridge and worked through the hurricane winds and glaciers closing in on them. The first piling the workers made along with the rest of them were hollow. They were dug so deep into the Copper River that sometimes when the workers came up, oxygen bubbles would get into their blood streams sometimes causing them to die.
“Through long grueling months of work all of the four pilings were finished. The work on the “bridge” had to be done. Through all this time of building the Childs glacier was moving closer and closer to the bridge. After one span had been done the glacier crashed into it and caused the span to fall. This made it so that they had to rebuild the whole section again. To be able to reach the other piling one had to cross the catwalk, sometimes in winds as strong as hurricanes. After one crossing a man swore that he would never cross it again. Then, after four years of grueling work and unlivable conditions, the bridge was completed making way for copper from the Kennecott mines.”
Alex Van Wyhe, from “Learning From the River”:
“Over the course of the five days that I spent on the Copper River, I learned about many things--ranging from the history of the area to the nitrogen fixers that allow plants to grow along river banks. Every day we saw evidence of people having been on or along the banks of the river. Whether they were there dip netting days before or building a railroad nearly one hundred years ago, we could tell that they’d been there.
“One piece of information that I found most interesting explained how all of the sediment came to be in the Copper River. About 70,000 years ago Lake Atna (now spelled Ahtna) was formed when glaciers descended upon the Copper River Basin, absolutely blocking off the drainage of the Copper River. This glaciation occurred during the Wisconsinan Ice Age. Lake Atna was around for some 60,000, years and during this time all of the sediment from the glaciers that were blocking drainage was able to settle to the lake bottom. This sediment deposit is what brought all of the sand found in and around the Copper River. When this huge sediment load is coupled with the winds that howl along the river, it’s easy to see why people are so happy to take a shower after floating the Copper.
“Another thing I thought was interesting was how you can imagine what the river was doing at different points in time just by looking at the bluffs along the river. When you look at all the layers that make up those bluffs, it forces you to wonder what was going on in the past that made the bluffs look like that.
“At certain points there is sand on top of gravel on top of sand on top of gravel…. While floating past one such bluff, our guide, Robin Irving, shared with me how those layers came to be. Approximately 400 years ago a sort of “mini ice age” occurred. During this period of time the glaciers stopped the flow of the Copper River in the winter, letting the sediment load deposit, then during the summer, the glaciers would open up again allowing the water to flow.
“That explains why the layers alternate between sand and rocks. The sand represents the time that the water wasn’t moving because the sediment had time to settle out, and the rock represents the time when the water was moving because the force of the river would have deposited those large pieces while it carried the sand elsewhere.”
On the experience as a whole: “I would take this trip again in a heartbeat.”
Who We Are
WISEfriends are several writers connected with Wrangell Institute for Science and Environment, a nonprofit organization located in Alaska's Copper River Valley. Most of these articles originally appeared in our local newspaper, the Copper River Record.