ATT_6_-_Geothermal_Boring_Soils_Report_-_232113.33_Attachment_Jackson_FS_Full_TC_Report_-spec.pdf

DRILLING LOG - Test Borehole

Location: Legal NWSW S27 T41N R116W Sixth Mer., WY Approx. Address: NE of existing Shed, E of HQ Bldg.

GPS WGS84 43°29'2.31"N, 110°45'40.18"W Approx 43' from NE corner of shed Elevation 6226' (GPS) Approx. 60' from NW corner of shed

340 N. Cache St.

Driller: Glenn Henderson - Bertram Drilling Jackson, WY 83001

Rig: #84 - Midway Drilling Fluid: Mud - Baroid QuikGel Joints on Rig: 20 x 20'

Loop: Centennial 810' x 1.25" DR-11 HDPE U-Bend Length of Kelly: 20' Grout: Baroid Barotherm Gold 0.40 (no sand) Total Reach: 420'

SPUD/TD: 10/17/2014 13:18 -- 10/18/2014 9:34

Spud with: 5-1/2" Button Bit - Used, good condition

Surface Water: None (shallow water expected)

NOTE: Time gaps represent connections or unrelated activity.

Duration Start End Hrs:Min From To

10/17/2014 12:00 13:18 13:18 13:22 D 0:04 0 10 13:22 13:28 D 0:06 10 20 13:28 13:32 13:34 13:44 D 0:10 20 30 13:44 13:56 D 0:12 30 36

13:56 14:01 D 0:05 36 40 14:01 14:14 14:15 14:22 D 0:07 40 50 14:22 14:37 D 0:15 50 60 14:39 14:52 D 0:13 60 70 14:52 15:00 D 0:08 70 80 15:03 15:08 D 0:05 80 90 15:08 15:13 D 0:05 90 100 15:15 15:22 D 0:07 100 110 15:22 15:30 D 0:08 110 120 15:32 15:38 D 0:06 120 130 15:38 15:45 D 0:07 130 140

15:55 15:58 D 0:03 140 150 15:58 16:03 D 0:05 150 160 16:05 16:11 D 0:06 160 170 16:11 16:15 D 0:04 170 180 16:17 16:21 D 0:04 180 190 16:21 16:25 D 0:04 190 200 16:27 16:31 D 0:04 200 210

16:31 16:38 D 0:07 210 220 16:39 16:48 D 0:09 220 230 16:48 16:58 D 0:10 230 240 16:59 17:09 D 0:10 240 250

DRILLING LOG - Test Borehole #1 10/17/2014 - 10/18/2014

Depth (Ft.) CommentsTime Activity

Stiff gray-brown clay, tr 3/4"- gravel & coarse sand

Thin hard layer ~201'

Rig up, mix 1 sx Bariod QuikGel Brown silty clay, tr cobble ~3'

Stiff gray-brown clay, tr coarse sand & gravel

New Headquarters Building

Jackson, WY

Geothermal Soil Analysis

U.S. Forest Service - Jackson Admin Site

AA

Brown silty clay

AA to 72'; 72-80' Tan clay w/ coarse sand

1/2"- gravel, rounded to angular, tr clay

Circulate Coarse sand w/ thin gravel layers ~20' & ~25' (water present)

3/8"- gravel, rounded, tr clay (fluid loss stabilized)

AA

Stiff gray-brown clay, tr coarse sand

AA

Stiff gray-brown clay; 3/4"- gravel layer ~217' Stiff gray-brown clay w/ layers 1/2"- gravel

AA

Stiff gray-brown clay w/ layers 1/4"-1" gravel

POOH, bit in good cond., change to new 5-1/4" button bit

AA

Stiff gray-brown clay, tr 1/4"- gravel, coarse sand;

A llu vi al

D ep os its

C la y, G ra ve l, S an d, S ilt

Small gravel & coarse sand (mud thinning, still losing fluid) Work pump & drill slowly - fluid down ~1.5" in pit

Circ. & ream; mix 1 sx QuikGel

AA

Gray-brown clay w/ tr 1"- gravel & coarse sand

Stiff gray-brown clay, tr coarse sand

110-113' 1/2-1" rounded gravel; 113-120' tan clay, tr sand

1"- gravel w clay (50/50) 1/2"- gravel, tr coarse sand & clay

Gray-brown clay w/ 1/4"- gravel & coarse sand

RFP AG-02NV-S-15-0024 Bridger-Teton SO/District Ranger Building Construction Project Attachment 6

DRILLING LOG - Test Borehole

17:09 17:31 D 0:22 250 260

17:33 17:41 D 0:08 260 270 17:41 17:45 D 0:04 270 280

18:15 10/18/2014

7:00 7:15 7:15 7:46 7:47 7:51 D 0:04 280 290 7:51 7:57 D 0:06 290 300 8:00 8:14 D 0:14 300 310

8:14 8:36 D 0:22 310 320 8:38 8:49 D 0:11 320 330 8:49 9:09 D 0:20 330 340 9:11 9:28 D 0:17 340 350 9:28 9:34 D 0:06 350 355 9:34 9:49 9:49 9:54

Total Drilling Time: 5:18 Hrs:Min Drilling 0 - 355'

COMMENTS:

10/17/2014 Pressure test HDPE loop to 120 PSI for 1.5 hours.

10/18/2014 RIH HDPE loop to 342' where resistance could not be overcome.

RIH 1.25" flexible tremie hose to 342' no problems.

10:10 11:36 Mix & pump 27 units of Barotherm Gold 0.40 with returns to surface.

Mix: 50 lb. Barotherm Gold + 15.3 gal. water, no sand.

Per MFG: TC 0.40, 17.6 gal. yield per unit,10.1 lb/gal, 28.1% solids.

10/19/2014 Grout level down approx. 18".

10/20/2014 Per driller - topped off to surface.

Total grout pumped 27 units; calculated min. annular volume approx. 19.2 units (no loss).

Gray & tr white sandy clay w/ coarse sand & gravel layers;

AA

Gray & tr white sandy clay w/ coarse sand & gravel layers

AA

AA

POOH, no problems

256-260' gray silty clay Gray silty clay, tr coarse sand & gravel Gray silty clay, tr black angular gravel

AA; cobble ~ 253-254'; 254-256' fine silt, tr coarse sand;

AA

AA

Gray silty clay w/ thin gravel layers, tr coarse sand

POOH, Bit still in excellent condition, SDFN

Rig up - fluid level in bore down 10-15' RIH to 280'; ream minor mud rings starting at 150'; no caving several cobbles

A llu vi al

D ep os its

C la y, G ra ve l, S an d, S ilt

Drilling observed and samples logged by David Eckels of Sound Geothermal.

The test bore was drilled through alluvial deposits, possibly braided stream channels, consisting of layers of clay, silt, gravel, sand, and an occasional cobble. Minor drilling fluid loss was encountered in gravel layers between 20 and 40 feet, indicating the presence of water.

This fluid loss was stopped by thickening the drilling mud. This was the only notable zone of water gravel in the bore (no more fluid loss);

gravels in the rest of the bore appeared to be bedded with clay and coarse sand. Borehole stability appeared to be good - after sitting overnight at 280' there was no caving the next morning. Drilling times were relatively good, averaging 1.1 ft./min. for the entire bore, however the rate of penetration did slow somewhat below 300 ft. Earthloop insertion was slightly delayed due to an equipment issue with the cable spool - it is suspected that this delay allowed silt to settle out and fill the bottom of the bore. The tremie was inserted to the same depth without issue.

Circulate & thin mud

Geothermal Soil Analysis

Colors: Descriptors: Lithology: Drilling:

blk - black ang - angular bas - basalt AA - As Above blu - blue cmt - cement bdl - boulder PU - Pick Up brn - brown crs - coarse cbl - cobble POOH - Pull out of hole bu - buff dk - dark cche - caliche RIH - Run in hole clr - clear f - fine cgl - conglomerate RU - Rig Up crm - cream frm - firm cl - clay SDFN - Shut down for night gn - green hd - hard dol - dolomite SX - Sack(s) gry - gray L - Large grt - granite TD - Total Depth pk - pink lt - light grv - gravel w/ - With rd - red M - Medium ls - limestone tn - tan mtrx - matrix qtz - quartzite trnsl - translucent S - Small sd - sand wh - white sbang - sub angular sh - shale yel - yellow sft - soft slt - silt tr - trace slts - siltstone uncons - unconsolidated ss - sandstone volc - volcanics

LEGEND