The Construction of the Lewis
Center's Mohave tui chub Refuge
Pond and Tui Slough
When the initial
buildings of the Lewis
Center's Mojave River Campus was constructed (1999-2000), the site
plan included the construction of a south to north running drainage
basin on the west side of the campus to intercept all campus runoff.
This depression is designed to keep campus runoff from flowing into the
marsh and river proper. This drainage
basin included a concrete
dam on northwest side.
2002-2003 school year, the 7th grade life science and ornithology instructor,
Bill Deppe, initiated a year long project with his classes to line the
pond, turning it into a fresh water pond for migrating water fowl. The
newly created pond became known as Deppe's Pond or Deppe Pond.
In the fall
of 2003, two students attended a workshop at the Desert Studies Center
in Zyzzx, California. The purpose of this workshop was to revisit the
1984 Recovery Plan for the
Mohave tui chub. They attended with the purpose of suggesting that the
Lewis center's Mojave River Campus be used to construct a refuge for the
fish. Their offer was well received and given serious consideration. Between
2003 and 2005, these students started this web site in anticipation
for permission to begin preparations to host a refuge on campus.
In 2007, two
year after this project founding student had graduated, a campus visit
by three fishery biologists from both the USFWS and the CDFG determined
that Deppe Pond would most likely provide adequate water quality and cover
to support a refuge population of fish if,
- A stable supply of well
water were provided,
- Non-native species were
first removed (gold fish, mosquito fish),
- Invasive plant species (cattails
and bulrush) were removed,
- Water aerators were installed,
- The existing pond be extended
northward to add more habitat space.
of...(12 / 19 / 2008)
8 / 2007 - Present (an
ongoing management item)
12 / 15-23 / 2007
(cattails and bulrush) were removed from Deppe
1 / 5-7 2008
Pond was drained pumped dry in an attempt to get rid
of gold fish and mosquito fish, as well as to eradicate bullfrog
tadpoles. Rocks, plant debris, and trash was as so removed.
1/ 25 / 2008
Kids Construction INC. graded the access road to
the west of Deppe Pond and Tui Slough. Excavated Tui Slough and
graded the east shore so that runoff would not erode the banks
and drain into the refuge. All this work (an estimated $15-17,000
dollars was donated to the refuge construction effort.
Service Inc. // 11455 Whitehaven Ave., Oak Hills, CA
92344 // Phone: 760-956-2555
01 - 02 / 2008
Exploration and Wells drilled two well. One, a 120
foot well, will be used to provide water for both Deppe
Pond and Tui Slough. The second well will
be used to monitor the water level in the aquifer that we are drawing
05 - 06 / 2008
plant debris, and trash
was removed once the water was removed. A water conduit
system was laid to bring water from the newly completed
well to both Deppe Pond and the Tui
09 / 2008
a grant from PetSmart
, materials were
purchased to create an indoor aquarium display which will be a home
for as many as four Mohave tui chub.
display will give the public an opportunity to view this normally
shy fish. To view this aquarium display via a "Chub
click on this link.
Across from the aquarium there is a computer kiosk
that can access this web
or the web blog, "Working
with Mohave tui chub".
09 - 10 / 2008
10/ 2 /2008
(built by Sea
.) was installed on the west shore of Deppe
Students will be designing the panels and preparing
of the pertinent
items and current studies surrounding
this refuge for the endangered Mohave tui chub.
"bubbles" in the
bottom right corner of the left photo. This was installed by students
during the spring of 2008
11/ 8 - 15 /2008
Students released 473 Mohave tui chub transplanted
from the Lark Seep Refuge in China lake.
A second introduction added 75 more fish from Lark seep
refuge. These transplants represent the first of two
planned transplants for Deppe Pond. A
second transplant of more than 500 fish was expected from Zyzzx's
Lake Tuendae refuge but as of 8/22/2012, the refuge on consists of fish taken from the China Lake/Larks Seep refuge.
8th and the 15th, to satisfy his Eagle
Scout Leadership Service Project, Nelson Estes
from Troop 454, Victorville, worked with 10 boys and three adults
on two successive weekends to prepare Tui Slough before and after
the side were trenched on 11/13/2008 for lining.
11/ 13 /2008
, from Conco
, and his helper spent five hours using their
backhoe to dig 250 feet of anchor trenches for the liner along both
sides of Tui Slough.
11/ 21 / 2008
11/ 22 / 2008
November 22nd, to satisfy his Eagle
Scout Leadership Service Project, Nelson
Estes, from Troop 454, Victorville, worked with 8 boys and three
adults on to anchor the top liner around Tui Slough, at bot dams
and put into place the "shore-side" protective liners.
We expect the first late fall rains in a few days.
11/ 26 / 2008
12/ 19 / 2008
is what the refuge looked like after its first rain storm (1/2 inches
of rain). Note the new grading work on the west shore to decrease
erosion into "Tui Slough". All that remains to do is to
fill the "Slough" with 6-8 inches of sand, install 525
feet of four foot high fencing around the perimeter and fill the
pond. We hope to be completed by Christmas 2008.
the 12/5/2008, 10 dump trucks of sand were poured into Tui
Slough. The four-wheel drive tractor and and dump
truck were donated to us by CONCO
Construction. On the 12/7/2008, 575 feet of four foot fence
was installed. By 12/15/2008 all of the sand had been spread with
the help of our PE students and Nelson Estes (to complete the final
phase of his Eagle Project). On 12/16/2008 we bolted the liner to
Tui Slough dam. On 12/17/2008, we received
enough precipitation in the form of rain and snow to fill the Slough.