Walnut Creek Mining Company 

10949 North Tidwell Prairie Rd 

Bremond, TX 76629 

October 21, 2015 

U.S. Department of Transportation 

Docket Management System 

1200 New Jersey Ave., SE 

Washington, DC 20590 

Re: Exemption Request Under Section 333 of the FAA Reform Act and Part 11 of the Federal 

Aviation Regulations 

Dear Madam, Sir, 

Pursuant to Section 333 of the FAA Modernization and Reform Act of 2012 (the “Reform Act”) 

and 14 C.F.R. Part 11, Walnut Creek Mining Company (“WCMC”), an operator of the eBee 

Unmanned Aircraft System (“eBee”) seeks an exemption from the Federal Aviation Regulations 

(“FARs”) listed below: 

• 14 C.F.R. 21 

• 14 C.F.R. 61.133(a) (b) 

• 14 C.F.R. 91.7(b) 

• 14 C.F.R. 91.119 

• 14 C.F.R. 91.151(a) 

• 14 CFR Subpart E (91.401 - 91.417) 

The requested exemption would authorize commercial operations using the eBee for mapping, 

training, agricultural and survey applications. These operations will be subject to strict operating 

requirements defined in the eBee user manual (WCMC requests the FAA treat the eBee training 

program as proprietary under 14 C.F.R. 11.35(b) and does not include this document in the public 

docket and conditions defined in the paragraph 3. 

WCMC was incorporated in 1989 with the development of the Calvert Mine, located in Robertson 

County, Texas. The Calvert Mine produces lignite coal for power generation at the Twin Oaks 

Power Plant located adjacent to the mine property. WCMC controls access to 8,668 acres of land 

within the mine permit area. The active mining area, where the eBee will be utilized, is 6.7 miles 

from the nearest town, Bremond Texas. The closest airport, Hearne Municipal Airport 

(KLHB/LHB) is 28 miles southwest of the mine site. 
The land area surrounding the Calvert Mine is sparsely populated, with Bremond having a 

population of 914 residents. Predominant land use around the mine permit is ranching/farming. 

Figure 1: Google Earth Image of Calvert Mine, mine permit boundary depicted in blue polygon. 

WCMC mine planning engineers specialize in surface lignite extraction. Mine plans generated 

take into account, clearing and grubbing of pre-mine vegetation, topsoil salvage, mine waste 

removal, lignite coal extraction, mine land reclamation including topsoil replacement and post 

reclamation monitoring. The goal of the mine planning staff is to increase safety and costeffectiveness to provide the lowest fuel cost for power generation into the Texas electrical grid for 

public power consumption. 

Unmanned Aerial Vehicle (UAV) technology, and its associated data, is becoming a desirable 

deliverable with the surface mining industry. Traditional GPS data collection, available imagery, 

traditional aircraft flyovers, and surface models lack resolution and accuracy for elite project 

planning. UAV collected data allows mine planning engineers to depict the active mining area 

with great accuracy, resolution, in a timely manner. As importantly, the unmanned aspect reduces 

the risk of placing employees in perilous environments. 
1. CHARACTERISTICS OF THE AIRCRAFT 

The eBee is a small (37.8 inches wingspan) and ultra-light (maximum take-off weight of 1.7 

pounds) platform made of flexible foam that performs pre-programmed precision aerial mapping 

missions thanks to the on-board GPS and the related flight management software (eMotion) that 

allows the operator to plan safely and efficiently a mission in 3D, and then monitor it in real-time. 

Thanks to the embedded camera, protected by a foam envelope, the eBee takes a collection of 

high-definition still images that are used later to generate maps and contour lines of the surveyed 

area. 

The four main characteristics of the eBee are: 

a. Very light weight 

The eBee is so light that the operator can launch it by hand and let it land on almost any surface 

without requiring a parachute or landing net (belly land). Its low impact energy (38 J in case of a 

controlled emergency landing) also significantly reduces the risk of hazardous situations. Finally, 

the wings of the eBee are detachable and made of flexible foam with no sharp or hard edges and 

almost no internal strengthening structure. 

b. Electric-powered 

The eBee is electric powered. A brushless engine technology makes it silent and reliable. The 

propeller is attached with a rubber band to the body of the plane so that it can easily flex away in 

case of contact with any object. 

c. Semi-automatic flight 

The artificial intelligence incorporated within the eBee autopilot system continuously analyzes 

data from the Inertial Measurement Unit and from the onboard GPS and takes care of all the 

aspects of the flight under the supervision of the operator. 

d. Option for Manual control 

Additionally, the eBee provides an override capability that allows the operator to take manual 

actions during the flight (Go to Home, Go Land, Hold and Resume the mission) and also suspend 

automated operations and take manual control of the aircraft should it become necessary to 

respond emergent circumstances, thanks to the remote controller provided with the system. 
2. APPLICATIONS 

WCMC intends to utilize the eBee for the purpose of conducting aerial surveys to gather data 

used for the purpose of creating mine sequence plans, calculating volumetric of topsoil salvage, 

mine waste stripping, lignite coal extraction, and land reclamation. 

Using the eBee’s sensor technology, WCMC will be able to collect time-specific imagery and 

elevation information. Once the entire terrain of interest in flown, images collected during the 

flight will be merged together in a software program to make a topographic model. Using 

specific mathematical equations within the Postflight Terra 3D software, project field conditions, 

terrain characteristics and potential hazard areas can be easily identified. 

The eBee will be used to evaluate information, including but not limited to: 

• Topographic characteristics 

• Volumetric estimates 

• Slope and terrain impediments 

• Natural and cultural resource identification 

• As-built feature identification and analysis 

• Hazard evaluation (ground stability, water impoundment inspection) 

• Project design evaluations 

Usually, in order for a surface mine to prepare fill sequence, soil management or other 

operational plans, a flyover by a large aircraft is required, at great cost. As a result, WCMC has 

reduced the number of times they conduct traditional flyovers, which can negatively impact their 

efficient use of time, money and resources. 

3. APPLICABLE LEGAL STANDARD UNDER SECTION 333

a. Airworthiness assessment of the eBee 

WCMC notes that the airworthiness of the eBee has already been demonstrated for different 

projects in the United States, involving state/federal agencies or universities (among others the 

New Mexico State University: https://newscenter.nmsu.edu/Articles/view/10208/nmsu-uas-flighttest-center-conducts-ebee-airworthiness-assessment, and the USACE New Orleans, who 

coordinated with the Department of Army and the FAA to obtain all authorizations required in 

order to operate the eBee UAS). Moreover the eBee already received 15 Exemptions from the 

FAA. 
SenseFly also obtained flight approvals for the eBee (delivered by national civil aviation 

authorities) in many countries, among others: 

• Switzerland (flight approval for VLOS operations) 

• Canada (flight approval for VLOS operations) 

• Australia (flight approval for VLOS operations) 

• France (flight approval for Extended-VLOS operations) 

• Germany (flight approval for VLOS operations) 

• United Kingdom (flight approval for VLOS operations) 

• Norway (flight approval for VLOS operations) 

• Sweden (flight approval for VLOS operations) 

• Denmark (flight approval for VLOS operations) 

b. Operating requirements 

Grant of the exemption to WCMC for the eBee will be subject to the following operating 

conditions: 

• 1. Operations authorized by this grant of exemption are limited to the SenseFly eBee when 

weighing less than 55 pounds including payload. Proposed operations of any other aircraft 

will require a new petition or a petition to amend this exemption. 

• 2. Operations for the purpose of closed-set motion picture and television filming are not 

permitted. 

• 3. The UA may not be operated at a speed exceeding 87 knots (100 miles per hour). The 

exemption holder may use either groundspeed or calibrated airspeed to determine 

compliance with the 87 knot speed restriction. In no case will the UA be operated at 

airspeeds greater than the maximum UA operating airspeed recommended by the aircraft 

manufacturer. 

• 4. The UA must be operated at an altitude of no more than 400 feet above ground level 

(AGL). Altitude must be reported in feet AGL. 

• 5. The UA must be operated within visual line of sight (VLOS) of the PIC at all times. 

This requires the PIC to be able to use human vision unaided by any device other than 

corrective lenses, as specified on the PIC’s FAA-issued airman medical certificate or U.S. 

driver’s license. 

• 6. All operations must utilize a visual observer (VO). The UA must be operated within the 

visual line of sight (VLOS) of the PIC and VO at all times. The VO may be used to satisfy 

the VLOS requirement as long as the PIC always maintains VLOS capability. The VO and 

PIC must be able to communicate verbally at all times; electronic messaging or texting is 

not permitted during flight operations. The PIC must be designated before the flight and 

cannot transfer his or her designation for the duration of the flight. The PIC must ensure 

that the VO can perform the duties required of the VO. 

• 7. This exemption and all documents needed to operate the UAS and conduct its 

operations in accordance with the conditions and limitations stated in this grant of 

exemption, are hereinafter referred to as the operating documents. The operating 
documents must be accessible during UAS operations and made available to the 

Administrator upon request. If a discrepancy exists between the conditions and limitations 

in this exemption and the procedures outlined in the operating documents, the conditions 

and limitations herein take precedence and must be followed. Otherwise, the operator 

must follow the procedures as outlined in its operating documents. The operator may 

update or revise its operating documents. It is the operator’s responsibility to track such 

revisions and present updated and revised documents to the Administrator or any law 

enforcement official upon request. The operator must also present updated and revised 

documents if it petitions for extension or amendment to this grant of exemption. If the 

operator determines that any update or revision would affect the basis upon which the 

FAA granted this exemption, then the operator must petition for an amendment to its grant 

of exemption. The FAA’s UAS Integration Office (AFS-80) may be contacted if questions 

arise regarding updates or revisions to the operating documents. 

• 8. Any UAS that has undergone maintenance or alterations that affect the UAS operation 

or flight characteristics, e.g. replacement of a flight critical component, must undergo a 

functional test flight prior to conducting further operations under this exemption. 

Functional test flights may only be conducted by a PIC with a VO and must remain at 

least 500 feet from other people. The functional test flight must be conducted in such a 

manner so as to not pose an undue hazard to persons and property. 

• 9. The operator is responsible for maintaining and inspecting the UAS to ensure that it is 

in a condition for safe operation. 

• 10. Prior to each flight, the PIC must conduct a pre-flight inspection and determine the 

UAS is in a condition for safe flight. The pre-flight inspection must account for all 

potential discrepancies, e.g. inoperable components, items, or equipment. If the inspection 

reveals a condition that affects the safe operation of the UAS, the aircraft is prohibited 

from operating until the necessary maintenance has been performed and the UAS is found 

to be in a condition for safe flight. 

• 11. The operator must follow the UAS manufacturer’s maintenance, overhaul, 

replacement, inspection, and life limit requirements for the aircraft and aircraft 

components. 

• 12. Each UAS operated under this exemption must comply with all manufacturer safety 

bulletins. 

• 13. Under this grant of exemption, a PIC must hold either an airline transport, commercial, 

private, recreational, or sport pilot certificate. The PIC must also hold a current FAA 

airman medical certificate or a valid U.S. driver’s license issued by a state, the District of 

Colombia, Puerto Rico, a territory, a possession, or the Federal government. The PIC must 

also meet the flight review requirements specified in 14 CFR § 61.56 in an aircraft in 

which the PIC is rated on his or her pilot certificate. 

• 14. The operator may not permit any PIC to operate unless the PIC demonstrates the 

ability to safely operate the UAS in a manner consistent with how the UAS will be 

operated under this exemption, including evasive and emergency maneuvers and 

maintaining appropriate distances from persons, vessels, vehicles and structures. PIC 

qualification flight hours and currency must be logged in a manner consistent with 14 

CFR § 61.51(b). Flights for the purposes of training the operator’s PICs and VOs 
(training, proficiency, and experience-building) and determining the PIC’s ability to safely 

operate the UAS in a manner consistent with how the UAS will be operated under this 

exemption are permitted under the terms of this exemption. However, training operations 

may only be conducted during dedicated training sessions. During training, proficiency, 

and experience-building flights, all persons not essential for flight operations are 

considered nonparticipants, and the PIC must operate the UA with appropriate distance 

from nonparticipants in accordance with 14 CFR § 91.119. 

• 15. UAS operations may not be conducted during night, as defined in 14 CFR § 1.1. All 

operations must be conducted under visual meteorological conditions (VMC). Flights 

under special visual flight rules (SVFR) are not authorized. 

• 16. The UA may not operate within 5 nautical miles of an airport reference point (ARP) as 

denoted in the current FAA Airport/Facility Directory (AFD) or for airports not denoted 

with an ARP, the center of the airport symbol as denoted on the current FAA- published 

aeronautical chart, unless a letter of agreement with that airport’s management is obtained 

or otherwise permitted by a COA issued to the exemption holder. The letter of agreement 

with the airport management must be made available to the Administrator or any law 

enforcement official upon request. 

• 17. The UA may not be operated less than 500 feet below or less than 2,000 feet 

horizontally from a cloud or when visibility is less than 3 statute miles from the PIC. 

• 18. If the UAS loses communications or loses its GPS signal, the UA must return to a predetermined location within the private or controlled-access property. 

• 19. The PIC must abort the flight in the event of unpredicted obstacles or emergencies. 

• 20. The PIC is prohibited from beginning a flight unless (considering wind and forecast 

weather conditions) there is enough available power for the UA to conduct the intended 

operation and to operate after that for at least five minutes or with the reserve power 

recommended by the manufacturer if greater. 

• 21. Air Traffic Organization (ATO) Certificate of Waiver or Authorization (COA). All 

operations shall be conducted in accordance with an ATO-issued COA. The exemption 

holder may apply for a new or amended COA if it intends to conduct operations that 

cannot be conducted under the terms of the attached COA. 

• 22. All aircraft operated in accordance with this exemption must be identified by serial 

number, registered in accordance with 14 CFR part 47, and have identification (NNumber) markings in accordance with 14 CFR part 45, Subpart C. Markings must be as 

large as practicable. 

•

• 23. Documents used by the operator to ensure the safe operation and flight of the UAS and 

any documents required under 14 CFR §§ 91.9 and 91.203 must be available to the PIC at 

the Ground Control Station of the UAS any time the aircraft is operating. These 

documents must be made available to the Administrator or any law enforcement official 

upon request. 

• 24. The UA must remain clear and give way to all manned aviation operations and 

activities at all times. 
• 25. The UAS may not be operated by the PIC from any moving device or vehicle. 

• 26. All Flight operations must be conducted at least 500 feet from all nonparticipating 

persons, vessels, vehicles, and structures unless: 

• a. Barriers or structures are present that sufficiently protect nonparticipating persons from 

the UA and/or debris in the event of an accident. The operator must ensure that 

nonparticipating persons remain under such protection. If a situation arises where 

nonparticipating persons leave such protection and are within 500 feet of the UA, flight 

operations must cease immediately in a manner ensuring the safety of nonparticipating 

persons; and 

• b. The owner/controller of any vessels, vehicles or structures has granted permission for 

operating closer to those objects and the PIC has made a safety assessment of the risk of 

operating closer to those objects and determined that it does not present an undue hazard. 

The PIC, VO, operator trainees or essential persons are not considered nonparticipating 

persons under this exemption. 

• 27. All operations shall be conducted over private or controlled-access property with 

permission from the property owner/controller or authorized representative. Permission 

from property owner/controller or authorized representative will be obtained for each 

flight to be conducted. 

• 28. Any incident, accident, or flight operation that transgresses the lateral or vertical 

boundaries of the operational area as defined by the applicable COA must be reported to 

the FAA's UAS Integration Office (AFS-80) within 24 hours. Accidents must be reported 

to the National Transportation Safety Board (NTSB) per instructions contained on the 

NTSB Web site: www.ntsb.gov. 

3. CONCLUSION

Overall, UAV technology offers a more efficient, cost-effective data collection method to the 

mining, construction and agricultural industries. Utilizing the eBee will allow WCMC to gather 

data for mine planning that will save money and increase workflow efficiency. Furthermore, the 

unmanned aspect decreases the risk of placing employees in hazardous conditions often required 

by traditional data collection devices. 

WCMC, in association with SenseFly, who has experience with safe integration of unmanned 

aircraft in the National airspace, has hopefully provided an adequate justification for the grant of 

the exemption allowing use of the eBee for data collection and customer training. 

Please do not hesitate to contact me if you have any questions. 

Yours sincerely, 

Jason Buenemann, PE WY 11556 

Engineering Manager, Walnut Creek Mine 
ANNEX A: EXEMPTION REQUEST AND EQUIVALENT LEVEL OF SAFETY 

SHOWINGS UNDER APPLICABLE RULES SUBJECT TO EXEMPTION

WCMC requests an exemption from the following regulations as well as any additional 

regulations that may technically apply to the operation of the eBee: 

14 C.F.R. Part 21, Subpart H: Airworthiness Certificates 

14 CFR § 91.203(a)(1) 

Section 91.203 requires all civil aircraft to have a certificate of airworthiness. Part 21, Subpart H,

entitled Airworthiness Certificates, establishes the procedural requirements for the issuance of 

airworthiness certificates as required by FAR § 91.203(a). Given the size of the eBee, its very 

light weight (the maximum take-off weight is 1.7 pounds) and the limited operating area 

associated with its utilization, it is unnecessary to go through the certificate of airworthiness 

process under Part 21 Subpart H in order to achieve or exceed current safety levels. 

Such an exemption meets the requirements of an equivalent level of safety under Part 11 and 

Section 333 of the Reform Act. The Federal Aviation Act and Section 333 of the Reform Act both 

authorize the FAA to exempt aircraft from the requirement for an airworthiness certificate, upon 

consideration of the size, weight, speed, operational capability, and proximity to airports and 

populated areas of the UAS involved. An analysis of these different criteria demonstrates that the 

eBee operated without an airworthiness certificate, under the conditions proposed in that 

exemption, will be at least as safe, or safer, than a conventional aircraft with an airworthiness 

certificate. A proprietary risk assessment for operations with the eBee, which demonstrates that 

assertion, is also being submitted to the FAA as part of this application. WCMC requests the FAA 

treat the eBee risk assessment as proprietary under 14 C.F.R. 11.35(b) and not include this 

document in the public docket. 

14 C.F.R. § 61.3: Requirements for certificates, ratings and authorizations 

14 C.F.R. § 61.113(a) & (b); 61.133(a): Private Pilot Privileges and Limitations; Pilot in 

Command; Commercial Pilot Privileges and Limitations 

The regulation provides that no person may serve as a required pilot flight crewmember of a civil 

aircraft of the United States, unless that person: 

(1) Has a pilot certificate or special purpose pilot authorization issued under this part in that 

person's physical possession or readily accessible in the aircraft when exercising the privileges of 

that pilot certificate or authorization. However, when the aircraft is operated within a foreign 

country, a pilot license issued by that country may be used. 

The regulation provides also that no person that holds a private pilot certificate may act as pilot in

command of an aircraft for compensation or hire. Subparagraph (b) allows a private pilot to act as 

pilot in command of an aircraft in connection with any business or employment if: 

(1) The flight is only incidental to that business or employment; 

(2) The aircraft does not carry passengers or property for compensation or hire. 

Given the safety features of the eBee and the fact that the missions are pre-programmed and 

monitored in real-time with a specific flight management software (eMotion), SenseFly proposes 

that operators of the eBee should not be required to hold a commercial pilot certification. Instead, 
operators should be required to: 

• Possess a sport pilot certificate 

• Possess a valid state driver’s license 

• Successfully passed a manufacturer’s training program for the eBee; WCMC request the 

FAA treat the eBee training program as proprietary under 14 C.F.R 11.35(b) and does not 

include this document in the public docket. 

14 C.F.R. § 91.7(a): Civil aircraft airworthiness

This regulation requires that no person may operate a civil aircraft unless it is in airworthy 

condition. Should the exemption be granted allowing commercial operation of the eBee without 

an airworthiness certificate, no standard will exist for airworthiness of the eBee. Given the size of 

the aircraft and the previous airworthiness assessments given to the eBee, among others: 

• New Mexico State University: https://newscenter.nmsu.edu/Articles/view/10208/nmsuuas-flight-test-center-conducts-ebee-airworthiness-assessment

• USACE New Orleans, who coordinated with the Department of Army and the FAA to 

obtain all authorizations required in order to operate the eBee UAS for levee system 

monitoring, documentation of construction progress, and extensive oblique photography 

of USACE structures & activities 

An equivalent level of safety will be achieved by insuring compliance with the SenseFly manuals 

prior to each flight. 

14 CFR § 91.119: Minimum Safe Altitudes

The regulation provides that over sparsely populated areas the aircraft cannot be operated closer 

than 500 feet to any person, vessel, vehicle, or structure. Since the aircraft will be operating at a 

maximum of 400 feet AGL, the eBee cannot comply with this requirement. 

The equivalent level of safety will be achieved because the eBee will only fly over private mine 

property. The operator will define before every flight a working area radius and a flight area 

ceiling, preventing the eBee to go beyond the flight area. The landowner and the persons who 

may be on the ground in the flight area will be briefed of the expected route of flight and the 

associated risks to persons and property on the ground. Due to the small size of the eBee and the 

material with which the eBee is built, the hazard to persons, vessels, vehicles, and structures is not

comparable to manned aircraft and should be considered in granting the exemption. 

Moreover, the aircraft will not be operated over congested areas nor over any open-air assembly 

of persons. The aircraft will be operated at an altitude allowing, if a power unit fails, an 

emergency landing without undue hazard to persons or property on the surface. 

14 C.F.R. § 91.151(a): Fuel Requirements for Flight in VFR Conditions

The regulation provides that no person may begin a flight in an airplane under day-VFR 

conditions unless there is enough fuel to fly to the first point of intended landing and to fly after 

that for at least 30 minutes. 
Given the area of operation for the eBee, WCMC believes that an equivalent level of safety is 

already achieved with the specific procedure preventing the eBee to accept a take-off order is the 

battery level is below a given value. Moreover, SenseFly has integrated “low” and “critical” 

battery level warnings and implemented a “return to Home” (and “Go Land”) actions in these 

situations. 

14 CFR Subpart E (91.401 - 91.417) - Maintenance, Preventive Maintenance, and 

Alterations

The regulation provides that the operator is primarily responsible for maintaining the aircraft in an 

airworthy condition, including compliance with Parts 39 and 43. Paragraphs 91.407 and 91.409 

require that the aircraft be "approved for return to service by a person authorized under 43.7" after 

maintenance and inspection. Section 91.409(a)(2) requires an annual inspection for the issuance 

of an airworthiness certificate. Section 91.417(a) requires the owner or operator to keep records 

showing certain maintenance work that has been accomplished by certificated mechanics, under 

Part 43, or licensed pilots and records of approval of the aircraft for return to service. 

WCMC proposes that the maintenance of the eBee will be accomplished by the owner/operator 

according to the maintenance manual, provided by SenseFly. WCMC requests the FAA treat the 

eBee training program as proprietary under 14 C.F.R. 11.35(b) and not include this document in 

the public docket. 

An equivalent level of safety will be achieved because the eBee is small in size, it is not a 

complex mechanical device, it will carry no external payload, and it will operate only in restricted 

predetermined areas. Moreover, the operator is the person most familiar with the aircraft and is 

best suited to maintain the aircraft in an airworthy condition and to ensure an equivalent level of 

safety. Finally, before every flight, the eBee runs automatically a sequence of pre-flight tests to 

make sure that every sensor and every critical part is running properly. If a problem is detected, 

the eBee will not be able to be switched-on and a message error is displayed on the main screen of 

the flight management software. The operator can then refer to the maintenance manual to 

troubleshoot this issue. Several parts of the eBee are easily interchangeable (propellers, wings), 

which allows the operator to make sure the wings and propulsion system are always airworthy 

when a mission is initiated.