HomeMy WebLinkAbout20202495.tiffINVENTORY OF ITEMS FOR CONSIDERATION
Applicant Burnco Colorado LLC
Case Number USR20-0013
Submitted or Prepared
Prior to At
Hearing Hearing
1
Electronic
results
mail
receive
for
June
A.
17,
Rodriguez
2020
to
(4
pages)
Planning
—
Preliminary
Noise
Study
2
Submittal
2020
(2
of Signature
pages)
Page
for Stinar, co applicant,
received
June 29,
3
Noise
2020 (18
Modeling
pages)
Report
prepared
by
Behrens
and Associates
dated
July
2,
4
Affidavit
of
Sign
Posting
and
Photograph
dated
July
20, 2020 (4 -pages)
5
Conveyor
dated July
Cross Section
29, 2020 (2
Illustration
pages)
with
Public
Works
redline
comments
6
ARMS
dated
May
Approval
15,
2020,
Letter
for The
received
Shores,
August
3,
Permit
2020 (1
M1998-013,
page)
Vogl
Mine
7
Conveyor Cross Section
comments dated July
Illustration
29,
2020,
addressing
received
August
Public
3,
Works
2020 (2
redline
pages)
X
` 8
X
Burnco Colorado
LLC
Planning
Commission
Presentation (15
pages)
9
10
a
11
12
I hereby certify that the items identified herein were submitted to the Department of Planning Services at
or prior to the sche uled Planning Commissioners hearing,
Kim Ogle r° FInner
From: Andy Rodriguez <andy@civilresourcesicor>
Sent: Wednesday, June 17, 2020 2:09 PM
To: Kim Ogle <kogle@weldgov.com>
Cc: Lauren Light cIlight@weldgov.com>
Subject: R E : USR20-0013
Caution This email originated from outside of weld County Government. Do not click links or open attachments unless you
recognize the sender and know the content is safe.
See below, the noise study is not finalized but we are close, I should have the finalized report next week
but I wanted to talk to Lauren about the results.
I was going to follow up with Lauren once I had these results.
• 01 re -position equipment 3O from west cell boundary, remove excavator, power screen in
center of cell 1, no berm — power screen could actually be moved to the east third of the cell, so
even further away from the east boundary then the center location.
Average Noise
Level, Leg dBA
30.0
35.0
_ 40.0
45,0
50.0
= 55.0
60.0
65.0
= 70,0
75.0
= 80.0
85.0
= 90.0
0 300 600 900 1200
feel
EXHIBIT
usi?,oe db13
� t
02 — equipment same as 01, 15' berm, equipment 30' from west cell boundary will stay the
same for 01 and 02 regardless of berm — same scenario as "01" but add a berm,
= 30.0
35.0
= 40.0
45.0
50,0
55.0
60.0
65.0
70.0
15.0
a 80.0
s 85 0
90.0
• 03 — equipment 30' from east cell boundary, remove excavator and power screen, no berm —
this is correct, I think this might have been modeled this way but double check that the
equipment is 30' away and verify there is no power screen or excavator in this scenario.
a 04 - equipment same as 03, 15' berm (no berm in floodplain), in), equipment 30' from east cell
boundary will stay the same for 03 and 04 regardless of berm — same as "03" but model this
option with a berm on that east flank, if the results show significant reduction in noise and we
want to go this route I will plan on doing a flood hazard development permit.
Average Noise
Level, Leg dBA
From: Kim Ogle imailto:kot@weldgov.com]
Sent: Wednesday, June 17, 2020 1:54 PM
To: Andy Rodriguez <a ady@ci rilr+ sourcesec rn>
Subject: FW: LASR2O-0013
Importance: High
=30.0
=35.0
40.0
14 5.0
50.0
55.0
60.0
65.0
Y_0
- 75.0
- 80.0
85.0
-90.0
300 00 900 120
-
Hey Andy
See Lauren's question. I set the case without a noise study. Was one prepared for the state permit. As
you are digging and conveying with little impact to neighbors? Please let me know. Thanks
Kim Ogle
Principal Planner
Weld County Planning Services
1555 North 17th Avenue
Greeley, Colorado 80631
970.400.6100 Office
970, 400.3549 Direct
k,� ,l..rer:Ydye cl ,ov.coIrn
From: Lauren Light cIiig_ht@weld, o_v.cam>
Sent: Wednesday, June 17, 2020 1:48 PM
To: Kim ogle <ko le@welcigov.conl>
Subject: USR2O-0013
Importance: High
I cant find the noise study for the gravel mine is it in the materials? Was the case set
up without the noise study?
Lauren Light, M, B. S.
Program Manager/Environmental Planner, Environmental Health Services
Weld County Department of Public Health & Environment
1555 N. 17th Ave_
Greeley, CO 80631
Ilight@eidgov.corr
970-400-2211 (office)
rid
tectepirtAll
lbkaarAir
►a, 1 c it i Yep
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DEPARTMENT OF PLANNING AND BUILDING
DEPARTMENT OF PUBLIC HEALTH AND ENVIRONNMENT
1555 NORTH 1 P8 AVENUE
GREELEY, CO 80631
AUTHORIZATION FORM FOR BUILDING, PLANNING AND HEALTH DEPARTMENT PERMITS
AND SERVICES
slinarNogl
I, (We),
(Owner - please print)
give permission to
mark Johnson {BUNCO)
(Applicant/Agent - please print)
to apply for any Planning, Building or Health Department permits or services on our behalf, to the property
located at:
11995 CR 11.25, Longmont, CO 80504, Parcel numbers: 131301000016, 120736000051, 120736000061
Legal Description:
Subdivision Name:
S1 -T lttR W £25053 NW4NW4 2 68 (3L)), 36LT3NtR.68Wrn (25658 4 36 3 55), & 51643N,
RB B (VARRA #5 PIT 25658a E2SW4 35 3 65 OR))
Property Owners Information:
303 915 4965
Phone: E-mail:
Applicant/Agent Contact information:
970 587 7277
Phone:
Mer .iohnson@bun co,com
E -Mail:
Email correspondence to be sent to:
Owner II_ Applicant/Agent
Both_
Postal service correspondence to be sent to; (choose only one) Owner 11_ Applicant/Agent
The proposed mine Is a gravel lease. Affected is a signed lease with the current owner and BURICO.
Additional l ilo.
Owner Signature:
Owner Signature;
W2912019
Date: Se21 3- #70,2O
Date -
EXHIBIT
U SIZ'l0 txar3
USE BY SPECIAL REVIEW (USR) APPLICATION
FOR PLANNING DEPARTMENT USE: DATE RECEIVED:
AMOUNT $ CASE # ASSIGNED:
APPLICATION RECEIVED BY PLANNER A IGN'Ea
PROPERTY INFORMATION (Attach additional sheets if naoessar &)
Is the property currently in violation? No / Yes Violation Case Number:
C
Site Address: 11995 CR 11.25, Longmont, CO 80504
Parcel Number 131301000016, 120736000051, 120736 00061
1
Legal es ription: . 1-1-2N R6B (25D53 NW4NW4 1 2 68 (314)1 S38-T3I R68Wr (25658 w4 4 36 3 eats, & aGa
T3C -R6B t AR #5 PIT 25556-A E28W4 36 3 6� 1R))
Zoning District Ag ■J
If yes, subdivision or townsite name:
Floodplain
El
No I Yes Geological Hazard MI No 1 l Yes Airport Overlay 1 MI No / 1 Yes
PROPERTY OWNER(S) (Attach additional sheets if necessary)
Name: Stinar & Vogl -Aggregate Lease
Company:
Name of proposed business:
Phone #: 303.915.4965
Street Address: 11995 CR 11.25,
Email:
City/State/Zip Code: Longmont, CO 80504
Name:
Company:
Phone #:
Street Address:
CityfState/Zip Code:
Email:
APPLICANT/AUTHORIZED AGENT (Authorization must be included if them is an Authorized Agent)
Name: Andy Rodriguez (consultant) or Mark Johnson (miner)
Company: Civil Resources, LLC or BURNCO dba Bestuw.ay Concrete & Aggregate
Phone #: 3031333 1418 or (970) -5D7-7277 Erail: andy@dvilresoucres.cam orMsrk.Johnson@bumco.com
Street Address: PO 680 or 301 Centennial Drive
City/StatelZip Code: Frederick, CO 80530 or Milliken, CO 80543
I (We) hereby depose and state under penalties of perjury that all statements, proposals, and/or plans
submitted with or contained within the application are true and correct to the best of my (our) knowledge.
All fee owners of the property must sign this application. If an Authorized Agent signs, an Authorization
Form signed by all fee owners must be included with the application. if the fee owner is a corporation,
evicreactimu : t be included indicating the signatory has the [egal authority to sign for tl]e corporation.
21 c
Si.nat re
fro Leech le
diala-nie20_2‘)
M,.
Date Sign crrp
If
Print Print
01/01/2020
Date
a
Yogi Gravel Mine
Noise Modeling Report
July 2, 2020
Prepared for:
Civil Resources, LL,
323 5th t. PLO Box 680
Frederick, CO 80530
Prepared by:
Behrens and Associates, Inc.
9536 E. 1-25 Frontage Road
Longmont, CO 80504
Andrew Truitt
Senior Engineer
Jason Peetz
Engineering Manager
}c rporaIc Office: I iami_lhcmrne * California
Carson, Cali ronlia - Texas -- MIN California - I ,cngruont. Colorado - Ni DDonal , PcniisyI iatida
800-679-8633
1,ti 1M1iv,cerrvirolioli,:or41-maiso-critrolticorri. ,chiIiirwdiok.b,°ontrol.com
Behrens and Associates, Inc.
Environmental Noise Control
IL. Introduction
The following report provides a noise modeling assessment of the proposed Vogl Gravel Mine to be operated by
Burnco. Per the pending Weld County Use by Special Review (USR) permit application, the project will be assessed
in relation to the Colorado Revised Statutes (CRS) 25-12-103 noise regulations. The noise modeling includes
currently proposed mechanical equipment per transmittals from Civil Resources and Burnco. The Vogl Gravel Mine
(40.176367,-104.955294) parcel is located adjacent to the intersection of Weld County Road 26 and Weld County
Road 11.25 approximately 4.5 miles northwest of Firestone, Colorado. Figure 1-1 identifies the proposed site
location.
To assess the predicted noise levels of the proposed operations, manufacturer sound level data of proposed equipment
was used as well as file sound level data collected by Behrens and Associates during an equipment survey of the
similar sand and gravel mining operations. The equipment sound level data was used to construct a noise model using
SoundPLAN 8.1 software.
The following is provided in this report:
• A brief introduction of the fundamentals of noise.
A review of the applicable project noise standards.
• Discussion of noise modeling methodology and results.
Figure 1-1 Proposed Site Location
Introduction
Behrens and Associates, Inc,
Environmental Noise Control
2. Noise Fundamentals
ThJ1L/\
Sound is most commonly experienced by people as pressure waves passing through air. These rapid fluctuations in
air pressure are processed by the human auditory system to produce the sensation of sound. The rate at which sound
pressure changes occur is called the frequency. Frequency is usually measured as the number of oscillations per
second or Hertz (Hz). Frequencies that can be heard by a healthy human ear range from approximately 20 Hz to
20,000 Hz. Toward the lower end of this range are low-pitched sounds, including those that might be described as a
"rumble" or "boom". At the higher end of the range are high-pitched sounds that might be described as a "screech"
or "hiss".
Environmental noise generally derives, in part, from a combination of distant noise sources. Such sources may include
common experiences such as distant traffic, wind in trees, and distant industrial or farming activities. These distant
sources create a low-level "background noise" in which no particular individual source is identifiable. Background
noise is often relatively constant from moment to moment but varies slowly from hour to hour as natural forces
change or as human activity follows its daily cycle.
Superimposed on this low-level, slowly varying background noise is a succession of identifiable noisy events of
relatively brief duration. These events may include the passing of single -vehicles, aircraft flyovers, screeching of
brakes, and other short-term events. The presence of these short-term events causes the noise level to fluctuate.
Typical indoor and outdoor A -weighted sound levels are shown in Figure 2-1. Detailed acoustical definitions have
been provided in Appendix A — Glossary of Acoustical Terms.
COMMON OUTDOOR
SOUND LEVELS
B-747-200 Takeoff at 2 mi.
Gas Lawn Mower at 3 ft.
Diesel Truck at 150 ft.
DC -9-30 Takeoff at 2 mi.
Noisy Urban Daytime
B-757 Takeoff at 2 mi.
Commercial Area
Quiet Urban Daytime
Quiet Urban Nighttime
Quiet Suburban Nighttime
Quiet Rural Nighttime
NOISE LEVEL COMMON INDOOR
dB (A) SOUND LEVELS
110
Rock Band
100 Inside Subway Train
(New York)
90
80
70
60
50
40
30
20
10
Food Blender at 3 fit,
Garbage Disposal at 3 ft.
Shouting at 3 ft.
Vacuum Cleaner
at 10 ft,
Normal Speech
at3f1,
Large Business Office
Dishwasher Next Room
Small Theatre, Large
Conference Room4
(Background)
Library ,.
i�-
Bedroom at rlg t ��=--;r,r
Concert Hall (Background) ,
Broadcast & Recording
Studio
Threshold of Hearing
Figure 2-1 Typical Indoor and Outdoor A - Weighted Sound Levels
Noise Fundamentals
Behrens and Associates, Inc.
Environmental Noise Control
3. Project Noise Limits
The modeling analysis was developed to predict operational noise levels of the proposed mining operations and assess
compliance of the proposed operations with the applicable developmental standards of the pending Use By Special
Review (U R) permit application. At the time of this analysis, The Department of Public Health and Environment
for Weld County has not yet provided the developmental standards or prescribed noise level standards for this land
use application and therefore the results of this analysis will not be referenced againstthe code until such a time that
the noise level standards have been prescribed for this application.
Project Noise Limits
ehrens and Associates, Inc,
Environmental Noise Control
4. Vogl Gravel Mine Noise Modeling
4.1 Noise Modeling Methodology
The noise modeling was completed with use of three-dimensional computer noise modeling software. All models in
this report were developed with SoundPLAN 8.1 software using the ISO 9613-2 standard. Noise levels are predicted
based on the locations, noise levels and frequency spectra of the noise sources, and the geometry and reflective
properties of the local terrain, buildings and barriers. SoundPLAN 8.1 software simulates light downwind conditions
in all directions to ensure conservative assessments. The predicted noise levels represent only the contribution of the
proposed gravel pit operations and do not include ambient noise or noise from other facilities. Actual field sound
level measurements may vary from the modeled noise levels due to other noise sources such as traffic, other facilities,
other human activity, or environmental factors.
To assess the predicted noise levels ofthe proposed operations, manufacturer sound level data of proposed equipment
was used as well as file sound level data collected by Behrens and Associates during an equipment survey of similar
sand and gravel mining operations. The modeling results predicted are dependent on equipment orientation as
indicated per current (Rev. Date 4/27/2020) project documentation and is exclusive to the equipment listed in Table
4-1. The proposed mining operations are to occur during daytime hours only. To reduce the predicted impact of the
mining operations, 15 -foot -tall earthen berms are strategically placed in the model. To further reduce noise,
excavation activities have been proposed to start in the middle of each cell in order to work down to final grade and
then work towards the mining boundaries. All mining equipment is modeled at 10 feet below existing grade to
evaluate this impact. The noise model is only focused on the proposed operations for mining cells one and three due
to the fact that these cells are the closest to the proposed [ISIS. boundaries, as well as existing residential properties,
and are therefore the most crucial from an acoustical standpoint. Figure 4-1 shows the Vogl Gravel Mine pre -mining
plot plan and equipment layout utilized in the study.
Table 4-1 Equipment Modeled for Vogl Gravel Mine
Quantity
Proposed
ui meat
Source Sound Power
Level (Lw dBA)
Equipment
Tv a
Data Source
1
Wheeled Loader
Komatsu 500
Manufacturer
Data
114.7
3
Conveyor Motor
Peerless
BAENC File
Data
90.8
I.
Power Screen
Chieftain 1400 S
BAENC F`i le
Data
114.5
4.2 Noise Sensitive Receptors
The noise sensitive receptors have been chosen to be consistent with the requirements of the CRS 25-12-103 noise
standards. The requirements indicate that sound levels of noise radiating from a property line at a distance of twenty-
five feet or more therefrom in excess of the dB(A) established for the following time periods and zones shall constitute
prima facie evidence that such noise is a public nuisance. As such, receptor locations were chosen at 25 ft from the
proposed USR boundary lines of the Vogl Gravel Mine to represent potential regulatory measurement points should
a complaint be made. Figure 4-2 shows the dBA noise sensitive receptor locations. Additional receptor locations have
been added to evaluate predicted noise at various nearby residential properties as shown in Figure 4-3,
Vogl Gravel Mine Noise Modeling
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Behrens and Associates, Inc.
Environmental Noise Control
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Figure 4-1 Vogl Gravel Mining Plot Plan (Due. Date 12/18)
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Vogl Gravel Mine Noise Modeling rs
5
Behrens and Associates, Inc.
Environtnental Noise Control
4.3 Noise Modeling Results
Two modeling scenarios were created to predict the sound levels at the proposed site and are described in Table 4-2.
The results of the noise modeling are presented in Table 4-3 and Table 4-4. The locations in the tables correspond to
the receptor locations identified in Figure 4-2 and Figure 4-3. The results of the noise modeling are also shown as
noise contour map. Figure 4-5 shows the Scenario 1 - Noise Contour Map in dBA and Figure 4-6 shows the Scenario
2 — Noise Contour Map in dBA. The noise contours are provided in 5 dB increments with the color scale indicating
the sound level of each contour.
Table 4-2 Modeled Scenarios
Modeled Scenario
Description
Gravel pit processing equipment as indicated
proposed parcel per the pre -mining layout
placed nearest the southwestern boundary
in Table 4-1 is placed in Cell 1 of the
document (Figure 4-1). The loader has been
to offer a worst -case scenario while the screen
Scenario 1
and conveyors have been placed to the northeast cell boundary. Overburden
have been placed around the site perimeter at a height of approximately
stockpiles
15 feet per Figure
4-4. No equipment modifications or additional
included.
acoustical mitigation options have been
The scenario includes only the loader as indicated in Table 4-1 and is placed in Cell 3 of
scenario
the proposed parcel per the pre -mining
placed nearest the northeastern boundary
modifications or additional acoustical
layout document
to offer
mitigation options
(Figure 4-1). The loader has been
a worst -case scenario. No equipment
have been included.
1,
Figure 4-4 Scenario 1— Proposed Berm Locations
se
•M: DFPSEF --
•
FpA
'MP
15' Earthen
Berms
W'tisdifJ'. d
,d1' ;.UP
10w err
X100
a Solara ■' 11! ui,-i.i \It
1ii • =* I'I • u u.ill' u. •
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FUG RECLAIMON
FLDG`D gt
CELL 1
??.? ACRE wfl
MINED &
RECLAIMED TO
NATIVE GRADE
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24" CYP
INVe4ciaa G
6 ReRREb.aiat FEVGE
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Vogl Gravel Mine Noise Mod.eling
Behrens and Associates, inc.
Environmental Noise Control
Table 4-3 Unmitigated Noise Modeling Results (dBA)
Receptor
Location Description
Scenario 1
Scenario 2
Location 1
32.6
52.5
25 ft. from Southwestern
USR Boundary
Location 2
25 ft. from Southwestern
USR Boundary
51.1
32.9
Location 3
333
25 ft, from Southwestern
USR Boundary
47]
49.3
33.9
Location
4
25 ft. from Southwestern
USR Boundary
Location
5
45.9
34.9
25 ft. from Western
USR Boundary
Location 6
25 ft. from Northern
USR Boundary
4045
37.6
Location 7
25 ft. from Northern
USR Boundary
37.9
41.3
25 ft. from Northern
USR Boundary
34.1
37.6
Location 8
Location 9
25 ft. from Northeastern
USR Boundary
36.3
52.2
Location 10
25 ft. from Northeastern
USR Boundary
37.4
61.8
Location 11
51.9
25 ft. from Northeastern
USR Boundary
40.4
Location 12
25 ft. from Northeastern
USR Boundary
41
48.8
Location 13
25 ft. from Northeastern USR Boundary
42.2
52.3
Location 14
25 ft. from Northeastern USR. Boundary
45
45.9
Location 15
25 ft. from Northeastern USR Boundary
48.9
42.1
Location 16
54.8
39.6
25 ft. from. Eastern USR. Boundary
Location 17
25 ft. from Eastern USR Boundary
54,4
37.7
Location 18
25 ft, from Eastern USR Boundary
51.7
36.1
Location 19
56.7
34.7
25 ft. from Southern USR Boundary
Location 20
25 ft. from Southern USR Boundary
58.9
33.2
Vogl Gravel Mine Noise Modeling
Behrens and Associates, Inc.
Environmental Noise Control
Table 4-4 Unmitigated Noise Modeling Results NBA)
Receptor
Location Description
Scenario 1
Scenario 2
Location
Eastern
3,4, Longmont,
Property Line of 4961 County Road 24
CO 80504
46.7
32.8
Eastern Property Line of 4772 County Road 24
3, Longmont, CO 80504
w
.
I
Location B
51. 6
LocationSouthern
Property Line of 11997
11 1/4, Longmont, CO 8050452
County Road
3
395
.
Location D
5l.3
Southern
11 1/4,
Property Line of 11997
Longmont, CO 80504
County Road
. 2
Location
Western Property
Drive, Longmont,
Line of 5775 Pelican Shores
CO 80504
37.3
44.8
Location F
Western Property
Drive, Longmont,
Line of 5751 Pelican Shores
CO 80504
36.9
42.9
38.6
43.1
Location
Western Property
Longmont,
Line of 5312 County Road 26,
CO 80504
Location H
Northern Property Line of 11750 County Road
11 'A. , Longmont, CO 80504
50.,7
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Vogl Gravel Mine Noise Modeling
1.9
Behrens and Associates, Inc,
Environmental ronmental Noise Control
Figure 4-6 Scenario 2 - Noise Contour Map NBA)
Average Noise
Level, Leg dBA
30.0
35.0
40.0
45.0
= 50.0
55.0
= 60.0
65.0
70.0
= 75.0
80.0
85.0
90.0
0 300 600 900 1200
feet
Vogl Gravel Mine Noise Modeling
Behrens and Associates, Inc.
Environmental Noise Control
S. Conclusion
A predictive noise model was created to represent the proposed operations of the Vogl Gravel Mine to be operated
by Burnco. Equipment placement and overburden piles were placed per currently approved project documents. Noise
sensitive receptor locations included in the models were placed in compliance with the applicable CRS 25-12-103
noise standards.
At the time of this analysis, The Department of Public Health and Environment for Weld County has not yet provided
the developmental standards or prescribed noise level standards for this land use application and therefore the results
of this analysis will not be referenced against the code until such a time that the noise level standards have been
prescribed for this application. No additional acoustical mitigation measures are recommended at this time.
Conclusion
Behrens and Associates, Inc.
Environmental Noise Control
Appendix A - Glossary of Acoustical Terms
Glossary of Acoustical `Perms
Behrens and Associates, Inc.
Environmental Noise Control
Ambient Noise
The all -encompassing noise associated with a given environment at a specified time, usually a composite of sound
from many sources both near and far.
Average Sound Level
See Equivalent -Continuous Sound Level
As:Weighted Decibel Scale
The human ear is more sensitive to some sound frequencies than others. It is therefore common practice to apply a
filter to measured sound levels to approximate the frequency sensitivity of the human ear. One such filter is called
the A -weighted decibel scale which emphasizes sounds between 1,000 and 5,000 Hertz by discounting the frequencies
outside of this range. As the human ear is less sensitive to low frequency noise, the A -weighted decibel scale begins
to increasingly discount noise below 500 Hertz.
Measurements conducted utilizing the A -weighted decibel scale are denoted with an "(A)" or "A" after the decibel
abbreviation (dB(A) or dBA). The A -weighted scale is nearly universally used when assessing noise impact on
humans.
-weighted Decibel Scale
High level low frequency noise can propagate large distances from its source. Although not always audible, high
levels of low frequency noise can induce vibrations in objects or structures which could become evident in ways that
might be annoying to humans (e.g., rattling of windows). The C -weighted decibel scale, which was developed to
estimate human ear sensitivity to high noise levels, is a flatter filter that does not discount low frequency noise as
much as the A -weighted decibel scale. As a result, a -weighted decibel measurement could be significantly higher
than an A -weighted decibel measurement if the noise being measured contains a heavy low frequency content.
Measurements conducted utilizing the C -weighted decibel scale are denoted with an "(C)" or "C" after the decibel
abbreviation (dB(C) or dBC). C -weighted noise level limits are sometimes included in noise regulations as a way to
address low frequency environmental noise issues.
Decibel (dB)
The basic unit of measurement for sound level.
Equivalent -Continuous Sound Level (Leg)
The average sound level measured over a specified time period. It is a single -number measure of time -varying noise
over a specified time period. It is the level of a steady sound that, in a stated time period and at a stated location, has
the same A -Weighted sound energy as the time -varying sound. For example, a person who experiences an Leg of 60
dB(A) for a period of 10 minutes standing next to a busy street is exposed to the same amount of sound energy as if
he had experienced a constant noise level of 60 dB(A) for 10 minutes rather than the time -varying traffic noise level,
It is measured in decibels, dB.
Fast Response
A setting on the sound level meter that determines how sound levels are averaged over time. A fast sound level is
always more strongly influenced by recent sounds, and less influenced by sounds occurring in the distant past, than
the corresponding slow sound level. For the same non -steady sound, the maximum fast sound level is generally
greater than the corresponding maximum slow sound level. Fast response is typically used to measure impact sound
levels.
Glossary of Acoustical Terms
Behrens and Associates, Inc.
Environmental Noise Control
Frequency
The number of oscillations per second of a sound wave
Insertion Loss
The decrease in sound power level measured at the location of the receiver when an element (e.g., a noise barrier) is
inserted in the transmission path between the sound source and the receiver.
Inverse Square Law
A rule by which the sound intensity varies inversely with the square of the distance from the source. This results in a
6dB decrease in sound pressure level for each doubling of distance from the source.
Noise Reduction
The difference in sound pressure level between any two points.
Octave
The frequency interval between two sounds whose frequency ratio is 2. For example, the frequency interval between
500 Hz and 1,000 Hz is one octave.
Octave -Band Sound Level
For an octave frequency band, the sound pressure level of the sound contained within that band.
One -Third Octave
The frequency interval between two sounds whose frequency ratio is 2111 /3). For example, the frequency interval
between 200 Hz and 250 Hz is one-third octave.
One -Third -Octave -Band Sound Level
For a one -third -octave frequency band, the sound pressure level of the sound contained within that band.
Point Source
A source that radiates sound as if from a single point.
Receiver
A person (or persons) or equipment which is affected by noise.
Sound Level Meter (SLM)
An instrument used for the measurement of sound level, with a standard frequency -weighting and standard
exponentially weighted time averaging.
Sound Power Level
A physical measure of the amount of power a sound source radiates into the surrounding air. It is measured in decibels.
Sound Pressure Level
A physical measure of the magnitude of a sound. It is related to the sound's energy. The terms sound pressure level
and sound level are often used interchangeably.
Glossary of Acoustical Terms
ehrens and Associates, Inc.
Environmental Noise Control
Sound Transmission Class (T)
A single number rating used to compare the sound insulation properties of walls, floors, ceilings, windows, or doors.
This rating is designed to correlate with subjective impressions ofthe ability of building elements to reduce the overall
loudness of speech, radio, television, and similar noise sources in offices and buildings.
Spectrum
The spectrum of a sound wave is a description of its resolution into components, each of different frequency and
usually different amplitude.
Tone
A sound with a distinct pitch
Transmission Loss (TL)
A property of a material or structure describing its ability to reduce the transmission of sound at a particular frequency
from one space to another. The higher the TL value the more effective the material or structure is in reducing sound
between two spaces. It is measured in decibels.
Windscreen
A porous covering for a microphone, designed to reduce the noise generated by the passage of wind over the
microphone.
Glossary of Acoustical Terms
PLANNING COMMISSION AND BOARD OF COUNTY
COMMISSIONERS' SIGN POSTING CERTIFICATE
THE LAST DAY TO POST THE SIGN IS JULY 24, 2020. THE SIGN SHALL BE POSTED
ADJACENT TO AND VISIBLE FROM A PUBLICALLY MAINTAINED ROAD RIGHT-OF-WAY. IN
THE EVENT THE PROPERTY BEING CONSIDERED FOR A SPECIAL REVIEW IS NOT
ADJACENT TO A PUBLICALLY MAINTAINED ROAD RIGHT-OF-WAY, THE DEPARTMENT OF
PLANNING SERVICES SHALL POST ONE SIGN IN THE MOST PROMINENT PLACE ON THE
PROPERTY AND POSTA SECOND SIGN AT THE POINT AT WHICH THE DRIVEWAY (ACCESS
DRIVE) INTERSECTS A PUBLICALLY MAINTAINED ROAD RIGHT-OF-WAY.
I, KIM OGLE, HEREBY CERTIFY UNDER PENALTIES OF PERJURY THAT THE SIGN WAS
POSTED ON THE PROPERTY AT LEAST TEN DAYS BEFORE THE PLANNING
COMMISSIONERS HEARING AND THE BOARD OF COMMISSIONERS HEARING FOR A SITE
SPECIFIC DEVELOPMENT PLAN AND USE BY SPECIAL REVIEW, UBR20-0013, FOR OPEN
MINING (SAND, GRAVEL AND STONE) MOBILE MINING EQUIPMENT PARKING AND
STORAGE AND EMPLOYEE AND VENDOR PARKING NG OUTSIDE OF SUBDIVISIONS AND
HISTORIC TOWNSITES AND WITHIN THE 1-25 REGIONAL URBANIZATION AREA AND THE A
(AGRICULTURAL) ZONE DISTRICT
KIM OGLE
flame of Person Posting Sign
Sig rQ ture f Person Posting Sign
STATE of COLORADO )
ss.
COUNTY OF WELD )
The foregoing instrument was subscribed and sworn to nee this rv. day of r' , 2020
WITNESS my hand and official seal.
lite! Sint
Notary Public
My Commission Expires: (6ittee?7;riq
KRISTIfVE RANSLEM
NOTARY PUBLIC
STATE OF COLORADO
NOTARY ID 20124034827
MY COMMISSION EXPIRES JUNE 05, 2024
EXHIBIT
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Public hearings concerningpoperty will be heard
County Planning ommission and
before the
Board of County hearings Commissioners,
Both
s win be held at:
WELD COUNTYADMINISTRATION BUILDING
1150 "0" Street • Greeley,
Planning Commission Hearin
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4
214. at Nate
Board of County Coirlifil reFinila.c. Hearing will be held on
Applicant:
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Request: Site Specific Development Plan and Use b Special
Review, USR2o-0013, for open minim
and stone) mobile� (sand, gravel
— �mining equipment parking and
storage and employee and vendor parking outside
_ of �ub�ir�isasubdivisionsand historic�rt� tow
nsrtes and Within
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the A
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Case Number:
Acres
FOR FURTHER INFORMATION AT(ON PLFASE `O{
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Both heartrigs will ne herd Pt
WELD COUNTY ADMINISTRATION BUILDING
1150 r'0" Street • Greeley, C
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Pian,iing Commission Hearing will he head on
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Case Number :k .� .fr. � el' , '"F". i'
Acres -
FOR FURTHER T,HER INFQR MATiON PLEASE CONTACT
N.TACT
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PLANNING SERVICES, AT .97th-400-`'a�'°,, `.•i
For dditondi Inform 9tfon visit .x eldcoLirit)p,larntiiic $oS.trg
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1150 "0" Street • Greeley, Co 80631
Planning Commission Hearing will be held on
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FOP FUPTHEE INFORMATION PLEASE COiNTAOT
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PW Comments 7.29, 2020
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Division of Reclamation,
Mining and Safety
Department of Natural Resources
1313 Sherman St. Room 215
Denver, CO 80203
May 15, 2020
Mr. Mark Johnson
Best ay Concrete Company
301 Centennial Dr.
Milliken, CO 80543
Re: The Shores, Permit M1998-013, Amendment Approval, Revision AMO3
Mr. Johnson:
On May 15, 2020 the Division of Reclamation, Mining and Safety approved the Amendment application submitted to the
Division on February 5, 2020, addressing the following:
Addition of140,7 acres to permitted area and modib mining and reclamation plans accordingly
The terms of the Amendment AMO3 approved by the Division are hereby incorporated into Permit M1998-013. All other
conditions and requirements of Permit M1998-013 remain in dull force and effect.
The revised liability amount exceeds the performance bond currently held (see below), therefore, please submit the additional
required bond. The revision will not be final until the bond is approved by the Division.
Bond Held: $889,177.00
Change its Liability:
Revised
Liability:
If you have any questions, please contact me.
Sincerely,
Eric C. Scott
Environmental Protection Specialist
$2,550,323.00
$3,439,000.00
1313 Sherman St. Room 215 Denver, CO 80203 P (303) 866-3567 F (303) 832-8106 https: / /colorado.gov/drms
Jared Polls, Governor I Dan Gibbs, Executive airecta' I Virginia Brannon, Director
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SIGN PLAN
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323 Sth STREET
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FA.EVE41O( CD 805.30
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VOGL GRAVEL MINE
GRAVEL MINE AMENDMENT
WELD COUNTY COLORADO
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8
EU RNCO Coiora • o, LLC/Bestway
Concrete & Aggregates
yogi Gravel Mine
Use By Special Review
20-0013
Weld County Planning Commission
August 4, 2020
EXHIBIT
Project Location
: s
?dr::- AMENDED VOGL
PARCEL —'
" EXISTING SHORES
GRAVEL MINE
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WCR 24.75
PROPOSED
'OGL GRAVEL
MINE
SHORES
GRAVEL MINE
Existing Conditi
WCR 26
ns
• the Site is located north
of Firestone Colorado
and adjacent (south) to
the St. Vrain River and is
in unincorporated Weld
County. The existing
Shores Gravel Mine is
directly south.
key p
Existing Conditions
Aerial Photo
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Existing Conditions
Aerial Photo
BURNCO Colorado, LLC/Bestway (BURNCO)
• BURNCO/Bestway and its subsidiaries have been in
operation for more than 47 years in Weld County.
• BURNCO/Bestway currently operates 5 mines and 5 concrete
plants in Weld County with approximately 150 -175
employees.
• BURNCO/Bestway has contributed to the development of
reclaimed water storage vessels, made available to various
municipalities and water providers in the area, in
conjunction with their reclamation plans.
• BURNCO/Bestway plans to invest in Weld County Gravel
Development with smart up to date mining techniques and
the ability to provide valuable reclamation at their gravel
mines.
Project Description
• Historic mine (mining ceased years ago due to market
conditions) located nortitip and adjacent to the Shores Gravel
mine and many historic gravel' mines in the County.
• Mine ^'160 Acre site north of WCR 26.
• Construct a 6,000 linear foot slurry wall.
• Extract 3 million to 4 million tons of aggregate. Max truck
120 trips per day (12 hour day) for overburden and topsoil
haul off only.
• Full time water truck and dust suppression.
• Reclaim the site for open water storage and agricultural
land.
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Mining Plan
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PROPER' `e
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DRMS PERMIT
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CONVEYOR'
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Y'I/CR 11 25
OCR 24.75
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Required Permits
112 Reclamation Permit
(DRMS- Complete)
• Use by Special Review (Weld
County)
• Air Pollution Emission
Notices (CDPHE-Complete)
• Colorado Discharge Permit
System/Storm Water Plan
(CDPH [-pending)
• Road Maintenance
Agreement (Weld County)
• Spill Prevention, Control and
Countermeasures Plan (EPA
—Complete)
• Army Corp Permits
(complete).
• State Engineers permits
(future).
S
•Approximately 3.5 million tons of resource
available.
• Mine 400,000 to 550,000 tons/year.
• Mine in ^'20 acre or less section if markets
conditions demand aggregate.
• Proposed to conveyor gravel material over WCR
11.25 and WCR 26 to the existing Shores Gravel
Mine, south of the yogi Property. This will limit
impacts as existing plant site will be utilized for
processing.
-Aar Jae
Reclamation
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SHORES RECLAIM ECG
GRAVEL MINE -POND D
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SHORES RECLAIMED
GRAVEL MINE -POND E
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•
Maintain the Site per Weld
County, MSHA and the
DRMS.
eed Control Plan.
• Replant in native grasses or
as dryland wheat.
• Site developed with -in Weld
County and local codes.
• Final use open water
storage, used for irrigation,
recreation, exchange, and
augmentation (final acre -
footage 1200 ac -ft, "'400
million gallons).
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