20241101ASP to Staff 8 - Attachment Well Drilling2 (1).pdf

WATER WELL CONSTRUCTION PLAN
This construction plan is for a new well to be drilled as part of the development of Aspen Creek
Meadows Phase 2. The well will be owned and operated by the Aspen Creek Water Company, a
corporation licensed by the Idaho Public Utility Commission. The well site has been previously
evaluated and approved by Charles Ketterman of the Department of Environmental Quality on
April 61", 2005, and approved on April 261", 2005. In an effort to simplify this plan, I will use the
checklist for drinking water well construction as a template. I will try to follow closely with the
items listed on the checklist. For this reason,there may be some redundant information stated
in this plan. A map showing the actual well location and drilling depth has been included as an
appendix. Also included in separate appendices is Section 37.03.09 of the Idaho Administrative
Code (IDAPA) relating to well construction standards,Section 3 of the Recommended Standards
for Water Works(RSWW), and specification sheets of actual fluids used during the drilling
process.
III. ADMINISTRATIVE REQUIREMENTS
Aspen Creek Water Company, hereafter referred to as Owner, has contacted IDWR and has filed
an application for drilling permit. They currently have a permit to appropriate water(no. 11-
07436) dated June 151h, 1998. This permit is valid for 105 homes. Copies of both permits are
included with this report. In addition to these permits, a copy of the well site approval will be
provided when it is received. There was verbal approval given during the evaluation from the
representatives in attendance. During the evaluation, there was considerable discussion
relating to separation distances. The only possible concern is an old irrigation ditch that passes
within 20 feet of the well site. This ditch will be abandoned as the site is developed and the
ditch will be piped beyond the minimum separation distance. There will be professional
engineering and inspection service available during well construction. At the current time,we,
Turner Design, have been hired for this purpose. The owner may have additional inspection
services on site during the actual drilling.
IV. MATERIAL AND EQUIPMENT
The equipment that will be present during the drilling will be a drilling rig,two support flatbed
trucks holding various tools required for maintenance of the rig, casing pipe, drill heads,
bentonite chips, Quik-Foam', water hoses and lunch. There will also be a water truck capable of
holding 500 gallons of water to be used during the drilling process. All of the fluids and
chemicals used during the well construction have been approved for well construction under
NSF Standard 61. All vehicles will be instructed on how to access the site and where to park to
minimize damage to the site and prevent erosion and possible well contamination. The well
location will be clearly marked before the drilling company accesses the site. All material will be
stored in approved containers. Any spills will be reported immediately to the Public Utility
Commission, local water board, or emergency response teams if necessary. However, no
chemicals will be used extensively on the site which are deemed dangerous to the environment.

V. GEOLOGIC SAMPLING
The geologic sampling will follow the procedure outlined in RSWW 3.2.4.3. Inspection will occur
at required intervals, but only pronounced changes in formation will be recorded in the driller's
log. This information will be submitted to IDWR when the well is completed. After reviewing
the well drilling history in the area, and speaking with a representative of Westlake Drilling, it
does not appear that additional geophysical logs will be required. Samples will be collected and
saved if requested by IDEA or IDWR. If this request is not received,the samples will be
discarded when the drilling is complete.
VI. DRILLING
The method to be used in this well drilling will be air rotary. Air rotary drilling, the ideal method
for advancing boreholes into consolidated bedrock formations, uses a rotary-driven drill bit and
high-pressure, high-flow air.Typically, either a "tricone" cutting bit or a downhole percussion
hammer is used to penetrate the rock surface and grind the rock into small particles. In this
specific case, a carbine cutting tip will be used. High-flow air is injected through the drill string,
cooling the bit, evacuating rock cuttings from the borehole, and stabilizing the borehole during
drill operation.
The air-rotary technique is much more efficient than other rock drilling techniques (i.e., cable
tool) because the high-flow air constantly cleans the bottom of the borehole, which allows for
consistent contact between the drill bit and intact bedrock.The size of the air compressor and
borehole determine the achievable depth, since the compressor must maintain an uphole
velocity of approximately 3,000 ft/min to effectively remove the drill cuttings. In bedrock
formations where cuttings removal is more difficult,foam can be added to the injected air to
increase the viscosity and help lift cuttings from the bore.
GEOGRAPHICAL CONDITIONS
Typo of Formation
Geologic Origin-! Igneous and Metamorphc Sedimentary
Examples-) Granite Ouartzite Lmeslone Sandstone Shale Clay Sand Gravel
Basall Gneiss Schist
Hardness-), Very hard to hard Hard to soil Unconsolidated
I I
Grilling Metliods
Downhole drill Rotary drill
E Air or foam rotary—lt►i—Mud rotary
Carbide ­*—Carblde t00%bi^s-0-
insert Hit
do Steel tooth oils
Figure 1.

It is anticipated that the majority of the drilling condition will be through brigham quartz. This
has been the case in all of the wells drilled within a two-mile radius of the proposed well site.
For this reason, a carbide tip will be used in the drilling process. A foam, Quik-Foam®, will be
used to assist in the removal of the cuttings during the drilling process. All downhole materials
will be cleaned and disinfected with 500 ppm chlorine solution. The anticipated volume of
cuttings removed from the well will be 127 c.f.. This material will be used onsite as possible
road base if it can be compacted.
VII. CASING
The thickness for the 8"steel pipe casing shall be 0.280 inches. There is a discrepancy between
IDAPA and RSWW in this criteria. According to IDAPA 37.03.09.025.02a the nominal wall
thickness should be 0.250 inches. Table 1 of RSWW lists the thickness at 0.280 inches. In this
case, RSWW governs because it is more conservative. The steel pipe sections will be welded
with a non-lead containing solder. The weld thickness shall be at least the thickness of the
casing wall thickness (0.280") and completely penetrating. Before welding the sections,the
ends should be checked for plumb and square. This will aid in the overall plumb on the well.
Other pipe specifications such as weight and external diameter are contained in the previously
mentioned Table 1. There will not be a temporary casing used in this drilling operation, except
for the top 6' feet. This area will have a 15"temporary casing installed for the purpose of
installing the pitless adapter. After the adapter is welded, the temporary casing will be removed
and the seal will be restored. The dry soils will make it possible to construct the remainder of
the 12" annular seal without a casing. The sidewalls of the seal shaft will be stiff enough to
support the soil pressure when the sealing agent is added.
Lithologic information obtained from nearby wells indicates there are fractures in the quartz
between 280 and 296 feet. The well casing shall penetrate below this fracture a distance of 30
feet. This sets the anticipated well depth at 330 feet below ground surface. Drive shoes will
not be used to seal the casing. The allowable tolerance for plumbness in the well will be 2/3 of
the casing diameter, or 4 inches. If this tolerance is not met,the well may still be approved if
the plumbness does not hinder seal placement or well operation. The top of the casing and
finished grade of the well will comply with IRPDWS regulations, namely 18" above finished
ground, or 12" above the concrete floor of the well house. The permanent vent will be installed
per RSWW 3.2.7.6.
Vill. SEALS
The seal for this well shall be dry bentonite chips of 3/8"-0" gradation. They will be hand-
poured at a slow and continuous rate to allow for even distribution. This is especially true if
shallow groundwater is encountered. The chips will be poured at a very slow rate to ensure an
intermediate seal is not created. Pelletized chips were considered, but after further research, it
was found that there are limitations with this product. The "skin"that is emulsified over the
pellet is sometimes too difficult to dissolve. In fact,the manufacturer is doing further testing to
see if a better product can be developed. In direct phone conversation with the supplier,they
recommended the chips over the pellets, with the instruction that the delivery rate be
monitored very closely under groundwater conditions. I spoke with the well driller and he
walked me through the method in which they take measurements during the bentonite pouring

to ensure no intermediate seal is formed. It involved estimating the quantity of chips and then
measuring a volume of displaced water to verify the volume of chips. As previously mentioned,
an on site inspector will monitor the cutting extractions for type and consistency. The 12"
diameter seal shall extend to a depth of 100 feet below ground. This should require
approximately 35 bags of bentonite chips. A minimum of 50%, or 17 bags, of additional chips
shall be present on site until the project is completed and deemed acceptable by IPUC and IDEA.
There will be no cement or grout used in the seal. The risk of contamination of the well is too
great. The bentonite chips offer an excellent alternative. Guides shall be installed on the casing
at 50-foot intervals. This will also allow for uniform consistency between the native material
and the casing.
IX. SCREENS AND PERFORATED CASINGS
When the actual zone, or zones, of water is found, the depth(s)will be recorded and a knife
dropped to that (those) level(s) and the casing perforated. These perforations will be done
onsite. The specification for this perforation will also be done on-site as the well and penetrated
water zone is evaluated. There will be no screen associated with this well. The existing
lithologic records in the area show there is no presence of sand.
X. FILTER PACK
The filter pack shall consist of washed pea gravel. It will be designed onsite as the well is
developed and a sieve analysis performed. Since no grout will be used,there will be no leakage
into the filter pack. The filter pack shall have a minimum working depth of 3' above and below
the perforations. This method has been used in all of the surrounding wells in the area.
XI. WELL DEVELOPMENT
The well will be developed to its maximum capacity. This development will remove all silts and
any remaining drilling fluids. After development is finished, a preliminary sample shall be tested
by an approved testing lab to meet IDAPA and IDEA requirements. Although highly unlikely to
be encountered,the sample shall be checked for sand to ensure meeting the state requirement
of<5 ppm. The sump shall be thoroughly cleaned and flushed to remove all contaminants.
XII. FINAL PRODUCTION TESTS
Throughout the final production test, an engineer, or a representative of the engineer, will be
present. The water must be tested for a full battery of regulated constituents. The pump rate
and duration are specified at a minimum of 40 GPM for 3 hours. The well will be tested at this
rate for 24 hours after the stabilization of the drawdown has been established. During this
testing, data will be taken as to rate, drawdown, and other criteria listed in IRPDWS 550.03.f.iii.
This data will be supplied to IDEA upon final well production testing. A final test sample will be
taken to an approved testing lab and the results supplied to IDEA. The testing procedures
followed for the existing well on the site will be duplicated for this proposed well. This will be
done because it is in the same vicinity and is under the same jurisdiction of the IPUC. TV
inspection of the final well will be required. The results shall be furnished to IDEA upon their
request. The owner will retain copies of all tests and reports to be permanently held by a

representative of Aspen Creek Water Company. Please contact Barbara Jones at 208-236-6160
for testing protocol and a list of certified testing labs.
After the final pumping equipment is placed and tested,the well shall be disinfected and flushed
to remove all chlorine.
XIII. PITILESS ADAPTERS
The pitless adapter to be installed shall be a 3" MAAS#8J3 installed in the 8" steel casing. This is
a welded model that will be installed 4-5 feet below existing ground. This model carries the
approval of NSF. The upper casing of the 10" annular seal shall be restored to the original
specifications.
XIV. SITE CONTROL
Silt fence shall be placed on the site as shown of the accompanying plan before drilling is to
begin. It is imperative that this be done to retain sediment contained in the drill cuttings. The
drilling debris that cannot be used onsite, including waste foam shall be disposed of at an
approved landfill. The driller is required to furnish a receipt from this landfill to the owner.
Because of the remote location of this well, noise control will be a low priority. However,the
driller shall perform work only during the hours of operation specified by Bear Lake County and
the City of Fish Haven. During all construction activity, appropriate OSHA requirements are to
be followed. If in question,the driller shall contact IDEA or IDWR before releasing runoff past
he erosion control measures. When the area has been stabilized and all drilling completed,the
driller shall remove all equipment in an orderly timeframe.
XV. PROJECT COMPLETION
Any areas stripped of vegetation shall be reseeded after work is completed. Any holes or pits
shall be filled in and all stockpiles leveled to a grade approximate to that existing before drilling
occurred. The temporary silt fence shall be removed and the well site flagged for easy visual
identity. The well shall be capped with a %" new, or like new, steel plate welded in place, a
threaded cap, or a watertight sanitary seal cover cap.
All data including well logs, pump production data, pump curves, and lithologic data shall
promptly be supplied to the engineer, owner, IDEA, and IDWR.
APPENDIX A

WELL SITE PLAN

APPENDIX B
IDAPA 37.03.09

APPENDIX C
RECOMMENDED STANDARDS FOR WATER WORKS 2003

APPENDIX D
IDAPA 58.01.08

APPENDIX E
DRILLING FLUID SPECIFICATION

APPENDIX F
DRINKING WATER WELL CONSTRUCTION DESIGN CHECKLIST

TABLE OF CONTENTS
Water well construction plan 1-5
Appendix A— Well site plan
Appendix B — IDAPA 37.03.09
Appendix C — RSWW 3.0
Appendix D — IDAPA 58.01.08
Appendix E — Drilling fluid specification
Appendix F - Checklists