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impact
the, environmental scientists & engineers
1409 larimer square • denver, colorado 80202 • 303-571-1300
November 19, 1980
Ms. Mary Ann Feuerstein
Weld County Clerk and Recorder
Department of Planning Service
915 10th Street
Greeley, Colorado 80631
Dear Ms. Feuerstein:
Attached please find a copy of Amendment No. 1 to the
112 Permit Application being submitted for approval by Tucker
Aggregates, Inc. This is in compliance with your requirement
for such notification.
Cordially,
IMPACT, LTD.
' ,9:2:(--1-21-74/
ie A. Jennens
Office Manager
Enclosure
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112 Permit Application
Amendment No. 1
NLRB File No. 80-2
October, 1980
By
Impact Environmental Consultants, Ltd. co CoONTV pM"M�S3�NIl�
1409 Larimer Square r 1
Denver, Colorado 80202 � ;
NOV 25 51980
GREELEY. COI:.
STATUS OF EXHIBITS
Application Form No change
EXHIBIT A No change
EXHIBIT B No change
Adjacent Property Owners No change
Exhibit C-1 No change
Exhibit C-2 Modification attached
EXHIBIT D
Mining Plan
The applicant proposes to conduct an open pit aggregate operation in the
area shown in Exhibit C-2 revised.
The mining method remains unchanged and will consist of stripping of
topsoil and overburden (estimated thickness 0-18 inches) followed by bulldozer
pushing and loader transport or loading with scraper or truck transport to an
on-site sizing and/or washing plant. The aggregate will then be loaded in
over the road trucks for weighing and transport to various locations primarily
related to the Rawhide Power project. The mining areas and direction of
advance of mining are indicated on the revised mining plan map. The extent of
the aggregate deposit is indicated on the pre-mining map by the shaded area
derived from the Colorado Geological Survey Special Publication 5-A, Sand,
Gravel, and Quarry Aggregate Resources, Colorado Front Range Counties. In the
initial phases of the mine as the topsoil and overburden are stripped they
will be stockpiled and stabilized for later use in the reclamation program.
Stockpile areas are indicated on the mining plan map. As the mining
progresses the topsoil and overburden will be redistributed upon mined out
areas in an over the shoulder operation.
Current mine phasing has been developed based on received and anticipated
contracts through 1981. These contracts are substantially different than
those assumed when the original 112 application was filed. Anticipated
production schedules for materials are included in the following table. An
average mining volume has been established at 50,000 tons per month. As
indicated in the original application mine production could reach a maximum of
5,000 tons per day.
The principal items of mining equipment remain essentially unchanged:
Scrapers will be used for topsoil and overburden removal and for medium
distance transport of aggregate, dozers for aggregate pushing, front end
loaders for short transport of aggregate and for loading scrapers, and trucks
and over the road trucks for delivery to off site projects. A water truck
will be employed as appropriate for dust abatement, a grader for road
maintenance and other miscellaneous service, fuel and utility type vehicles
for transport of materials.
The amendment calls for water to be diverted in a ditch around unit 4 to
minimize buildup of moisture in the aggregate which has caused some difficulty
meeting specifications for concrete aggregate in the initial phases of the
— mining program. The sedimentation ponds were moved to a portion of the
previously mined flat terrain south of the plant site from the bed of Lone
Tree Creek in a recent Technical Revision (October 1980).
The average thickness of the aggregate and the overburden is indicated by
the test pit information included in the original 112 application. The pit
numbers correspond to locations on the premining map.
The aggregate is described in the Colorado Geological Survey Document
cited above in the section on Geology. The mining plan from the map has been
based on the assumption that the aggregate weight is 3,000 pounds ,per cubic
yard. This has been increased slightly from the original application based on
its moisture content. Mining unit 1 is currently being mined to satisfy
contracts for C-33 concrete sand, 3 inch minus rip rap, and class 2 filter
rock. Unit 2 is to be mined between now and the end of 1980 primarily for
class 6 roadbase. Mining unit 3 is currently covered with sand previously
generated by another operation and will be mined by the end of 1980 if the
— stockpiled sand can be marketed. The mining of unit 3 may supplement any of
the materials contracts currently anticipated.
The mining of unit 4 is to begin subsequent to the approval of this
_ amendment. It will move from north to south in segments currently indicated
as 150,000 ton increments. The projected schedule for 1980-81 shown semi-
- annually indicates an approximate mining volume of 50,000 tons per month. In
the initial stages of the mining of unit 4 a haul road will be necessary south
through the center of the unit to the existing plant site. Unit 4 will be
reclaimed in an over the shoulder manner as the mining moves southward.
Nominal pit depth will be 15 feet. General equipment and man power profiles
— have not changed substantially from those proposed in the original 112 permit.
ANTICIPATED PRODUCTION*
(1,000 Tons)
1981
Product 1980 First Half Second Half
— C-33 Sand 40 110 50
Class 4 Road Base 85 100 60
3 Inch Minus Rip Rap 10 40 --
Class 2 Filter rock 10 40 --
Concrete Aggregate -- 10 10
— Miscellaneous 5 50 50
_ * Based on actual contracts to date excepting "miscellaneous".
1981 AFFECTED ACREAGE TABLE
Disturbance'
Designation Acreage Category
Mining Unit 1 17.01 Moderate
Mining Unit 2 18.26 Moderate
Mining Unit 3 8.70 Moderate
Mining Unit 4 48.84 Moderate
Stockpiles 1.16 Moderate
1981 Plant Area2 22.56 Minor
Roads 7.58 Minor
Shop and Scale Area 6.00 Minor
'Moderate requires grading, topsoiling, and seeding. Minor requires seedbed
preparation and seeding only.
2Includes stockpiles, loadout, parking lot, and settling basins.
EXHIBIT E
Reclamation Plan
The conditions of the reclamation plan were substantially altered during
negotiations between the submittal of the 112 application and its approval .
Those conditions concluded in the following:
No slopes steeper than 2 to 1 will remain after reclamation. Slope
information is contained in the two-foot contour postmining reclamation map;
Exhibit F.
All available topsoil and overburden appropriate as growth media will be
replaced during reclamation. A nominal depth of at least 6 inches will be
sought subject to material availability.
The horseshoe shaped settling ponds south of the plant site will be
reclaimed after the operation is completed. Grading will be minimal as
containment berms are quite low. Seeding on road side embankments and other
perimeter areas of the mine will be completed in the fall of 1980 to minimize
— erosion.
All compacted areas which are not to be left in place at the request of
the landowner will be ripped to a depth of 6 to 8 inches before the preparing
the seedbed.
The seedbed will be prepared by discing and harrowing or as appropriate.
The seeding application of preference will be drilling, although the Soil
Conservation Service has indicated that either broadcasting or drilling would
be appropriate.
Mulching will be included as part of the reclamation seeding plan.
The Terry Grazing Association will be asked not to run cattle on the
reclaimed areas of Section 17 or Section 20 until the ground cover has
reestablished itself and the bond has been released.
The final seed mixture was determined to be:
Seeding Mixture
Species Pounds Per Acre
Blue Grama 1
Buffalo Grass 3
Side Oats Grama 5
Virtually no trees or shrubs exist on the site and no planting of trees
or shrubs is planned. No water is available for irrigation and no
fertilization of the soil is anticipated based on soil test results received
from Colorado State University.
EXHIBIT F Revision Attached
EXHIBIT G
Water Resources
Water is currently over allocated in the area of the project. Water
requirements for the project include those for potable and sanitary water and
those for a gravel washing plant.
Meteoric waters ultimately drain into the Platte River, the general
drainage direction of the area was shown on the pre-mining map. The drainage
in the immediate vicinity of the mine known as Lone Tree Creek is ephemeral in
nature.
Potable and sanitary water requirements are expected to be satisfied by
portable sanitation facilities and imported potable water. Domestic well
facilities are available on-site with appropriate conversion from stock water.
Tucker Aggregate has obtained a non-tributary water supply well permit
for the pumping of a substantial quantity of water from the Fox Hills
formation. That permit was granted by the State Engineers office more than
eight months subsequent to initial filing.
Water to be used in the wash plant and that required for fugitive dust
control are being obtained under the conditions of a distinct water engineer
approved augmentation plan and from reservoir rights obtained from upstream
right holders. The replacement plan for water unable to be obtained from the
reservoir rights will be from the Fox Hills formation water which transfers
with the property. A water plan was filed with and approved by the State
Engineers office.
STATUS OF EXHIBITS
- EXHIBIT H No Change
EXHIBIT I No Change
EXHIBIT J No Change
EXHIBIT K No Change
EXHIBIT L
With regard to establishment of the bond a maximum of 50,000 cubic yards
of topsoil will be stored at any one time. Replacement cost for that topsoil
was set at $15,000.
Units 1 and 2 should be ready for seeding by the late spring of 1981 with
unit 3 to follow closely thereafter. However, since the seed mixture is a
cold weather one, seeding is not contemplated until October 1981 unless the
mixture is changed. By mid 1981 ten acres of unit 4 should have been mined as
well . Seeding of units 1, 2, 3 and the north ten acres of unit 4 will be
tentatively scheduled for October of 1981.
Approximately 70 acres will remain for seedbed preparation as mining
moves to unit 4 - a worst case condition - at $110 per acre or $7,700. Twenty
additional acres could remain to be seeded by the fall of 1981 at a cost of
$120 per acre and mulched at a cost of $430 per acre or approximately
$49,500. The bond should be appropriately established at about $72,200 until
mining units 1, 2 and 3 are seeded and show signs of vegetation establishment.
EXHIBIT M
Local Government Approval
Weld County approved a Special Use Permit for the mining of this property
on March 17, 1980.
EXHIBIT N
— Other Permits & Licenses
The Colorado Department of Health has granted a fugitive dust permit. A
zero discharge NPDES permit was requested and fortunately is not required. It
has not yet surfaced in the Colorado Department of Health since the original
— application.
EXHIBIT 0 No change
— EXHIBIT P No change
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