HomeMy WebLinkAbout20210238.tiffSignature: Garner or Authorized Agent Date
DEPARTMENT OF PLAITING SERVICES
1555 N 171h Ave, Greeley} CO 80631
Phone (970) 400-6100 Fax (970) 304-0498
USE BY SPECIAL REVIEW (MINING OPERATION) APPLICATION
FOR PLANNING DEPARTMENT USE DATE RECEIVED: _
RECEIPT # /AMOUNT # / CASE ## ASSIGNED:
APPLICATION RECEIVED BY PLANNER ASSIGNED:
To be completed by APPLICANT is accordance with procedural guide requirements:
1. I (we), the undersigned, hereby request a hearing before the Weld County Planning Commission concerning a
proposed Indust, proppant said (gravel, coal, borrow pit, etc.) mining operation for the following described
unincorporated area of Weld County:
Legal Description See Attachment Bib
Section Township North, Range 'West
Flood Plain: NiA Zone District: Agricultural , Total Acreage: 2,215,59 , Overlay District: NIA
Geological Hazard: NIA , Airport Overlay District: "
2. Surface owner(s) of area of land described
Name; See Attachment B�1 b Address: Phone:
Name: Address: Phone:
. Owner(s) of mineral rights or substance to be mined
Name: Sea Attachment Bald
Name:
Address
Address:
4. Applicant's name: Black Fountain Sand Weld LLD
Phone:
Phone:
Email Address blackmtnweld@blackrntn.com
Address: 500 Main Street, Suite 1200, Park Worth, T 76102 Phone: (830) 708-0288
Identify any prior permits for mining held by applicant or affiliated person:
N/A
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. Signatures of all fee owners
of property must sign this application. If an Authorized Agent signs, a letter of authorization from all fee owners must
be included with the application. If a corporation is the fee owner, notarized evidence must be included indicating that
the signatory has to legal authority to sign for the corporation.
Signature: Owner or Authorized Agent Date
ATTACHMENT B� 1D
psi
ai;
OWNERS OF SUBSTANCE TO BE MINED
Owners of Substance to be Mined
Black Mountain Land Company, LP owns the mineral rights to the substance to be ruined for all lands
currently owned by Black Mountain Land Company, LP. See attached letter from Black Mountain Land
Company, LP granting access to Black Mountain Sand Weld LLC for the purpose of building and
operating an industrial proppant sand mire and associated processing plant
Paul G Allen owns the mineral rights to the substance to be mined for all lands currently owned by Paul
G Allen. See attached letter from Paul G Allen granting access to his owned lands, which provides access
to the mineral rights as well. Black Mountain Land Company! LP is currently in discussions with Paul G
Allen to purchase the land and underlying mineral rights; the agreement is scheduled to be finalized
before July 10, 2819. Once this purchase has been finalized and closed, proof of ownership for those
lands and mineral rights will be provided.
Wage Weld County:
Use by Special Review for Mining Operations
BLACK MOUNTAIN
500 Main Street. Suite 1200, Fort Worth, TX 76102
(817) 698-9901
June 3, 2019
To Whom It May Concern;
Black Mountain Land Company, LP. hereby grants access to Black Mountain Sand Weld LLC to the rands
outlined in Attachment A for the purpose of bulb:ling and operating an industrial proppant sand mine
and associated processing plant.
Signed and dated this 34 day of 1:4•01, Q�
Black Mountain Land Company, LP Representative Signature
Black Mountain Land Company, LP Representative Name
reel&
Title
State of 1, ytt_
County of --fad tritettr
a
The foregoing instrument was acknowledged before me this
'NA1- ikvuat,*4r
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01 Tv „Arnim ExpErie C4444022
iviv% Notary ID 120045180
2019_
day of. lealtAkekes,r � joi 61 by
of TRai[.tit_ MoLotd-stheL Laidetd �, L.P •
fll
Notary Public
My Commission expires: _U�-01
Q5/21/2019 Tra 161 FAL P74302900Z RATHERINEI ALLEN, Sic
r
BLACK MOUNTAIN
Dear Mrs Paul Allen
Per our real estate contract agreement signed 1/3012019, and later emended on 4141201% we are
scheduled to clam on your property described in °Exhibit Al, on 711orloial Prior to closing we
wish to submit a sand miming permit to the Stole of Colorado, pOrtion of the mining area fells
within the property under contract. Therefore, we are requesting your formal permission to
include a porton of the contracted property within our mining permit,
By signing below, you agree that. Black Mountain Land Company, LP Is granted camas to the
proms described in Exhibit A for the purposes of testing, earn pling l and other activities es
needed In support of Black Mountain's pending mine permit application and the operatIOn of �
sand nine& until such time as that property la formally conveyed to Black Monts n Land Company,
LP.
a len
Landowner
THE STATE OF COLORADO $
COUNTY OF WELD
The foregoing instrument was acknowledged before errs by Paul Mien, Landowner,
ny Whereat I have hereunto set my hand end dial seat MIT day at
LAURIE DEE BIBBEY
Stite 01 COeoracT0
Notary ID 201340301
L oitt ninien: L)ip _ ti.5 06.16.20W 1
y Pu b'F Ic y Stets of Cobras
° Toll 1317.01.990i
Pet Ilitial 902
OW Mtn Streit, Suite 1200
Fort Worth, Totes 70102
�Iacknnin,aorn
05/n12919 Ti,18 16i 10 PAX 97035215112 KATHERINE ALLEN, PC
uUSi IJ
ate MOUNTAIN
rs.-servediV
Rhatt Bennett
Managing Member
The forecoing Instrument was acknowledged before me by Rhett Bennett, Managing
Member of Blenk Mountain Energy LLC, the Garland Ramer of Black Mountain Land Company,
LP*
In Testimony Whereof, I hive hereunto eet my hand and official seal, thb 2-26ay of
zod.
4 SUSANNA MCMAHAN
✓ p ,F` ',,�, r Notary Public, state or Texas
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a, `,.•' ti Comm. Expires 02-08.2020
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bus 117a ailliO2
500 MINI 6Ifell, Suite 1240
FOrtiNiarilio Tett§ rag 02
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tr}i BLACK MOUNTAIN
Attachment B-2
Black Mountain Sand Incorporation Documents
a. Certificate of Formation, Black Mountain Sand Weld FhC
a. Statement of Foreign Entity Authority
c. Colorado Division of Reclamation, Mining and Safety Approval of Transfer of Mineral Application
and Succession of Permit Applicant
Weld County:
Use by Special Review for Mining Operations
Delaware
The First State
I, JEFFREY W. BULLOCK, SECRETARY OF STATE OF THE STATE OF
DELAWARE, DO HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT
COPY OF THE CERTIFICATE OF FORMATION OF "BLACK MOUNTAIN SAND
WELD LLC `f , FILED IN THIS OFFICE ON THE THIRTIETH DAY OF MAY,
A.D. 2019, AT 6:01 O'CLOCK P.M.
7443689 8100
SW120194953109
Page 1
Authentication: 202931082
Gate: o5 -3O-19
You may verify this certificate online at carp.delaware.goviauthver.shtml
State of Delaware
Secretary of State
Division of Corporations
Delivered 06 Al PM 06'30'2019
CERTIFICATE OF FORMATION FILED 06:91 PM 05:3o�` O19
OF SR O19499109 - File Number 744390'
BLACK MOUNTAIN SAND WELD LL
I, the undersigned natural person of the age of eighteen gars or rnore, acting as an
authorized person of a limited liability company under the Delaware Limited Liabilility Company
Act, as amended, do hereby submit the following Certificate of Formation for such limited
l ahi l.it co pa.ny:
ARTICLE 1
The name of the limited liability company is Black Mountain Sand Weld LLC,
ARTICLE 2
The address of the limited liability company's initial registered agent in the State of
Delaware is 850 New Burton Road, Suite 201, Dover, DE 19904. The nacre of its initial
registered agent at such address is Cogency Global Inc.
ARTICLE
The name and address of the organizer of the limited liability company are as follows:
Name Address
2019,
Christopher M, Stoltz
550 W. Texas Avenue, Suite 800
Midland, Texas 79701
IN WITNESS WHEREOF, l have hereunto set my hand effective the 30th day of May,
Christopher . to-ltz, Authorized ' tsrson
HAIDOC:S 59071 GInk Mcurtain Sand %Wm -lily LitniOack Mountain Saud Weld LI.,C = Certificate or'Faring inadae
State Of Delaware
Name Reservation Status
i
i
Reservation
Name
Entity
Name
Entity
Type
Cost
Status
Expiration
Date
7443689
Black
Mountain Sand Weld
LLC
.,.
Limited
,
iabilityCompa
,
$75.00
Reserved
9/27/2019
Document must be file. electronically.
Paper doc; u.mentLs are not accepted.
Fees & forms are subject to change.
For more information or to print copies
of filed documents, visit www.sos.state.co.us.
Colorado Secretary of State
Date and Time: 05/31/2019 03:53 PM
III Number: 20191460011
Document number: 20191460011
Amount Paid: $100.00
ABOVE SPACE FOR OFFICE USE ONLY
Statement of Foreign Entity Authority
filed pursuant to § 7-90-803 of the Colorado Revised Statutes (C.R.S.)
1. The entity ID number, the entity name, and the true name, if different, are
Entity ID .number 20191460011
(Colorado ..S'ecretar y of State ID nu nbet)
Entity name Black Mountain Sand Weld LLC
True name
(if different from the entity name)
2. The form of entity and the jurisdiction under the law of which the entity is formed are
Form of entity Foreign Limited Liability Company
Jurisdiction Delaware
3. The principal office address of the entity s principal office is
Street address 500 Klein Street
Suite 1200
Mailing address
(leave blank if carne as street address)
(Street number and name)
Fort Worth
(City)
(Province— if applicable)
TX 76102
(State) (Z1P/ octal Code)
United States
(Country)
(Street number and name or Post Office Box in finnation)
(City)
(Province— rf applicable)
(State) (ZIP/Postal Code)
(Country)
4. The registered agent name and registered agent address of the entity's registered went are
Name
(if an individual)
or
(if an entity) COGENCY GLOBAL INC.
(Caution: Do not provide both an individual and an entity Aare.)
(First)
.
(Middle) 6.90,7%x)
AUTHORITY
Date 1 of 3 Rev. 12/01/2011
(Last)
Street address
Mailing address
7700 E ARAPAH E RD STE 220
(Street number and name)
Centennial CO 80111
(City)
(State)(ZIP Code)
(leave blank if same as street address) (Street dumber and ttcrme or Past Office Box information)
(7 healowing statement is adopted by marking the box.)
The person appointed as registered agent above has consented to being so appointed.
(City)
CO
(State) (ZIP Cade)
5. The date the entity commenced or expects to commence transacting business or conducting activities in
Colorado is 06/03/2019
(mmiddl?.1yy)
6. (If "applicable, adopt the Ibllowing statement by marking the box and include an attachment.)
❑ This document contains additional information as provided by later.
7. (Caution: Leave blank if the document does not have a delayed effective cute. Stating a delayed effective date has
significant legal consequences. Read instructions before entering a date)
(If the following statement applies., adopt the .statement by entering a date and., "applicable, time using the required, f rrnat)
The delayed effective date and, if applicable, time of this document is/are
Notice:
(truniddlyyyy hour:minute dm pm)
•
Causing this document to be delivered to the Secretary of State for filing shall constitute the affirmation or
acknowledgment of each individual causing such delivery, under penalties of perjury, that the document is the
individual's act and deed, or that the individual in good faith believes the document is the act and deed of the
person on whose behalf the individual is causing the document to be delivered for filing, taken in conformity
with the requirements of part 3 of article 90 of title 7, C.R. ., the constituent documents, and the organic
statutes, and that the individual in good faith believes the facts stated in the document are true and the
document complies with the requirements of that Part, the constituent documents, and the organic statutes.
This perjuty notice applies to each individual who causes this document to be delivered to the Secretary of
State, whether or not such individual is named in the document as one who has caused it to be delivered.
8. The true name and mailing address of the individual causing the document to be delivered for filing are
Bennett Rhett
(Last)
500 Main Street
(First)
.
(Middle)
(Street number and name or Post Office Box in formation )
,wits 1200
Fort Worth
(City)
TX 76 102
(State) (ZIP/Postal Code)
United States .
(Province — if applicable) (County, )
(if 'the Mlolving statement applies, adopt the statefnent by marking the box and include an attachrnent)
This document contains the true name and mailing address of one or more additional individuals
causing the document to be delivered for filing.
AUTHORITY
Page 2 of 3 Rev. 12/01/2011
Disclaimer:
This form/cover sheet} and any related instructions, are not intended to provide legal, business or tax advice,
and are furnished without representation or warranty. While this form/cover shut is believed to satisfy
n inirnum legal requirements as of its revision date, compliance with applicable law, as the same may be
amended from time to time, remains the responsibility of the user of this form/cover sheet. Questions should
be addressed to the user's legal, business or tax advisor(s).
AUTHORITY
Page 3 of 3 Rev. 12/01/2011
AS
a
June 11, 2019
COLORADO
Division of Reclamation:
Mining art d Safety
Department of Natural Resources
1313 Sherman Street, Room 215
Denver, CO 80203
Jacob Smith
Black Mountain Sand. Weld. LL1
500 Main St, Suite 1200
Fart Werth, TX 79102
Re: Lost Creek Mine, File No. M-2018-051, Approval of Transfer Mineral application and
Succession of Permit Applicant, Revision No. -1
Dear Mr. Smith:
On June 11, 2019, the Division of Reclamation, Mining and. Safety approved the succession of operators from
Black Mountain Sane DJ LLC to Black Mountain Sand. Weld. LLC for this permit application 1n review.
Black Mountain Sand Weld LLC is now the approved application holden of the Lost Creed. Mine.
The transfer of this permit does not result in the transfer of any other permit or license, with this
Division, the State, or Federal Agency, which night be associated_ with this. operation.
If you have any questions, contact nee.
Sincerely,
Eveetema emeet Ott
Peter S. Hays
Environmental Protection Specialist
cc: Michael Cunningham., Division of Re lama:tion, Mining and Safety
Rick Steiskal, Black Mountain Sand DJ LLC
1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 [IUDs:iimining.state.co.us
Jared Polls, Governor Dan Gibbs, Executive Director Virginia Brannon, Director
i
BLACK MOUNTAIN
500 Main Street. Suite 1200, Fort Worth, TX 76102
(817) 698-9901
June 3, 2019
To Whom It May Concern;
Black Mountain Land Company, LP. hereby grants access to Black Mountain Sand Weld LLC to the rands
outlined in Attachment A for the purpose of bulb:ling and operating an industrial proppant sand mine
and associated processing plant.
Signed and dated this 34 day of 1:4•01, Q�
Black Mountain Land Company, LP Representative Signature
Black Mountain Land Company, LP Representative Name
reel&
Title
State of 1, ytt_
County of --fad tritettr
a
The foregoing instrument was acknowledged before me this
'NA1- ikvuat,*4r
as Oa)
x srflDote ry PubI I o i 6t9 of Texas
01 Tv „Arnim ExpErie C4444022
iviv% Notary ID 120045180
2019_
day of. lealtAkekes,r � joi 61 by
of TRai[.tit_ MoLotd-stheL Laidetd �, L.P •
fll
Notary Public
My Commission expires: _U�-01
Attachment A
Section 2:
Section 3:
Section 10:
Section 11
Section 14:
5W1/4
All
SW 1/'4; W Y2 SE X;
EXCEPTING THEREFROM parcels of land conveyed to Morgan County Quality Water District
by suit Claim Deed recorded December 5, 1977 in Book 816 at Reception No. 1737637 and
Confirmation and Ratification Deed recorded April 24, 1990 in Boob 1252 at Reception No.
2211677, and Special Warranty Deed recorded July 21, 2000 at Reception No. 2781945,.
described as follows: A tract of land located in the West 1/2 of the Southeast 1/4 of Section
10, more particularly described as follows: Beginning at a point on the South line of said
Section 10, which is 1320 feet West of the Southeast corner of said Section 10, and
considering the South line to bear North 90°00'00" West; thence West along the South line
of Section 10, a distance of 313.07 feet; thence North 208.71 feet; thence East 31 3.07 feet;
thence South 208.71 feet along the East line of the West 1/2 of the Southeast 1/4 of
Section to to the Point of Beginning, ALSO, atract of band 30 feet in width, 15 feet on each
side of the centerline of the pipeline as installed in Section 10, Township 3 North, Range 51
West of the 6th P.M., to be used as an access road to operate and maintain the water
storage tank, situated upon the above described lands and said pipeline.
All,
EXCEPT that portion thereof described in Book 1505 at Page 525.
That part of the N 1/2 described as follows:
BEGINNING at the Northeast corner of said Section 14;
thence West, along the North line of said Section, 5280 feet, more or less, to the Northwest
corner thereof;
thence South/ along the West line of said Section, 2422 feet, to the centerline of U.S.
Highway; No. 5;
thence North 55°39' East, along said highway centerline, 5138 feet;
thence, along said highway centerline, on a 2°curve to the right, 556 feet to the East line of
said Section;
thence Norte, along the East line of said Section, 147 feet to the POINT OF BEGINNING,
EXCEPT those portions thereof described in Book 987 at Page 258, and Book 1505 at Pages
513, 517 and 525,
BLACK MOUNTAIN
r a iVr..
1
s 'L k
ATTACHMENT Dal w
QUESTIONNAIRE RESPONSES
Included below are Black Mountain Sand Weld LLC's (Black Mountain) responses to the weld County Use by
Special Review (USR) Questionnaire for the Lost Creep Mine (Facility). Many of these questions are also
answered in the Mining Plan (Exhibit D) and Reclamation Plan (Exhibit E) documents submitted to the
Colorado Division of Reclamation, Mining and Safety (CDRMS) as part of The Lost Creep Mine Construction
Materials Regular 112 !operation Reclamation Permit Application Amendment M-2018-051 in June 2019,.
which has been attached to this USR application as Attachment K. All referenced confidential attachments
are included in Attachment D -1b.
1. A detailed description of the method of mining operation.
Black Mountain plans to construct and operate Lost Creep Mine, a 2.4 million ton per year (Mtpy)
industrial proppant sand production facility in weld County, Colorado. It will consist of an open pit raining
operation, sand gash processing plant and associated loadout facility located on 2,215.59 acres of
private land. This includes approximately 1,796 acres of affected land for mining activities, processing
plant and associated facilities, and the access road. The Facility will be accessed using weld County Road
(WCR) 91, which runs north- south along the west side of the project area. Utilities, including gas, water,
and electric, will be brought to the area. The affected lands boundary has been offset at least 299 feet
from the permit boundary, ensuring a buffer area between the active project area and neighboring lands.
Additional buffers are included in the Facility design around the processing plant area, and wCR 91.
These buffer areas will consist of undisturbed land covered in natural vegetation. The lands designated
for disturbance have specifically been designed so no disturbed land overlies portions of the Hay Gulch
Alluvial Aquifer within the permit boundary of Section 10.
The Facility will produce industrial proppant sands over approximately a 3 -year period, raining reserves
in yearly blocks with concurrent reclamation. Black Mountain has requested bonding in approximately
10 -year phases to ensure the bond is sufficient to cover the then current raining, reclamation, and site
conditions. The requested bonding schedule is provided in Attachment K (Exhibit E, Reclamation Plan,
Table E1). Material will be excavated from the pit using excavators, dozers and front-end loaders. No
blasting is expected to be required. Trucks will be used to transport all mined materials to the sand wash
processing plant. In later years, a closed loop slurry pipeline may be used. It is estimated that on average
approximately four mining trucks will be required in gears 1-10, increasing to approximately seven raining
trucks after year 10. All rained material will report to the sand wash processing plant for separation and
beneficiation. Product will be stored in silos for loading and transport. Operations will be conducted using
appropriate Best Management Practices (BMPs) for storm water control, ,ground water protection, and
fugitive dust mitigation.
a. The types and numbers of structures that will be erected (built) on site including operation and
processing equipment to be employed.
The processing plant is approximately 45 acres and access will be located off WCR 91 at
approximately 40* 14' 49.00" N and 104° 12' 24.50" W. It will include approximately 2,800 linear feet
(3.0 acres) of paved road and 1.3 acres of impervious surface for parking areas. The remainder of the
facility will be used for constructed buildings and associated facilities or left as native vegetation
Wage WeVu Cou nay:
Use by Special Review for Mining operations
BLACK M.OU IN MINI
ATTACHMENT Dal:
QuESTIONNAIRE RESPONSES
buffer areas. The mine pits have been designed more than Zoo feet from the edge of the processing
plant area boundary (buffer areas). This processing plant buffer area will consist of undisturbed
native vegetation that stormwater runoff will be directed to and/or discharged to from the settling
pond, as needed.
The sand wash processing plant will consist of a plant feed storage pile, scrubbing, cyclonic
separation, product dewatering, fines thickener, fines dewatering, a process water storage tank,
process water pond, slurry pond, belt conveyors, wet sand storage building, belt tripper, scrapper
reclaimers, dual fluid bed dryers, dry screening, six 3,000-tonstorage silos for final product storage
and a backfill stockpile. Additionally, there will be a paved 3 -lane truce loadout area, office building &
parking lot, a maintenance and warehouse building, a fueling station and ready line, check -in booths,
and truck hatch opening and closing stations included at the facility. The fueling station will contain
one 50,000 -gallon fuel tank during the early life -of -mine operations and a maximum of three 50,000 -
gallon fuel tanks during later life -of -mine operations. This fuel will be used for all mobile mine
equipment, including mine haul trucks and dust abatement trucks.
b. The number of shifts to be worked and the maximum number of employees.
The facility will employ approximately 145 personnel in three shifts, which include approximately 55
Dourly and/or salaried personnel at the mine and approximately 80 hourly and/or salaried personnel
for the sand wash processing plant.
c. Whether the operation will involve a wet or dry pit
The operation will involve a dry pit. It is not anticipated that the raining operations will encounter
groundwater in the miring pits. The mine plan has been designed to keep mining activities at least
two feet above the (known water table for each phase of mining, as recommended by the Colorado
Division of Dater Resources. If encountered during mining operations, Black (Mountain will backfill
the pit to two feet above the encountered water and modify its pit depth to remain at least two feet
above the new water table level. Water levels taken from monitoring wells installed as part of Black
Mountain's groundwater monitoring program, as discussed in Attachment K (Exhibit E, Reclamation
Plan, Section 3.1.7), will be used to track and define the known water table throughout the life of the
mine.
Berms at the top of the active reining areas will be used to direct stormwater runoff away from the
active pit. Small operational settling ponds will be used to temporarily hold any stormwater runoff
that gathers in the pit area. If needed, stormwater will be removed through small pit sumps using a
pump system that will be designed for the Facility. Settling ponds will be placed near the active
mining operations as necessary throughout the life of the mine and will be reclaimed as part of the
ongoing reclamation process as they are no longer needed. These settling ponds will be located far
enough from the pit to ensure pit stability. Water pumped from the pits will be inspected for
potential hydrocarbons and, if necessary, treated, and then water will be allowed to infiltrate or will
Wage Weld County:
Use by Special Review for Mining Operations
FLASK AilOUNTAI N SAND
ATTACHMENT Dal:
QUESTIONNAIRE RESPONSES
be discharged to nearby undisturbed buffer areas. Attachment K (Exhibit D, Mine Plan, Figure D2)
shows a typical cross section of the settling ponds.
d. County roads and bridges to be utilized, along with site entrance/exit points. (Coordinate with County
Engineer).
The main entrance to the mine is located at approximately 40° 14149.00" N and 104' 12' 24.50" w,
directly off WCR 91, within SE ICE of Section 10. WCR 91 is accessed from outside the Facility
boundary either from Hwy 34MCR 42 to the north or Hwy 6/I-76 to the south. Per the
recommendations of the Traffic Impact Study, which was completed in March 2019, WCR 91 will be
upgraded and paged from Hwy 34/WCR 42 south to 300 feet past the Facility{ entrance, a southbound
turn lane will be added at the intersection of WCR91 and the facility, a recovery approach lane will be
added at the intersection of US Hwy 34/WCR 42 and WCR 91 for northbound vehicles, and a turn lane
will be added on Hwy 34 for southbound vehicles. Additionally, Black Mountain has agreed to add a
turn lane going east off the intersection of WC R91 and US Hwy 34MC R 42 at the request of local
stakeholders. Black Fountain is currently in discussions for this upgrade with weld County personnel
and an Improvements Agreement is being drafted concurrently to the USR process. The nearby mine
pits have been designed at least 200 feet from the edge of the right-of-way of WCR 91,
Access from WCR 91 to the Facility will be via a new paved access road. Semi -trucks used to
transport industrial sand product from the Facility will access the Facility from Hwy 34MCR 42
south down WCR 91 to the Facility access road. This approximately 1,900 linear foot long access
road will include a paved 3 -lane truck loadout, check -in booth, truck hatch opening and closing
stations, and access to the parking lot for the office building. The access road has been designed
to include an access gate that is no less than 35 feet from the edge of the traveled surface and
at least 300 feet of asphalt or concrete pavement prior to the edge of the travelled surface for
access and tracking control, as required by weld County.
Please see Attachment E, Weld County Access Permit.
The size of the area and stages to be worked at any one time
The Extraction Plan Map, included as Attachment Cb, shows the estimated size and location of each
reining block (1 -year mining period) within the first 10M -year period. Mining of one yearly block at a
time is planned, with concurrent reclamation as practicable. The processing facility (approximately 45
acres) will be in use the entire life of the operation. As shown on the Extraction Plan Map, the land
will be mined sequentially, with concurrent backfilling as operations progress. As a pit backfill is
completed, it will be regraded and reclaimed in accordance with the approved reclamation plans. At
any given time, only one phase will be actively reined. With the concurrent reclamation it is not
anticipated that the entire area of any phase would be disturbed at any given time, since backfilling
will occur behind the active mining area of the pit. In total, approximately 1,796 acres will be
disturbed over the entire life of the mine. This includes approximately 45 acres for the processing
Wage ''Meld County:
Use by Special Review for Mining operations
BLACK M.OUNTAIN
ATTACHMENT Dal w
QUESTIONNAIRE RESPONSES
facility and 1,564 acres for ruining activities. The remainder of the disturbed acreage includes access
reads and other interior working areas of the Facility.
Please see the table below for an estimate of the total number of acres of disturbance for each year
of raining. Some years may overlap slightly as operations progress.
Year
Yr. 1 Yr. 2
Yr. 3
Yr. 4
Yr. 6
Yr. 6 Yr. 7
Disturbance (ac)
26.1
42.8
34.4
31.6
25.3
27.x'
26.0
Year
Yr. 8
Yr. 9
Yr. 10
Yrs. 11-
Yrs. 21-
Yrs. 31-
Total
20
30
35
Disturbance
continued
(ac),
23.1
22.7
21.5
400.2
416.0
666.7
1,664.2
f. A time table giving the periods of time and number of phases to be worked, which will be required
for the various phases of the operation.
As discussed above in Questionnaire Response 1.e, the mine will be operated in yearly blocks. One
block will be actively mined at a time, with concurrent pit backfiiling and reclamation. Please see the
table in 1.e, above, for details.
g. The depth and thickness of the mineral deposit to be mined and the thickness of overburden to be
removed.
Please see the Confidential Mining Plan Flap, included as Attachment D -1b, for the depth and
thickness of the mineral deposit to be mined.
The thickness of the overburden to be removed has been estimated and is calculated on Confidential
Table D3, Mining Operations Timetable, attached as Attachment D -1b.
h. The proposed use of reclaimed lands and an explanation of the reclamation process.
The entire affected land area will be returned to rangeland after reclamation in order to return the
property to ,pre -mining conditions as closely as possible.
Unsaleable product (based on size requirements) will be inert and used as backfill material in
previously mined areas and to backfill the ruining pit in phases. Earthmoving will be done primarily
with excavators, dozers, and front-end loaders. Compaction of backfilled material will be achieved by
`truck compaction' (a common surface ruining industry practice), as follows: Haul trucks will deposit
backfill material, which will include oversize and clay feldspar material from the sand gash processing
plant and backfill stockpile, as well as previously stockpiled overburden material into mined areas as
operations progress. That material will be deposited in layers as it is built up to its proposed post -
4I Page Weld County:
Use by Special Review for Mining operations
BLACK U T I N
1
ATTACHMENT Dal w
QuESTIONNAIRE RESPONSES
reclamation depth by front-end loaders and dozers which, by action of the traffic of wheeled and
tracked heaver equipment, will perform primary compaction as they prepare safe and efficient running
surfaces for the mining trucks and other equipment. As the trucks return bacicfill material into the
mined areas in 'lifts' or 'benches', it will form a highly trafficked zone that will effectively further
compact the backfilled material.
The backfilled and regraded topography will be tied -ire to undisturbed topography at slopes that will
be hydrologically stable. Given the small decrease in available backfill volume relative to the surface
areas of the project site and the generally level topography of the area, it is not anticipated that
outside fill material will be needed. If outside fill is deemed necessary, Black Mountain will follow all
requirements of Section 3.1.5(9) off the Colorado Mined Land Reclamation Act regarding importing
inert fill materials.
Once the backfilled and compacted materials reach their full depth, the area will be graded and
contoured to conform to the surrounding landscape and to provide hydrological stability. Final
proposed contours are shown on the Confidential Reclamation Flan Map, included as Attachment D -
lb. Stockpiled topsoil, augmented as necessary, will be spread over the area, the area will be disced or
ripped and then seeded with a weld County approved seed mix. Straw crimping will be completed per
Weld County's seeding recommendations. Reclaimed areas will not be irrigated. See Table below for
the proposed seed mix.
Table E2 Proposed Seed Mix
SEED TYRE
CORRESPONDING
SOILS
RATE OF
APPLICATION
Sand
Bluestem
Champ,
Chet
1.00 lbs
pis/acre
Sand
Lovegrass
Bend,
native,
Ne27
2.50 I
bs
pis/acre
Indicant
Ricegrass
Nezpar,
R mrock
3.00
Bibs
pis/acre
Prairie Sandreed
Goshen
0.75
lbs
plsiacre
Green
Needlegrass
Lodorm
1.50
lbs
pis/acre
Little
bluestem
Blaze,
Camper
Cimarron,
0.75 lbs
pis/acre
Yellow
Indiangrass
Cheyenne,
Hole,
Scout
0.50
lbs
pls/acre
5witchgrass
Blackwell,
Nebraska
28
1.50
lbs
pis/acre
Sand
Dropseed
0.50
lbs
pis/acre
Total
12.00 lbs
pis/acre
(https://www,weldgov.corn/UserFiles/Servers/Server f/File/Departments/Pu blic%20Works/Weed%20M
anagement/ControlI ing%20Weeds/Reseeding/3d6124CcBf054d89CcCD.pdf).
51 Page
Weld County:
Use by Special Review for Mining Operations
BLACK Ail O U N TA.I N SAND
ATTACHMENT Dal w
QUESTIONNAIRE RESPONSES
At the end of mine life, the processing facility will be demolished. Equipment will be cleaned as
needed with water and reused and recycled as much as possible. This will include the sand wash
processing plant and equipment, conveyors, silos, water storage tanks, and loadout facilities.
Warehoused materials and fuel will be removed as part of the demolition of the Facility. Fuel will be
removed from the storage tanks at the warehouse and fueling station, and the tanks will be cleaned
thoroughly before being dismantled.
Materials that cannot be recycled will be disposed in the process water pond and slurry pond. The
liners will be cut to prevent water ponding within the disposal area. The materials to be disposed will
include pavement, some concrete foundation materials, siding, supports, unused process feed or
product and other materials that cannot be recycled. The ponds will be filled and compacted and
regraded to conform to surrounding contours. Stormwater will be directed around the construction
material disposal. No outside material will be accepted for disposal. All mat slab foundations and
footings will be removed and all deep foundations will be buried in place.
The office building and warehouse building will remain in place for use in subsequent agricultural
operations at the site. Pavement to those buildings will remain in place.
Please see Attachment K (Exhibit E, Reclamation Plan) for more details.
The source of technical advice in that type of reclamation for open curt mining land.
The general reclamation techniques proposed for this project are typical of surface mining operations.
All affected lands will be returned to rangeland after reclamation.
Seeding of all affected lands will be completed using a weld County approved seed mix. The proposed
seed mix for this project is the weld County Sandy Site Mix. Seeding will follow the recommendations
set forth by Weld County and discussed in Question th, above and in Attachment K (Exhibit E,
Reclamation Plan).
Black Mountain intends to revegetate in ;general conformance to the surrounding lands.
2. A statement which explains how the proposal is consistent with the weld County Comprehensive Plan.
The Weld County Comprehensive Plan encourages the extraction of oil and gas resources that conserve
the land and minimize the impact on surrounding land and the existing surrounding land uses. The
proposed use is consistent with the intent of Weld County Code, Chapter 22 of the Comprehensive Plan
and any other applicable code provisions or ordinance in effect as outlined below:
• Section 22-2-10(D) emphasizes the `!Extraction of natural resources as an important part of the
economy of Weld County. Such extraction operations should minimize the impacts on agricultural
lands and agricultural operations.'
• Section 22 -S -100(A) states, "Promote the reasonable and orderly exploration and development of
oil and gas mineral resources."
• Section 22 -S -100(B) strives to, "Ensure that the extraction of oil and ,gas resources conserves the
6I Page Weld County
Use by Special Review for Mining operations
BLACK M.OU IN TAIN
ATTACHMENT Dal:
QUESTIONNAIRE RESPONSES
land and minimizes the impact on surrounding land and the existing surrounding land uses and
outlines the objective to, "Impose protective measures through available state, County and
federal regulations to ensure that the mineral operator conducts operations in a ,Wanner that will
minimize current and future environmental impacts."
• Section 22-2-10(A) states, "continue the commitment to viable agriculture in Weld County
through mitigated protection of established (and potentially expanding) agricultural uses from
other proposed new uses that would hinder the operations of the agricultural enterprises."
The proposed use would support expanding oil and gas extraction activities in the Region. Currently, sands
used for oil and gas extraction are transported from across the country as no local source for extraction
sands exists. The proposed proppant sand mine will contribute to the expansion of the County's economic
base by providing increased capacity for future oil and gas extraction.
The use of the land outside of the facility footprint shall remain unchanged, and reclamation of the mine
to the existing land use of rangeland, which allows for future potential agricultural use, thereby preserving
the current land use and future viability as agricultural land.
A► statement which explains horn the proposal is consistent with the intent of the district in which the
is located.
use
Mining operations in the A (Agricultural) Zone District require the approval of a USR Permit. The proposed
use is consistent with the intent of the A (Agricultural) Zone District in that reclamation of the ,nine will
allow for future agricultural use, thereby preserving future viability as agricultural land and consistency
with the A (Agricultural) Zone District.
4. If applicable, a statement which explains what efforts have been made, in the location decision for the
proposed use, to conserve productive agricultural land in the agricultural zone district.
N/A. No prime farmlands are located within the property boundary. The existing land use of the entire
property boundary is dry (non -irrigated) rangeland. The entire affected land area will be returned to
rangeland after reclamation to return the property to pre -mining conditions as closely as possible.
5. A statement which explains there is adequate provision for the protection of the health,, safety and
welfare of the inhabitants of the neighborhood and the county.
Please see Attachment K, CDRMS Regular 112 operation Reclamation Permit Application Amendment for
a description of plans and current and future permit compliance required to protect the health and safety
of future glad Mountain employees, as well as the surrounding environment, wildlife and community
members. Also see "Plans for obtaining water supplies for the mining operation" on Page 15 below for
information detailing the adequate provision for the protection of the health, safety, and welfare of the
inhabitants with regard to water issues.
Mage Weld County:
Use by Special Review for Mining operations
BLACK M.OU
ATTACHMENT Dal:
QuESTIONNAIRE RESPONSES
statement describing the existing surrounding land uses and explaining how the proposal will be
compatible.
Properties adjacent to the affected lands are unirrigated rangeland, with some agricultural fields in the
vicinity. The proposed post -mining land use of rangeland will return the affected area to its current land
use. Reclaimed land will be in general conformity to the surrounding land.
7. A statement describing the existing land use.
The existing land use of the entire property boundary in rangeland. After reclamation, the affected area
will be returned to rangeland. The office and warehouse buildings will remain in place to augment post -
mining rangeland land use operations at the site. The property will be returned the rangeland to its pre -
mining conditions as closely as possible.
Describe, in detail, the following:
al How many people (employees, visitors, buyers, etc.) will use this site?
An estimated 145 employees will' operate the site. This includes approximately 55 hourly and salaried
personnel at the mine, and an additional 80 hourly and salaried staff for the processing plant.
During construction, up to 12( contractors will be on site. Once in operation, truck drivers will lead
vehicles from the silos. An estimated 300 trucks with drivers will visit the site daily.
Customers and other visitors to the site would be negligible.
b. What are the hours of operation?
The mine and processing facility will operate 365 days per year, 24 hours per day. All processing
equipment will be located within fully enclosed buildings within the sand wash processing plant. There
will be no crushing equipment at the Facility. The use of blasting or explosives in conjunction with
construction, operations, or reclamation is not proposed.
c. What type and how many animals, if any, will be on this situ'
N/A; no animals will be on site.
d. What bind (type, size, weight) of vehicles will access this site and how often?
III traffic will access the site from the north via highway 34/WCR 42 to WCR 91.
Transport trucks will pick up sand product from the silos to be delivered to industrial customers. While
the enact type .and size is unknown, it is anticipated that trucks will tale a maximum of 25 tons of
product per load and will not need oversize load permits. It is anticipated that nearly all of the large
vehicles (semi -trucks with a maximum of 25 -ton loads) will be coming from and going to the west from
WCR 91. Product transportation will be ongoing throughout operating hours.
Wage Weld C:ou nty:
Use by Special Review for Mining Operations
BLACK U IN T I
ATTACHMENT Dal:
QUESTIONNAIRE RESPONSES
The highest traffic volumes will occur during shift changes for employees at 7 am, 3 pm and 11 pm.
These will mainly be passenger vehicles and light duty trucks for Facility employees. Customer and
other visitors to the Facility, while negligible, would also contribute to the volume of passenger
vehicles and light duty truck traffic to and from the site.
e. Who will provide fire protection to the site
Black Mountain has begun discussions with the Southeast Weld Fire Protection District, who will
provide fire protection services to the site.
f. What is the water source on the property' (Commercial well or water district).
The sand wash processing plant within the operation facilities will utilize water from existing water
wells on adjacent property owned by Black Mountain Land Company, LP. Water storage tanks and a
water line will be constructed from the wells to the Facility, as shown in Attachment K (Exhibit D,
Figure D4). Water pumped from the wells will be stored in fresh water tanks at the Facility. The sand
wash processing plant has been designed to recycle the majority of its water to minimize total water
usage,/loss through the use of filter presses, a specialized decanting system in the wet sand storage
building, and through a closed loop water system. A small amount of water loss will occur as the
over/undersize and clay/feldspar materials are removed from the plant and through evaporation
during final drying operations. Overall, the facilities will capture and reuse 95 of the water in its
system.
Since the water is already being withdrawn from the aquifer for agricultural use, and Black Mountain
is in the process of transferring the water rights to multiple use, there will be no new groundwater
impacts from water withdrawals as a result of the operation. Proof of multiple use will be provided as
soon as it is finalized
Potable water for the onsite drinking grater and sanitary system will be purchased from Morgan
County Quality Water District. Black Mountain is in the process of negotiating this agreement and will
provide once it is finalized.
Please refer to Attachment F for additional information of the water resources for the project.
g. 'That is the sewage disposal system on the property? (Existing and proposed).
There is no existing sewage disposal system at the site. Sanitary facilities have been included in the
design for both the office building and the maintenance/warehouse building.
The Facility is not within the boundaries of a municipality or special district that provides public sewer
services and there is no existing sewage disposal system at the site. A new onsite septic system and
leach field will be installed during the construction of the Facility and will only receive biodegradable
wastes from the sanitary system.
A Commercial onsite Water Treatment System (OWTS) Permit will be obtained from Wel
prior to installation.
d County
9I Page Weld County:
Use by Special Review for Mining operations
BLACK U IN rT I
ATTACHMENT Dal:
QUESTIONNAIRE RESPONSES
Please refer to Attachment G, Evidence of Adequate Sewage [disposal, for further details of adequate
sewage disposal at the Facility.
h. If storage or warehousing is proposed, what type of items will be stored'
An enclosed maintenance/warehouse building will be built as part of the sand wash processing plant
facilities. It will contain parts and supplies for the raining and processing operations, including but not
limited to surfactants used in the wet screening process, lubricants and machine cleaning solvents for
the processing equipment, lubricants and replacement fluids for fleet maintenance, general office
cleaning solvents and disinfectants, and miscellaneous maintenance supplies.
A 50,000 gallon above ground diesel fuel tank with secondary containment will be installed at the
fueling station during the initial construction phase. A maximum of two additional 50,000 gallon above
ground fuel tanks may be installed later during the life -of -mine operations as needed for fleet
management. Additional smaller diesel fuel storage tanks will be located inside the maintenance
shop/Warehouse building for small refueling and maintenance tasks related to fleet maintenance
activities. All fuel storage tanks will have secondary containment. A Spill Prevention Control and
Countermeasures (SPCC) plan will be in place for all fuel storage activities. The SPCC plan will be
available at the onsite at all times.
Please refer to Attachment P, Waste Handling Plan, for more details.
i. Explain Where storage and/or stockpile of Wastes Will occur on this site.
The sand wash processing plant will not generate any waste materials; all non -saleable material
(based on size) will be inert and used to backfill and reclaim the Facility concurrent with active raining
operations. General Wastes, including trash from the operation of the office, maintenance
shop/Warehouse, processing facility lab, check in/check out booth, and from the employees of the
mine (lunch containers, beverage containers, etc.), will be stored in a standard dumpster located
between the office and maintenance shop/Warehouse buildings. The volume will be stored in a one
cubic yard dumpster and collected bi-weekly by the waste handler.
A minor quantity of household hazardous waste will be generated by operations at the Facility. These
materials include but are not limited to: antifreeze, auto batteries, brake fluid, aerosols and cleaning
fluids, diesel fuel, lubricants and solvents, used motor oil, used oil filters, and transmission fluids. The
majority of these household hazardous Wastes Will be generated at the maintenance shop/warehouse
during fleet and equipment maintenance activities. Some Waste will also be generated at the office
and processing facility lab in the form of cleaners, disinfectants, etc. during general cleaning activities.
All household hazardous waste will be collected and stored separately from general waste until it can
be properly disposed of in accordance with the Weld County Household Hazardous Waste Program.
Please refer to Attachment P, Waste Handling Plan, for more details.
100 Page Weld County:
Use by Special Review for Mining operations
BLACK U rT I
ATTACHMENT Dal:
QUESTIONNAIRE RESPONSES
Explain the proposed landscaping/screening for the site. The landscaping shall be separately
submitted as a landscape plan map as part of the application submittal.
No landscaping or screening is planned for this site. A buffer area of at least Zoo feet has been left
between the affected lands boundary and the permit boundary, as shown in Figure CI Vicinity Map. A
protective buffer will also surround the sand wash processing plant facilities, and the WCR 91 right-of-
way, which will not be disturbed by the ruining operations.
Any areas of the Facility disturbed during construction activities and not needed for operations will be
covered with topsoil and seeded with a weld County approved seed mix, as discussed in
Questionnaire Response 1.h.
There is currently no plan to plant trees or shrubs at the site. Non -noxious weeds and other naturally
growing vegetation native to rangeland will be allowed to grow but will not be purposely planted by
Black Mountain or its operator. Black IVIountain intends to revegetate in general conformance to the
surrounding lands.
A sign will be erected at the entrance to the facility from CR 91. Tease refer to Attachment D-3 (Sign
Plan) for further information, as required.
Explain how long it will take to construct this site and when construction and landscaping is scheduled
to begin. Timetable 23-2-260.0.22.
The construction stage of the mine plan will include the installation of all sand wash processing plant
facilities, facility road installation and existing road upgrades, and installation of all utilities necessary,
for plant operations. This stage will also include the construction of the temporary sediment basin to
be used for construction stormwater management. The construction stage is estimated to take
approximately 8-12 months to complete. Construction will begin as soon as all applicable permits and
approvals are received, currently estimated for spring 2020.
Once construction activities are complete and all impervious surface areas are installed, temporary
BMPs will be removed. No landscaping is currently planned. All areas disturbed by construction
activities that aren't needed for operations will be covered with topsoil and reseeded with an
approved Weld County seed mix, as discussed in Questionnaire Response 1.h
I. Explain any proposed reclamation procedures when termination of the Use by special Review activity
occurs.
The reclamation stage will occur concurrently with mining. Early portions of the reclamation stage are
estimated to being late in year one and/or early in year two and will be completed concurrently with
operations to reclaim previous year's mining operations at the Facility. The majority of concurrent
reclamation will begin in approximately years 2-3 of operations and will progress in phases concurrent
with active raining operations.
11I Page Weld County:
Use by Special Review for Mining operations
BLACK U IN TA IN
ATTACHMENT Dal:
QuESTIONNAIRE RESPONSES
Backfill material from the sand wash processing plant will be deposited behind the active excavation
area and used to regrade and contour each ruining area for reclamation. Stockpiled backfill material
from years one andior early two will be backfilled into the pit concurrently with active mining. Once
each block has been graded and contoured to blend into the existing surrounding landscape, topsoil
will be placed on the material and the area will be seeded with a Weld County approved seed mix.
Mining Reclamation Timetable
MINING
PHASE
DEGRADE
PHASE
DEGRADE
(YRS.)
DECLAIM (YRS.) *
APPROX.
AREA (ACRES)
Yrs* 140
1
2-10
11-13
281.3
Yrs. 11-20
11-20
21-23
400.2
`ors. 21-30
3
21-30
31-33
416.0
Yrs. 31-35
4
31-3S
35-33
566.7
Final
Reclamation
5
35-36
36-33
131.3
*Reclaim including topsoiling, seeding, and revegetation.
At the end of aline life, the processing facility will be demolished. Equipment swill be cleaned as
needed with water and reused and recycled as much as possible. This will include the sand wash
processing plant and equipment, conveyors, silos, water storage tanks, and load''out facilities.
Warehoused materials and fuel will be removed as part of the demolition of the Facility. Fuel will be
removed from the storage tanks at the warehouse and fueling station, and the tanks will be cleaned
thoroughly before being dismantled.
Materials that cannot be recycled will be disposed in the process water pond and slurry pond. The
liners will be cut to prevent water ponding within the disposal area. The materials to be disposed will
include pavement, some concrete foundation materials, siding, supports, unused raw plant feed or
product and other materials that cannot be recycled. The ponds will be filled and compacted and
regraded to conform to surrounding contours. Stormvwater will be directed around the construction
material disposal. No outside material will be accepted for disposal. All mat slab foundations and
footings will be removed (approximately x',000 cubic yards of material) and all deep foundations will
be buried in place.
The office and warehouse buildings will remain in place for use in subsequent rangeland operations at
the site. Pavement to those buildings will remain in place.
Please see Attachment K (Exhibit E, Reclamation Plan) for more details,
12I Page Weld County:
Use by Special Review for Mining Operations
BLACK MOU TAI
ATTACHMENT Dal:
QuESTIONNAIRE RESPONSES
m. Explain how the storm water drainage will be handled on the site.
Stormwater runoff from the construction area will be managed by a temporary sediment basin that
will capture and temporarily store runoff until it infiltrates and evaporates or may be pumped out and
discharged to nearby undisturbed buffer areas.
A Construction stormwater General Permit will be obtained from the Colorado Department of Public
Health and Environment's (CDPHE) Water Quality Control Division and a Stormwater Management
Plan (SWMP) will be developed for this temporary basin. The basin and construction area will be
inspected at least once every two weeks and after each 24 -hour storm event of o.15" or greater. The
temporary sediment basin will either be reclaimed at the end of the construction stage or may be
converted into a permanent non -discharging stormwater retention pond, if required.
The sand wash processing plant facilities have been designed to keep stormwater runoff from
encountering the process water used within the facility's closed loop water system. Stockpiled
materials and facility operating surfaces will be graded to direct stormwater runoff away from the site
and onto nearby buffer areas. Berms will be constructed around the fueling station, above ground fuel
storage tank secondary containment, and ready line to direct runoff away from the area. Any
stormwater runoff that falls directly in the fueling station and ready line area will be directed to a
small operational settling pond that will be discharged to nearby buffer areas as needed.
Berms at the top of the active raining areas will be used to direct stormwater runoff away from the
active pit. Small operational settling ponds will be used to temporarily hold any stormwater runoff
that gathers in the pit area. Stormwater will be removed through pit sumps, if necessary, using a
pump system. Settling ponds will be placed near the active mining operations as necessary throughout
the life of the mine and will be reclaimed as part of the ongoing concurrent reclamation process as
they are no longer needed. These settling ponds will be located far enough from the pit to ensure pit
stability. Water from these settling ponds will be alloyed to infiltrate or will be discharged to nearby
natural buffer areas, as needed.
AGeneral Permit for Stormwater Discharges Associated with Sand andGravel Dining and Processing
will be obtained prior to any discharges of the settling ponds.
In the active mining area, all necessary BMPs shall be employed to ensure that there is no
unauthorized release of any pollutants to the surface drainage systems. BIV1Ps will be outlined in the
Ste rmwater Pollution Prevention Plan (SWPPP)r Spill Prevention Control and Countermeasures (SPCC)
Plan, and employed through good housekeeping practices.
Please refer to Attachment N, Drainage Report, for more details.
1.3I Page Weld County:
Use by Special Review for Mining operations
ATTACHMENT Dal:
QuESTIONNAIRE RESPONSES
Method and time schedule of removal or disposal of debris, junk and other wastes associated with the
proposed use.
General wastes and household hazardous waste will be properly disposed of as outlined in
Attachment P", Waste Handling Flan. General wastes generated by the Facility will be stored in a
standard dumpster located between the office and maintenance shop/warehouse buildings. The
volume will be stored in a one cubic yard d um Aster and collected hi -weekly by the waste handler. A
minor quantity of household hazardous waste generated by operations will be collected and stored
separately from general waste until it can be properly disposed of in accordance with the Weld County
Household Hazardous Waste Program.
The dismantling and demolishment of the Facility is discussed in Questionnaire Response 8.I, above
and in Attachment K (Exhibit E, Reclamation Plan). At the end of mine life, the processing facility will
be demolished. Equipment will be cleaned as needed with water and reused and recycled as much as
possible. Materials that cannot be recycled will be disposed in the process water pond and slurry
pond. The liners will be cut to prevent water ponding within the disposal area. No outside material
will be accepted for disposal. All gnat slab foundations and footings will be removed and all deep
foundations will be buried in place.
The office and warehouse buildings, and pavement to those buildings, will remain in placed to
augment the final rangeland land use at the site. The remaining affected areas will be returned to
rangeland through the use of appropriate grading and seeding to match existing surrounding areas as
closely as possible. All remaining material stockpiles, including topsoil, plant feed material, and backfill
material, will be used during the final reclamation of the site.
No other debris, junk, or other wastes are anticipated from the proposed use.
o. A statement delineating the need for the proposed use.
Industrial proppant sand plays an important role in the hydraulic fracturing process, maximizing the
efficiency of the well, which reduces the freed to re -disturb the area to continually work on the
wel lbore. Currently, industrial proppant sand is largely transported into Weld county and adjacent
areas by mines outside of Colorado, mainly from Wisconsin. The location of the Facility is ideal for
providing the needed proppant sand to the local Colorado market, reducing the overall environmental
cost of long transportation routes and reducing traffic on Colorado roads.
9. A statement which explains the Use by Special Review area is not located in a flood plain, geologic hazard
and 'Meld County Airport overlay district area; or that the application complies with Chapter 23, Article V,
Overlay District Regulations as outlined in the weld County Code.
The USR area is not located within a floodplain, geologic hazard, nor Veld County Airport overlay district
area.
14I Page Weld County:
Use by Special Review for Mining operations
BLACK U NI
'NA ,3
ATTACHMENT Dal:
QUESTIONNAIRE RESPONSES
The following documents or any other similar documents shall be submitted by the applicant if deemed
necessary by the Board of County Commissioners or its duly authorized representative for the protection of
the health, safety and welfare of the inhabitants of weld County.
a. Applicant shall submit a copy of the reclamation plans submitted to the State of Colorado Mined Land
Reclamation Board. The reclamation plans must include a map showing property boundaries, topography,
bodies of water, and access.
Please see Attachment K (Exhibit E, Reclamation Plan) and Attachment D-1, Confidential Documentation,
for more details,
b. Plans for obtaining water supplies for the mining operation.
The processing plant within the operation facilities will utilize water from existing water wells on adjacent
property owned by Black Mountain Land Company, LP. Water storage tanks and a water line will be
constructed from the wells to the Facility, as shown in Attachment K (Exhibit D, Figure D4). Water pumped
from the wells will be stored in fresh water tanks at the Facility. The sand wash processing plant has been
designed to recycle the majority of its water to minimize total water usage/loss through the use of filter
presses, a specialized decanting system in the wet sand storage building, and through a closed loop water
system. A small amount of water loss will occur as the over/undersize and claytfe'ldspar materials are
removed from the plant and as evaporation during final drying operations. Overall, the facilities will
capture and reuse 95% of the water in its system.
Since the water is already being withdrawn from the aquifer for agricultural use, and since Black Mountain
is in the process to transferring that use from agricultural to multiple use, there will be no new
groundwater impacts from water withdrawals as a result of the operation. Proof of multiple use will be
provided as soon as it is finalized.
Potable water for the onsite drinking water and sanitary system will be purchased from Morgan County
Quality water District. Mack Fountain is in the process of negotiating this agreement and will provide
once it is finalized
Please refer to Attachment F, Water Supply Narrative, for additional information regarding water
resources for the project.
15IPage '~field County:
Use by Special Review for Mining operations
ATTACHMENT Dal:
. BLACK U TAI.
IS
fir'QUESTIONNAIRE RESPONSES
Additional Information as required by weld County Code 23-4-260.6.14.
A. Water Consumption
i. An analysis of the amount of water which will be required to be replaced for each phase of the raining
operation and at build out.
The onsite facilities will use an estimated 600-800 gpm of fresh water. The plant .has been designed to
recycle the majority of its water to minimize total water usage/loss through the use of filter presses, a
specialized decanting system in the wet sand storage building, and through a closed loop water system.
Overall, the facilities will capture and reuse 95% of the water in its system. The water will be provided
by existing water wells on adjacent property owned by Black Mountain Land Company, LP. Water
storage tanks and a water line will be constructed from the wells to the Facility. The location of the
wells, well permit numbers, and proposed pipeline route to transport the water to the Facility is shown
in Attachment K (Exhibit D, Figure D4). Since the water is already being withdrawn from the aquifer for
agricultural use, there will be no new groundwater impacts from water withdrawals as a result of the
operation. Black Mountain is in the process of transferring the water rights in these wells to multiple
use. Proof of multiple use will be provided as soon as it is finalized.
ii. The analysis should address the amount of water consumed in the raining and processing of the
material including dust suppression.
The majority of water use will come from the operation of the sand wash processing plant. As
discussed in Questionnaire Response, Additional Information #A.i above, the operation will use an
estimated 500-800 gpm of fresh water.
The Facility will use additional water for dust suppression on haul roads, at the plant, and during
reclamation activities. Water for these activities will come from existing water wells on adjacent
property owned by Black Mountain Land Company LP. It is estimated that dust suppression activities
will require approximately 58 gpm of water every day.
The equipment wash bay, located at the maintenance/warehouse facility will have a 5,000 -gallon
fresh water tank that will be used to gash the equipment for maintenance activities. This wash bay
will have a low flow pump and washing the equipment will tape approximately 3,000 gallons of water
2-3 times per weep. water for the wash bay tank will also be supplied by the existing water wells.
No additional water use is anticipated as part of the reclamation activities at the site other than for
dust suppression activities stated above. As part of the planned concurrent reclamation process,
affected areas will be backfilled with backfll materials, regraded and contoured to match the
surrounding natural landscape. Topsoil will be placed over the backfill then seeded. Once seeding has
occurred, the reclamation area will not be irrigated.
16I Page Weld County:
Use by Special Review for Mining operations
BLACK U IN T A
ATTACHMENT Dal:
QUESTIONNAIRE RESPONSES
iii. The analysis should address the issue of water consumed for domestic purposes by on -site staff.
Potable water will be purchased from Morgan County QualityWater District. This water will be used in
the office building for drinking water and for the sanitary systems. It is anticipated that approximately
less than 3.6 gpm of water will be required for drinking water and sanitary systems at the Facility,
iv. The analysis should address the issue of evaporative losses consumed from exposed groundwater
including a discussion of the feasibility of lining.
Two lined ponds will support the processing facilities. One will contain process water from the sand
wash processing plant and will be used to feed the process water tank, as part of the closed -loop water
conservation system. The second pond will be used for temporary storage of slurry from the plant, as
n ecessary. The ponds will be located adjacent to each other, lined with HDPE liners, and will be
constructed at grade. Both ponds will be approximately o.5 acres in area, with a depth of no more than
10 feet. They will be capable of handling approximately 1.6 million gallons each. Safety berms will
surround each pond.
Be Water Replacement Source
i. A description of the surface and well water rights and their anticipated yields when converted to be
u sed as replacement for the mater consumed in the ruining operation.
There are no known surface grater rights within the project boundary. Black Mountain has access to
well water rights from existing water wells on adjacent property owned by Black fvlountain Land
Company LP. These water rights provide more than 4,000 acre-feet of water per year. Currently, this
water is being used for irrigation and by grazing livestock within the Facility area and on nearby land
owned by Black Mountain Land Company LP. Once the Lost Creel< Mine project begins, animal grazing
within the property boundary will discontinue and the water from some of these water rights will be
u sed to provide fresh water for the sand wash processing plant and dust suppression activities at the
Facility. As part of the planned concurrent reclamation, affected lands will be returned to rangeland. At
the end of the life of the mine, it is planned that livestock grazing on the property will return.
IL Projections as to the ruining of replacements to the river system from these sources.
Since the water needed for the sand wash processing plant, associated facilities, and dust suppression
activities is already being withdrawn from the aquifer for agricultural use, there will be no new
groundwater impacts from water withdrawals as a result of the operation.
1.7I Page Weld County:
Use by Special Review for Mining Operations
BLACK M.OU T �
i y+
ATTACHMENT Dal:
QUESTIONNAIRE RESPONSES
iii. A description of methods proposed to monitor, prevent and mitigate against direct injury to users of
wells in the vicinity of the gravel operation as a result of alterations in the groundwater regime
occasioned by the mining operation or to said impacts.
Since the mater needed for the sand wash processing plant, associated facilities, and dust suppression
activities is already being withdrawn from the aquifer for agricultural use, there will be no new
groundwater impacts from water withdrawals as a result of the operation.
Although the operation is not anticipated to adversely affect the area groundwater, Black Mountain
has nevertheless developed a practice -based groundwater monitoring program for the project. Black
Mountain proposes to install three monitoring wells within the Zoo -foot buffer area between the
affected lands and the permit boundary on each, of the eastern and western sides of the project area
concurrently with initial construction activities, for a total of 6 wells. Another monitoring well is
proposed for installation within the plant facilities once construction has been completed. An
additional three monitoring wells may be installed in later years within Black Mountain Land
Company, LP's lands overlying the Hay Gulch Aquifer, if necessary. There are also two existing water
wells onsite, currently permitted for use as irrigation and ranch water wells. If necessary, water levels
and water samples can be pulled from these wells to supplement onsite data,
wells will be monitored for water levels and water quality initially upon completion and quarterly
throughout plant construction, which is estimated to tape approximately g - 12 months, to provide
baseline data prior to beginning operations.
After operations begin, water level data would be collected from all of the monitoring wells and would
continue on a quarterly basis using either a manual water level meter or dedicated water level meter
with datalogger. Water duality data would continue to be collected and sampled on a quarterly basis
for analysis as well.
Please see Attachment K (Exhibit E, Section 3.1.7 Groundwater) for additional groundwater
monitoring program details.
181 Page Weld C:ou nty:
Use by Special Review for Mining operations
BLACK U IN T A
ATTACHMENT Dal:
QUESTIONNAIRE RESPONSES
Supporting Documentation as required by weld County Code 23-4-280.
A. The applicant shall submit copy of those Reclamation Plans submitted to the State of Colorado Fined
Land Reclamation Board. The Reclamation Plans must include a map showing property boundaries,
topography, bodies of water, and access.
Please see Attachment K (Exhibit E, Reclamation Plan) and Attachment D -1.h, Confidential Documentation,
for more details.
B. Plans for obtaining water supplies to replace water consumed by MINING and processing of the material,
including dust control, consumed for domestic purposed by employees, and consumed by evaporative
losses from exposed groundwater.
Water needed for the sand wash processing plant will be provided by existing waterwells on adjacent
property owned by Black Mountain Land. Company LP. Water storage tanks and a water line will be
constructed from the wells to the Facility as shown in Attachment F, Figure 3. Water pumped from the
wells will he stored in fresh water tanks at the Facility. The sand wash processing plan has been designed
to recycle the majority of its water to minimize total grater usage/loss through the use of filter presses, a
specialized decanting system in the wet sand storage building, and through a closed loop water system. A
small amount of water loss will occur as the over/undersize and clay/feldspar materials are removed from
the plant and as evaporation during final drying operations. Overall, the sand wash processing plant will
capture and reuse 95% of the water in its system.
Potable grater for the onsite drinking grater and sanitary system will be purchased from Morgan County
Quality Water District. Black Mountain is in the process of negotiating this agreement and will provide
once it is finalized.
Please see Attachment K (Exhibit G,'Water Information) and Attachment F, Water Supply Narrative, for
more details,
C. Crass sections of drainage structures (culverts for access to county roads, interior haul roads crossing of
pa +ding or stream channeling).
Black Fountain is in the process of completing designs for the access road and any associated drainage
structures necessary, as part of their overall road design program.
It is not anticipated that the haul roads will be built to cross any ponds or stream channeling,
D. Profile and typical crass section of haul roads.
Please see typical cross section of haul roads in Attachment K (Exhibit D, Kline Plan, Figure D5) for more
details.
19I Page Weld County:
Use by Special Review for Mining Operations
BLACK . U IN TA I
ATTACHMENT Dal:
QuESTIONNAIRE RESPONSES
Operations Policy Narrative as required by Weld County Cede 23-4-290.
A. No excavation or processing of sand and gravel ,shall be permitted nearer than ten (10) feet to the
boundary of ADJACENT property, easement or irrigation ditch or right-of-way, nor nearer than one
hundred twenty-five (125) feet to any existing residence, unless by written agreement the owners of such
ADJACENT property consent to a lesser distance and the Planning Commission approves such lesser
distance. The Planning Commission may set a greater distance than mentioned above when, in its opinion,
it is justified.
The boundary of all affected areas has been offset by at least Zoo feet from the property boundary,
Morgan County Quality Dater District's facilities, and the right-of-way for WCB 91. Additionally, it has
been offset at least 300 feet from the I-76/Hwy E right-of-way.
B. All sand and gravel operations shall be conducted during the hours of daylight except in the case of public
or private emergency, or to make necessary repairs to equipment. This restriction shall not apply to
operation of administrative and executive OFFICES or repair facilities located on the property.
All sand processing equipment will be located within fully enclosed buildings. There are no crushing
facilities at the Facility and no blasting or use of explosives is proposed. Per multiple phone and email
discussions with weld County personnel, this policy is not applicable to the Lost Creek Mine because all
processing equipment is located inside buildings.
C. Weeds and any other unsightly or NOXIOUS WEEDS shall be cut or trimmed as may be necessary to
preserve a reasonably neat appearance and to prevent seeding on adjoining property.
Appropriate weed control methods will be employed as necessary to control the spread of noxious weeds
throughout the life of the operation. Black Mountain has drafted a Landowner Management Policy in
coordination with the weld County 'deed Management Department outlining its proposed preventative
measures, monitoring schedule, and geed control methods for the Facility, which is included in
Attachment D -1c, Landowner Management Plan (weed Management Plan) of this application.
Operational areas of the sand wash ,processing plant and active areas of the mining operation will be kept
free of all vegetation using herbicides. Non -operational areas of the sand gash processing plant disturbed
during construction will be seeded with a weld County approved seed mix and monitored for noxious
weeds through stabilization. Operations will be phased to disturb as little area at a time as possible by
using concurrent reclamation practices. Backfilled pit areas will be regraded, contoured, and reseeded
with a Weld County approved seed mix as soon as practicable to help prevent the growth of noxious.
weeds. If mulch is used, it will be certified weed and seed free per Weld County Reclamation guidance
practices. Reclamation areas will be monitored throughout final stabilization and noxious weeds will be
removed through the use of herbicides. Incoming truck traffic or visitor vehicles that may carry weed
seeds mill be limited to paved areas. Only operational trucks (haul trucks, water trucks, etc.) will be used
on disturbed or compacted sediment areas.
200 Page Weld County:
Use by Special Review for Mining operations
BLACK MOUNTAIN
ATTACHMENT Dal:
QuESTIONNAIRE RESPONSES
D. Existing trees and ground cover along PUBLIC road frontage and drainage ways shall be preserved,
maintained and supplemented if necessary, for the depth of the SETBACK in order to protect against and
reduce noise, dust and erosion.
The boundary of all affected areas has been offset by at least a 200 natural buffer area from the property
boundary. Within this offset, existing trees and ground cover will not be disturbed except where the
access read for the mine entrance of WCR 91 will be located. As little area as is practicable will be
disturbed for this construction activity and all disturbed areas not paved for the access road will be
reclaimed and reseeded using a Weld County approved seed mix as soon as possible after road paving.
E. Insofar as practicable, all means of access to the property from any STREET shall be located and
designated as to avoid the routing of vehicles to and from the property over STREETS that primarily serge
residential DEVELOPMENT.
The mine entrance will be located directly off WCR 91, which does not primarily serve residential
developments. Semi -trucks used to transport industrial sand product from the sand wash processing plant
will access the Facility from Hwy 34/WCR 42 south down WCR 91 to the Lost Creek Mine access road.
F. All access roads from sand and gravel operations to PUBLIC highways/ roads or STREETS/ or to adjoining
residential STRUCTURES, shall be paned or otherwise treated to minimize dust conditions on all parts of
such access roads which are located within one-fourth (%) mile of the PUBLIC highway, road/ STREET or
adjoining residential STRUCTURE.
The mine access road to the Facility will be paved from WCR 91 to the truck loadout facilities. Additionally,
the parking lot and access road for the office and shop/warehouse buildings will also be paved. Paving at
the Facility will include approximately 2,800 linear feet (3.0 acres) of roads and 1.3 acres of impervious
surface for parking areas. There are no residential structures within one-fourth (1/4) mile of the mine
access road on WCR 91.
G. Prior to starting excavation in certain specific instances, as first determined by individual investigation by
the Board of County Commissioners, where excavations are considered hazardous or otherwise harmful to
nearby residents or to their property, the Board of County Commissioners may require the excavations to
be fenced or that some other action betaken on the part of an operator in order to minimize the
hazardous situation. Chain link fencing to keep out young children, three -strand barb wire to keep out
LIVESTOCK, acceleration/deceleration lanes to facilitate the safeismooth flow of traffic, and water
augmentation to compensate for water flosses caused by evaporation are examples of actions which may
be required by the Board.
The boundary of all affected areas has been offset at least 200 feet from the property boundary and may
be fenced, as needed. While not a part of this application, Black. Mountain has entered into discussions
with weld County to upgrade and pave WCR 91 from Hwy 34 to 300 feet past the mine entrance, as well
as add a recovery approach at the intersection of Hwy 34 and WCR 91, and add turn lanes on .both Hwy 34
and WCR 91 for increased vehicular safety. Additionally, Black Mountain has agreed to add a turn lane
21I Page Weld Cou n
Use by Special Review for Mining Operations
BLACK U IN TA
ATTACHMENT Dal:
QuESTIONNAIRE RESPONSES
going east off the intersection of WCR91 and US Hwy 34/ SCR 42 at the request of local stakeholders. The
road improvement agreement is being processed by Weld County separate from the USR.
H. 'where topsoil is removed, sufficient arable soil shall be set aside, for re -spreading over the excavated
area.
All topsoil will be segregated and stored on affected area perimeters or other such areas that will
minimize the disturbance of topsoil stockpiles. Topsoil at the Facility is currently estimated to be less than
2' deep with many areas having little to no topsoil. Where possible, up to 12" of topsoil will be stockpiled.
Topsoil stockpiles will be vegetated for preservation and erosion control. Replacement of topsoil will occur
as necessary for reclamation activities and will be done by distributing the topsoil as evenly as possible. All
affected areas will be seeded with a weld County approved seed mix.
I. Rock crushers and similar accessory facilities and equipment, but not including batching (concrete and
asphalt) facilities may be allowed. However, the Planning Commission or Board of county commissioners
may set out additional conditions under which these operations may be permitted; and said conditions
may vary by location due to abutting land USES. Concrete and asphalt batch plants shall meet the
requirements of Section 23-3-40.
No crushing activities are planned or proposed to take pl
hatching will be done at the Facility.
ace at the operation. No concrete or asphalt
J. Insurance. The operator shall furnish evidence that he or she is insured to the extent of not less than one
hundred thousand dollars ($100,000.00) against liability for any negligent act or omission by the operator
from the operation or maintenance of the sand and gravel pit and the extraction and production of sand
and ,gravel and all activities connected with or incidental thereto.
Black Mountain will furnish proof of insurance to the extent required for final approval of the US R.
K. The USE will not cause injury to vested or conditional water rights. If the USE may result in injury to vested
or conditional water rights, the applicant shall present a copy of a well permit to the Department of
Planning Services prior to recording the Plat or at a time designated by the Board of county
commissioners, either supported by a plan of exchange or substitute supply approved by the State
Engineer or a decreed plan for augmentation approved by the District court for water Division No.1
which prevents injury to vested and conditional water rights.
The operation will not cause injury to vested or conditional water rights. The sand gash processing plant
within the operation facilities will utilize water from the existing water wells from the adjacent property
owned by Black Mountain Land company LP during its operation and recovery methods will be used to
recycle and reuse as much water as possible. Water pumped from the wells will be stored in fresh water
tanks at the facility. The sand wash processing plant has been designed to maximize water recycling to
minimize the amount of water used overall. Since the water is already being withdrawn from the aquifer
for agricultural use, and since Black Fountain is in the process of transferring these water rights to
22I Page Weld County:
Use by Special Review for Mining operations
BLACK U T .I '
."
` 4,":11
ATTACHMENT Dal:
QUESTIONNAIRE RESPONSES
multiple use, there will be no new groundwater impacts from water withdrawals as a result of the
operation.
23I Page Weld County:
Use by Special Review for Mining operations
BLACK U IN T. i
ATTACHMENT Dal:
QUESTIONNAIRE RESPONSES
Reclamation Policy Narrative as required by Meld County Code 23.4.300.
A. Reclamation plans shall be reviewed to determine the compatibility of the proposed USE with
surrounding land USES.
The entire affected land area will be returned to rangeland after reclamation in order to return the
property to pre -.mining conditions as closely as possible. Properties adjacent to the affected lands
are uinirrigated rangeland, with some agricultural fields in the vicinity. The proposed post -raining
land use of rangeland will return the affected land to its current land use. Reclaimed land will be in
general conformity to the surrounding land. Please see Attachment K (Exhibit E) for more details.
B. Following the completion of operations, the land shall be left in a safe condition.
Following mining operations, pits will be filled with backfill materials and regraded and contoured to
match existing surrounding areas as closely as possible. Reclamation will occur concurrently with
mining operations.
At the end of mine life, the processing facility will be demolished. Equipment will be cleaned as
needed with water and reused and recycled as much as possible. This will include the process
building and equipment, conveyors, silos, water storage tanks, and loadout facilities. Warehoused
materials and fuel will be removed as part of the demolition of the Facility. Fuel will be removed
from the storage tanks at the warehouse and fueling station, and the tanks will be cleaned
thoroughly beforebeing dismantled.
'Materials that cannot be recycled will be disposed in the process water pond and slurry pond. The
liners will be cut to prevent water ponding within the disposal area. The materials to be disposed
will include pavement, some concrete foundation materials, siding, supports, unused process feed
or product and other materials that cannot be recycled. The ponds will be filled and compacted and
regraded to conform to surrounding contours. Stormwater will be directed around the construction
material disposal. No outside material will be accepted for disposal. All gnat slab foundations and
footings will be removed and all deep foundations will be buried in place.
The office building and warehouse building will remain in place for use in subsequent rangeland
operations at the site. Pavement to those buildings will remain in place.
All necessary BM Ps shall be employed throughout the construction, operation, and reclamation
stages to ensure no unauthorized release of any pollutants to the surface drainage system occurs.
BMPs will be outlined in the associated SWPPP, SPCC, and via good housekeeping practices.
All necessary B Ps shall be employed to ensure that no unauthorized release of any materials
mined, handled, or disposed of within the permit area pollutes groundwater. Please see Attachment
K (Exhibit E) for more details,
24 I P a g e Weld County:
Use by Special Review for Mining operations
411111':, BLACK MOUNTAIN
ATTACHMENT Dal:
QUESTIONNAIRE RESPONSES
C. Sufficient drainage shall be provided so as to prevent grater pockets or undue erosion. Grading shall
be accomplished in such a manner that store water leaves the property at the original, natural
drainage points. Runoff at any one (1) such point shall not normally be increased over historic flows.
Increases over historic flows shall be allowed only when it is shown that the increased flows will not
adversely impact USES or lands affected by such flows.
All affected lands shall be stabilized to effectively control erosion. To achieve this, reclamation will
be completed as quickly as possible after pit backfilling. Areas will be regraded and contoured to
conform with surrounding lands, using slopes no steeper than 5:1(H:V). Topsoil will be placed and
the area will be seeded with a Meld County approved seed mix. [wring reclamation and plant
demolition, appropriate BMPs will be used to stabilize affected lands and minimize erosion until
lands reach final stabilization. Stormwater runoff will be directed to natural drainages. Please see
Attachment K (Exhibit E) for more details.
D. All excavated areas shall finally be graded in substantial conformity to the USE of the land proposed
in the reclamation plan. Ridges, banks and mounds shall be graded so as to minimize erosion. Trees,
shrubs, legumes, grasses or other ground cover shall be replaced in order to avoid erosion insofar as
is practicable.
Reclamation of the pits will be completed concurrently with raining operations. Reclamation,
including regrading, contouring, seeding, and planting, as appropriate, will occur as soon as possible
on areas no longer necessary for active mining operations. Grading on all affected lands will be
completed to match as closely as possible the surrounding undisturbed areas with slopes no steeper
than S:1 (H:v) Seeding with a weld County approved seed mix will follow normal surface
stabilization procedures on all affected areas where planting is not required. Please see Attachment
(Exhibit E) for more details.
2.5I Page Weld County:
Use by Special Review for Mining Operations
Black Mountain Sand Weld LLC
500 Main St. Ste. 1200, Fort Worth, TX 76102
(817) 698-9901
February 21, 2020
Mr. Douglas Barnett
Landowner
46106 US Highway 34
Orchard, CO 80649
Acknowledgment of Project and Future ROW Agreement for USR Permit 19-0057
Mr. Barnett,
This letter is providing proof to the Weld County Planning Department that we have discussed
our plans with you for acquiring necessary ROW for the bridge and CR 91 upgrades necessary
for our project, area shown in Exhibit A. Details for our agreement will be defined in a future
ROW agreement between yourself and Black Mountain with input from Mr. Kent Kingsbury,
your cattle Lessee.
By signing the below, you are acknowledging as the private landowner that an agreement will
be put in place shortly after approval is granted for the USR 19-0057 permit by the VVe1d County
Commissioners. Such agreement will allow us to secure private ROW from you for the CR 91
and bridge upgrades necessary for our project.
Thank you,
(.: - z
i-
Black Mountain Sand Weld LLC
Brittany Schamaun
r,
�Vail/ft
thiAtVW--
Dougys Barnett
Landowner
2/z t I -LL
Drainage Report Checklist
Project dame: Lost Creek Mine - USR19-0057
The purpose of this checklist is to assist the applicant's Engineer with developing a drainage report that, -
supports the intent of the Weld County Code using commonly accepted engineering practices and methodologies.
Is the project in the MS4?
'des
No If yes, the following requirements in glue apply. See Chapter 8, Article IX of the weld County {Cede.
Report Content
Weld County Case Number (USRI 9-0057)
Certificate of Compliance signed and stamped by a
Colorado Licensed PE — Bee #1 below.
[description/Scope of work
Location (County Roads, -T-R) — Include -T-'R
Nearby water features and ownership
Total acres vs. developed acres
Hydrological soil types/maps — Include Maps in Report
FEND Flood Zones — NUA
Urbanizing or non -urbanizing
Methodologies used for report & analysis
(full spectrum is not accepted) — See #3 below
Base Design Standard used for permanent control
measure design in the M4
Discussion of offsite drainage routing
Conclusion .statement indicating that the {design will
adequately protect public health, safety, and general
welfare and have no adverse impacts on public
rights -of -way or offsite properties
Hydrology and Hydraulic Analysis
Design Storm / Rainfall Information
(NOAA Atlas or Local Data) — See #4 below
Release Rats calculations
Post construction .site imperviousness — See #5 below
Hydrologic calculations (historic & developed basins)
Hydraulic calculations for proposed drainage
improvements (swales, culverts, riprap, pond, outlet:
spillway, I► QCV outlet, etc.) — See #7 below
Detention/WQCV calculations
Comments: See next page
Construction Drawings
Stamped by PE
Engineering scale & north arrow
Properly lines, rights -of -way, and easements
1' Contours & elevations (existing & proposed)
Pre- and post -development drainage basins
Arrows depicting flow direction
Time of concentration critical path
Drainage {design paints
Improvements labeled
Permanent control measure and associated {drainage
features labeled 'No Build/No Storage', include
design volume
Cross sections for open channels, profiles for pipes
Elevations for inverts, flog lines, trap of grates,
orifice(s), etc.
Pipe specs (size, material, length, slope)
Outlet and spillway details
p
Maintenance Plan — revise to include detention
pon d ts)
Frequency of onsite inspections
Repairs, if needed
Meaning of sediment and debris
Vegetation maintenance
Manufacturer maintenance specifications, if
applicable
Other Required Documents (If Applicable)
Q Variance Request and documentation— explain
hardship, applicable code section, and proposed
mitigation. Variances will not be granted for the Base
Design Standard requirement in the MB4.
Department of Public VIorks I Development Review
1111 H Street, Greeley, CO 89631 Ph: 970-394-6496 www.weldgov.comldepartmentslpublio_works/development_ review
2/1 8/2020
Drainage Report Checklist
Given that the drainage report submitted was conceptual in nature, for future submittals of the final drainage report, please
include the fallowing:
1 Include the Feld County Certification of Compliance located at:
https://www.weldgov.comiLiserFiles/Servers/Server 6/File/Departments/Public%20WorksiDevelopmentReviewiCert
ificate%20of%20Compliance%2008g22g19.pdf
2. This project will require on -site detention pond(s). The County requires detention as the default for ponds. Retention
ponds are allowed only when the site topography dues net allow for outfall location. A variance will need to be
requested to the County Engineer for a retention pond design. Retention facilities must be designed to contain 1.5
times the volume of the runoff generated by the 24 -hour, 100 -year storm, plus 1 foot of freeboard. See Weld County
Code Section 8-11-100 for more information about detention and retention ponds.
a) PerWeld County Code Section 8-4-40, Weld County requires on -site detention of stormwater runoff from the
1 -hour, 100 -year storm falling on the developed site for all future developments. For non -urbanizing drainage
areas the detained water .shall be released at the at the historic rate of a 1 -hour: 10 -year storm falling on the
undeveloped site. Colorado Revised Statute 7-92-6g (8.C) states that for storm events larger than a 5 -year
storm ponds must continuously release or infiltrate at least 99% of the runoff within 120 -hours. Although the
release rate is small, the infiltration rate can also be included in the 120 -hour drain time calculation.
b) When sizing the pond using the Modified FAA method (or similar method), water quality should be provided.
The WQCV can be included within the detention volume.
c0 One foot of freeboard is required for the pondts).
d) Please provide stage storage table(s) for the proposed pond{s} based on graded contour data, showing the
'QCelevation and 100 -year TEL.
o) An outlet structure with an orifice for eater quality and a separate plate/orifice for detention release will be
required. An emergency overflow weir will be required for the pond. See #9 below.
f) Provide details of the final drainage structures.
g) Provide a section in the report on how maintenance of the pond will be addressed in the future. Add pertinent
notes to the drainage exhibit for future reference.
3. State the method used to calculate the developed 100 -year, 1 -hour stormwater runoff and the existing historic 10 -
year, 1 -hour stormwater runoff and provide calculations.
4. Provide the NOAA Atlas 14 ra i nfa I I depth used for each design storm.
I. Provide the calculations used in determining the pre -development and post -development imperviousness for the site.
When calculating the weighted C value for the proposed site, please model the pond water surface area using a 100%
impervious value.
5. Provide a USDA hydrologic soil group map for the site.
Department of Pudic VIcrks I [development Review
1111 H Street, Greeley, CO 89631 Ph: 970-304-6496 www.weldgcv.comldepartmentslpublic_works/development_ review
2/18/2020
Drainage Report Checklist
6. Provide additional calculations for swales or culverts necessary to transport site flows to
the detention pond or other major drainage area on -site. Swale and culvert calculations
should be provided for off -site flows being routed around the site as required. Permanent
control may be required depending an Froud+e Humber.
a. Swales should be sized to convey the 100 -year developed or historic flow plus freeboard.
i. The requirement is a foot of freeboard for flows over 50 cfs.
ii. For flaws under 50 cfs, 1.88 x the design flog may be used.
b. Provide typical sections for all swales.
7. Provide drawings (exhibits/plans) showing stormwater basin delineations for on -site and off -site basins. Provide
arrows showing flow patterns on the map. The exhibits shall show the historic and developed basins, time of
concentration critical path for each basin, relevant design points, drainage structures and culverts, 1' contours, etc.
The developed drainage exhibit (plan) shall show how the developed runoff is conveyed to the pond{s}.
8. Provide a detailed grading plan showing contours (1' minimum) of the proposed pond, site grading and any other
necessary drainage swales or berms. Site grading shall include flow arrows with grades and spot elevations
necessary for construction.
g. Include the design and details for an emergency spillway for the pond(s). Emergency Spillway design standards are
in the Weld County Code.
a. Weld County Code Section 8-11-100. A. - Each detention pond shall contain an emergency spillway
capable of conveying the pear 100 -year storm discharge draining into the detention pond. The invert of the
emergency spillway must be equal to, or above, the 100 -year mater surface elevation. The depth of flaw out
of the emergency spillway shall be 6 inches or less. The spillway must have effective erasion protection. In
order to protect the emergency spillway from catastrophic erasion failure, buried or grouted riprap shall be
placed from the emergency spillway downhill to the embankment tae of slope and covered with 6 inches of
topsoil, if buried. The riprap must be sized at the time of final engineering design. Grouting of the riprap may
be required.
b. 'Meld County Code Section 8-11-100. A. 7 In order to prevent damage to publicly -awned infrastructure (roads,
roadside ditches), a concrete cutoff wall 8 inches thick, 8 feet deep, and extending a minimum of 5 feet into
the embankment on each side of the emergency spillway opening, is required an all privately -maintained
detention ponds and required on a I I regional detention ponds. The concrete cutoff wall permanently defines
the emergency spillway opening. The emergency spillway elevation must be tied back into the top of the
embankment using a maximum slope of 4:1.
10. Meld County Cade Section 8-11-100. A. 5 states "Outlet works should be sized and structurally designed to release
at no more than the 1 -hour, 5 -year historic release rate in urbanizing areas and 1 -hour, 10 -year historic release rate
in non -urbanizing areas without structural or hydraulic failure. Historic is defined as an undeveloped site with a 2.0%
imperviousness. The outlet pipe must contain a minimum of two concrete cutoff walls embedded a minimum of 18
inches into undisturbed earthen sail. The cutoff walls must be a minimum of 8 inches thick. The outlet pipe bedding
material must consist of native earthen soil, not granular bedding material, to at least the first downstream manhole
or daylight paint."
erosion
Department of Public VIorks I [development Review
1111 H Street, Greeley, CO 89631 Ph: 970-304-6496 www.weldgovicomidepartments/public works/development_ review
2/18/2020
Drainage Report Checklist
11. Once the revised design and drainage report have been submitted, the County may
provide additional comments in addition to the ones listed above. Depending on the
complexity of the changes made, n full 28 -day review period may be required.
12. Please provide e written response on how the above comments have been addressed when resubmitting the drainage
report. Thank you.
Department of Public VIorks I [development Review
1111 H Street' Greeley' CO 89631 Ph: 970-304-6496 www.weldgovicomidepartments/public works/development_ review
2/18/2020
titBLACK MOUNTAIN n'tvtaik, ia
mAt;-
ATTACHMENT M.
NOISE REPORT
Black Mountain Sand Weld LLC's (Black Mountain) Lost Creel< Mine (Facility) will be located on private
land in weld County, Colorado approximately 5.0 miles west of the Town of Wiggins and approximately
10.5 miles east of the Town of Roggen. Weld County Road (WCR) 91 runs north- south along the west
side of the project area. The entire project boundary is located within a general land use area used for
rangeland and agriculture. The majority of the area surrounding the site is developed farmland with the
exception of the area approximately 0.25 miles to the northeast/ which is occupied by the Empire
Reservoir and adjacent wetlands.
The Facility has been designed to have a minimum 200 -foot buffer of undisturbed land between all
affected lands and the property boundary, as described in the Use by Special Review ( US R)
Questionnaire (Attachment D1) and the Colorado Division of Reclamation, Mining, and Safety
documentation (Attachment K).
Observations regarding nearby structures are based on a desktop study of Google Earth imagery and
visual observations of the surrounding area during site visits by Black Mountain representatives in
February and June 2019.
The rangeland surrounding the project contains .scattered agricultural ..structures (stock ponds, barns/
and corrals) and oil & gas and water wells. There are no known permanently occupied structures or
homes located within a two-mile radius of the sand wash processing plant and there are no permanent
structures or homes within 200 feet of the property boundary. The closest occasionally occupied
structures are located approximately 1,000 ft to the east of the property boundary. These structures are
campers and mobile homes located at rental lots at the edge of the Empire Reservoir and are not known
to be permanently occupied, based on discussions with local land owners.
All processing equipment will be located within fully enclosed buildings located at the sand wash
processing plant onsite. Equipment located outside at the sand wash processing plant will include four
conveyors to move material between buildings, front-end loaders to load plant feed material onto the
conveyors to feed the plant, and haul trucks to bring the plant feed material from the mine to the plant
feed stockpile. No crushing or blasting will occur at the site. Additional mobile equipment will be used at
the site to excavate material, fill trucks, and transport plant feed and backfill material across the site, as
well as complete reclamation activities. The mobile equipment proposed for use at the site includes
excavators, dozers, front-end loaders, and haul trucks.
Black Mountain has modeled the estimated sound levels at both the property boundary and at the
closest known structures using commonly accepted sound attenuation calculations. Themodel was
completed assuming equipment would be located at the edge of the Zoo -foot buffer and therefore, as
close to the property boundary as possible to estimate maximum sound levels (i.e. worst -case scenario).
Using this conservative assumption, the closest any equipment could potentially be located is
approximately 1,200 ft from the closest occasionally occupied structure.
Estimated sound levels for all proposed pieces of mobile equipment are included in the table below. The
sound levels at the property boundary are estimated to be well below weld County's maximum
industrial permissible noise levels of 80 dB(A) during the day and 75 dB(A) at night.
I
Weld County:
Use by Special Review for Mining Operations
BLACK U TAI SAALril.,
ATTACHMENT M.
NOISE REPORT
Typical Equipment
Measured dB(A)
at source*
Sound
Boundary
Level
at Property
(~200
feet)**
Sound Level
Structure (~1,200
at
Closest
feet)**
Cat 980 wheeled
fader
112.0
66.0
51.0
Cat 374
hydraulic
excavator
108.0
63.0
48.0
Cat
a8 tractor dozer
116.0
69.0
64.0
Cat 770 end
dump
truck
116.0
69.0
64.0
Cat 12N71
motor grader
105.0
61.0
46.0
*Sound levels used were obtained from Caterpillar's online specifications website and represent equipment noise
measured at point of source from equipment. Similar equipment from other manufacturers may he used. Sound
levels are considered representative of typical types of equipment.
**Assumes equipment is at 200 ft buffer line and at grade with line -of -sight to the receptor
The estimated sound levels shown above were calculated assuming relatively flat ground between the
equipment and the x.,200 -foot receptor and that the equipment would he located at grade (Le.
equipment is not located behind a stockpile or in a pit) . It is anticipated that the actual sound levels at
the site will he lower due to actual site topographyip Black Mountain's commitment to shaping and
locating topsoil piles to act as sound harriers when practicable (as discussed in the Nuisance Plana,
located in Attachment I-2), and the relatively high amount of time equipment will he located within pits
instead of at grade. Additionally, Black Mountain may add white noise backup beeper systems to their
mobile equipment to further reduce the -noise potential.
21
Weld County:
Use by Special Review for Mining Operations
BLACK MOUN`CAI S
Attachment I-2
a. Nuisance Plan
b. Lighting Plan Diagram
c. Visual Facility Renderings
Weld County:
Use by Special Review for Mining Operations
pill) BLACK O L1 N TAIN SAND
ATTACHMENT I -2A:
NUISANCE PLAN
Lighting
Included below in the Lighting Plan for Black Mountain Sand Weld LLts (Black. Mountain) Lost Creel
Mine (Facility), an industrial pro p pa nt sand open pit mine and processing plant located in 1111'eld County,
Colorado. The mine is located approximately 5.0 miles west of the Town of Wiggins and approximately
10.5 miles east of the Town of Roggen. Weld County Road (WCR) 91 runs north- south along the west
side of the project area. The entire project boundary is located within a general land use area used for
rangeland and agriculture. There are no permanent residential structures located within a two-mile
radius of the mine's sand awash plant location. Please refer to Figure I -2b, Lighting Plan Diagram, and
Figure I -2c, Visual Facility Renderings.
The processing plant and raining operations are scheduled to run 24 hours a day, 7 days a week, 365
days a year using 3 personnel shifts. Exterior lighting will be required for safety and security purposes
throughout the life -of -nine operations at both the processing plant and in the active pit operations. All
lighting will be installed to conform to the 2017 National Electrical Code. The appropriate electrical
permit will be obtained prior to installing any exterior lighting.
Lighting near the processing plant will include exterior wall lighting for operational safety and security
around all entrances, exits, and other exterior operational areas of all buildings, parking areas
surrounding the maintenance shop/ warehouse and office buildings, the check inkheck out booth and
truck hatch opening and closing facilities, and at the fueling station and ready line. All exterior lighting
will be full cutoff fixtures and will be mounted so that light is directed downward. All light sources will be
shielded so as to minimize up -light, spill -light, glare and unnecessary diffusion onto neighboring
properties.
Sign and entrance lighting will be present at the entrance to the facilities off WCR 91 to assist with
location and safety. The lighting will be designed so as not to create a traffic hazard to motor vehicles
using CR 91.
Pit lighting will be in the form of trailer mounted telescoping light towers. These lights will be used
within the active pit areas and on the temporary haul roads as heeded approximately 10 hours a day,
from dusk to dawn, throughout the life -of --mine. All pit lighting will be full cutoff fixtures and will be
mounted and shielded so that light is directed downward so as to minimize up -light, spill -light, glare and
unnecessary diffusion onto neighboring properties. The light towers will use diesel ,generators.
It is not expected that undisturbed areas or reclaimed areas will need to be lighted. If it becomes
necessary, lighting will conform to the above discussed requirements.
Wag Weld County:
Use by Special Review for Mining Operations
iv*, BLACK MOUNTAIN SAND
ATTACHMENT I -2A:
NUISANCE PLAN
A.N
Noise
The entire project boundary is located within a general land use area used for rangeland and agriculture.
There are no known permanently occupied structures or homes located within a two-mile radius of the
sand wash processing plant and there are no permanent structures or homes within 200 feet of the
property boundary. The closest occasionally occupied structures are located approximately 1,000 ft to
the east of the property boundary. These structures are campers and mobile hones located at rental
lots at the edge of the Empire Reservoir and are not known to be permanently occupied based on
discussions with local land owners.
Mobile equipment proposed for use at the project includes excavators, dozers, front-end loaders,
running trucks, and product haul trucks. The only potential noise sources are from mobile equipment,
primarily from backup alarms. The processing equipment from the sand wash processing plant is fully
enclosed within buildings except fora couple product conveyors that feed the plant. Some of the
equipment will be located below grade at the active mining pit. Other equipment will be moving
between the active mining area and the plant or located at the plant itself. Since there are no
permanent residential structures within a two-mile radius of the sand wash processing plan, it is
expected that very little noise will be detected at the project boundary. Mack Mountain may add white
noise backup beeper systems to their mobile equipment to reduce potential noise.
Topsoil stockpiles will be located and shaped on the edges of the active raining pit areas wherever
practicable to act as sound barriers, further reducing potential noise.
No blasting or crushing is expected or proposed. Product will be stared in on -site silos for
transport off -situ
loading and
21
Weld County:
Use by Special Review for Mining Operations
3882'
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1L1VL
BLACK MOUNTAIN
ATTACHMENT iI-2C:
VISUAL FACILITY RENDERINGS
Weld County:
Use by Special Review for Mining Operations
BLACK MOUNTAIN
ATTACHMENT I -2C:
VISUAL FACILITY RENDERINGS
2 I Page
Weld County:
Use by Special Review for Mining Operations
BLACK MOUNTAIN
ATTACHMENT I -2C:
VISUAL FACILITY RENDERINGS
3IPage
Weld County:
Use by Special Review for Mining Operations
BLACK MOUNTAIN
ATTACHMENT I -2C:
VISUAL FACILITY RENDERINGS
4IPage
Weld County:
Use by Special Review for Mining Operations
BLACK MOUNTAIN
ATTACHMENT I -2C;
VISUAL FACILITY RENDERINGS
6IPage
Weld County:
Use by Special Review for Mining Operations
pp)) BLACK MOUNTAIN -
4.:
ATTACHMENT I -2C:
VISUAL FACILITY RENDERINGS
7Weld County:
Use by Special Review for Mining Operations
Transportation Impact study
Black Mountain Sand Development
Weld Counter, Colorado
UEI Project No. 818.01028
Project Location Map
In Project Study Locations
Emi Proposed Construction Limits
Permit Boundary
Feet
750 7.500
Prepared for
Weld County, Colorado
Prepare' by
Paul Deutsch, P.E.
Ulteig Engineers, Inc.
July 2019
Plant &
Facilities
Empire
'Reservoir
Transportation impact Study
Black Mountain Sand Development
Weld Counter, Colorado
U E I Project No. R18.01028
CERTIFICATION
I hereby certify that the engineering services addressed herein have been performed b
me or under my responsible charge and I am a duly Licensed Professional Engineer in
the State of Colorado.
B:
Ir1 r . ! °belts, ri.E
CO PE 32538
Transportation Impact to dy
Black Mountain Sand Development
Veld County, Colorado
TABLE of CONTENTS
1. Background and Description of Location 1
2. Existing conditions 1
A. Existing Crash Analysis
B. Existing Traffic Demand ..
3. Future Conditions
A. Background Traffic Growth
B. Trip Generation 4
C. Trip Distribution
D. Traffic Projections �
4. Intersection control alternatives — Intersection of DS 34 & cR 91
A. Warrants Guidelines and Analysis �
B. Turn Lane analysis.................iii
C. Acceleration Lane Analysis g
D. Traffic Operations Analysis 10
E. Safety Analysis and intersection Sight Distance 11
5. Intersection Control Alternatives — Intersection of CR 91 & Facility Entrance 13
A. Warrants Guidelines and Analysis 13
B. Turn Lane analysis .i.1 3
C. Acceleration Lane Analysis 13
D. Traffic operations analysis ...14
E. Safety Analysis and Intersection Sight Distance 14
6. Summary of Recommendations 1
A. Intersection of Lab 34 & cR 91 1
B. Intersection of CR 91 & Facility Entrance 1
Appendix 1 — Mine Development Exhibits
Appendix - Crash Data
Appendix 3 — Signal Warrant Analysis
Appendix 4 - Auxiliary Lane Calculations
Appendix — Intersection LOS Report
Appendix 6 — Intersection Sight Distance
. i. i .... .... i.. 6 i i i .... .... . i ...... .. ■■ ....... ... i i ... .... i. i i i. i i .... .. i i. 8
1. Background and Description of Location
Black Mountain sand weld LLC (Black Mountain Sand) plans to develop a region near the
towns of Roggen, Wiggins, and Orchard in Weld County, Colorado. The development will be
located on private property along Weld County Road 91 (CR g1 ) with access to Us Highway
34 (US 34) to the north and Interstate 76 (I-76) to the south, though 1-76 is not expected to be
used as a primary access route because of limited interchange facilities. Proposed plans
include the development of an open pit mine (Lost Creek Mine), a 2.4 million ton per year
(Mtpy) industrial proppant sand production facility. The development will trigger the paving of
CR 91.
This Transportation Impact Study has been prepared to evaluate the operational impact of
increased traffic at the intersection of US 34 & CR 91 due to the development of the mine, as
well as the operational impact to CR 91 at the facility entrance. The impost at the 1-76
interchange is outside the scope of this study. See Appendix 1 for an exhibit of the proposed
development.
The purpose of this study is to recommend the most appropriate traffic control improvements
for the intersection of LAS 34 & CR 91, as well as the at the facility entrance to CR 91. Five
alternatives are considered in this report at the intersection of US 34 & CR 91:
• Alternative 1 No Changes (Minor -Road stop)
• Alternative — Turn Lane Improvements
• Alternative 3 — All -'Way stop
• Alternative Traffic Signal
• Alternative 6 — Roundabout
Non-traditional types of intersections were not examined to keep analysis within scope.
Additionally, Safe Routes to school (SRTS), Bike/Ped, and Public Transit Analysis were also
removed from the scope of this study because of the rural location.
a Existing Conditions
Us 34 is a federal highway, classified as Regional Highway (R -A: Principal Arterial) in 'Feld
County. It is a two-lane undivided highway that runs east -rest near the development location.
CR 91 is classified as Gravel Local in Weld county and is stop -controlled at the intersection
with US 34. The intersection of US 34 & CR 91 is a T -intersection with the stem on the south
approach. The nearest intersection to the west is Weld County Road 89: approximately 1 mile
to the west. The nearest intersection to the east is veld County Road 93 1/2, approximately
1.6 miles to the east. There also appears to be four approaches along US 34 within 1000 feet
of the intersection, two to the crest, and two to the east.
The posted speedlimit is 65 mph along US 34 and the assured speed limit is 55 mph along
cR 91.
The intersection lies on a tangent, and highway terrain has flat grades in the area.
According to the 'Meld county interactive GIS map, land use at the intersection of US 34 &
cR 91 is zoned as "Agricultural." The northwest, southwest, and southeast quadrants of the
intersection have been developed into farmland, but the northeast quadrant is mostly
undeveloped due to proximity to south Platte Diver and its floodplain. The nearest towns are
Orchard (7 miles to the northeast) and Wiggins gins (9 miles to the southeast). Empire Reservoir
is a large private lake about 2 miles to the southeast.
A. Existing Crash Analysis
-year crash history analysis was made based on crash data provided by CDOT
from the most recent period available, 1/112013-12/31/2017. The type and severity of
the crashes were reviewed and are summarized in Table 1 and Table 2. A 5 -gear time
frame typically provides sufficient information for safety analysis for rural roadways.
The crash analysis indicated zero (0) intersection related crashes, but there were two
(2) crashes within the functional area of the intersection. There were zero (0) injuries
associated with either of the crashes, which were a result of a single vehicle and a gild
animal.
Location
Right
Angle
Rear
End
Turn~
Left
Sdswp.
oppos.
Dir.
Backing
Head
-on
Pod
Bike
/
Ran
Off
Road
Wild
Animal
Total
Intersection:
US 34&CR01
0
0
Q
0
Q
0
0
0
0
0
US
intersection
Segment:
34
functional
area
within
of
0
0
0
0
0
0
0
0
2
2
Table 1: Types of crashes (2013-2017)
Crash rates are expressed as the number of crashes per million vehicle -miles for a
segment.
Location
Fatal
Injury
Property
Damages
Total
Crashes
Crash
Rate
Intersection;
US
34
&CR91
�
�
0
0
0.00
U5 34
area
Segment:
within
of
functional
intersection
0
0
2
2
0.48
,
Table 2: Crash Severity and Crash Rates (2013-2017)
The crash history at this location does not indicate any crash tendencies with the
exception of wild animals.
B. Existing Traffic Demand
According to CDOT T Online Transportation Information System (OTIS), there were two
ADT traffic counts within the last 10 years. A 12 -hour traffic count was also conducted
as part of this study to determine current traffic volume.
Average Daily Traffic (ADT)
Year
US 34 1 CR91
2010
4,915
Unknown
2015
5,582
Unknown
i
2013*
5,902
35
*Extrapolated from 12 -hour traffic count
Table 3: Average Daily Traffic (ADT)
Peak hour traffic counts were collected in February, 2019. In Table 4, the existing peak
hour turning movement volumes are presented. Heavy vehicle percentage was found
to be 23% along US 34 with no pedestrians encountered. An average passenger car
equivalency (PCE) factor of 2.5 was applied to the existing heavy vehicle volume
according to the State Highway Access Come. To determine typical annual peak hours,
a monthly adjustment factor of 1.04 was applied based on the Traffic Engineering
Handbook (7th Ed.) for rural areas in the month of February.
Year
Westbound
U5
34
Northbound
CFA
91
Eastbound
US
34
Total
Peals
Hour
L
T
R
L
T
R
L
T
R
Typical
AM
Peak
2019
1
288
0
0
0
1
0
239
8
537
Typical
PM
Peak
2019
0
298
0
0
0
1
0
374
3
676
Table 4: Existing 2019 Peak Hour Turning Movement PCE Volume
Intersection of Us 34 & cR 91
. Future Conditions
Local agencies would like to ensure that the design of the intersection of CJ's 34 & cR 91
properly accounts for the change in traffic demand due to this development. The intersection
of Us 34 & CFA 91 will be the primary point of access for traffic going to and from the proposed
mine development.
A. Background Traffic Growth
Assuming a construction year of 2019, 20 -year traffic projections were made for the
year 2039. According to CDOT Online Transportation Information System (OTIS), the
20 -year growth factor for US 34 is 1.31 in the project study area. This correlates to an
annual growth of about 1.36%.
B. Trip Generation
Additionally, trip generation was added to existing traffic demand based the proposed
nine development, scheduled to be constructed late 2019. The mine is expected to
employ 145 employees on site, with shift employees changing at 7:00am, 3:00pm, and
11:00pm. Product transport will be ongoing 365 days a year, 24 hours a day.
The Institute of Transportation Engineer's (ITE) Trip Generation Manual (9t" ed.) was
sourced for AM PI peak hour trips. Input from the developer, Black Mountain sand,
was sourced for daily trips and heavy vehicle rates.
Multiple land uses were considered, and "General Light Industrial" (code: 110) has
the most reliable data to describe the mine's AM & PM peak hour trips. ITE description
excerpt: "Light industrial facilities usually employ fewer than 500 ,persons, they have
an emphasis on activities tither than manufacturing and typically have minimal office
pace."Tabl'e 5 shows the results of trip generation. The mine is expectedto generate
850 trips in + out) on a typical day, including 600 product delivery trips. Accounting
for passenger car equivalents (PCE) of 3.0 for product delivery, the mine is expected
to generate 2050 P E trips (in + out) on a typical day.
Trip
Generation (2019-2039)
I
Land
d+�
Use
Land
Use
Pass -By
Rats
Daily
Trips
(veh)
AM
(weh
Peak
f
hr)
Hour
PM
(vehi
Peak
Hour
hr)
Total
IN
OUT
% of
Daily
IN
OUT
% of
Daily
IN
OUT
110
General
Light
Industrial
0%
850
425
425
14.5%
102
21
14.0%
26
93
Table 5: ITE Trip Generation for Mine
Weld county has indicated that they do not expect any new development or growth in
the project study area beyond the mine development.
C. Trip Distribution
In addition to trips generated by the mine, trip distribution estimates for product delivery
and employee commutes were applied to the intersection of US 34 & CR 91 and at
the facility entrance. Input from the developer, Black Mountain sand, was sourced for
trip distribution and then further refined based on discussion and analysis.
The developer expected that 100°'/'0 of traffic will access the site along cR 01 from the
north via the existing intersection with US 34, which was likely based on the limited
interchange facility and small turning radii to the south at 1-T0. However, it is believed
that the limited interchange facility would not inhibit employees from using it to
commute to the site. Also, it is believed that product deliveries could still use the
interchange facility for access to the westbound 1-70 on -ramp, particularly while gas
production grows in the Keenesburg area.
• For inbound product delivery, it is estimated that 100% of trips will travel
through the intersection of US 34 & cR 91 (85% from the crest, 15�'r�o from the
east).
• For outbound product delivery, it is estimated that 90% of trips will travel
through the intersection of Us 34 & cR 91 (75% to the crest, 15% to the east).
The proximity and population of nearby towns were used to estimate the trip
distribution of employee commutes. See Table 6 below for nearby employee commute
influences.
City
Distance
from Site
Primary
Access
Direction
Population*
Wiggins
10
SE
996
Keenesburg
21
SW
1f229
Fort
Morgan
26
SE
11,359
Hudson
28
SW
1,838
Greeley
32
NW
107,348
Brush
35
SE
5,384
Denver suburbs
40
SW
tv
*based an US Census Burea u (2018)
Table 6: Employee Commute Influences of Population and Proximity
It is estimated that 45% of employees will commute from Greeley area (NW), 45% will
commute from the Denver/Fludson/Meenesburg area (SW), and 10% will commute
from the Wiggins/Fort Morgan/Brush area (SE).
• For inbound and outbound employee commutes, it is estimated that 45% of
trips will travel through the intersection of Us 34 & CR 91 45% to/from the
west: 0% to/front the east) because of commutes from the Greeley area.
Dm Traffic Projections
With the new traffic demand and an annual increase in background traffic, the
assumed year of opening (2019) and 0 -year projected (2039) turning movement
volumes are presented in Table 7 and Table 8, which include a P E factor of 3.0 for
all heavy vehicle trips generated by the aline.
Peak
Hour
Year
Westbound
US 34
Northbound
CR
91
Eastbound
US 34
Total
L
T
R
L
T
R
L
T
R
Ty
p i ca I
AM
Peak
2019
27
288
0
31
0
6
0
239
174
765
Ty
p i ca I
PM
Peak
2019
6
298
0
129
0
23
0
374
43
d
873
Typical
AM
Peak
2039
27
377
0
31
0
6
0
313
176
930
Tyr
p i ca I
PM
Peak
2039
6
390
0
129
0
23
0
490
44
1,082
Table 7: Projected Peak Hour Turning Movement PCE Volume
Intersection of US 34& C R 91
Southbound
CFA
91
Northbound
CFA
91
Westbound
Mine Entrance
Total
Year
Peak
Hour
L
T
R
L
T
R
L
T
R
Typical
AM
Peak
2019
192
0
0
0
0
25
9
0
36
262
Typical
PM
Peak
2019
46
0
0
0
0
7
39
0
151
243
Typical
AM
Peak
2039
192
0
0
0
0
25
9
0
36
262
Typical
PM
Peak
2039
46
0
0
0
0
7
39
0
151
243
Table 8: Projected Peak Hour Turning Movement PCE Volume
Intersection of CR 91 & Facility Entrance
4. Intersection Control Alternatives — Intersection of US 34 & CR 91
The Manual on Uniform Traffic Control Devices (MUTCD) provides guidance for warrants of
traffic signals and multi -moray stop applications (all -way stops). If any warrants are met based
on minimum levels of traffic, crashes, or pedestrians, the intersection control may be justified
for signalization or an all -way stop. Roundabouts should also be considered if either a traffic
signal or all -way stop are warranted. If a warrant is satisfied, the traffic control may be justified
based an engineering judgment.
For this project, the types of traffic control considered include no changes (minor -road stop),
turn lane improvements, all -way stop, traffic signal, and roundabout.
* Alternative 1: No Changes
o The intersection of 's 34 & Cif 91 would have no changes.
• Alternative : Tura Lane Improvements
Right turn lane for eastbound traffic is recommended.
Left turn lane for westbound traffic is recommended. There is already an
existing westbound left turn lane, so it is recommended that it be extended to
modern design standards.
O Median acceleration lane for westbound traffic is recommended to
accommodate northbound left tern movements.
Alternative 3: All -Way Stop
Although a detailed hourly analysis was outside the scope of this report, a brief
analysis of peak hour traffic data indicated an all -way stop would not be
warranted used on traffic volumes.
• Alternative 4: Traffic Signal
Although a detailed hourly analysis was outside the scope of this report, a brief
analysis of peak hour traffic data indicated a signal would not likely be
warranted based on traffic volumes. See Appendix 3 for signal warrant report
output.
• Alternative 5: Roundabout
o As a rule of thumb, roundabouts may be considered to be warranted if an all-
way stop or a traffic signal is warranted, but this is general guidance. Since
volumes are likely too lour to warrant an all -way stop or a traffic signal, and
there are no site -specific safety issues noted at the intersection location, then a
roundabout is not warranted.
. Warrants Guidelines and Analysis
The all -gray stop and traffic signal alternatives were eliminated from consideration after
brief analysis with MUTCD multi -way stop applications and traffic signal warrants.
Including trip generation due to the new mine, traffic volumes are still too lour on eR
1 to warrant an all -way stop or a traffic signal, including higher traffic summer
conditions.
Roundabouts are feasible at high-speed rural intersection and three -leg intersections
(among other characteristics). As a rule of thumb, roundabouts may be considered to
be warranted if traffic volumes meet criteria for either a traffic signal or an all -way stop,
but site -specific safety issues may also warrant a roundabout. Since neither an all -way
stop nor a traffic signal are warranted, and there are no site -specific safety issues
noted at the intersection location, then a roundabout is not warranted.
B. Turn Lane Analysis
The CDOT 2018 Roadway [design Guide does not provide warrants for turn lanes, but
does conclude that "Speed -change lanes are warranted on high-speed and high -
volume highways where a change in speed /s necessary for vehicles entering or
leaving the through traffic lanes? With Us 34 being posted for speed limit of 65 mph,
it is advantageous to allow turning traffic to slow down in a deceleration lane rather
than a through lane, causing following vehicles to brake, and thus a higher potential
for rear -end crashes.
The State Highway Access Code, which CDOT applies on matters of development
and access, states that a Regional Highway (Categoly R -A) shall have deceleration
turn lanes based on projected pear hour turning volume (10 vph for left turn lane, 25
vph for right turn lane), and the study location surpasses those thresholds. Therefore,
an eastbound right turn lane and westbound left turn lane are required. Calculations
are shown in Appendix 4.
It is recommended to add an eastbound right turn lane along Us 34 at the intersection
with C R 01. According to State Highway Access code, the deceleration length is 300
feet, with 0 feet of storage, and a 25:1 taper that is included in the deceleration length
(full -width turn lane = 500 ft, taper = 300 ). With a relatively high volume and
percentage of heavy vehicles, additional consideration is justified to separate the taper
from the desirable full deceleration length (full -width turn lane = 300 ft, taper = 300 ft)
if feasible. Based on aerial imagery, there appears to be an existing approach driveway
about 025 feet west of the intersection, and its location should be taken into
consideration as well, because it is undesirable to have an approach within the
functional area of the turn lane. This approach should be considered for removal or
relocation if designed to be adjacent to the turn lane or turn lane taper.
It is recommended to update the existing westbound left turn lane along US 34 at the
intersection with cR 91 with modern design standards. According to State Highway
Access Code, the deceleration length is 800 feet, with 25 feet of storage, and a 25:1
taper that is included in the deceleration length (full -width turn Kane = 525 ft, taper =
300 ft).
C. Acceleration Lane Analysis
The State Highway Access Code states that a Regional Highway (Category R -A) may
require a left turn acceleration lane if it would be a benefit to the safety and operation
of the roadway due to unique location factors such as, but not limited to highway speed
and volume of commercial trucks. With these unique location factors taken into
consideration and discussion, CDOT has requested the installation of a westbound
acceleration lane to accommodate northbound left turn to westbound movements.
It is recommended to add a westbound acceleration lane along Us 34 at the
intersection with. cR 01. According to Mate Highway Access Code, the acceleration
length is 1330 feet with a 25:1 taper that is included in the acceleration length (full -
width acceleration lane = 1030 ft, taper = 300 ft). With a relatively high volume and
percentage of heavy vehicles, additional consideration is justified to separate the taper
from the desirable full acceleration length (full -width acceleration lane = 1380 ft, taper
= 300 ft) if feasible. Calculations are shown in Appendix 4.
Since the Mate Highway Access Code does not specify the design of acceleration
lanes for undivided highways, it is believed that the addition of a downstream buffer
area will provide an additional element of safety for comfortable and safe merge
maneuvers into the traffic stream. A minimum 300 foot buffer such as a painted median
is recommended to fallow the acceleration lane taper, serving as an emergency buffer
area for merging vehicles in the event that no adequate gap is available at the end of
the taper, and thus a potential conflict with eastbound vehicles.
There appears to be three approaches in the functional area of the proposedmedian
acceleration lane (2 on south side, 1 on north side) which should be considered for
removal or relocation if feasible. Additional elements of safety to consider in design
include special signage and added physical separation space between the
acceleration lane and the eastbound through lane.
D. Traffic Operations Analysis
An analysis of traffic operations was conducted to determine the delays and level of
service (LOS) during typical AM and PM peak hours.
The LOS describes the efficiency of an intersection based on delays by designating
letters A, B, C, D, E and F, where A► represents the lowest delays and F represents the
highest delays and severe congestion. Typically, Los D or better is an acceptable
measure of delay for 20 -year projections.
Control
(sec/veh)
Delay
LOS
0-10
A
X10-15
B
X15-25
C
>25-35
D
>35-5t1
E
>50
F
Table 9: LOS Criteria for Unsicgnalized
Intersections (HCM2010)
Intersection Los was analyzed using Synchro software for proposed conditions for
AM and PM peak hours, under projected year of construction (2019) and projected 20 -
year (2039) traffic volume. The proposed conditions suggested are described in the
alternatives listed in section 4 of this report. Alternatives 3, 4, and 5 (all -way stop,
traffic signal, and roundabout) were not analyzed because they have previously been
removed from consideration. The results of the analysis are shown in Table 10 and
Table 11. The Synchro LOS report is in Appendix 5.
Approach
Alternative
Delay
(seconds/I/eh)
1-
No
Changes
and
LOS
(A -F)
Intersection
Peak
Hour
2019
2039
EB
W B
NB
EB
W B
NB
(Typical
U564&CR91
Peak
Hour)
AM
0.0
0.7
12.5
0.0
0.6
16.8
*
*
B
*
*
B
PM
0.0
0.2
15.7
0.0
0.1
19.1
*
*
C
*
*
C
*Free movement, LOS doesn't apply. Minimal delay shown is due to left turns along major road
Table 10: Approach Delay and Los for Alternative 1
Approach
Alternative
Delay
(secondsiveh)
2 -
Turn
Lane
Improvements
and
LOS (A -F)
Intersection
Hour
Hou
2039
r
EB
W B
NB
EB
' B
NB
(Typical
U564&CR91
Peak
Hour)
AM
'I
0.0
0.7
11.2
0.0
0.5
12.1
.
*
*
B
*
*
B
PM
0.0
0.2
16.8
0.0
0.1
16.0
*
*
B
*
*
C
*Free movement, LOS doesn't apply. Minimal delay shown is due to left turns along major road
Table 11: Approach Delay and Los for Alternative 2
Alternatives 1 and 2 exhibited minor to moderate delays for northbound traffic during
both peak hours, for both 2919 and 2039. Minor street traffic experiences these delays
while waiting for acceptable gaps to enter the traffic stream along Us 34. Alternative
2 had slightly lower delays than Alternative 1, but both alternatives exhibit acceptable
LOS for all traffic.
E. Safety Analysis and Intersection Sight Distance
There were zero (g) intersection -related crashes in the most recant -year period and
no changes in traffic control are recommended. While there will be increasing traffic
volume due to the mine development and background traffic growth, constructing an
eastbound right turn lane and updating the westbound left turn lane to modern
standards will keep the likelihood of crashes at the intersection lour. See section 4.
for safety considerations with the median acceleration lane.
Intersection sight distances were evaluated at the intersection of Us 34 & cR 91
according to the 2011 AASHTO Green Book and the State Highway ,Access Code,
11
assuming Alternative 2 would be the preferredalternative. Details of the calculations
are in Appendix 6. Based on the analysis, it was determined that sight triangles appear
to be free of obstructions, but it should be verified during the design phase of the
project.
Figures I & 2: Intersection of US 34 & CR 91, looking west and east
stopping sight distance analysis was outside the scope of this report, but web -based
street -view observations i n d i cated that cR 91 may have sight lines obstructed by a
crest curve near CJs 34. With this possible sight obstruction near a T -intersection, a
recovery approach should be considered at the north side of the intersection to support
potential runaway northbound vehicles. This approach could replace one of the two
approaches along the north side of Us 34 that are within the functional area of the
intersection.
Figure 3: Intersection of Us 34 & cR 91, looking south
5. Intersection Control Alternatives — Intersection of CFA 91 & Facility Entrance
For the proposed intersection of CFA 91 & facility entrance, a brief analysis was made on traffic
control alternatives.
A. Warrants Guidelines and Analysis
With lower projected volumes than the intersection of Us 34 & CR 911 it is assured
that a traffic signal, all -way stop, and roundabout are not warranted at the intersection
of CR 01 & facility entrance.
B. Turn Lane Analysis
According to the Improvements & Road Maintenance Agreement of Weld county,
auxiliary lanes into the development site are required based on projected traffic volume
for an average daily peak hour (10 vph for left turn lane, 25 vph for right turn lane).
This study location surpasses those thresholds, but only the southbound left turn lane
is recommended at this time at the intersection of CR 01 & facility entrance. The
northbound right turning traffic volume only meets the minimum peak hour requirement
(25 vph), and the operational and safety benefits of removing decelerating traffic from
the through traffic lane are negated due to the extremely low volume of northbound
through traffic.
It is recommended to add a southbound left turn lane along CFA 91 at the facility
entrance. According to 2012 Weld County Engineering ring and Construction Guidelines
(Updated July 2017), the deceleration length is 600 feet, with 100 feet of storage, and
a 18.5:1 taper that may be included in the deceleration length (full -width turn lane =
480 ft, taper = 220 ft). Calculations are shorn in Appendix 4.
C. Acceleration Lane Analysis
According to the Improvements & Road Maintenance Agreement of Weld county, right
turn acceleration lanes out of the development site are required based on projected
traffic volume for an average daily peak Dour (60 vph). This study location surpasses
that threshold, but a right turn acceleration lane is not recommended at this time at the
intersection of CFA 01 & facility entrance. The operational and safety benefits of
removing accelerating traffic from the through lane are negated due to the extremely
lour projected volume of northbound through traffic.
D. Traffic Operations Analysis
An analysis of traffic operations was conducted to determine the delays and level of
service (LOS) during typical AM and PM peak hers, assuming a minor -road stop for
approaching westbound traffic.
Intersection LOS was analyzed using Synchro software for proposed conditions for
AM and PM peak hours, under projected year of construction (2019) and projected 20 -
year (2039) traffic volume. The proposed conditions suggested include a southbound
left turn lane. The results of the analysis are shorn in Table 12.
Approach
Delay
Turn
(secondsiveh)
Lane
Improvements
and
LOS (A -F)
Intersection
Peak
Hour
2019
2039
WB
BNB
SB
WB
BNB
SB
CR
91
(Typical
&
Facility
Peak
Entrance
Hour)
AM
9.4
0.0
7.6
9.4
0.0
7.6
A
*
*
A
*
*
RBI
9.4
0.0
7.3
9.4
0.0
7.3
i
A
*
*
A
*
*
* Free movement, Losdoesn't a pplY. rvlinimal delay shown is due to left erns along major road
Table 12: Approach Delay and LOS
The proposed intersection of aR 91 & facility entrance exhibited minor delays to all
movements during, both peak hours, for both 2019 and 2039.
E. Safety Analysis and Intersection Sight Distance
There is no crash history at this location, so analysis of crashes is not possible.
However, crashes with wildlife in this region are not uncommon. The proposed
geometry of the intersection is not unusual. A southbound left turn lane is
recommended based on turning volume. Therefore, the likelihood of crashes at the
intersection is lorry as long as there are no obstructions within sightlines.
Intersection sight distances were evaluated at the intersection of aR 91 & facility
entrance according to the Weld County Engineering and construction Guidelines,
assuming a southbound left turn lane would be constructed. Details of the calculations
are in Appendix 6. Sightliines should be verified during the design phase of the project
to ensure that sight triangles are free of obstructions.
It is recommended that existing approaches along aR 91 be converted to right-angle
approaches, which are preferable to skewed angle approaches.
14
6. Summary of Recommendations
A. Intersection of US 34 & CR 91
Five alternatives were considered for this transportation impact study, but Alternative
3 (All -'flay Stop), Alternative 4 (Traffic Signal), and Alternative 5 (Roundabout) were
eliminated from consideration because of low traffic volumes.
Alternative 1 (No Changes) and Alternative 2 (Turn Lane Improvements) were
analyzed for safety i m prove m e n is and projected LOS. Based on the analysis,
Alternative 2 is recommended at the intersection of US 34 & cR 91. Projected traffic
volume for the expected construction year (2019) exceeds the threshold for turn lanes
according to State Highway Access code and a median acceleration lane is also
recommended. Design criteria and safety considerations are described in section of
this report.
The intersection of US 34 & CR 91 has a possible sight obstruction for northbound
vehicles approaching a T -intersection due to a crest curve. Therefore, a recover}
approach should be considered at the north side of the intersection to support potential
runaway northbound vehicles. This approach could replace one of the two approaches
along the north side of US 34 that are within the functional area of the intersection.
E. Intersection of CFA 91 & Facility Entrance
At the intersection of cR 91 & facility entrance, a southbound left turn lane is
recommended. Projected traffic volume for the expected construction year (2919)
exceeds the threshold for turn lanes according to the improvements & Read
Maintenance Agreement of Weld County. Design criteria are described in section 5 of
this report.
It is recommended that existing approaches along CFA 91 be converted to right-angle
approaches, which are preferable to skewed angle approaches.
Appendix 1
Mine Development Exhibits
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Appendix 2
Crash Data
COLORADO
inev nutmeat of Tadins poct.atton
Colorado Department of Transportation
f i xSy s TM Roadways Safety Systems
General Summary of Crashes Report
02/20/2019
Job #: 2019 220134 010
Location: 34A
Begin: 130.00 End:141.00 From:01 /01/2013 To:12/31 /2017
Severity
PDO:
INJ:
FAT:
12
3
0
Total: 15
3 :Injured
0 :Milled
Number of Vehicles
One Vehicle:
Two Vehicles:
Three or More:
Unknown:
14
1
a
0
Total: 15
Location
On Road:
Off Road:
U nknown:
13
2
0
Total: 15
Mainline/Ramps/Frontage Rds
Mainline:
Ramps:
Frontage/Ramp Intsx:
Frontage Roads:
HOV Lanes:
U nknown:
15
0
0
0
0
0
Total: 15
Lighting Conditions
Daylight:
Dawn or Dusk:
Dark - Lighted:
Dark - Unlighted:
U nknown:
3
0
12
0
Total: 15
Crash Rates
PDO: 0.74
I U: 0.19*
FAT: 0.00**
* Per MVMT
** Per 100 MVMT
Total: 0.93
*
Crash Type _
Overturning:
Other Non Collision:
Pedestrians:
Broadside:
Head On:
Rear End:
Sideswipe Same:
Sideswipe Opposite:
Approach Turn:
Overtaking Turn:
Parked Motor Vehicle:
Railway Vehicle:
Bicycles:
Domestic Animal:
Wild Animal:
Fixed Objects:
Other Objects:
Unknown:
2
0
0
0
a
0
0
1
0
0
0
0
0
0
12
0
0
0
Total:
15
Vehicle Types
Weather Conditions
None:
Rain:
Snow/Sleet/Hail:
Fog:
Dust:
Wind:
Unknown:
13
2
0
0
0
0
0
Total: 15
Road Conditions
Dry:
Wet:
Muddy:
Snowy:
Icy:
Slushy:
Foreign Material:
With Road Treatment:
Unknown:
13
2
0
0
0
0
0
0,
0
Total: 15
Vehicle 1
Passenger Car/Van:
Passenger Car/Van wlTrailer:
Pickup Truck/Utility Van:
Pickup Truck/Utility flan \At/Trailer:
SUV:
SUV wlTrailer:
Truck 10k Ibs or Less:
Trucks > 10k IbsfBusses > 15 People:
School Bus < 15 People:
Non School Bus < 15 People:
Matorhome:
Motorcycle:
Bicycle:
Motorized Bicycle:
Farm Equipment:
Hit and Run - Unknown:
Other:
Unknown:
Vehicle 2
7 1
0 0
5 0
0 0
3 0
0
a
0
0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0
0
0
0
0
0
Vehicle 3
0
0
0
0
0
0
0
0
0
0
0
0
Total: +15 1
0
ADT: 4,380
Length: 2.02
Any intentional orinadvertant release of this data or any data derived from
its use shall not constitute a waiver of privilege pursuant to 23 USC 409.
'age 1
User: mundtt on CDOTC1VO74261X3
Appendix
Signal Warrant. Analysis
Warrants Summary Report
7: US34 CR91
Intersection Information:
Major Street Miner Street
Street Name
US 34
C R 91
Direction
EB/WB
NB
Number of Lanes
2
1
Approach
Speed
55
55
Warrant
Islet?
Notes
Warrant I , Eight -Hour Vehicular Volume
Condition A or B Met?
1 Hours met (8 required)
Condition A and B Met? N a 1 Hours met ($ required)
Warrant 2, Four -Hour Vehicular Volume
No
1 Hours met (4 required)
Warrant 3, Peak Hour
Condition A Met?
Condition B Met?
Q Hours met (1 required)
0 Hours met (1 required)
Warrant 4, Pedestrian Volume
Condition A Met?
Condition B Met?
0 Hours met (4 required)
0 Hours met (1 required)
Federal 2009 1
Intersection Information:
Major Street
Minor Street
Street
Name
US 34
C R 91
Direction
EEC/WB
NB
Number of
Lanes
2
I
Approach
Speed
65
55
'Tarrant
Islet"'?'
Notes
Warrant 55 School Crossing
No
Warrant 6, Coordinated Signal System
No
Warrant 7, Crash Experience
in
No
Traffic Volume Condition? No 0 Hours reset {8 required}
Ped Condition? No 1 Hours met (8 required)
Warrant 85 Roadway Network
No
Warrant 95 Intersection Roar a Grade Crossing
Federal 2009
Intersection Information:
Major Street
Minor Street
Street
Name
US 34
C R 91
Direction
E
B/WB
NB
Number of
Lanes
2
�I
Approach
Speed
5
55
'Tarrant
Islet?
Notes
AkWSC Warrant, Multiway Stop Application
Condition A Islet?
Condition B Met?
Condition C Met?
Federal 2009
lin No
No
allo
Warrant 1: Eight -hour Vehicular Volume
1: US34 CR91
Intersection Information:
Major Street
US 34
Major Direction
EBANB
Minor Direction
NB
Warrant 1 Met?
Details:
Condition A or B Met?
No
1 Hours met (8 required)
Condition A and B Met?
1 Hours met (8 required)
Hour
Major
Street
Vehicles
(total of
both
approac
hes)
Condition A
Condition B
Condition A
Condition B
70% Standard
Met? Cond. A
O••R Cond. B
56% Standard
Met? Cond. A
AND Cond. B
'Volume I Volume
>= 70% >= 56%
column I column
(420)? I (336)?
I
I
Volume • Volume
>= 70% >= 56%
column I column
(630)? I (504)7
I
I
High-
volume
Minor
Approac
h
Vehicles
Volume I Volume
>= 70% >= 5670
column I column
(105P I (84)?
I
Volume I
>= 707o
column I
(53)? I
I
Volume
>= 56%
column
(42P
Conditio ConditioConditio
n A 70% n B 70%
Column Column
Conditio
n A 56% n B 56%
Column Column
08:00 to 09:00
804
Yes
I
Yes
Yes
I
Yes
36
No
I
No
No
I
No
No
No
No
No
08:15 to 09:15
603
Yes
I
Yes
No
I
Yes
27
No
I
No
No
I
No
No
No
No
No
08:30 to 09:30
402
No
I
Yes
No
I
No
18
No
I
No
No
I
No
No
No
No
No
08:45 to 09A5
201
No
I
No
No
I
No
9
No
I
No
No
I
No
No
No
No
No
16:15 to 17:15
796
Yes
I
Yes
Yes
I
Yes
144
Yes
I
Yes
Yes
I
Yes
Yes*
Yes'
Yes*
Yes*
16:30 to 17:30
597
Yes
I
Yes
No
I
Yes
108
Yes
I
Yes
Yes
I
Yes
Yes
No
Yes
Yes
16:45 to 17A5
398
No
I
Yes
No
I
No
72
No
I
No
Yes
I
Yes
No
No
No
No
17:00 to 18:00
199
No
I
No
No
I
No
36
No
I
No
No
I
No
No
No
No
No
Federal 2009
4
Warrant 2: Four-hour Vehicular Volume
1: US34 CR91
Intersection Informatior
Major Street Minor Street
Street Name
US 34
C R 91
Direction
EB/WB
NB
Number of Lanes
2
1
Approach
Speed
55
55
Warrant 2 Met?
No
Details:
Notes: 1 Hours met (4 required)
Low Population?
Yes
_ 40D
a_
0
300
-5 nn0
s
100
C_
�0
Four -Hour Vehicular .Volume
Community Population Less Than f 0,000 or Major Street Approach Speed Above 40 mph
•
200 300 400°0 6 .B0D SOO1
M apr Street - Taal of Both approaches ''PH)
Warrant Curve
0 Warta n tied
• Unwarranted
1 IV1i r, 1 Minor
1 Maur, 2+ Minor
2= MajCi,1 Minor
2+ Major, 2+ Minor
Federal 2009
5
Hourly Volumes
Hour
Major Street Total of both approaches (VPH)
00:00:00 _ 01:00:00 0.00
01:00:00 - 02:00:00
0.00
02:00:00 - 03:00:00
0.00
03:00:00 - 04:00:00
0.00
04:00:00 - 05:00:00 0.'0'0
05:00:00 - 00:00:00
0.00
06:00:00 - 07:00:00 0.00
07:00:00 - 08:00:00
0.00
08:00:00 - 09:00:00
804.00
09:00:00 - 10:00:00
0.00
10:00:00 - 11:00:00 0.00
11:00:00 - 12:00:00
0.00
12:00:00 - 13:00:00
0.00
13:00:00 - 14:00:00
0.00
14:00:00 - 10:00:00 0.00
15:00:00 - 10:00:00
0.00
10:00:00 - 17:00:00
597.00
17:00:00 - 18:00:00
199.00
18:00:00 - 19:00:00
0.00
19:00:00 - 20:00:00
0.00
20:00:00 - 21:00:00
0.00
21:00:00 - 22:00:00
0.00
22:00:00 - 23:00:00
0.00
23:00:00 - 00:00:00
0.00
Federal 2009
Federal 2009
2
6
Minor Street Highest volume approach (VPH)
0.0'0
0.00
0.00
0.00
0.00
0.00
0.0'0
0.00
30.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
108.00
30.00
0.00
0.00
0.00
0.00
0.00
0.00
7/9/2019
Warranted Hours
Hour
16:1a:00 - 17:15:00
Major Volume
796.00
Minor Volume
144.00
Nate: Only data of hours warranted is represented in the above table.
Federal 2009 7
Warrant 3: Peak Hour
7: US34 CR91
Intersection Information:
Major Street Minor Street
Street Name
US 34
CR 91
Direction
EB/ B
NB
Number of Lanes
2
1
Approach
Speed
65
55
Warrant 3 Met?
No
Details:
Low Population?
Yes
Condition A Met?
Notes:
No
9 Hours met (1 required)
Minor Approach Time Delay Condition
Minor Approach Volume Condition
Total Entering Intersection Volume Condition
Not Met
Met
Not Met
Condition B Met?
Notes:
No
0 Hours met required)
Federal 2009 8
Warrant 3
Peak Hour Vehicular Volume
Community Population Less Than 10,000 or Major Street Approach Speed Above 4C1 mph
�nn
V V V
4O0 —
Wen
"
f u -i —
10 -
1
a
a
t
I
1
1
t
1
1
1
I
1
1
t
i
1
1
I
1
1
1
1
t
1
i
1
•
1
1
1
1
1
1
I
1
i
i
1
1
I
1
1
1
1
1
1
1
0 T
400 500 600 700 800 9vC 1 x30 1100 1200 13{0
Majar Street -Total of BLth 4.pproache=
Federal 2009 9
— Warrant Curve
® Warranted
# Unwarranted
1 Major, 1 Minor
1 Major, 2+ Minor
am 2+ Major, 1 Minor
2'+. Major, 2+ Minor
Note: Please turn over for volume information.
Warranted
1 Unwarranted
Hour
Major Street
approaches
Total
of both
(VPH)
Minor Street
approach
Highest volume
(VPH)
8:00
804
36
1 6:1 5
796
144
Federal 2009
3
Federal 2009 10
x/9120'19
Warrant 4: Pedestrian Volume
1: US34 CR91
Intersection Information:
Major Street Minor Street
Street Name
US 34
C R 91
Direction
EBNV B
NB
Number of Lanes
2
1
Approach
Speed
55
55
Warrant 4 Met?
Details:
Pedestrian Four -Hour Volume Warrant met?
Pedestrian Peak Hour Warrant Met?
Motes:
No
No
0 Hours met (4 required)
Speed limit or 85th -percentile speed on the major street > 35 mph, or
intersection lies within an isolated community with population < 10,000
E
Federal 2009 11
Warrant 4, Pedestrian Four -Hour Volume (70% Factor)
300
900
1
Warrart 4 Curve
* Unwarranted
400 SOO 600 70D 800
Major Street - Vehicles Ps& Hour - Total of Both Approaches 'P'H)
E Unwarranted
Warranted
Hour
Major Street
(VPH)
Vehicle Volume
Volume of Pedestrians
Street
Crossing Major
(VPH)
Federal 2009 12
Warrant 4, Pedestrian Four -Hour Volume (70% Factor)
400 600 7DD SO
Marx Street - Vehicles Pe_! Hour - Total of Both Approaches (VPH)
1
a VI/arrant 4 Curve
® Warranted
# Unwarranted
Pedestrian Peak Hour
Hour
Vehicular Volume Pedestrain Volume
Nip
N/A
N/A
Federal 2009 1
Warrant 5: School Crossing
7: US34 CR91
Intersection Information:
Major Street
Name
US 34
Major Direction
EB/WB
Warrant 5 Met? r No
Details:
Time Period Interval for Students Crossing (min)
Number of Students Crossing in Time Period
Number of Adequate Gaps in Time Period
Other Remedial Measures Attempted?
Adjacent Signal on EB approach?
Distance to signal on EB Approach (ft)
Adjacent Signal on W B approach?
Distance to signal on WB Approach (ft)
Will New Signal Restrict Progressive Traffic?
a
0
0
No
No.
INI
Na
Federal 2009 14
Warrant 6: Coordinated Signal System
1: US34 CR91
Intersection Information
Major
Street
Dame
US 34
Major Direction
EINVVB
Warrant 6 Met? No
Details:
Approach
Dir./Name
Acceptable Adjacent Coordinating Adjacent Intersection
Platooning?
Signal? Distance
EB Approach (US 34)
Yes
NIA
WB Approach (US 34)
Yes
No
■
NIA
NB Approach (CFA 91 )
Yes
No j
NIA
Unacceptable Platooning? Distance to Closest Signal
(At least one approach) (Must be N/A or >.- 1000)
No N/A
Federal 2009 15
Warrant 7: Crash Experience
1: US34 CR91
Intersection Information:
Major Street Name
US 34
Major Direction
EB/WB
.
Minor Direction
NB
Warrant 7 Met?
No
Details:
Low Population? Yes
Major Street Speed Limit 65
Major Street 85th -Percentile Speed 65,00
Qualifying Crashes 0
Adequate Alternative Trials? No
Traffic Volume Condition Met? No
Ped Volume Condition Met? No
1 Hours Met (8 Required)
Q Hours Met (8 Required)
Hour
Traffic Volumes
Pedestrian Volumes
Major Street Minor Street
Vehicles Vehicles
56% Standard Met?
A OR B
Northbound Ped Volumes
Condition
A
Condition
B
Peds
> 80?
Peds
> 80?
08:00 to 09:00
804
0
No
No
0
No
0
No
08:15 t0 09:15
603
0
No
No
0
No
0
No
08:30 to 09:30
402
0
No
No
0
No
0
No
08:45 to 09:45
201
0
No
No
0
No
0
No
16:15 t0 17':15
796
0
No
No
0
No
0
No
16:30 to
17:30
597
0
No
No
0
No
0
No
16:45 to 17:45
398
0
No
No
0
No
0
No
17:00 to 18:00
199
0
No
No
0
No
0
No
Federal 2009
16
Warrant 8: Roadway Network
1: US34 CR91
Intersection Information:
Maur
Street
Name
US 34
Major Direction
EB/WB
Minor Direction
NB
Warrant 8 [Viet? (A or B) No
Details:
Growth Rates (per gear)
NB
L 1.36%
T 1.36%
R 1.36%
EB
WB
—L-73-67;
L 1.36%
T 1.36%
T 1.36%
R 1.36% R 1.36%
Condition Ay Total Entering Volume
Existing Peak Hour
Years
Future Peak Hour
Warrant 1 in 5 Years?
Warrant 2 in 5 Years?
Warrant 3 in 5 Years?
940
1.00
063
No
No
Yes
Condition D, Nan -normal Business Day
Existing
Highest Hour
Second Highest Hour
Third Highest Hour
Fourth Highest Hour
Fifth Highest Hour
Yearly Growth Rate
Years
Future
Highest Hour
Second Highest Hour
Third Highest Hour
Fourth Highest Hour
Fifth Highest Hour
0
0
0
0
1.36%
1.00
0
0
0
0
Condition A Met?
No -11
Condition H Met?
No
Federal 2009
17
Warrant 9: Intersection Near a Grade Crossing
1: US34 CR91
Intersection Information:
Major Street
Minor
Street
Street
Name
US 34
cR 91
Direction
ES/ ''S
NB
Number
of Lanes
2
1
Approach
Speed
65
55
Warrant 9 Met?
No
[details:
Note:
No
approach
with a railroad
grade crossing
Minor
-street approach
having a grade
crossing
.
Distance
from the
center
of the track
to
the stop
or yield
line
interpolated
Number of occurences of rail traffic
per day
.
Adjustment
factor
Percentage of
high
-occupancy buses crossing
the
track
°A
Adjustment
factor
Percentage
of
tractor
-trailer
trucks crossing
the
track
4%
Adjustment
factor
The
rail
traffic
arrival
times are uknown,
the highest
traffic
volume
hour of the
day is used
Federal 2009 18
Wa rrant
.Ea
400
300
200
100 —
1 1 t t 1
I 1 i 1 1
I I I I 1
t I I t I
I I i t I
I I I I I
I I I I I
L 1 J J .1
1 1 I I I
t I 1 t t
1 1 1 1 1
1 1 1 1 1
1 1 i 1 1
1 1 1 1 1
I I i 1 i
r 7 1 9 t
1 1 1 1 1
I 1 1 1 I
I I 1 I I
1 1 1 1 1
i I I I I
I I I I I
L 1 J J J
I 1 1 1 1
1 1 1 1 1
1 1 1 1 1
t I 1 t I
1 1 1 1 1
1 1 I 1 1
1 1 1 I i
r ? 1 1 st
I I t I I
t I i I I
I 1 1 1 I
I 1 1 1 I
t I i I I
I I 1 I I
L
L
r
t I
1 I i
I I I
t I
1 I i
1 I t
1 I
J J J
1 I I
t I I
1 I
I I I
1 I i
1 I 1
i I i
i 1
1 I t
I I
1 I 1
1 I 1
I I 1
i I
J J J
1 I 1
1 I
1 I t
t I 1
1 I
1 I t
I I 1
� � 1
1 I 1
t I i
1 I 1
I I 1
1 I i
i I 1
0 100 200 300 40D 500 6i00 700 800 900 1000 11 Do 1200 1300 1400 1500
airs
Warrant Curve
® Warranted
* U n wrarra n ted
/ Unwarranted
Warranted
Hour
Major Street Total of Both Approaches (VPH)
i
Adjusted Volume of Minor Approach Crossing the
Track (VPIH)
_
Federal 2009 19
All -Way Stop Control Warrant : Multiway Stop Applications
1: US34 CR91
Intersection Information:
Major Street Name
Major Direction
Minor Direction
US 34
E B/WB
NB
AWSC Warrant Met?
_It
No
Details:
Condition A Met?
No
n
Condition B Met?
�No
Condition C t?
� No �
0 Hours Met (8 Required)
Qualifying
Crashes
0
Major
Street
85th
-Percentile
Speed
65.00
Major
Street
Speed
Limit
05
Federal 2009 20
Traffic Volumes
Bicycle Volumes
Red Volumes
Condition C
Hour
.
Major
Street
Vehicles
Minor
Street
Vehicles
Northbound
Bicycle
Volumes
Northbound
Bicycle
Major Street
Minor Street
Volumes '
(Total
Volume)
Vehicle
>-
210
Avg(Veh + Ped Delay
+ Bicycle) >-
200
>-
30
Federal 2009 21
Appendix 4
Auxiliary Lane Calculations
According to State Highway Access Code
Intersection of US 34 & C R 91 — Eastbound Right Turn Lane
Access Category = R -A
Posted Speed = 55 mph
Grade (Table 4-7) _ <3%
Projected Turning Vehicles per Peak Hour (2439)
?? veh
Projected Passenger Car Equivalents (PCE) per Peak Hour (2039) = 176 veh
Desirable Full Deceleration Length (Table 4-6) = 800 ft
Storage Length (Table 4-5) = Q ft
Taper Rate (Table 4-6) = 25:1
Lane Width (assumed) = 12 ft
Taper Length = (Taper Rate)*(Lane Width) _ (25)*(12) = 300 ft
Full -Width Turn Lane = (Deceleration Length) + (Storage Length) — (Taper Length)
_ (800) + (Q) — (300) = 500 ft"`
*According to Table 4-5, taper length is included in the desirable full deceleration length for category
"R A" highways (i.e. 500 ft full -width deceleration lane, 300 ft taper). With a relatively high volume and
percentage of heavy vehicles, additional consideration is justified (Section 3.5.4) to separate the taper
from the desirable full deceleration length (i.e. 800 ft full -width deceleration lane, 300 ft taper) if
feasible.
Intersection of US 34 & C R 91 — Westbound Left Turn Lane
Access Category = R -A
Posted Speed = 65 mph
Grade (Table 4-7) _ <3%
Projected Turning Vehicles Per Peak Hour (2039) = 10 Leh
Projected Passenger Car Equivalents (PCE) per Peak Hour (2039) = 27 veh
Desirable Full Deceleration Length (Table 4-6) = 800 ft
Storage Length (Table 4-5, Table 4-8) = 25 ft
Taper Rate (Table 4-6) = 25:1
Lane Width (assumed) = 12 ft
Taper Length = (Taper Rate}"(Lane Width) _ (25)*(12) = 300 ft
Full -Width Turn Lane = (Deceleration Length) + (Storage Length) — (Taper Length)
_ (800) + (25) — (300) = 525 ft
According to State Highway Access Code
Intersection of US 34 & CFA 91 —Westbound Acceleration Lane (four Northbound Left Turns)
Access Category = R -A
Posted Speed = 65 mph
Grade (Table 4-?) _ <3%
Projected Vehicles per Peak Hour (2039)
56 veh
Projected Passenger Car Equivalents (PCE) per Peak Hour (2039) = 129 veh
Desirable Full Acceleration Length {Table 4-6} = 1380 ft
Taper Rate (Table 4-6) = 25:1
Lane Width (assumed) = 12 ft
Taper Length = (Taper Rate)*(Lane Width) _ (25)*(12) = 300 ft
Full -Width Acceleration Lane = (Acceleration length) — {Taper Length}
_ (1380) — (300) = 1080 ft*
Buffer Length = 30►0 ft**
*According to Table 4-5, taper length is included in the desirable full acceleration length for category
"R -A" highways (i.e. 1080 ft full -width acceleration lane, 300 ft taper). With a relatively high volume and
percentage of heavy vehicles, additional consideration is justified (Section 3.5.4) to separate the taper
from the desirable full acceleration length (i.e. 1380 ft full -width acceleration lame, 300 ft taper) if
feasible.
**According to Tables 4-5 and 4-, there is no consideration for divided vs. undivided highways. Since
US 34 is undivided, it is recommended that the taper be followed by a minimum 300 ft long buffer area
such as a painted median, which would serve as an emergency buffer for merging vehicles in the
event that no adequate gap is available at the end of the taper, and thus a potential conflict with
eastbound vehicles.
According to 2012 Weld County Engineering and Construction Guidelines (Updated July 2017)
Intersection of CFA 91 & Facility Entrance - Southbound Left Turn Lane
Access Category = Gravel Local (following guidelines for collector/arterial roadways)
Posted Speed (assured) _ 55 mph
Projected Turning Vehicles Per Peak. Hour (2030) _ 77 veh
Projected Passenger Car Equivalents (PE) per Peak. Hour (2030) = 102 veh
Desirable Full Deceleration Length (Table -10) = 000 ft
Storage Length (Table 6-11) = 100 ft
Taper Rate (Table 0-10) = 18.5:1
Lane width (assured) = 12 ft
Taper Length = (Taper Rate)*(Lane Width) _ (18.5)*{12} = 220 ft
Full -Width Turn Lane = (Deceleration Length) + (Storage Length) — (Taper Length)
_ (600) + (100)— (220) _ Aso ft
Appendix 5
Intersection LOS Report
HCM 2010 TWSC Alternative 1 No Changes
1: CR 91 & US 34
7/10/2019
Intersection
Int Delay, 5Aveh 0.9
Movement
EBT EBR
WB L WBT
NBL
NBR
Vol, vehth
Conflicting Pods, #/hr
Sign Control
RT Channelized
Storage Length
Veh in Median Storage, #
Grade, ado
Peak Hour Factor
Heavy Vehicles, %
Mvmt Flog
239 174
0 0
Free Free
- None
0
0
92
0
2+69
Imt
92
0
169
27 236
0 0
Free F re e
- None
165 -
0
6
92 92
6 0
29 313
31
0
Stop
0
1
0
92
0
34
6
0
Stop
None
92
0
7
Major/Minor
Majorl
Major2
Minorl
Conflicting Flow All
Stage 1
Stage 2
Critical Hdwy
Critical Hdwy Stg 1
Critical Hdwy Stg 2
Follow-up Hdwy
Pot Cap -1 Maneuver
Stage 1
Stage 2
Platoon blocked, %
Mov Cap -1 Maneuver
Mov Cap -2 Maneuver
Stage 1
Stage 2
0 0
449 0
4.1
2.2
1122
ImP
1122
726
354
372
6.4
54
5.4
3.5
394
715
702
364
494
715
664
354
6.2
Imt
3.3
694
694
Approach
EB
WB
NB
HCM Control Delay, s
HCM LOS
0
0.7
12.6
B
Minor Lane/Major Mvmt
NBLn1 EBT EBR WBL WBT
Capacity (vett) 516
HCM Lane WC Ratio 0.076
HCM Control Delay (s) 12.5
HCM Lane LOS B
HCM 95th %tile {ve'h} 0.3
- 1122
- 6.926
- 8.3
A
0.1
US34_CR91 _PCE_AIt1_2o19_AMpeak
Synchro 8 Report
Page 1
HCM 2010 TWSC Alternative 1 No Changes
1: CR 91 & US 34
7/10/2019
Intersection
Int Delay, 5Aveh 2.8
Movement
EBT EBR
WB L WBT
NBL
NBR
Vol, vehth
Conflicting Pods, #/hr
Sign Control
RT Channelized
Storage Length
Veh in Median Storage, #
Grade, ado
Peak Hour Factor
Heavy Vehicles, %
Mvmt Flog
374 43
0 0
Free Free
- None
0
0
92
0
407
Imt
92
0
47
6 298
0 o
Free F re e
- None
185 -
0
0
92 92
0 o
7 324
129
0
Stop
0
1
0
92
0
140
23
0
Stop
None
MEP
92
0
25
Major/Minor
Majorl
Major2
Minorl
Conflicting Flow All
Stage 1
Stage 2
Critical Hdwy
Critical Hdwy Stg 1
Critical Hdwy Stg 2
Follow-up Hdwy
Pot Cap -1 Maneuver
Stage 1
Stage 2
Platoon blocked, %
Mov Cap -1 Maneuver
Mov Cap -2 Maneuver
Stage 1
Stage 2
0 0
453 0
4.1
2.2
1118
1118
IMP
MIL
767
430
337
6A
5.4
5.4
3.5
373
660
723
371
484
660
723
430
6.2
Imt
3.3
629
629
Approach
EB
WB
NB
HCM Control Delay, s
HCM LOS
0
0.2
15.7
C
Minor Lane/Major Mvmt
NBLn1 EBT EBR WBL WBT
Capacity (vett)
HCM Lane WC Ratio
HCM Control Delay (s)
HCM Lane LOS
HCM 95th %tile {ve'h}
501
9.33
15.7
C
1.4
WIN
- 1113
- 0.006
- 8.2
_ A
g
US34_CR91 _PCE_AIt1_2o19_PMpeak
Synchro 8 Report
Page 2
HCM 2010 TWSC Alternative 1 No Changes
1: CR 91 & US 34
7/10/2019
Intersection
Int Delay, 5Aveh
0.6
Movement
EBT EBR
WB L WBT
NBL
NBR
Vol, vehth
313 176
27 377
31
6
Conflicting Pods, #/hr
0 0
0 0
0
0
Sign Control
Free Free
Free F re e
Stop
Stop
RT Channelized
- None
- None
None
Storage Length
165
0
Veh in Median Storage, #
0
0
1
Grade, ado
0
0
0
Peak Hour Factor
92 92
92 92
92
92
Heavy Vehicles, %
0 0
0 0
0
0
Mvmt Flog
340 191
29 410
34
7
Major/Minor
Majorl
Major2
Minorl
Conflicting Flow All
0 0
532 0
904
436
Stage 1
436
Stage 2
466
Critical Hdwy
4.1
6.4
6.2
Critical Hdwy Stg 1
5.4
Critical Hdwy Stg 2
5.4
Follow-up Hdwy
2.2
.5
3.3
Pot Cap -1 Maneuver
1046
310
625
Stage 1
656
Stage 2
634
Platoon blocked, %
Mov Cap -1 Maneuver
1046
301
625
Mov Cap -2 Maneuver
427
Stage 1
656
Stage 2
016
Approach
EB
WB
NB
HCM Control Delay, s
0
0.6
13.6
HCM LOS
B
Minor Lane/Major Mvmt
NBLn1 EBT EBR WBL WBT
Capacity (veh/h) 450
HCM Lane WC Ratio 0.039
HCM Control Delay (s) 13.$
NIP
- 1046
- 0.028
- 8.5
HCM Lane LOS
B�
R
A
EN
HCM 95th %tile {ve'h} o.
- 0.1
Nib
US34_CR91 _PCE_AIt1_2039_AMpeak
Synchro 8 Report
Page 3
HCM 2010 TWSC Alternative 1 No Changes
1: CR 91 & US 34
710/2019
Intersection
Int Delay, 5Aveh 2.7
Movement
EBT EBR
WB L WBT
NBL
NBR
Vol, vehth
Conflicting Pods, #/hr
Sign Control
RT Channelized
Storage Length
Veh in Median Storage, #
Grade, ado
Peak Hour Factor
Heavy Vehicles, %
Mvmt Flog
490 44
0 0
Free Free
- None
0
0
92
0
533
92
0
43
6 390
0 o
Free F re e
- None
185 -
0
0
92 92
0 0
7 424
129
0
Stop
0
1
0
92
0
140
23
0
Stop
None
MEP
92
0
25
Major/Minor
Majorl
Major2
Minorl
Conflicting Flow All
Stage 1
Stage 2
Critical Hdwy
Critical Hdwy Stg 1
Critical Hdwy Stg 2
Follow-up Hdwy
Pot Cap -1 Maneuver
Stage 1
Stage 2
Platoon blocked, %
Mov Cap -1 Maneuver
Mov Cap -2 Maneuver
Stage 1
Stage 2
0 0
580 0
4.1
2.2
1004
1004
994
557
437
6.4
5.4
5.4
3.5
274
573
655
272
403
573
650
557
6.2
3.3
534
534
Approach
EB
WB
NB
HCM Control Delay, s
HCM LOS
0
0.1
19.1
C
Minor Lane/Major Mvmt
NBLn1 EBT EBR WBL WBT
Capacity (veh/h)
HCM Lane WC Ratio
HCM Control Delay (s)
HCM Lane LOS
HCM 95th %tile {ve'h}
419
0.394
19.1
C
1.8
- 1004
- 0.006
- 8.6
_ A
g
US34_CR91 _PCE_AIt1_2o39_PMpeak
Synchro 8 Report
Page 4
HCM 2010 TWSC Alternative - Turn Large Improvements
1: CR 91 & US 34
7/100019
Intersection
Int Delay, 5Aveh 0.8
Movement
EBT EBR
WB L WBT
NBL
NBR
Vol, vehth
Conflicting Peels, #/hr
Sign Control
RT Channelized
Storage Length
Veh in Median Storage, #
Grade, ado
Peak Hour Factor
Heavy Vehicles, %
Mvmt Flog
289 174
0 0
Free Free
- None
- 800
0
0
92 92
0 0
2+69 189
27 288
0 0
Free F re e
- None
525 -
0
0
92 92
0 o
29 818
31
0
Stop
0
2
0
92
0
84
8
0
Stop
None
92
0
7
Major/Minor
Majorl
Major2
Minorl
Conflicting Flow All
Stage 1
Stage 2
Critical Hdwy
Critical Hdwy Stg 1
Critical Hdwy Stg 2
Follow-up Hdwy
Pot Cap -1 Maneuver
Stage 1
Stage 2
Platoon blocked, %
Mov Cap -1 Maneuver
Mov Cap -2 Maneuver
Stage 1
Stage 2
0 0
260 0
4.1
2.2
1816
Mot
P OO
882
280
872
6A
5.
5.4
8.5
448
788
702
488
898
788
887
280
6.2
8.8
784
784
Approach
EB
WB
NB
HCM Control Delay, s
HCM LOS
0
0.7
11.2
B
Minor Lane/Major Mvmt
NBLn1 EBT EBR WBL WBT
Capacity (vett)
HCM Lane WC Ratio
HCM Control Delay (s)
HCM Lane LOS
HCM 95th %tile {ve'h}
822
0.065
11.2
B
0.2
- 1316
- 9.922
- 7.8
_ A
- 0.1
US84_CR91 _PCE_AIt2_2o19_AMpeak
Synchro 8 Report
Page 5
HCM 2010 TWSC Alternative - Turn Large Improvements
1: CR 91 & US 34
7/10O019
Intersection
Int Delay, 5Aveh 2.5
Movement
EBT EBR
WB L WBT
NBL
NBR
Vol, vehth
Conflicting Peels, #/hr
Sign Control
RT Channelized
Storage Length
Veh in Median Storage, #
Grade, ado
Peak Hour Factor
Heavy Vehicles, %
Mvmt Flog
374 43
0 0
Free Free
- None
- 500
0
0
92 92
0 0
407 47
6 298
0 o
Free F re e
- None
525 -
0
0
92 92
0 o
7 324
129
0
Stop
0
2
0
92
0
140
23
0
Stop
None
MEP
92
0
25
Major/Minor
Majorl
Major2
Minorl
Conflicting Flow All
Stage 1
Stage 2
Critical Hdwy
Critical Hdwy Stg 1
Critical Hdwy Stg 2
Follow-up Hdwy
Pot Cap -1 Maneuver
Stage 1
Stage 2
Platoon blocked, %
Mov Cap -1 Maneuver
Mov Cap -2 Maneuver
Stage 1
Stage 2
0 0
407 o
4.1
2.2
1163
1163
744
407
337
6A
5.
5.4
3.5
385
676
723
383
563
676
724
407
6.2
3.3
648
648
Approach
EB
WB
NB
HCM Control Delay, s
HCM LOS
0
0.2
13.3
B
Minor Lane/Major Mvmt
NBLn1 EBT EBR WBL WBT
Capacity (vett) 574
HCM Lane WC Ratio 0.238
HCM Control Delay (s) 13.$
HCM Lane LOS B
HCM 95th %tile {ve'h} 1.2
1163
- 0.906
- 8.1
_ A
g
US34_CR91 _P CE_AIt2_2o 19_PMpeak
Synchro 8 Report
Page 6
HCM 2010 TWSC Alternative - Turn Large Improvements
1: CR 91 & US 34
7/10O019
Intersection
Int Delay, 5Aveh 0.7
Movement
EBT EBR
WB L WBT
NBL
NBR
Vol, vehth
Conflicting Peels, #/hr
Sign Control
RT Channelized
Storage Length
Veh in Median Storage, #
Grade, ado
Peak Hour Factor
Heavy Vehicles, %
Mvmt Flog
313 176
0 0
Free Free
- None
- 500
0
0
92 92
0 0
340 191
27 377
0 0
Free F re e
- None
525 -
0,
0
92 92
0 0
29 410
31
0
Stop
0
2
0
92
0
34
6
0
Stop
None
92
0
Major/Minor
Majorl
Major2
Minorl
Conflicting Flow All
Stage 1
Stage 2
Critical Hdwy
Critical Hdwy Stg 1
Critical Hdwy Stg 2
Follow-up Hdwy
Pot Cap -1 Maneuver
Stage 1
Stage 2
Platoon blocked, %
Mov Cap -1 Maneuver
Mov Cap -2 Maneuver
Stage 1
Stage 2
0 0
340 0
4.1
2.2
1230
ImP
1230
Inn
inn
IMP
393
340
463
6.4
5.4
5.4
3.5
353
725
634
345
527
725
019
340
6.2
3.3
707
707
Inn
Approach
EB
WB
NB
HCM Control Delay, s
HCM LOS
0
0.5
12.1
B
Minor Lane/Major Mvmt
NBLn1 EBT EBR WBL WBT
Capacity (vett) 550
HCM Lane WC Ratio 0.973
HCM Control Delay (s) 12.1
HCM Lane LOS B
HCM 95th %tile {ve'h} 0.2
- 1230
- 0.024
8
A
- 0.1
US34_CR91 _P CE_AIt2_2039_AMpeak
Synchro 8 Report
Page 7
HCM 2010 TWSC Alternative - Turn Large Improvements
1: CR 91 & US 34
7/10/2019
Intersection
Int Delay, 5Aveh 2.3
Movement
EBT EBR
WB L WBT
NBL
NBR
Vol, vehth
Conflicting Pods, #/hr
Sign Control
RT Channelized
Storage Length
Veh in Median Storage, #
Grade, ado
Peak Hour Factor
Heavy Vehicles, %
Mvmt Flog
490 44
0 0
Free Free
- None
- 500
0
0
92 92
0 0
533 43
6 390
0 o
Free F re e
- None
525 -
0
0
92 92
0 0
7 424
129
0
Stop
0
2
0
92
0
140
23
0
Stop
None
MEP
92
0
25
Major/Minor
Majorl
Major2
Minorl
Conflicting Flow All
Stage 1
Stage 2
Critical Hdwy
Critical Hdwy Stg 1
Critical Hdwy Stg 2
Follow-up Hdwy
Pot Cap -1 Maneuver
Stage 1
Stage 2
Platoon blocked, %
Mov Cap -1 Maneuver
Mov Cap -2 Maneuver
Stage 1
Stage 2
0 0
533 0
IMP
4.1
2.2
1045
ImP
1045
IMP
970
533
437
6A
5.
5.4
3.5
253
593
655
281
450
593
651
533
6.2
3.3
551
551
Approach
EB
WB
NB
HCM Control Delay, s
HCM LOS
0
0.1
16
C
Minor Lane/Major Mvmt
NBLn1 EBT EBR WBL WBT
Capacity (vett)
HCM Lane WC Ratio
HCM Control Delay (s)
HCM Lane LOS
HCM 95th %tile {ve'h}
490
0.337
16
C
1.5
- 1045
- 0.005
- 8.5
A
0
Nib
EN
US34_CR91 _P CE_AIt2_2o39_PMpeak
Synchro 8 Report
Page 8
HCM 2010 TWSC Alternative - Turn Lane Improvements
: CR 91 & Mine Entrance
7/10O019
Intersection
Int Delay, 5Aveh
7.2
Movement
WBL WBR
NBT NBR
SBL SBT
Vol, vehth
9
36
0 25
192 0
Conflicting Peels, #/hr
0
0
0 o
0 0
Sign Control
Stop
Stop
Free Free
Free Free
RT Channelized
None
None
- None
Storage Length
0
P PM
480
Veh in Median Storage, # o
0
0
Grade, ado
0
0
0
Peak Hour Factor
90
90
90 90
90 90
Heavy Vehicles, %
0
0
0 0
0 0
Mvmt Flog
10
40
0 28
213 o
Major/Minor
Minorl
Majorl
Ma jor2
Conflicting Flow All
441
14
0 0
28 o
Stage 1
14
Stage 2
427
Critical Hdwy
6.4
6.2
4.1
Critical Hdwy Stg 1
5.4
Critical Hdwy Stg 2
5.4
Follow-up Hdwy
3.5
3.3
2.2
Pot Cap -1 Maneuver
977
1072
1 599
Stage 1
1{14
Stage 2
662
N MI
Platoon blocked, %
Mov Cap -1 Maneuver
500
1072
1 599
Mov Cap -2 Maneuver
Soo
Stage 1
1014
Stage 2
574
Approach
WB
NB
SB
HCM Control Delay, s
9.4
0
7.6
HCM LOS
A
Minor Lane/Major Mvmt
NBT NBRWBLn1 SBL SBT
Capacity (veh/h)
- 872 1599
HCM Lane WC Ratio
- 0.057 0.133
HCM Control Delay (s)
- 9.4 7.6
HCM Lane LOS
A A
HCM 95th %tile {ve'h}
- 0.2 0.5
US34_CR91 _PCE_AIt2_2o19_AMpeak
Synchro 8 Report
Page 9
HCM 2010 TWSC
: CR 91 & Mine Entrance
Alternative 2 - Turn Lane Improvements
7/10O019
Intersection
Int Delay, 5Aveh
8.7
Movement
WBL WBR
NBT NBR
SBL SBT
Vol, vehth
Conflicting Peels, #/hr
Sign Control
RT Channelized
Storage Length
Veh in Median Storage, #
Grade, ado
Peak Hour Factor
Heavy Vehicles, %
Mvmt Flog
39
0
Stop
0
0
0
90
43
151
0
Stop
None
90
0
168
o 7
0 o
Free Free
None
0
0
90
0
0
90
0
3
46 0
0 0
Free Free
- None
480 -
g
g
90 90
0 0
51 0
Major/Minor
Minorl
Majorl
Ma jor2
Conflicting Flow All
Stage 1
Stage 2
Critical Hdwy
Critical Hdwy Stg 1
Critical Hdwy Stg 2
Follow-up Hdwy
Pot Cap -1 Maneuver
Stage 1
Stage 2
Platoon blocked, %
Mov Cap -1 Maneuver
Mov Cap -2 Maneuver
Stage 1
Stage 2
106
4
102
6.4
5.4
5.4
3.5 3.3
897 1035
1024
927
4
6.2
869 1085
869
1024
898
0 0
8 0
4.1
PO
2.2
1625
1 625
Approach
WB
NB
SB
HCM Control Delay, s
HCM LOS
9.4
A
0
7.3
Minor Lane/Major Mvmt
NBT NBRWBLn1 SBL SBT
Capacity (veh/h)
HCM Lane WC Ratio
HCM Control Delay (s)
HCM Lane LOS
HCM 95th %tile {ve'h}
- 1032 1626
- 9.205 9.631
- 9.4 7.3
- A A
- 0.8 0.1
US34_CR91 _PCE_AIt2_2o19_PMpeak
Synchro 3 Report
Page 10
HCM 2010 TWSC Alternative - Turn Lane Improvements
: CR 91 & Mine Entrance
7/10O019
Intersection
Int Delay, 5Aveh 7.2
Movement
WBL WBR
NBT NBR
SBL SBT
Vol, vehth
9
36
0 25
192 0
Conflicting Peels, #/hr
0
0
0 o
0 0
Sign Control
Stop
Stop
Free Free
Free Free
RT Channelized
None
None
- None
Storage Length
0
P PM
480
Veh in Median Storage, # o
0
0
Grade, ado
0
0
0
Peak Hour Factor
90
90
90 90
90 90
Heavy Vehicles, %
0
0
0 0
0 0
Mvmt Flog
10
40
0 28
213 0
Major/Minor
Minorl
Majorl
Ma jor2
Conflicting Flow All
441
14
0 0
23 0
Stage 1
14
Stage 2
427
Critical Hdwy
6.4
6.2
4.1
Critical Hdwy Stg 1
5.4
Critical Hdwy Stg 2
5.4
Follow-up Hdwy
3.5
3.3
2.2
Pot Cap -1 Maneuver
977
1072
1 599
Stage 1
1{14
Stage 2
662
N MI
Platoon blocked, %
Mov Cap -1 Maneuver
500
1072
1 599
Mov Cap -2 Maneuver
Soo
Stage 1
1014
Stage 2
574
Approach
WB
NB
SB
HCM Control Delay, s
9.4
0
7.6
HCM LOS
A
Minor Lane/Major Mvmt NBT NBRWBLn1 SBL SBT
Capacity (veh/h)
- 872 1599
HCM Lane WC Ratio
- 0.057 0.133
HCM Control Delay (s)
- 9.4 7.6
HCM Lane LOS
A A
HCM 95th %tile {ve'h}
- 0.2 0.5
US34_CR91 _P CE_AIt2_2o39_AMpeak
Synchro 8 Report
Page 11
HCM 2010 TWSC
: CR 91 & Mine Entrance
Alternative 2 - Turn Lane Improvements
7/10O019
Intersection
Int Delay, 5Aveh
8.7
Movement
WBL WBR
NBT NBR
SBL SBT
Vol, vehth
Conflicting Peels, #/hr
Sign Control
RT Channelized
Storage Length
Veh in Median Storage, #
Grade, ado
Peak Hour Factor
Heavy Vehicles, %
Mvmt Flog
39
0
Stop
0
0
0
90
43
151
0
Stop
None
90
0
168
o 7
0 o
Free Free
None
0
0
90
0
0
90
0
3
46 0
0 0
Free Free
- None
480 -
g
g
90 90
0 0
51 0
Major/Minor
Minorl
Majorl
Ma jor2
Conflicting Flow All
Stage 1
Stage 2
Critical Hdwy
Critical Hdwy Stg 1
Critical Hdwy Stg 2
Follow-up Hdwy
Pot Cap -1 Maneuver
Stage 1
Stage 2
Platoon blocked, %
Mov Cap -1 Maneuver
Mov Cap -2 Maneuver
Stage 1
Stage 2
106
4
102
6.4
5.4
5.4
3.5 3.3
897 1035
1024
927
4
6.2
869 1085
869
1024
898
0 0
8 0
4.1
PO
2.2
1625
1 625
Approach
WB
NB
SB
HCM Control Delay, s
HCM LOS
9.4
A
0
7.3
Minor Lane/Major Mvmt
NBT NBRWBLn1 SBL SBT
Capacity (veh/h)
HCM Lane WC Ratio
HCM Control Delay (s)
HCM Lane LOS
HCM 95th %tile {ve'h}
- 1032 1626
- 9.205 9.631
- 9.4 7.3
- A A
- 0.8 0.1
US34_CR91 _P CE_AIt2_2o39_PMpeak
Synchro 3 Report
Page 12
Appendix
Intersection sight. Distance
According to A Policy on Geometric Design of Highways and Streets (Green Book) 2011, the intersection
sight distance along the major road for vehicles turning from miner roadway from a stop condition ease
B1 & B2) is determined by the formula (equation 9-1):
ISD = 1.470/majorlit
9I
Where ISD = intersection sight distance (ft)
Vmajor = design speed of major read (mph)
tg = time gap for minor road vehicle to enter the major read (seconds)
Note: Vmajor may be higher than posted speed limit for conservative calculations
Intersection of US 34 & CR 91 (Case B1 & B2)
US 34 is the -lane major road, and CR 91 is the minor road. For the purpose of this analysis, Vmajor is
assumed to be 65 mph at the intersection of US 34 & CR 91, and this is the posted speed limit. Heavy
vehicles will be used regularly for product delivery from the mine, so the combination truck is chosen as
the design vehicle for time gap. For these calculations, it is assumed that the major road grade is less
than 3%.
A time gap of 12.5 seconds (11.5 + 0.3 + 0.7) was chosen for left turns where 0.3 is for crossing a 4 ft
median, and 10.5 seconds was chosen for right turns according to Tables 9-5 and 9-7. These are the
recommended time gaps for combination trucks on a multilane road.
ai for right turns = 18.0 + 12.0 (EB right turn lane drop) + 6.0 (half EB lane) = 36.0'
a2 for left turns = 18.0 + 12.0 (EB right turn lane) + 12.0 (EB through lane) + 4.0 (median) + 6.0 (half WB
accel lane) = 52.0
Dote: The calculation above for ai and a2 are standard practice, but the appropriate measurement
depends on the placement of any marked stop line that may be present.
Based on the variables described above, the sight distance required, ISD, (rounded up to nearest 5 ft) is
1195 ft for left turns and 1005 ft* for right turns from CR 91. Web -based street -view observations
indicated that sight distance for would be free of obstructions for both directions, but ISD should be
verified during design of the project.
*According to State Highway Access Code Tables 4-2 and 4-3, the intersection sight distance minimum
for entering vehicles with 65 mph posted speed limit is 1105 ft on a two lane roadway.
Intersection of CIS 91 & Facility Entrance
According to Weld County Engineering and Construction Guidelines, the required intersection sight
distance along the major road for vehicles turning from minor roadway from a stop condition shall be 725
ft for bath left turns and right turns (Table 5-8). CR 91 is the major road, and the facility approach is the
minor road. For the purpose of this analysis, the crossroad pasted speed limit is assumed to be 55 mph.
All sight distance triangles are based on an approach offset of 15 ft from the edge of travel lane (Figure 5-
3).
BLACK MOUNTAIN
ATTACHMENT P;
WASTE HANDLING PLAN
Black I'vlountain Sand weld LLC (Black Mountain) will be implementing the following Waste Handling
Plan for the Lost Creep Mine (Facility).
General wastes will be generated by the office, maintenance shop/warehouse, processing facility lab,
and check in/check out booth and will be stored in a standard dumpster located between the office and
maintenance shop/warehouse buildings. The office and maintenance shop/warehouse buildings will be
installed with the initial facility construction.
The waste generated will be trash from the operation of the office, maintenance shopwarehouse,
processing facility lab, and check inicheck out booth and the employees of the urine (i.e. lunch
containers, beverage containers, etc.). The volume will be stored in a one cubic yard dumpster and
collected bi-weekly by the waste handler.
The waste handler and facility where waste will be disposed is as follows:
Waste Handler: Waste Management
Facility Name: North Weld Landfill Management Facility (Disposal)
Address: 40000 weld County Road 25
Ault, Colorado 80610
Phone Number: (866) 482-6319
A minor quantity of household hazardous waste will be generated by operations at the Facility. These
materials include but are not limited to: antifreeze, auto batteries, brake fluid, aerosols ;and cleaning
fluids, diesel fuel, lubricants and solvents, used motor oil, used oil filters, transmission fluids; etc. The
majority of these household hazardous wastes will be generated at the maintenance shop,/warehouse
during fleet and equipment maintenance activities. Some waste will also be generated at the office and
processing facility lab in the form of cleaners, disinfectants, etc. during general cleaning activities.
All household hazardous waste will be collected and stored separately from general waste until it can be
properly disposed of in accordance with the weld County Household Hazardous Waste Program. It is
anticipated that quantities generated as a part of the mining operations will classify the Facility as a Very
Small Quantity Generator (VSCaG) under the Colorado Hazardous Waste Regulations, 6 CCR 1007-3, Part
260, Section 260.10, as it will generate similar materials and quantities as an auto repair shop. An EPA
identification number will be obtained from the Colorado Department of Public Health and Environment
(CDPHE) Hazardous IVlaterials and Waste Management Division prior to disposing of any household
hazardous wastes.
The waste handler and facility where household hazardous waste will be disposed is as follows:
Waste Handler: Weld County
Facility Name: ;weld County Household Hazardous Waste Collection Facility
Address: 1311 N. 17th Aire
Greeley, Colorado 80631
Phone Number: (978) 408-2217
If it is determined that the Facility cannot be classified as a VSQG, Black Mountain will work with weld
County and the CDPHE Hazardous Materials and Waste Management Division to determine the closest
appropriate location for disposing of its household hazardous waste.
Wage Weld County:
Use by Special Review for Mining Operations
tit% BLACK MOUNTAIN
ATTACHMENT P;
WASTE HANDLING PLAN
it is not anticipated that the Facility will generate hazardous waste other than household hazardous
waste. No hazardous materials will be used in the processing plant during the gashing and sorting of
material. No hazardous waste or materials needing to be disposed of through the use of a hazardous
waste program will be ruined or are expected to be encountered during the operation. Further, the
processing plant does not physically alter the run of mine ore except to perform size separation. No new
mineral surface areas will be exposed that could produce hazardous materials.
One 50,000 -gallon above -ground diesel fuel tank with secondary containment will be installed at the
fueling station during the initial construction phase. A maximum of two additional 50,000 -gallon above-
ground fuel tanks may be installed later during the life -of -mine operations, as needed, for fleet
management (see Attachment F, Facility Map, for location). Additional smaller diesel fuel storage tanks
will be located at a fuel and lobe bay inside the maintenance shop/warehouse building for small
refueling and maintenance tasks related to fleet maintenance activities. All fuel storage tanks will have
secondary containment. A Spill Prevention Control and Countermeasures (SPCC) plan will be in place for
all fuel storage activities. The SPCC plan will be available at the site at all times. The large fuel storage
tank(s) will be permitted through the state of Colorado Department of Labor and Employment Division
of Oil and Public Safety, as applicable, and will be constructed and installed to conform to all applicable
sections of the National Fire Protection Association (NFPA) fire code. The tank(s) will also be permitted
with the Southeast Weld Fire Protection District, as required.
The maintenance shop/warehouse building will also store lubricants, cleaning fluids, brake and
transmission fluids, used oil, and other chemicals and items related to fleet maintenance activities. Oily
rags, filters, and other solid household hazardous wastes will be stored at the maintenance/warehouse
facility inside a secondary containment to prevent leafs until the items can be properly disposed. The
maintenance shop floor will be paved and will be designed to capture any fluid spills in a closed drain
system for easy cleanup. The drain system will not be connected to any exterior water drain or sewer
system and will not d'isc'harge. Additionally, spill bits will be kept on site to assist in spill cleanup and the
storage location of spill kits will be noted in the onsite SPCC plan.
The Facility's onsite wash bay, which will be located at the maintenance shop/warehouse building, will
include a water tank to wash fleet trucks and equipment prior to maintenance activities. This wash bay
will not use any soaps or detergents and will only use fresh water from the water pipeline. See
Attachment F, water Supply Narrative and Maps, for more details on the water pipeline.
21
Weld County:
Use by special Review for Mining Operations
BLACK. MOUNTAIN
Attachment la
Dust Abatement Plan
Weld County:
Use by Special Review for Mining Operations
BLACK MOUNTAIN
ATTACHMENT Q:
Dun ABATEMENT PLAN
Black Mountain Sand Weld LLC (Black Mountain) will provide dust abatement for the Lost Creek Mine
(Facility), a 2.4 million ton per year (Mtpy) industrial proppant sand production facility in 'Weld County,
Colorado, as required by the Colorado Air Quality Control Act and as outlined in the Weld County Code
Chapter 8. The Facility will consist of an open pit mining operation and sand wash processing plant and
associated loadout facility, water trucks will be used to treat all active on -site areas, including haul roads,
pit areas, and the sand wash processing plant as needed throughout the life -of -marine in order to suppress
gust.
Construction
Curing the construction phase, which includes the installation of all sand wash processing plant facilities,
access road installation, and installation of all utilities necessary for processing plant operations, the site
will be wetted as necessary for dust mitigation. The access road leading to the processing plan, parking lot,
and truck loadout areas will be paved to reduce dust emissions.
Operation
Yearly mining blocks will be developed over the life of the operation. Mining of one yearly block at a time is
planned, with concurrent reclamation. The topsoil stockpiles for each phase will be seeded to reduce
fugitive dust emissions. As it is used for reclamation purposes, disturbed areas of the stockpile will be
wetted with water trucks as necessary to control dust. Vehicle speeds on all paged roads within the project
will be reduced on -site and posted at 10 mph at the entrance access road from weld County Road (WCR)
91. This will apply to all paved roads and the processing plant area of the project.
Water tucks will be used to control dust near the processing plant and in pit areas. The speed limit on the
haul roads and in -pit areas will be posted at 25 mph. Material from the pit has some residual moisture.
Additional wetting will be done as needed.
Haul trucks will transport all sand reserves to the sand mash processing plant where they will be stored in a
temporary backfill stockpile before being loaded by front-end loaders onto conveyors to the processing
plant. This maximum 45,000 -ton stockpile will be wetted as needed to reduce dust emissions. The majority
of the on -site processing will be in an enclosed facility. Once inside the facility, the material will go through
an initial wet screening which will remove large material and transport it to the backfill stockpile. Curing
normal operations where backfilling occurs concurrently with nine operations, a maximum of 10,000 tons
of backfill material will be stored in this temporary backfill stockpile at the plant before being transferred
back to the pit for backfilling operations. It is not anticipated that this temporary backfill stockpile will
require dust control; the material contained in the backfill stockpile will contain residual moisture of at
least 10%. However, if it becomes necessary, the backfill stockpile will be wetted using the on -site water
trucks to reduce dust emissions.
A larger temporary backfill stockpile will be used to store material during initial operations before
concurrent reclamation can occur. The material will ultimately be backfilled into the pit. This stockpile will
be covered with topsoil and seeded to assist in dust control* As it is used for reclamation purposes,
disturbed areas of the initial backfill stockpile will be wetted with mater trucks as necessary to control dust.
Once inside the plant, the material will be transferred through the process building, into a large wet
storage stockpile for drying, and back to the process building for final drying and sorting. There are two
exterior transfer points for this process. At the first transfer, the material will contain at least 16% moisture
Wage Weld County:
Use by Special Review for Mining operations
BLACK MOUNTAIN
ATTACHMENT Q:
Dun ABATEMENT PLAN
and at the second at bast 6% moisture. It is not anticipated that either of these transfer points will create
much dust duce to the high moisture level in the material being transferred.
Once the material is dried, enclosed conveyors will transfer the material from the plant to the sibs for
storage. The conveyors will deposit the material into buckets that will feed the material either into the first
silo or onto other conveyors to feed the additional silos. All the conveyors feeding the silos will be enclosed
for dust control. Once the material is fed into the silos, bin vents at the top of the silos create negative
pressure, pulling the material and any associated dust from the conveyor into the silos.
Can a daily basis, all haul roads, processing areas, and stockpiles will be inspected to determine if wetting of
the surfaces are needed. If the reads and stockpiles are dry where dust could be generated, they will be
vetted using a water truck. If, at any tirne during the day, the operations begin to generate dust that is
leaving the site, Black Mountain will have the water tuck on stand-by such that the area can be wetted as
soon as possible.
Reclamation
Water trucks will wet backfilling, regrading, and contouring operations at the site as needed to reduce dust
emissions. Once contoured, the area will be covered with topsoil and seeded as part of the concurrent
reclamation. As necessary, the area will continue to be monitored and vetted to assist with dust control
until revegetation occurs.
2I Weld County:
Use by Special Review for Mining Operations
From: JC York <jcyork@j-tconsuitingocom>
Sent: Tuesday, January 28, 202012:D9 PIVI
To: Kim Ogle <kogle@weldgovcom>
Cc: Chris Leone <thrisleone@j2contracting.com>
Subject: RE: DPG Pit USR 19-0071- Neighborhood Meeting Letter Invitations and Certified Mail Receipts
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.
Kim —
Attached is the list of attendees at the meeting last night. Calven Goza, Catherine Rodifer (James
IVlathews Grandmother), Jaynes Mathews, Robert Mitani {his wife also attended but did not sign in)
attended the meeting that were neighbors and we also sent notices to these folks. The rest of the folks
are either DPP owners, J-2 Contracting, J&T Consulting and our consultant team.
We also did a power point presentation to discuss and show what areas will be mined and reclaimed,
traffic patterns and haul route, ground water modeling and monitor well locations, dust control and
mitigation, noise study, and where we would have a couple of downcast lights in addition to the existing
yard light at the existing buildings near the center of the property. I can send that over to you as well as
it will be the same presentation for the Planning Commission Hearing. Let me know if you errant me to e-
mail or bring a thumb drive by later this week.
Regards,
J.C.
.J. . York, P.E.
J &T Consulting, Inc.
315 Denver Avenue, Suite D
Fort Lupton, Co 80021
Office: (30 3) 857-6222
Mobile: (970) 222-9530
FAX: (303) 857-6224
From: Lauren Light
To: Kira Coff
Cc: Brittany Schamaun; Chris Cathman
Subject: RE: Black Mountain Lost Creek USR Application Environmental Health Response to Comments
Date: Wednesday, July 31, 2019 11:24:58 AM
Bob was ok with the water so EH is good to go.
Lauren Light, M.B.B.
Program Manager/Environmental Planner, Environmental Health Services
Weld County Department of Public Health & Environment
1555 N. 17th Ave.
Greeley, Co 8058'1
Ilight@weldgov.com
970-400-221'1 (office)
Iota. trill, ri
P H A B
Fagg.
0.•
1)1. 411.0030
Confidentiality Notice: This electronic transmission and any attached documents or other writings
are intended only for the person or entity to which it is addressed and may contain information that
is privileged, confidential or otherwise protected from disclosure. If you have received this
communication in error, please immediately notify sender by return e-mail and destroy the
communication. Any disclosure, copying, distribution or the taking of any action concerning the
contents of this communication or any attachments by anyone other than the named recipient is
strictly prohibited.
From: Kira Coff <kiracmillcreekeng.com>
Sent: Thursday, July 25, 2819 2:20 PM
To: Lauren Light <Ilightweldgov.com>
Cc: Brittany Scha ma u n <britta ny.scha mau n@blackmtn.com›; Chris Gathman
<cgath ma n@weldgov.com>
Subject: Black Mountain Lost Creek USR Application Environmental Health Response to Comments
Caution: This email originated from outside of Weld County Government. Igo not click links or open attachments unless
you recognize the sender and know the content is safe.
Lauren,
Thank you for speaking with me on the phone earlier this week about the Environmental Health
Department's comments on Black Mountain's USR application. Included below is a summary of our
discussion.
• Haw will the discharge from the wash bay be contained?
Black Mountain understands no soap or detergents are allowed. Wash bay water will
consist of high pressure clean water piped from Black Mountain's water wells
located offsite; the water may be heated. All water and sediment will be captured by
a clew pout sump with overflow weir located within the wash bay floor. It has been
designed with an oil skimmer to capture any oils that may be collected by the sump
to allow for their proper disposal. The water will be recycled back into the wash
water system for reuse. Sediment will be allowed to settle and will be removed from
the containment as needed by a front end loader. The sediment is anticipated to be
free of any oils due to the oil capture/skimmer system and so will be used as backfill
during mine reclamation. If the sediment contains oils, it will be properly disposed of
off -site instead. If necessary, the sediment can be tested for the presence of oils
prior to being used as backfill.
• A cistern is allowed for potable water when a well permit cannot be obtained from the
state division of eater resources. VVater from Morgan County cannot be utilized for
potable water unless the state will not issue a well permit. Please address that
requirement. As this is a temporary use EH policy does allow ,battled water and
p a rta b le toilets.
Potable water needs at the site will not be temporary. They will be required 24 hours
a day throughout the approximate 35 year life of mine. The decision to purchase
water from Morgan County Quality Water District (MCQWD), rather than permit a
potable water well through the Division of water Resources, was made based on
comments made by MCQWD during Black Mountain's state application comment
period and at the request of MCwQD itself. They prefer this option over Black
Mountain permitting and installing their own potable water well. MCQWD owns 5
municipal wells west of the application site with water piped to gathering tanks
located adjacent to Black Mountain's project boundary in Section 10 before being
piped further east to the municipal system. MCQWD has stated that water could be
piped directly from their gathering tanks to the processing facility for all potable
water use at the site. The site would not be connected to Morgan County's
municipal water system. MCQwD's water does not need to be treated prior to its
use. If necessary due to pressure and flow requirements, the water can be pumped
to a designated potable water storage tank within Black Mountain's facility; a cistern
is not proposed for use at the site. Black Mountain is currently coordinating with
MCQWD and a copy of the water purchase agreement will be provided to weld
County when finalized.
Please let me know if you have any other questions or comments.
Thank your
Kira
Kira Coff
Environmental Permitting Specialist
illcreekitMining
GROUP
1011 E. Murray Holladay Road, Suite 100
Salt Lake City, Utah 84117
PIS: 801-904-2260
Fax: 801-904-2261
Cell: 801-608-6206
Email: kirac@millcreekeng.com
wwwom illcreekmg.com
www.millcreekeng.com
From: Kira Coif
To: Lauren Light
Cc: Brittany Schamaun; Chris Gathman
Subject: Black Mountain Lost Creek USR Application Environmental Health Response to Comments
Date: Thursday, July 25, 2019 2:19:50 PM
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.
Lauren
r
Thank you for speaking with me on the phone earlier this week about the Environmental Health
Department's comments on Black Mountain's USR application. Included below is a summary of our
discussion.
• ,How will the discharge from the wash bay be contained?
Black Mountain understands no soap or detergents are allowed. Wash bay water will
consist of high pressure clean water piped from Black Mountain's water wells
located offsite; the water may be heated. All water and sediment will be captured by
a Ilea nowt sump with overflow weir located within the gash bay floor. It has been
designed with an oil skimmer to capture any oils that may be collected by the sump
to allow for their proper disposal. The water will be recycled back into the wash
water system for reuse. Sediment will be allowed to settle and will be removed from
the containment as needed by a front end loader. The sediment is anticipated to be
free of any oils due to the oil capture,/skimmer system and so will be used as backfill
during mine reclamation. If the sediment contains oils, it will be properly disposed of
off -site instead. If necessary, the sediment can be tested for the presence of oils
prior to being used as backfill.
• A cistern is allowed for potable water when a well permit cannot be obtained from the
state division of water resources. Water from Morgan County cannot be utilized for
potable water unless the state will not issue a well permit. Please address that
requirement. As this is a temporary use EH policy does allow bottled water and
portable toilets.
Potable water needs at the site will not be temporary. They will be required 24 hours
a day throughout the approximate 35 year life of mine. The decision to purchase
water from Morgan County Quality Water District (MCQWD), rather than permit a
potable water well through the Division of water Resources, was made based on
comments made by MCQwD during Black Mountain's state application comment
period and at the request of MCwQD itself. They prefer this option over Black
Mountain permitting and installing their own potable water well. MCQWD owns 5
municipal wells west of the application site with water piped to gathering tanks
located adjacent to Black Mountain's project boundary in Section 10 before being
piped further east to the municipal system. MCQWD has stated that water could be
piped directly from their gathering tanks to the processing facility for all potable
water use at the site. The site would not be connected to Morgan County's
municipal water system. MCQwD's water does not need to be treated prior to its
use. If necessary due to pressure and flow requirements, the water can be pumped
to a designated potable water storage tank within Black Mountain's facility; a cistern
is not proposed for use at the site. Black Mountain is currently coordinating with
MCQWD and a copy of the water purchase agreement will he provided to Weld
County when finalized.
Please let me know if you have any other questions or comments.
Thank you,
Kira
Kira Coff
Environmental Permitting Specialist
MilicreeksMining
GRUM-
1011 E. Murray Holladay Road, Suite 100
Salt Lake City, Utah 84117
Ph: 801-904-2260
Fax: 801-904-2261
Cell: 801-608-6206
Email: kirac@millcreekeng.com
www.m illcreekmg.com
www. m i I Ic reekeng.co m
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