The Enchanted Valley Chalet
Photo by Will Baker, see more of his work at http://willbaker.zenfolio.com/
The Enchanted
Valley is a hidden Shangri-la lying in the deep, wilderness heart of Olympic
National Park. Nestled in the verdant meadows of this valley is a nearly 100
year old Chalet that has been a shelter for rain-pelted hikers, and a base for
mountain rescue missions. But this historic shelter is threatened by the
flooding of the Quinault River and is on the verge of being lost forever.
But how did the
Chalet, after standing untouched for a century, come to be at risk? When the Chalet
was built in 1930, the river followed a well-defined course 500 feet away, and
had (as recent studies have shown) followed that course for hundreds of years.
Why is the river now carving a wide gravel flood plain out of long established
meadows? The fault, at least in part, lies at the feet of humans.
Retreat of the Anderson Glacier |
A further factor
in the erosion of the meadows is tied to the extinction of wolves in the
Olympic range. When wolves were systematically exterminated in the early 1900s,
the population of herbivores such as elk and deer, whose numbers had been kept
in check by large predators, exploded. Overgrazing by large numbers of herbivores
has severely inhibited the growth of stream side vegetation. Without this vegetation,
the river more easily carries away soil previously held in place by roots.
Thus, the river has eroded its banks and formed the braided channels that
threaten the chalet and destroy the meadows.
Another example of how humans have impacted the valley and its meadows indirectly was the eradication of beavers in the Olympic Mountains by trappers in the early 20th century. Beavers build dams that create catch basins for water during times of high flow. Many tiers of Beaver dams can also slow the flow of water, thereby lessening erosion. Further effects of Beaver dams include increased riparian plant growth, and the filtering of sediment through the dams. This decreases the buildup of channel altering debris along undammed portions of the river. Without the beavers and their dams, floods are more violent, erosion is worsened by faster flowing water, and sediment buildup in the floodplain causes the channel to be diverted frequently.
Another example of how humans have impacted the valley and its meadows indirectly was the eradication of beavers in the Olympic Mountains by trappers in the early 20th century. Beavers build dams that create catch basins for water during times of high flow. Many tiers of Beaver dams can also slow the flow of water, thereby lessening erosion. Further effects of Beaver dams include increased riparian plant growth, and the filtering of sediment through the dams. This decreases the buildup of channel altering debris along undammed portions of the river. Without the beavers and their dams, floods are more violent, erosion is worsened by faster flowing water, and sediment buildup in the floodplain causes the channel to be diverted frequently.
So what can be
done to save the Chalet? The obvious solution is to move it. Plans were made
for this eventuality in 2007 when the river began to move towards the Chalet.
However, the park service was able to divert the river back into its original
course by moving fallen trees in the river to strategically channel the
current. This lasted for several years, but recently the river has again moved
toward the Chalet and is now only a scant few feet from the building. The park
service is monitoring the situation via weekly fly overs and is assessing their
options which are inhibited by the unpredictable nature of the river and the
strict regulations of the Wilderness Act.
It would appear
that humans are indirectly the source of many ecological problems in the
Olympic Mountains, and it should be our duty to try to repair the damage we
have done. In a way, the Enchanted Valley chalet has become part of the
ecosystem, and is an indicator of the health of that system. If we cannot stop
the melting of the glacier or return the predators to the food web, then we must
find other solutions to save this historic structure and the meadows that
should be surrounding it, or it will all be lost forever.
Enchanted Valley 1990-2013,
photos captured in Google Earth
(click to enlarge)
1990 |
2006 |
2009 |
2011 |
2013 |
Aerial photo of the Chalet- January 2014
Sources:
http://en.wikipedia.org/wiki/Climate_change_in_Washington |