HomeMy WebLinkAbout1.05 Sound, Traffic, Cultural studySound Survey
Grand River Gathering LLC
High Mesa Compressor Station
OA Project No. 012-0732
826 21 ½ Road | Grand Junction, CO 81505 | TEL 970.263.7800 | FAX 970.263.7456
HOOVER & KEITH INC.
ACOUSTICS & NOISE CONTROL ENGINEERING
TX Office: 11391 Meadowglen, Suite D, Houston, TX 77082
CO Office: 1680 Northwestern Rd, Longmont, CO 80503
CO Phone: 303-834-9455 TX Phone: 281-496-9876
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Subject: Encana High Mesa Compressor Station (Garfield County, Colorado):
Results of a Sound Survey during Operation of the Station
Submitted to: Encana Oil & Gas (USA) Inc.
Denver, CO 80944
H&K Report No. 2701
Date of Report: March 20, 2012
H&K Job No. 4489
Submitted by: Paul D. Kiteck, P.E., Hoover & Keith Inc.
REPORT SUMMARY
This report presents the results of a sound survey performed Feb. 22, 2012 at the High Mesa
Station (abbreviated as “Station”). The purpose of the sound survey was to quantify the sound
levels during Station operation and compare the sound contribution of the Station to the
applicable sound level requirement(s). The following table summarizes the measured daytime A-
wt. sound levels at the surrounding (“closest”) residences during Station operation.
Measured Daytime A-Wt. Sound Levels at the Closest Residences during Station Operation
Description of Surrounding Residences and Sound Measurement Location Meas’d A-Wt. Sound Level
Near residences located between approx. 4,200 ft. to 5,000 ft. west/NW of Station 45.1 dBA*
Near residences along CR 306 located approx. 5,500 feet SW of the Station 37.6 dBA*
*Meas’d sound data (A-wt. sound levels) also includes background (ambient) noise (i.e., noise not associated with the
Station operation). Consequently, the sound contribution due only to Station is lower than the reported sound levels.
The following table summarizes the measured A-wt. sound levels at 350 feet from the Station
(i.e., sound measurement position at 350 feet in each cardinal direction of the Station).
Measured A-Wt. Sound Levels at 350 ft. in each Cardinal Direction during Station Operation
Pos. Description of the Sound Measurement Location Meas’d A-Wt. Sound Level
Pos. 1 350 feet NW of the Station site center (i.e., location of compressor units) 65.7 dBA
Pos. 2 350 feet NE of the Station site center (i.e., location of compressor units) 64.3 dBA
Pos. 3 350 feet SE of the Station site center (i.e., location of compressor units) 60.2 dBA
Pos. 4 350 feet SW of the Station site center (i.e., location of compressor units) 51.6 dBA
In summary, the results of the sound survey indicate that the Station sound levels are slightly
above or below the sound level limits specified in the COGCC “Aesthetic and Noise Control
Regulations” for “light industrial” zoned property (i.e., daytime level of 70 dBA and nighttime level
of 65 dBA at 350 feet from the Station). This conclusion assumes that the Station is considered
to be in a remote location (i.e., there are no reasonably proximate occupied structures).
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
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TABLE OF CONTENTS
Page
1.0 INTRODUCTION............................................................................................................................ 1
2.0 SITE/FACILITY DESCRIPTION .................................................................................................... 1
3.0 SOUND LEVEL REQUIREMENT(S) ............................................................................................. 1
3.1 Discussion of the COGCC Noise Regulations .............................................................. 1-2
3.2 Discussion of the CO State Noise Regulations ................................................................ 2
4.0 MEASUREMENT LOCATIONS, CONDITIONS AND MEASUREMENT METHODOLOGY ........ 3
4.1 Sound Measurement Positions and Conditions during the Sound Survey ....................... 3
4.2 Data Acquisition and Sound Measurement Equipment ................................................ 3-4
5.0 MEASUREMENT RESULTS, OBSERVATIONS AND FINAL COMMENT .................................. 4
5.1 Measurement Results ....................................................................................................... 4
5.2 Observations and Final Comment .................................................................................... 5
APPENDIX: SITE/FACILITY DRAWINGS, SUMMARY OF THE MEASUREMENT
RESULTS AND ANY SUBSEQUENT SOUND DATA CALCULATIONS ................. 6-15
Figure 1: Area Layout around the Station showing Location of Surrounding Residences,
Chosen Sound Measurement Positions and other Areas of Interest ............................ 7
Figure 2: Layout showing Station Buildings/Piping/Equipment and the Chosen Sound
Measurement Positions around the Station Property .................................................... 8
Table A: Measured A-Wt. Sound Levels and Unweighted O.B. SPLs at all Reported
Sound Measurement Positions during Operation of the Station .................................... 9
Table B: Meteorological Conditions during the Site Sound Survey .............................................. 9
COGCC Noise Requirements (Rules and Regulations) ................................................... 10-12
Summary of Typical Metrics for Regulating Environmental Noise and Acoustical
Terminology related to the Report ..................................................................................... 13-15
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
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1.0 INTRODUCTION
In this report, Hoover & Keith Inc. (“H&K”) presents the results of a sound survey performed on
Feb. 22, 2012 during normal operation of the Encana High Mesa Station (abbreviated as
“Station” in the report). The purpose of the sound survey was to quantify the sound level
attributable to the Station during typical operation of the Station and compare the resulting sound
level contribution of the Station to the applicable sound level requirement(s).
2.0 SITE/FACILITY DESCRIPTION
Figure 1 (Appendix, p. 7) provides an area layout around the Station showing the surrounding
(“closest”) residences along with the chosen sound measurement positions near the surrounding
residences and at 350 feet around the Station, noting that the existing topography is not shown
on this figure/drawing. The Station is located in Garfield County, Colorado off County Road 300
(“CR-300”), in the area referred to as “High Mesa”. The Station is approximately 3 miles south of
Parachute, CO. The land immediately around the Station is primarily utilized as industrial
activities (e.g., oil & gas type operations), and assumed to be classified as “light industrial” zoned
property, noting that there is a “water plant” located on the North Side of the Station. The closest
residences (i.e., “residential/agricultural/rural” zoned properties) are located west, northwest and
southwest of the Station at a distance of between 4,200 feet to 5,500 feet from the Station.
Figure 2 (Appendix, p. 8) provides a layout of the Station showing the equipment (i.e., location
of compressor units) along with the chosen sound measurement positions around the Station
property. The Station consist of seven (7) CAT Model 3516 (unenclosed) skid-mounted engine-
driven reciprocating compressor units (i.e., Units #1– #7) and one (1) CAT Model 3616 engine-
driven reciprocating compressor unit (i.e., Unit #8) that is located inside a building.
3.0 SOUND LEVEL REQUIREMENT(S) AND ACOUSTICAL TERMINOLOGY
For the reader’s information, a summary of applicable acoustical terminology in this report and
typical metrics used to measure and regulate environmental noise is provided at the end of the
report (Appendix, pp. 13–15).
3.1 Discussion of the COGCC Noise Regulations
The Colorado Oil and Gas Conservation Committee (“COGCC”) regulate the oil and gas drilling
and production industry in the State of Colorado and the mission of the COGCC is to promote the
responsible development of Colorado’s oil and gas natural resources. The COGCC has the
responsibility for regulating noise from natural gas facilities in Colorado, and Series 800 (i.e.,
“Aesthetic and Noise Control Regulations”; Section 801 and Section 802) of the COGCC Rules
and Regulations address noise requirements (i.e., maximum allowable noise levels) for natural
gas gathering facilities, such as the High Mesa Station. The complete noise regulations given in
the COGCC Rules and Regulations are provided toward the end of the report (Appendix, pp.
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
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10–12). The following summarizes our interpretation of the noise requirements of the COGCC as
applied to the High Mesa Station:
Where there is no reasonably proximate occupied structure or designated outside activity
area and there are no noise complaints from a nearby property owner regarding noise
related to oil and gas operations, which appears to be the case with the High Mesa
Station, the “light industrial standard” may be applicable. Consequently, the Station
noise level should not exceed an A-weighted (“A-wt.”) sound level of 70 dBA (daytime)
and 65 dBA (nighttime) at 350 feet from the Station site center (i.e., area of the noise
source, which is the area of the compressor equipment/units).
If the property adjacent to the Station property line is zoned “agricultural & rural” and/or
there are noise complaints from a nearby property owner or a local governmental
designee, the Station noise contribution at 350 feet from the site center should not
exceed an A-weighted (“A-wt.”) sound level of 55 dBA (daytime) and 50 dBA (nighttime).
3.2 Discussion of CO State Noise Regulations
There are State of Colorado noise-related regulations (i.e., Colorado State Statute 25-12-
102/103) that could be applicable, although in our opinion, the noise regulations of the COGCC
are more stringent than the CO State Statute regulations. The noise regulations of the CO State
Statute is a maximum A-weighted (A-wt.) sound level due to the operation of the facility at a
distance of 25 feet or more from the property line of the applicable land use category, as given in
Table 1 below.
Zone or Land
Use Category
7:00 AM to 7:00
PM (Daytime)
7:00 PM to 7:00
AM (Nighttime)
Metric Sound Measurement Location
Residential 55 dBA 50 dBA A-wt. sound level 25 feet or more from property line
Commercial 60 dBA 55 dBA A-wt. sound level 25 feet or more from property line
Light Industrial 70 dBA 65 dBA A-wt. sound level 25 feet or more from property line
Industrial 80 dBA 75 dBA A-wt. sound level 25 feet or more from property line
Table 1: Summary of the Sound Level Requirements as given in the Colorado State Statute
The land adjacent to the east, north and west property line of the Station is zoned A-1 Agricultural
Land, and based on our interpretation of the regulations, agricultural land is classified as a “light
industrial” land usage. Consequently, if the noise regulations in the State Statute are applicable,
the noise radiated at 25 feet from the property line of the Station should not exceed a nighttime A-
wt. sound level of 65 dBA (i.e., most stringent requirement). At land that is zoned Residential
Rural (i.e., “residential” land usage), if the noise regulations in the State Statute are applicable,
noise radiated at 25 feet from the residential property line should not exceed a nighttime A-wt.
sound level of 50 dBA (i.e., most stringent requirement). In addition, activity at the Station shall
be conducted in a manner so that noise produced is not objectionable due to intermittence, beat
frequency or shrillness.
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
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4.0 MEASUREMENT LOCATIONS, CONDITIONS AND MEASUREMENT METHODOLOGY
4.1 Sound Measurement Positions and Conditions during the Sound Survey
Two (2) locations were chosen for measuring the sound level near the surrounding (“closest”)
residences around the Station. Other sound measurements were conducted at 350 feet in each
cardinal direction from the Station/equipment and at locations around the Station property. The
following provides a description of the reported sound measurement positions and the
surrounding “closest” residences.
Pos. 1: 350 Ft. NW of the Station equipment (i.e., “North Side” of the Station);
Pos. 2: 350 Ft. NE of the Station equipment (i.e., “East Side” of the Station);
Pos. 3: 350 Ft. SE of the Station equipment (i.e., “South Side” of the Station);
Pos. 4: 350 Ft. SW of the Station equipment (i.e., “West Side” of the Station);
Pos. 5: West fenceline of the Station/site, at the “alternative” Station entrance gate;
Pos. 6: North fenceline of the Station/site, at the “main” Station entrance gate;
Pos. 7: South of the Station/site, in line with Unit #5 and Unit #6;
Pos. 8: Near the closest residences that are west and northwest (“NW”) of the Station, located
between approximately 4,200 and 5,000 feet from the Station acoustic center (i.e.,
location of the compressor units), noting that residences in this area are not in line-of-
sight of the Station due to the existing topography;
Pos. 9: Near the closest residences that are southwest (“SW”) of the Station, and these
residences are located along CR-306 (i.e., Spring Creek Road), approximately 5,500 feet
from the Station; Note that these residences along the East Side of Spring Creek Road
are in line-of-sight of the Station.
The sound survey was performed by Paul Kiteck of H&K during the daytime of Feb. 22, 2012.
During the sound survey, the temperature was approximately 48 to 50o F.; the sky was mostly
cloudy and the wind was blowing primarily from the south/SW. The operating conditions of the
Station units during the sound survey are summarized on Table A (Appendix, p. 9).
4.2 Data Acquisition and Measurement Equipment
At each sound measurement location, the A-wt. sound levels and the unweighted octave-band
(“O.B.”) sound pressure levels (“SPLs”) were measured at approximately four (4) feet above
ground. The sound measurements were taken during times when the wind was less than five (5)
mph, if feasible. The sound measurement system consisted of a Larson-Davis (LD) Model 2900
Real Time Analyzer/SLM (a Type I SLM per ANSI Standard S1.4 & S1.11) with a 1/2-in. LD
condenser microphone covered by a windscreen, and the analyzer/SLM was calibrated with a LD
Model CA250 microphone calibrator that was calibrated within one (1) year of the testing date.
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
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5.0 MEASUREMENT RESULTS, OBSERVATIONS AND FINAL COMMENT
5.1 Measurement Results
Table A (Appendix, p. 9) shows the measured A-wt. sound levels and the unweighted O.B.
SPLs at all sound measurement positions during operation of the Station along with a summary
of the operating conditions of the Station equipment/units during the survey. Meteorological
conditions that occurred during the sound survey are summarized in Table B (Appendix, p. 9).
The following Table 2 summarizes the measured A-wt. sound levels during the sound survey
during Station operation, noting that the measured A-wt. sound levels at these “residential” sound
measurement positions included significant existing background noise (i.e., Station noise was not
the most dominant noise source).
Meas.
Pos.
Description of the Surrounding (Closest) Residences and the
Sound Measurement Location
Meas’d A-Wt.
Sound Level
Pos. 8 Near residences located between 4,200 ft. to 5,000 ft. west/NW of the Station 45.1 dBA
Pos. 9 Near residences located approximately 5,500 feet SW of the Station 37.6 dBA
Table 2: Summary of the Meas’d A-Wt. Sound Levels at the Closest Residences surrounding the Station
The following Table 3 summarizes the measured A-wt. sound levels at 350 feet from the Station
(i.e., sound measurement position in each cardinal direction from the Station equipment). These
sound measurement positions are presumed to represent suitable sound monitor positions for
qualifying the sound level around the Station property line in accordance with the COGCC, if
applicable.
Meas.
Pos.
Description of the Sound Measurement Location Meas’d A-Wt.
Sound Level
Pos. 1 350 feet NW of the Station site center (i.e., location of the compressor units) 65.7 dBA
Pos. 2 350 feet NE of the Station site center (i.e., location of the compressor units) 64.3 dBA
Pos. 3 350 feet SE of the Station site center (i.e., location of the compressor units) 60.2 dBA
Pos. 4 350 feet SW of the Station site center (i.e., location of the compressor units) 51.6 dBA
Table 3: Summary of the Meas’d A-Wt. Sound Levels at 350 Ft. from the Station Equipment
In summary, the results of the sound survey indicate that the Station sound levels are slightly
above or below the sound level limits specified in the COGCC “Aesthetic and Noise Control
Regulations” for “light industrial” zoned property (i.e., daytime level of 70 dBA and nighttime level
of 65 dBA at 350 feet from the Station). This conclusion assumes that the Station is considered
to be in a remote location (i.e., there are no reasonably proximate occupied structures).
Regarding the Colorado State Statute, the results of the sound survey indicate that the Station
sound level is equal to or below the sound level limits specified in the Colorado State Statute for
an adjacent industrial use area (i.e., nighttime A-wt. sound level or Leq of 65 dBA) and at
surrounding residences (i.e., 50 dBA at 25 feet from the residential property line).
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
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5.2 Observations and Final Comment
At the residences located west/NW of the Station, noise associated with the Station was not
really audible during the sound survey, and the noise of distant vehicle traffic along Interstate 70
was the primary noise contributor to the measured A-wt. sound levels along with the noise
associated with another oil/gas facility located relatively close to these residences. At the
residences located southwest of the Station (i.e., along Spring Creek Road), which are in line-of-
sight of the Station, the noise generated by the Station was audible but not the dominant noise
source. The A-wt. sound levels at these residences SW of the Station were primarily a results of
the noise of distant traffic along Interstate 70. At the sound measurement positions around the
fenceline and property of the Station (i.e., Meas. Pos. 1, 2, 3, 4, 5, 6 & 7), the noise of the Station
was the most dominant noise source, which would be expected since the primary equipment at
the Station consist of unenclosed skid-mounted engine-driven compressor units.
This concludes the results of the sound survey at the High Mesa Station. The measured sound
levels around the Station (e.g., sound levels at 350 feet from the Station equipment/units) would
be slightly higher than the measured levels if all compressor units were operating although we
understand that the operating conditions that occurred during this recent sound survey is typical
for this facility.
file: ProjWord\Encana\High Mesa Station\Report – Results of a Sound Survey at Encana High Mesa Station.doc
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
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APPENDIX
FIGURE 1: AREA LAYOUT AROUND THE STATION
SHOWING THE SURROUNDING
RESIDENCES, OTHER AREAS OF
INTEREST AND CHOSEN SOUND
MEASUREMENT POSITIONS NEAR THE
RESIDENCES AND AT 350 FT. AROUND
THE STATION
FIGURE 2: STATION LAYOUT SHOWING BUILDINGS
AND EQUIPMENT ALONG WITH CHOSEN
SOUND MEASUREMENT POSITIONS
AROUND THE STATION PROPERTY
SUMMARY OF THE MEASURED SITE SOUND DATA
AND ANY SUBSEQUENT DATA CALCUATIONS
COLORADO OIL & GAS CONSERVATION COMMISSION
(COGCC) NOISE REQUIREMENTS
SUMMARY OF TYPICAL METRICS FOR REGULATING
ENVIRONMENTAL NOISE AND ACOUSTICAL
TERMINOLOGY RELATED TO THE REPORT
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
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Figure 1: Encana High Mesa Station: Area Layout showing the Surrounding Residences, other
Areas of Interest, and the Chosen Sound Measurement Positions near the Residences
and at 350 Feet around the Station Site (Existing Topography not Shown).
APPROXIMATE SCALE IN FEET
0 1900950 3800
- HOUSE OR MOBILE HOME
- NOISE SENSITIVE AREANSA
LEGEND
- NONRESIDENTIAL BUILDING
- MEASUREMENT POSITION
N
HIGH
MESA
STATION
POS. 8
POS. 9
5500'
5000'
4200'
CR 306
(SPRING CREEK
RD.)
UNDERGROUND
PIPELINE
WATER
PLANT
CR 300
(PARACHUTE -
UNA RD.)
POS. 4
(350' FROM
COMPR.
UNITS)
POS. 1
(350' FROM
COMPR.
UNITS)
POS. 2
(350' FROM
COMPR.
UNITS)
POS. 3
(350' FROM
COMPR.
UNITS)
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
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Figure 2: Encana High Mesa Station: Layout showing the Station Equipment/Building and Chosen
Sound Measurement Positions around the Station Property.
APPROXIMATE SCALE IN FEET
8040 160
LEGEND
0
- MEASUREMENT POSITION
NOISE
BARRIER
NOISE
BARRIER
1 2 3
4567
CONTROL
BUILDING
UNIT #8
IN BLDG.
MAIN
STATION
ENTRANCE
GATE
FENCELINE
POS. 5
POS. 7
100'
POS. 6
HIGH MESA
STATION
PLANT
NORTH
TRUE
NORTH
ACCESS
ROAD
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
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Measurement Set Time Sound Pressure Level (SPL) in dB per Octave Band Freq (Hz)A-Wt.Comments & Observations
Pos.Description/Location of Test 31.5 63 125 250 500 1000 2000 4000 8000 Level
1 Approx. 350 ft. NW of the 3:30 PM 73 75 70 61 58 60 57 54 58 65.2 Station noise was dominant noise
compressor site 3:35 PM 74 75 70 62 60 61 58 56 59 66.3 source, as would be expected.
Average SPLs & A-Wt. Sound Level 74 75 70 62 59 61 58 55 59 65.7
2 Approx. 350 ft. NE of the 3:42 PM 73 72 68 61 57 61 57 53 50 64.5 Station noise was dominant noise
compressor site 3:45 PM 74 72 68 61 58 60 57 53 50 64.1 source.
Average SPLs & A-Wt. Sound Level 74 72 68 61 57 61 57 53 50 64.3
3 Approx. 350 ft. SE of the 3:52 PM 78 75 69 60 52 54 54 46 36 60.3 Station noise was dominant noise
compressor site 3:55 PM 76 76 70 60 52 53 53 46 35 60.1 source.
Average SPLs & A-Wt. Sound Level 77 75 69 60 52 53 53 46 35 60.2
4 Approx. 350 ft. SW of the 4:00 PM 70 67 59 51 46 44 42 38 36 51.1 Station noise was dominant noise
compressor site 4:05 PM 70 67 59 51 46 46 46 40 32 52.3 source, but noticably less station noise
Average SPLs & A-Wt. Sound Level 70 67 59 51 46 45 44 39 34 51.6 on this side of station.
5 West fenceline of station,4:10 PM 77 77 78 70 66 64 62 60 55 70.4 Station noise was dominant noise
at alternate station entrance 4:12 PM 76 78 78 70 66 63 62 60 55 70.2 source, as would be expected.
Average SPLs & A-Wt. Sound Level 77 78 78 70 66 63 62 60 55 70.3
6 North fenceline of station, at 4:15 PM 78 81 76 71 68 67 65 64 73 75.3 Station noise was dominant noise
main station entrance gate 4:18 PM 78 81 76 72 68 67 65 65 74 76.0 source.
Average SPLs & A-Wt. Sound Level 78 81 76 71 68 67 65 64 74 75.6
7 South Side of station, in line 4:25 PM 86 83 79 74 71 66 65 61 55 73.4 Station noise was dominant noise
with Units #5 & #6 4:28 PM 86 83 79 74 71 66 65 61 55 73.4 source but noise of Unit #8 was not
Average SPLs & A-Wt. Sound Level 86 83 79 74 71 66 65 61 55 73.4 significant (i.e., unit in a building).
8 Near the closest residences 5:00 PM 60 57 55 45 42 42 34 29 29 46.2 Noise of station not audible; Audible
west/NW of station 5:10 PM 62 57 54 42 40 39 33 25 21 44.2 sound sources include distant I-70
Average SPLs & A-Wt. Sound Level 61 57 55 44 41 41 34 27 25 45.1 vehicle traffic; noise of other facilities
9 Near the closest residences 5:30 PM 53 50 44 39 35 32 25 25 23 37.8 Noise of station audible but not domiant;
SW/SSW of station 5:50 PM 55 49 45 37 36 32 20 19 20 37.5 Most significant noise was distant I-70
Average SPLs & A-Wt. Sound Level 54 50 45 38 36 32 23 22 22 37.6 vehicle traffic
Table A:Encana High Mesa Station: Meas'd A-Wt. Sound Levels and Octave Band ("O.B.") SPLs as Measured
on Feb. 22, 2012 during Operation of Unit #1, Unit #2, Unit #5, Unit #6, Unit #7 and Unit #8.
Operating Conditions of Station/Units:
> Unit #1 (CAT 3516 skid-mounted unit): Engine speed of 1245 rpm; engine torque at 86 to 88%;
> Unit #2 (CAT 3516 skid-mounted unit): Engine speed of 1245 rpm; engine torque at 86 to 88%;
> Unit #5 (CAT 3516 skid-mounted unit): Engine speed of 1235 rpm; engine torque at 86 to 88%;
> Unit #6 (CAT 3516 skid-mounted unit): Engine speed of 1250 rpm; engine torque at 86 to 88%;
> Unit #7 (CAT 3516 skid-mounted unit): Engine speed of 1250 rpm; engine torque at 86%;
> Unit #8 (CAT 3616 unit in a building): Engine speed of 975 rpm; engine torque at 96%.
Measurement Set Temp. R.H. Wind Wind Peak Sky Conditions
Pos. Date/Time of Testing (°F) (%) Direction Speed Wind
1 to 9 3:30 PM to 6:00 PM (2/22/12) 48 - 50 50 - 55 South/SW 3 - 6 mph 6 - 8 mph Mostly cloudy
Table B:Ecana High Mesa Station: Meteorological Conditions during Sound Survey on Feb. 22, 2012.
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
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COLORADO OIL & GAS CONSERVATION COMMISSION (COGCC) NOISE REQUIREMENTS (800
SERIES OF THE RULES AND REGULATIONS)
The COGCC regulates the oil and gas drilling and production industry in the State of Colorado and the
mission of the COGCC is to promote the responsible development of Colorado’s oil and gas natural
resources. This “responsible development” balances efficient exploration and production of oil and gas
with the prevention of waste, protection of mineral owner’s rights, and protection of public health, safety
and welfare and the environment. In Colorado, the COGCC has the responsibility for regulating noise
from oil and gas facilities.
AESTHETIC AND NOISE CONTROL REGULATIONS
(Rules related to Noise Regulations and Noise Abatement as of November 30, 2006)
801. INTRODUCTION
The rules and regulations in this section are promulgated to control aesthetics and noise impacts
during the drilling, completion and operation of oil and gas wells and production facilities. Any Colorado
county, home rule or statutory city, town, territorial charter city or city and county may, by application to
the Commission, seek a determination that the rules and regulations in this section, or any individual rule
or regulation, shall not apply to oil and gas activities occurring within the boundaries, or any part thereof,
of any Colorado county, home rule or statutory city, town, territorial charter city or city and county, such
determination to be based upon a showing by any Colorado county, home rule or statutory city, town,
territorial charter city or city and county that, because of conditions existing therein, the enforcement of
these rules and regulations is not necessary within the boundaries of any Colorado county, home rule or
statutory city, town, territorial charter city or city and county for the protection of public health, safety and
welfare.
802. NOISE ABATEMENT
a. The goal of this rule is to identify noise sources related to oil and gas operations that
impact surrounding landowners and to implement cost-effective and technically-feasible mitigation
measures to bring oil and gas facilities into compliance with the allowable noise levels identified in
subsection c. Operators should be aware that noise control is most effectively addressed at the siting and
design phase, especially with respect to centralized compression and other downstream “gas facilities”
(see definition in the 100 Series of these rules).
b. Oil and gas operations at any well site, production facility or gas facility, shall comply with
the following maximum permissible noise levels
. Operations involving pipeline or gas facility installation or
maintenance, the use of a drilling rig, completion rig, workover rig, or stimulation is subject to the
maximum permissible noise levels for industrial zones. The type of land use of the surrounding area shall
be determined by the Commission in consultation with the local governmental designee taking into
consideration any applicable zoning or other local land use designation.
c. In the hours between 7:00 a.m. and the next 7:00 p.m. the noise levels permitted below
may be increased ten (10) db(A) for a period not to exceed fifteen (15) minutes in any one (1) hour
period. The allowable noise level for periodic, impulsive or shrill noises is reduced by five (5) db(A) from
the levels shown.
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
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ZONE 7:00 am to next 7:00 pm
(Daytime) (Nighttime)
7:00 pm to next 7:00 am
Residential/Agricultural/Rural 55 db(A) 50 db(A)
Commercial 60 db(A) 55 db(A)
Light industrial 70 db(A) 65 db(A)
Industrial 80 db(A) 75 db(A)
In remote locations, where there is no reasonably proximate occupied structure or designated
outside activity area, the light industrial standard may be applicable.
Pursuant to Commission inspection or upon receiving a complaint from a nearby property owner
or local governmental designee regarding noise related to oil and gas operations, the Commission shall
conduct an onsite investigation and take sound measurements as prescribed herein.
The following provide guidance for the measurement of sound levels and assignment of points of
compliance
for oil and gas operations:
(1) Sound levels shall be measured at a distance of three hundred and fifty (350) feet from the
noise source. At the request of the complainant, the sound level shall also be measured at a
point beyond three hundred fifty (350) feet that the complainant believes is more representative of
the noise impact. If an oil and gas well site, production facility or gas facility is installed closer
than three hundred fifty (350) feet from an existing occupied structure, sound levels shall be
measured at a point twenty-five (25) feet from the structure towards the noise source. Noise
levels from oil and gas facilities located on surface property owned, leased or otherwise
controlled by the operator shall be measured at three hundred and fifty (350) feet or at the
property line, whichever is greater.
In situations where measurement of noise levels at three hundred and fifty (350) feet is
impractical or unrepresentative due to topography, the measurement may be taken at a lesser
distance and extrapolated to a 350-foot equivalent using the following formula:
db(A)@DISTANCE 2 = db(A)@DISTANCE 1 – 20 x log10(distance 2/distance 1)
(2) Sound level meters shall be equipped with wind screens, and readings taken when the wind
velocity at the time and place of measurement is not more than five (5) miles per hour.
(3) Sound level measurements shall be taken four (4) feet above ground level.
(4) Sound levels shall be determined by averaging minute-by-minute measurements made over
minimum fifteen (15) minute sample duration if practicable. The sample shall be taken under
conditions that are representative of the noise experienced by the complainant (e.g., at night,
morning, evening, or during special weather conditions).
(5) In all sound level measurements, the existing ambient noise level from all other sources in the
encompassing environment at the time and place of such sound level measurement shall be
considered to determine the contribution to the sound level by the oil and gas operation(s).
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
-Page 12-
d. In situations where the complaint or Commission onsite inspection indicates that low
frequency noise is a component of the problem, the Commission shall obtain a sound level measurement
twenty-five (25) feet from the exterior wall of the residence or occupied structure nearest to the noise
source, using a noise meter calibrated to the db(C) scale. If this reading exceeds 65 db(C), the
Commission shall require the operator to obtain a low frequency noise impact analysis by a qualified
sound expert, including identification of any reasonable control measures available to mitigate such low
frequency noise impact. Such study shall be provided to the Commission for consideration and possible
action.
e. Exhaust from all engines, motors, coolers and other mechanized equipment shall be
vented in a direction away from all occupied buildings.
f. All facilities within four hundred (400) feet of occupied buildings with engines or motors
which are not electrically operated shall be equipped with quiet design mufflers or equivalent. All mufflers
shall be properly installed and maintained in proper working order.
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
-Page 13-
SUMMARY OF TYPICAL METRICS FOR REGULATING ENVIRONMENTAL NOISE AND
ACOUSTICAL TERMINOLOGY RELATED TO THE REPORT
(1) Decibel (dB): A unit for expressing the relative power level difference between acoustical or
electrical signals. It is ten times the common logarithm of the ratio of two related quantities that
are proportional to power. When adding dB or dBA values, the values must be added
logarithmically. For example, the logarithmic addition of 35 dB plus 35 dB is 38 dB.
(2) A-Weighted Sound Level (dBA): The A-wt. sound level is a single-figure sound rating, expressed
in decibels (Re 20 µPa), which correlates to the human perception of the loudness of sound. The
dBA level is commonly used to measure industrial and environmental noise since it is easy to
measure and provides a reasonable indication of the human annoyance value of the noise. The
dBA measurement is not a good descriptor of a noise consisting of strong low-frequency
components or for a noise with tonal components. The A-weighted curve approximates the
response of the average ear at sound levels of 20 to 50 decibels. The following are the relative
response of A-weighted filter per octave band frequency, and a graph/curve is provided below
that shows a graphical representation of the A-wt. filter response per frequency (in Hz).
31.5
Hz
63
Hz
125
Hz
250
Hz
500
Hz
1,000
Hz
2,000
Hz
4,000
Hz
8,000
Hz
16,000
Hz
-39.4 dB -26.2 dB -16.1 dB -8.6 dB -3.2 dB 0 dB +1.2 dB +1.0 dB -1.1 dB -6.6 dB
10
0
-10
-20
-30
-40
-50
16,00080004000200010005002501256331.516
RELATIVE RESPONSE,
dB
FREQUENCY, Hz
C
B
A
A
B, C
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
-Page 14-
(3) C-Weighted Sound Level (dBC): The C-wt. sound level is a single-figure sound rating, expressed
in decibels (Re 20 µPa), which correlates to the human perception of the loudness of sound in
excess of 85 decibels. The dBC level is commonly used to measure industrial and environmental
noise since it is easy to measure and provides a reasonable indication of the overall sound. The
difference between C and A-weighted sound levels provides an indication of the amount of lower
frequency sound energy. The following are the relative response of C-weighted filter per octave
band frequency, and a graph/curve is provided that shows a graphical representation of the C-wt.
filter response per frequency (in Hz), and the graph/curve above in Definition (2) shows a
graphical representation of the C-wt. filter response per frequency (in Hz).
31.5
Hz
63
Hz
125
Hz
250
Hz
500
Hz
1,000
Hz
2,000
Hz
4,000
Hz
8,000
Hz
16,000
Hz
-3.2 dB -1.0 dB -0.2 dB 0 dB 0 dB 0 dB -0.2 dB -0.8 dB -3.0 dB -8.5 dB
(4) Background or Ambient Noise: The total noise produced by all other sources of a given
environment in the vicinity of a specific source of interest, and includes any Residual Noise.
(5) Human Perception of Change in Sound Level
A 3 dB change of sound level is barely perceivable by the human ear
A 5 or 6 dB change of sound level is noticeable
If sound level increases by 10 dB, it appears as if the sound intensity has doubled.
(6) Sound Pressure Level (Lp or SPL): Ten times the common logarithm to the base 10 of the ratio of
the mean square sound pressure to the square of a reference pressure. Therefore, the sound
pressure level is equal to 20 times the common logarithm of the ratio of the sound pressure to a
reference pressure (20 micropascals or 0.0002 microbar).
(7) Octave Band Sound Pressure Level (SPL): Sound is typically measured in frequency ranges
(e.g., high-pitched sound, low-pitched sound, etc.) that provides more meaningful sound data
regarding the sound character of the noise. When measuring two noise sources for comparison,
it is better to measure the spectrum of each noise, such as in octave band SPL frequency
ranges. Then, the relative loudness of two sounds can be compared frequency range by
frequency range. As an illustration, 2 noise sources can have the same dBA rating and yet
sound completely different. For example, a high-pitched sound at a frequency of 2000 Hz could
have the same dBA rating as a much louder low-frequency sound at 50 Hz.
(8) Daytime Sound Level (Ld) & Nighttime Sound Level (Ln): Ld is the equivalent A-weighted sound
level, in decibels, for a 15 hour time period, between 07:00 to 22:00 Hours (7:00 a.m. to 10:00
p.m.). Ln is the equivalent A-weighted sound level, in decibels, for a 9 hour time period, between
22:00 to 07:00 Hours (10:00 p.m. to 7:00 a.m.).
Hoover & Keith Inc.
Encana Oil & Gas (USA) – High Mesa Station H&K Job No. 4489
Results of Sound Survey during Operation of the Station H&K Report No. 2701 (Date: 03/20/12)
-Page 15-
(9) Equivalent Sound Level (Leq): The equivalent sound level (Leq) can be considered an average
sound level measured during a period of time, including any fluctuating sound levels during that
period. In this report, the Leq is equal to the level of a steady (in time) A-weighted sound level that
would be equivalent to the sampled A-weighted sound level on an energy basis for a specified
measurement interval. The concept of the measuring Leq has been used broadly to relate
individual and community reaction to aircraft and other environmental noises.
(10) Day-Night Average Sound Level (Ldn): The Ldn is an energy average of the measured daytime Leq
(Ld) and the measured nighttime Leq (Ln) plus 10 dB. The 10-dB adjustment to the Ln is intended
to compensate for nighttime sensitivity. As such, the Ldn is not a true measure of the sound level
but represents a skewed average that correlates generally with past sound surveys which
attempted to relate environmental sound levels with physiological reaction and physiological
effects. For a steady sound source that operates continuously over a 24-hour period and
controls the environmental sound level, an Ldn is approximately 6.4 dB above the measured Leq.
Consequently, an Ldn of 55 dBA corresponds to an Leq of 48.6 dBA. If both the Ld and Ln are
measured, then the Ldn is calculated using the following formula:
()
+=+10/1010/
10dn nd1024
91024
15log10 LLL
(11) L-Percent Sound Levels: The L percent levels (e.g., L50, L90 & L10) refer to the A-weighted sound
levels that are exceeded for 90, 50 and 10 percent of the time, respectively, during a sound
measurement period. For example, the 50-percentile exceeded sound level is designated to as
L50 and is sometimes described as the median sound level. The range between the L10 and L90
values usually provides a good indication of the variability of the sound levels during the period of
measurement.
(12) Sound Level Meter (SLM): An instrument used to measure sound pressure level, sound level,
octave-band SPL, or peak sound pressure level, separately or in any combinations thereof. The
measured weighted SPL (i.e., A-Wt. Sound Level or dBA) is obtained by the use of a SLM having
a standard frequency-filter for attenuating part of the sound spectrum.
(13) Sound Power Level (Lw or PWL): Ten times the common logarithm of the ratio of the total
acoustic power radiated by a sound source to a reference power. A reference power of a
picowatt or 10-12 watt is conventionally used.
(14) Tone: A tone is a sound sensation-having pitch, which is a listener’s perception of the
frequency (for example, the higher the frequency, the higher the pitch). For a measured
sound spectrum, a tone is represented as a “peak” in the spectrum curve. Noise that
contains significant tones is considered a tonal type of noise.
End of Report
Basic Traffic Study
Grand River Gathering LLC
High Mesa Compressor Station
OA Project No. 012-0732
826 21 ½ Road | Grand Junction, CO 81505 | TEL 970.263.7800 | FAX 970.263.7456
826 21½ Road TEL 970.263.7800
Grand Junction, CO 81505 FAX 970.263.7456 www.olssonassociates.com
BASIC TRAFFIC STUDY
INTRODUCTION & OBJECTIVE
This Basic Traffic Analysis summarizes findings of a traffic impact analysis performed for Grand
River Gathering LLC (GRG) High Mesa Compressor Station located southeast of the City of
Rifle, Colorado.
It is expected that the lifespan of the site will be a maximum of 30 years.
EXISTING NETWORK
The High Mesa Compressor Station is accessed CR 304 and a private road system. CR 304 is
a two lane gravel road.
TRIP GENERATION/DISTRIBUTION
Trip generation is generally determined using rates found in the IT E Trip Generation manual.
Rates from this publication are applied to values related to the size of the proposed site to
estimate the trips expected to enter and exit the site. In this case, no rates are provided for
facilities similar to these. To estimate trips expected for this site, information was gathered
regarding the expected traffic based on previous projects similar to this one. The following table
summarizes the expected average and maximum trips for each phase discussed previously.
Table 1: Trip Generation – HIGH MESA Compressor Station
Phase
Average
Trips/Day
Maximum
Trips/Day
Percent
Trucks
Total
Trips/Phase
Phase
Duration
Operation <1 1 n/a 7665 30 years
Reclamation 5 14 14 % 74 14 days
Note that the estimated lifespan of the site is expected to be a maximum of 30 years. Current
ADT’s and expected trip generation are currently present accommodating GRG’s natural gas
production in the area.
Traffic Analysis Page 2
AUXILIARY LANE ANALYSIS
As defined in the Garfield County Road Inventory Report, CR 304’s Functional Classification is
Local as set by Colorado Department of Transportation (CDOT) and the Federal Highway
Administration (FHWA). Garfield County does not have traffic volume data available for CR 304.
However, the addition of the small amount of traffic generated by the operation of this facility, as
set forth in Table 1, does not warrant auxiliary lanes..
RECOMMENDATIONS
Based on the expected trip generation rates discussed above, the increase in average daily
traffic is not expected to be significant. Based on the results of the analysis, no mitigation is
recommended. The additional traffic from the compressor station will not significantly increase
the existing low levels of traffic. Based on this analysis, no roadway improvements or turn lanes
are anticipated to be required to support this project.
Class I Cultural Resources Study
Grand River Gathering LLC
High Mesa Compressor Station
OA Project No. 012-0732
826 21 ½ Road | Grand Junction, CO 81505 | TEL 970.263.7800 | FAX 970.263.7456
FLATTOPS ARCHAEOLOGICAL CONSULTANTS
P.O. BOX1893
March 5, 2012
Mr. Lorne Prescott
Olsson Associates
826 21 J2 Road
Grand Junction, Colorado 81505
CC: Mr. Fred Jarman
Garfield County, Building & Planning
108 81h Street, Suite 401
Glenwood Springs, Colorado 81601
CARBONDALE, CO 81623
(970) 379-2846
RE: Letter Report of Fi ndings-Class I Cultural Resources Study for the Encana Oil & Gas (USA) Inc., High
Mesa Compressor Station, Parcel #2409-361-00-048, Garfield County, Colorado
Dear Mr. Prescott,
This letter report of findings serves as documentation for the completion of a Class I Cultural
Resources Study of the proposed Encana Oil & Gas (USA) Inc., High M esa Compressor Station (Parcel
#2409 -3 61 -00-048) in Garfield County, Colorado. This report satisfies the requirements of the Garfield
County Unified Land Use Resolution, Article IV Section 4-502E part 8b: A determination of the effect on
significant archaeological, cultural, paleontological, historic re so urces . The project is located in Section
36, Township 7 South, Range 96 West (61
h Principal Meridian). Cultural resource files for Section 36
were reviewed for this study.
The proposed project area is located approximately four miles south-southwest of Battlement
Mesa, Colorado and is accessed via Garfield County Road 304 and a private road system maintained by
Encana. Physiographically, it is located along the southwestern edge of High Mesa at approximately
5,940 feet above sea level.
The file search was conducted on March 5, 2012, by reviewing the Colorado Office of
Archaeology and Historic Preservation's COMPASS database. Sixteen previous Class Ill cultural resource
inventory projects have taken place. in Sect ion 36, T7S, R96W (Table 1); twelve cultural resources have
been recorded as a result of these projects (Table 2). Four (5GF1539, 5GF2648, 5GF2653, and SGF3636)
of the cultural resources are prehistoric isolated finds. The isolated finds have been f iel d evaluated not
eligible for inclusion on the National Register of Historic Places (NRHP}; no further work is
recommended.
One site (SGF2649) is a prehistoric open camp, and two (SGF2651 and SGF4141) are prehistoric
open lithic sites. 5GF2651 is field evaluated not eligible; no further work is recommended. SGF2649 is
Kae McDonald
Principle Investigator
flattopsarchaeo/ogical99@comcast.net
field evaluated needs data, and SGF4141 is officially determined needs data; avoidance and protection
are recommended for these two sites .
The remaining five sites are historic-three of these sites (SGF447, SGF2650, and SGF2652) are
habitation sites, another is a trail (SGF392), and one is a ditch (SGF4149.1). SGF2650, SGF2652, and
SGF4149.1 are officially determined not eligible for inclusion on the NRHP; no further work is
recommended. SGF392 and SGF447 are officially determined needs data; avoidance and protection are
recommended for these sites.
Based on an examination of the site forms for SGF392, SGF447 , SGF2649, and SGF4141, it was
determined that these sites are located outside the proposed project area and will be avoided.
Therefore, based on the results of this Class I inventory, Flattops Archaeological Consultants
recommends a finding of no historic properties affected. However, should the proposed project location
change, or if other cultural resources are discovered or unearthed during ground-disturbing activities, a
qualified archaeologist should be notified .
If you have questions or concerns, please do not hesitate to contact me at your convenience.
¥:;· ~ Kae~~PA
Principal Investigator
Table 1: Previous Class Ill Inventories in Section 36, TSS, R96W.
SHPOSurvey Project Title Client Company Year Sites
ID#/BLM ID#
GF .LM.R131 Cultural Resources Inventory Report of Fuel Resources Grand River 1980 SGF447
Proposed Gas Wells H-25-7-96S and D-31-Development Institute 7-95S
Company
GF.LM.R218 Cultural Resource Inventory of Six Western Slope Grand River 1982
MC.LM.R371 Segments of the Parachute-Debeque 8-Gas Company Institute inch Loop Line occurring on BLM Lands
MC.LM.R68 Grant-Norpac C ultural Resource Inventory Grant-Norpac Metcalf 1991 SGF1539
of a 39 Mile Seismic Line Archaeological
Consultants
GF .LM.R107/ Tom Brown, Inc . High Mesa Access Roads Tom Brown, Metcalf 1997 5GF447
BLM #5498-6 Class Ill Cultural Resource Inventory Inc. Archaeological
Con sultants
GF.LM .R178/ Cultural Resource Inventory for the High BLM BLM 1998 5GF2648
BLM -GSRA Mesa Wildlife Habitat Improvement 5GF2649
S#1098-20 Project 5GF2650
5GF2651
5GF2652
GF.LM.R277 Tom Brown , Inc. Parachute Federal 31 -22 Tom Brown, Metcalf 1998
Well Pad and Access Road Class Ill In c. Archaeological Cultural Resource Inventory
Consultants
GF.LM.R213 Class Ill Cultural Resource Inventory Canyon Gas Metcalf 2002
Report for the Proposed Canyon Gas Resources Archaeological Resources Bentley Phase II Gas Pipeline Consultants
GF.LM.R255 Class Ill Cultural Resource Inventory for Canyon Gas Metcalf 2003
the Proposed Canyon Gas Resources Resources Archaeologica I South Parachute Gas Pipeline Consultants
GF .lM.R339 Class Ill Cultural Resource Inventory for Noble Energy Grand River 2004
Four Well Locations and Related Institute Access/Pipeline Routes
GF.LM .R325 Class Ill Cultural Resource Inventory for Williams Grand River 2005 5GF3636
the Proposed South Parachute #22-8 Well Production Institute Location and Related Access (0.75 Mile)
RMT
GF .LM.R338 Encana Oil and Gas (USA), Inc. Natural Encana Oil and Greystone 2005 5GF2652
Gas Gathering Pipeline to PH -1 Well Class Gas (USA}, Inc. Ill Cultural Resource Inventory
GF .lM.R449 Class Ill Cultural Resource Inventory for Encana Oil and Grand River 2006
the Proposed and Alternate Routes of the Gas (USA}, Inc. Institute South Parachute Pipeline Extension
GF.lM .R450/ Encana Oil & Gas (USA), Inc. South Encana Oil and Arcadis-2006 5GF2650
BLM -GSFO Parachute Geographic Area , 20 Well Gas (USA}, In c. Greystone locations Class Ill Cultural Resources
#14606-3 Inventory, Garfield County , Colorado
GF.LM .R451 Class Ill Cultural Resources Inventory of Not Listed Uncompahgre 2008 SGF447
the ETC Canyon South Parachute loop Archaeological SGF4141 Pipeline
Consultants 5GF4149.1
GF.LM.NR922/ Class Ill Cultural Resource Inventory for Encana Oil and Grand River 2010
BLM-CRVFO the Proposed High Mesa 16-inch Discharge Gas (USA), Inc. Institute
#1111-1
Pipeline on Private Land
GF.LM .R488/ Encana PD-31B WPA: A Class Ill Cultural Encana Oi l and Metcalf 2010 5GF447
BLM-CRVFO Resource Inventory of a Well Pad and an Gas (USA}, Inc. Archaeologica I
#5411-2 Access Road Consultants
Table 2: Cultural Resources located in Section 36, TSS, R96W.
Smithsonian Site Type Site National Register Recommendations SHPOSurvey
Number Description Eligibility IDNo.
SGF392 Historic Escalante-Officially Needs Avoid and Protect GF.LM .R166
Dominguez Trail Data (2006)
SGF447 Historic Cow Camp Officially Needs Avoid and Protect GF.LM.R107
Data (2010) GF.LM.R131
GF.LM.R451
GF .LM.R488
SGF1539 Prehistoric Isol ated Find Not Eligible -Field No Further Work MC.LM.R68
GF.LM.R166
SGF2648 Prehistoric Isolated Find Not Eligible -Field No Further Work GF.LM.R178
5GF2649 Prehistoric Open Camp Needs Data -Field Avoid and Protect GF.LM .R178
Historic Isolated Find
SGF2650 Historic Habitation Officially Not No Further Work GF.LM.R178
Eligible (2007) GF.LM.R450
SGF2651 Prehistoric Open Lith ic Not Eligibl e -Field No Further Work GF .LM.R178
SGF2652 Historic Habitation Officially Not No Further Work GF.LM.R178
Eligible (2005) GF.LM.R338
SGF2653 Prehistoric Isolated Find Not Eligible -Field No Further Work GF.LM.R178
5GF3636 Prehistoric Isolated Find Not Eligible -Field No Further Work GF.LM.R325
5GF4141 Prehistoric Open Lithic Officially Needs Avoid and Protect GF .LM.R451
Data (2008)
SGF4149 .1 Historic Marling Ditch Officially Not No Further Work GF.LM.R451
Eligible (2008)