2019-02-15_PERMIT FILE - M2018060

• Permit No: M2018060
• IBM Index Class Name: PERMIT FILE
• Doc Date: 2/15/2019
• Doc Name: Adequacy Review Response
• From: Applegate Group
• To: DRMS
• Email Name: ECS
• Media Type: D
• Archive: No

Eric Scott
RE:Response to Preliminary Review of a 112 Construction Materials Reclamation Permit Application Package,
Tollgate Pit,File No.M-2018-060
February 15, 2019
Page 5 of 7
TABLE 2. ENGINEERS OPINION OF PROBABLE CONSTRUCTION COST FOR TOLLGATE PIT RECLAMATION
Item Description Quantity Unit Total
No. Cost
1 Site Grading HR 40 $150 $6,000
2 Topsoiling HR 56 $200 $11,223
3 Cover Crop prior to native seeding LS 1 $930 $930
4 Seed Mix LS 1 $130 $130
5 Drill Seeding Application AC 8 $100 $800
6 Armored Inlet-Type M Soil Riprap(at
cutoff and below high water mark) CY 659 $78 $51,422
7 Armored Inlet-Free Draining Bedding
structural backfill,CDOT Class I CY 248 $42 $10,422
8 Armored Inlet-Spillway concrete or
equivalent bank protection CY 248 $60 $14,889
9 Armored Inlet-Concrete cutoff walls CY 19 $60 $1,111
10 Mobilization/Demobilization of all
equipment LS 10% $9,693 $9,693
Construction Subtotal $106 620
Contingency/Missing Items % 10% $11,000
Construction Total $117,620
Regarding the placement of topsoil and seeding, assuming the high-water mark is approximately 15 feet
below the top of mining area gives approximately 47.5 feet of bank from the top of natural grade down to
the assumed high-water line. With approximately 4,240 linear feet of mine perimeter,that area equates to
4.62 acres.The topsoil/stockpile area is approximately 3 acres,so the total area required to be topsoiled and
seeded is 7.62 acres(conservatively increased to 8 acres in order to include any areas of heavy equipment
traffic).These areas will be covered with 6-12 inches of topsoil.The topsoil will be moved a short distance
as it is being stored on-site,the travel distance should be no more than 0.4 miles maximum.Operations will
consist of 10 loads per hour and 23 cubic yards per load. This equates to approximately 561.16 loads or
56.12 hours.
The cost for native seed was calculated using the recommended seed mix from the USDA-MRCS for the
project location and estimates of cost per pure live seed(PLS)per species from Pawnee Buttes Seed Inc.3
The cost was calculated by converting the cost per PLS per species into a total cost per species for the full
reclamation area(approximately 8 acres). A weighted average was calculated based on the percentage of
each seed species to use as an approximate estimate for the seed mix. As mentioned, it is recommended
that a cover crop is grown in the reclaimed area to create better growing conditions for the native seed.This
cost was accounted for by using the same estimate as the native seed,in order to remain conservative.
The cost for the armored inlet will include a small amount of grade work,topsoiling and seeding(included
in the total for these items), spillway grade concrete, CDOT Class 1 bedding and Type M Rprap. These
3 https://pawneebuttesseed.com/pasture-reclamation/
www.applegategroup.com Denver • Glenwood Springs 9 Hotchkiss [phone]