Computer Help
 Contact
 Search
 
  
    

Jeep JK Lift Kits
Black Diamond JK Lift Kits
Black Diamond PR
Poly Performance JK Lifts
Teraflex Jeep JK Kits
Skyjacker JK Kits
Rancho Jeep JK Kits

Rubicon Express JK Kits

ATV World
ATV Clubs
ATV Tire FAQs
ATV Tire Mounting
Cool ATV Products
LiteFoot Track Sys
ATV Lift Installs
Quad Tire Reviews
ATV Laws By State
ATV Repair
ATV Manuals

Jeep Project CJ-7

An ongoing Budgeted Rebuild/Build up of a Rock
Crawling Machine.

Offroaders Guide to Gearing up for Offroad
From Basic Equipment to Well Equipped.  An extensive list guide to help you prepare your vehicle for the offroad.


Trailering Safety and Trailer Hitch Information


Off-Road Truck Driving Techniques and Safety

25 Top To Do Tips Before Going Offroad
 

Troubled
Computer?

Got Pop-ups
Spyware & Viruses?
Offroaders.com feels your pain. Let our Geeks help you...
RalphtheGeek.com

 


Rausch Creek
Off-Road Park

 

Jeep Central
From Jeep History to Tech Specs and Projects.  This section is all about Jeeps.
Jeep Technical Info
Engines
Transmissions
Transfercases
Axles
Engine Swaps

Installing 23,000 Volt Offroad Lights


Onboard Air
Converting a York
AC Compressor
to Pump Air

What are HID Lights?

Onboard Air
Converting a York
AC Compressor
to Pump Air

Warn 9500i Winch Installation

Warn X8000i
Winch Installation

 

HEI Ignition
Installation & Review

Lockers, Limited Slips &
other Differentials Explained

 

 

 

Wheeling in the Valley of the Ferns

1.jpg (70086 bytes)
Tellico North Carolina


Paragon Adventure Park
Rock Krawl

Thousands more photos here..

 
 

 

 

 

CRREL recovers Jeep from frozen lake

Article and Photos by
Maj. Michael Meeks
CRREL

Cold Region Research and Engineering Laboratory (CRREL) personnel recently recovered a wrecked vehicle from a deep frozen lake.

Last winter, a CRREL contract employee was driving a government-owned Jeep Cherokee along the Glenallen Highway in central Alaska when he lost control and plunged 80 feet over a cliff. The vehicle rolled several times, landed in the lake and sank in the frigid water.

The driver's seatbelt saved him from serious harm. He managed to unfasten his seatbelt, swim to the surface, and back to the bank. He climbed up the snow-covered cliff, walked down the highway, and was picked up by a passing motorist. He suffered a small cut on his cheek, ruptured eardrums from water pressure, and hypothermia.

Months later, the Jeep was recovered from 40 feet of water under four feet of ice. CRREL employees and the Arctic/Subarctic Aquatic Pararescue Group (ASAP) managed the recovery.

A diver enters the lake. The ice is 48 inches deep.

Challenge

The Jeep was removed from the lake for environmental reasons. The General Services Administration, who owned the Jeep, planned to contract the recovery to a private contractor, but CRREL felt they could recover it at lesser cost and wanted the challenge. Plans were made and ASAP agreed to lead the extraction team.

Underwater topographic maps showed the lake was up to 90 feet deep with a steep underwater slope. The slope of the shoreline was too steep to use a vehicle on the slope or on the road 80 feet higher.

By springtime the lake was frozen solid. The initial plan called for cutting a small hole through the ice so divers could go down to locate the vehicle. Chainsaws would cut away large sections of ice next to the shore, allowing cables to be attached to the Jeep. Divers using lift bags would raise it off the bottom. As people on the shore hauled the cables, divers would maneuver the vehicle toward the opening.

Change of plans

But reconnaissance showed that the lake ice was thick enough to support heavy vehicles, so CRREL changed plans to extract the vehicle through the ice. ASAP provided diving equipment, rigging, medical equipment, and expertise. Paramedics were on the scene and they developed a detailed dive plan and adhered to it. The volunteers assembled at Lake Long from around Alaska.

When we arrived, we found the ice thickness had been underestimated. Instead of 18 inches, it was 48 inches thick. This was due to high winds which sweep the ice clean of snow, allowing it to freeze thicker than surrounding snow-covered lakes.

Cutting the first section was a tedious process. We cut the first section for the dive with two chainsaws, one with a three-foot bar, the other with a four-foot bar. The first section took four hours of cutting, prying, and smashing ice. As the ice was cut, divers in insulated suits wedged the pieces under the ice sheet.

The ice-cutting went much slower than expected due to the ice thickness. Chainsaws froze up in minutes after getting wet. We set up a heater and the chainsaws were alternated in front of it to thaw every time one froze.

The first diver finally went through the dive hole to locate the wreck. A second diver stood by as an emergency back-up. The depth directly under the opening was 60 feet, sloping to 90 feet. Due to the altitude (2,000 feet above sea level), the divers' bottom time was reduced to 15 minutes.

Within minutes after starting his search, the diver located the Jeep in 40 feet of water. It was lying on its side, hung up on a large boulder. If the vehicle was not handled properly, it could slip off the boulder and slide down the incline, crushing any diver under it.

Once the first diver was topside, a second diver went in to mark the site so a hole could be cut directly over the vehicle. The ice was so clear that it was easy to watch the diver as he moved underwater. He attached a float to the vehicle; those standing on the ice marked the float's location, and began cutting the recovery hole.

Hard work

The divers reported back that attempting to float the vehicle under the ice to the shore was impossible. It would be extremely difficult to route the vehicle through the large boulders on the bottom.

But with the ice thickness at four feet, it would be possible to bring a wrecker onto the lake and pull the Jeep up through a hole in the ice. Eight hours later, a recovery hole measuring 8x7 feet was finished. Seven tons of ice had been cut and moved in two days.

The water was so clear that everyone could see the Jeep on the bottom of the lake once the ice was removed. Two divers suited up using air supplied from the surface, and a two-way intercom. They carried an underwater video camera to record the event.

Both divers descended through the dive hole to the Jeep. They attached a safety line to the vehicle which was secured to trees along shore to keep the vehicle from sliding down the slope and injuring anyone.

After all winter on the bottom of a frozen lake, the Jeep finally breaks surface.

Recovery

There was a wrecker at the site and the divers attached its cable to the Jeep's axle. Once the divers were back topside, it was all up to the wrecker. To improve the wrecker's traction on the ice and keep it from sliding into the hole, we put sand and gravel on the ice. We chained a second vehicle to the wrecker to provide additional traction.

Then the wrecker lifted the Jeep off the bottom of the lake. As it neared the surface, large poles were used to pry it away from the underside of the ice and into the center of the recovery hole.

Once the Jeep broke surface, we allowed the water to drain from it to reduce the weight the wrecker had to lift. Within minutes the Jeep was safely on the ice.

Absorbent pads were placed on the water to soak up oil or fuel that might have been released during the recovery. Warning signs were placed around the hole so that snowmobilers would stay clear. Much of the ice that was removed was replaced back in the hole to aid refreezing.

 

From The United States Army Corps of Engineers (USACE)
Engineer Update
is an unnofficial publication authorized under the provisions of AR 360-81. It is published monthly for the U.S. Army Corps of Engineers. Editorial views and opinions expressed are not necessarily those of the Corps of Engineers or the Department of Defense. Inquiries and comments can be forwarded to editor of Engineer Update by e-mail to Bernard.W.Tate@usace.army.mil.

Jeep Project CJ-7

An ongoing Budgeted Rebuild/Build up of a Rock Crawling Machine.

All Terrain 
Mud Terrain
Tire Reviews & Info

All Terrain
AT Tire Reviews


Mud Terrain
MT Tire Reviews

 

 

Ramp Travel Index
RTI / Ramp Travel Index What it is and how to calculate it, with and without the ramp.

Offroad Tire Info
P-Metric Tire Sizes Conversion to Inches
Tire Terminology
Wheel Terminology
How to Pick the Right
Tires for your Truck
Truck Tire Info
Tires - What Hits What Fits
  
All Terrain  Mud Terrain
Tire Reviews & Info
Mud Terrain MT Tire Reviews
All Terrain AT Tire Reviews
Super Swamper Bogger
Super Swamper SSR
Super Swamper SX
Super Swamper Vortrac
Interco IROK TSL
Super Swamper LTB
Super Swamper TSL
Super Swamper TSL Radial
Super Swamper Narrow
Interco SS-M16 Swamper
Thornbird TSl Radial
Thornbird TSl Bias
Thornbird TSL
Parnelli Jone Dirt Grip
BFGoodrich Krawler
BFGoodrich MT T/A KM
BFGoodrich MT T/A KM2
BFGoodrich AT TA KO
BFGoodrich Mud King XT
Bridgestone Dueler MT
Cooper Discoverer ST
Cooper Discoverer STT
Cooper Discoverer ST/C
Federal Couragia MT
Firestone Destination AT
Firestone Destination MT
General Grabber MT
General Grabber AT2
Green Diamond Icelander
Ground Hawg Mud Tire
Hankook Dynapro MT
Hankook Dynamic MT RT01
Hercules Terra Trac MT
Hercules Trail Digger MT
Kelly-Springfield Safari DTR
Kelly-Springfield Safari MSR
Kumho Road Venture MT
Kumho Road Venture KL71
Kumho Road Venture AT
Dick Cepek Mud Country
Dick Cepek F-C II
Dick Cepek Fun Country II
Dick Cepek Fun Country Nylon
Dick Cepek Fun Country Kevlar
Mastercraft Courser MT
Mastercraft Courser HTR
Mastercraft Courser HTR Plus
Maxxis BigHorn Radial
Maxxis Creepy Crawler
Maxxis Trepador
Maxxis Buckshot Mudder
Maxxis MA-SW
Maxxis M-8080 Mudzilla
Maxxis MT-754 Buckshot
Maxxis MT-753 Bravo
Maxxis MA-751 Bravo
Maxxis MA-S2 Marauder II
Maxxis MA-S1 Marauder
Maxxis MT-762 BigHorn
Nitto Mud Grappler
Nitto Terra Grappler
Nitto Dura Grappler
Nitto Dune Grappler
Nokian Vatiiva MT
Pit Bull Rocker Extreme
Pit Bull Maddog
Pit Bull Growler
Goodyear Wrangler MT/R
Pro Comp Xterrain
Pro Comp All Terrain
Pro Comp Mud Terrain
Pro Comp Xtreme AT
Pro Comp Xtreme MT
Toyo Open Country MT
TrXus Mud Terrain
TrXus STS All Terrain
Michelin LTX A/T
Michelin LTX AT2 Press
Michelin LTX AT2
Mickey Thompson MTZ
Mickey Thompson MTX
Mickey Thompson Baja Claw Radial
Mickey Thompson Baja Claw Bias
Mickey Thompson Baja Crusher
Mickey Thompson Baja ATZ Radial SLT
Competition Claw
Dunlop Mud Rover
Federal Couragia M/T
Nitto Dura Grappler
Yokohama Geolandar
  
Dick Cepek's 2008 F-250 Super Duty Project Vehicle Project CRUSHER
 
Mud Tire Reviews
Product Reviews
Tire Reviews
 
  
 
ATV Tire Index
Carlisle 489 Titan
Dunlop Quadmax
Dunlop Quadmax Sport
Quadmax Sport Development
Highlifter Outlaw
ITP Holeshot
ITP Holeshot MX
ITP Holeshot ATR
ITP Holeshot XC
ITP Holeshot XCR
ITP Holeshot MXR
ITP Holeshot XCT
ITP Mud Lite
ITP Mud Lite XTR
ITP Sandstar
Kenda K538 Executioner
Tubeless Bearclaw K299
Kenda Klaw K532
Kenda Klaw K533
Kenda K534 Sand Gecko
Maxxis M961/M962 Mud Bug
Maxxis Rooster Paddle Tire
Maxxis M917/M918 Bighorn
Maxxis M966 Mudzilla
Super Swamper TSL ATV
Super Swamper TSL Vampire
Super Swamper Vampire EDL
Swamp Lite ATV Tires
 
ATV Tire FAQs
ATV Tire Mounting
ATV / Quad Links
 
Quad Tire Reviews Index

 


Off-Road Lights
by LightForce Product Review / Installation.
from Off-Road Lights

 


Jeep Dana 300 TeraLow - 4:1 Gearset for the Dana 300 Transfer Case

Jeep Trans Swap
T-18A Transmission Rebuild & Short Shaft Conversion
  


Black Diamond Suspension Lift install for CJ-7

 

From the
Department of Cheap   Tricks and Useful Tips

  
Ultra-Cool Hand Throttle for Free!

Jeep V8 Swap Tips

The Exploding Clutch

Radiator Protection using 6 bucks worth of material

Cracked Under Pressure - Fixing a smashed fingernail

A Cheap, effective alternative to undercoating

Home-built Saginaw Gearbox Brace for the cost of lunch!

Ammo Box Storage - Mounting Them for Quick Disconnect

Home-built Serious Skid-Plate protection for the Oil Pan for under 20 bucks!