DSHW-2024-007798

CIVCO Engineering, Inc.
Civil Engineering Consultants
PO Box 1758 * 1256 W 400 S, Suite 1
Vernal, Utah 84078

Phone [phone] * Fax [phone]
Email: [e-mail]

ENVIRONMENT ENERGY INNOVATIONS
PLEASANT VALLEY, UTAH
CLOSURE COSTS
The EEI facility is planned to close each cell as the waste reaches the final design grade. The closure cost
for the EEI facility is based on the cost of the placement and grading of 18 inches of compacted soil, or
equivalent, with a permeability of 1x10-5 cm/sec or less, or equivalent placed upon the final lifts and a
6-inch topsoil layer and seeding of topsoil. Closure cost estimates were obtained from an independent
contractor.

Upon closure of all cells the parking area, office spaces, and loading and unloading facilities will be removed
and the area graded, topsoil layer added and seeding of topsoil to provide a natural looking surface. The
cost of doing this work is estimated at $20,000.

The closure cost of cell 7 is $1,055,000 as shown in Table 1.

Closure Cost for Cell 7
Task Description Total Cost Details
Closure Cost
Per Cell
Letter of Notification of Closure $2,000 Letter to DWMRC and County
Cover and Topsoil Material $1,020,000
Seeding/Mulching $8,000
Contingency $25,000
Total Cost Per Cell $1,055,000
Table 1 Closure Costs

POST CLOSURE CARE COSTS
Post closure care of inactive sections of the EEI facility will consist of maintaining the integrity of the final
and vegetative covers. Any areas subject to erosion will be corrected and appropriate measures will be
implemented to identify and eliminate the run-on source. No active or technical devices are proposed
for at the EEI facility. Best management practices will be implemented to minimize infiltration and
assure the integrity of the run-on/run-off system. An evaluation of the system will be made during the
quarterly inspections and corrective measures if any will be implemented. All run-on and run-off from
events smaller than the 25-year storm will be controlled through drainage design.
Post closure care costs are estimated by the cost of maintaining the previously described activities for a
30-year period. The estimated cost of the post closure care tasks is approximately $31,000 for cell 7 as
shown in Table 2.

Post Cost for EEI Facility

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Task Description Unit Cost Hours per year Unit Type Years Total
Units
Total Cost
28 years Details
Inspections
Quarterly 1st 2 years; $30 4 hours 2 8 $240
Semiannually for 28 years $30 2 hours 28 56 $1,680
Ground Water
Testing
Not required as investigations have revealed there is no ground water present near the site
Report

Quarterly 1st 2 years; $30 4 hours 2 8 $240

Semiannually for 28 years $30 2 hours 28 56 $1,680

Subtotal for 30
years $3,840

Maintenance Replacing topsoil 1 $24,000 Assumes 10% will need to be replaced
Reseeding 1 $1,000 Assumes 10% will need to be replaced
Subtotal for 30
years $28,840
Contingency $2,900 (10%)

Post Closure
Cost cell 7 $31,740

Table 2 Post Closure Care Costs