HomeMy WebLinkAbout1.07 Erosion_Sediment Control PlanErosion and Sediment Control Plan
PDC Energy
Piceance Centralized Soil Treatment Facility
OLSSON
ASSOCIATES
OA Project No. 011 -2627
760 Horizon Drive, Suite 102 1 Grand Junction, CO 81506 1 TEL 970.263.7800 1 FAX 970.263.7456
O\OLSSON
ASSOCIATES
Ed Winters
PDC Energy Inc.
120 N. Railroad Avenue, Suite D
Parachute, CO 81635
Re: Garfield County Erosion and Sediment Control Plan
Centralized Soil Treatment Facility
Dear Mr. Winters:
January 18, 2013
Olsson Associates (Olsson) has prepared a drainage report, stormwater management plan, and
construction documents for use in the submittal of the Erosion and Sediment Control Plan.
The project has been designed in accordance with the Colorado Oil and Gas Conservation
Commission (COGCC) standards. The planned use of the site is a Centralized Soil Treatment
Facility.
Erosion and Sediment Control Plan
a. Site Map: A location map and site plan can be found within the construction documents,
sheets 3 and 4 of 7, respectively.
b. Drainage Structures: Stormwater conveyance within the site consists of small diameter
culverts and drainage swales. The run -off control is handled through the use of an on-
site retention pond. Run -on control is handled with perimeter berms and swales.
Information related to drainage structures can be found within the grading plan, sheet 5
of 7 of the construction plans.
c. Topography: The existing and proposed topography is shown within the grading plan,
sheet 5 of 7 of the construction documents.
d. Grading Plan: The grading plan is sheet 5 of 7 of the construction documents.
e. Soil Stockpile and Snow Storage Areas: Soil stockpiles and snow storage are
anticipated to be within the inactive soil treatment cell.
f. Drainage Plan: The drainage plan is within the Drainage Report, PDC Centralized Soil
Treatment Facility, Garfield County, Colorado.
g. Equipment Storage Areas: Equipment storage is anticipated to be off -site.
h. Temporary Roads: An access road exists to the west of the project site. Roadway
improvements are planned under a separate cover prepared by Olsson Associates.
Internal roadways are planned and can be seen on the typical section plan and profile,
sheet 6 of 7 of the construction documents.
826 211/2 Road TEL 970.263.7800
Grand Junction, CO 81505
FAX 970.263.7456 www.oaconsulting.com
i. Areas of Steep Slope: Areas of steep slopes exist within the run -on and run -off control
measures and are illustrated within the grading plan, sheet 5 of 7 of the construction
documents.
j. Construction Schedule: A construction schedule is being developed by PDC Energy Inc.
k. Permanent Stabilization: Permanent stabilization shall be in accordance with the
Stormwater Management Plan prepared by Olsson Associates.
1. Erosion Control Measures: Erosion control measures shall be in accordance with the
Stormwater Management Plan prepared by Olsson Associates.
m. Estimated Cost: Estimated costs are included in Attachment A of the Form 28 submittal
to the COGCC,
n. Calculations: Drainage calculations are within the Drainage Report, PDC Centralized
Soil Treatment Facility, Garfield County, Colorado.
o. Description of Neighboring Areas: The site is surrounded by oil and gas activity.
p. Description of Stormwater Management Plan Concept: The stormwater management
plan concept is described within the Stormwater Management Plan prepared by Olsson
Associates.
q. Hydrologic and Hydraulic Calculations: Hydrologic and Hydraulic calculations are within
the Drainage Report, PDC Centralized Soil Treatment Facility, Garfield County,
Colorado.
r. Maintenance Requirements: The site shall be inspected and maintained in accordance
with the Stormwater Management Plan prepared by Olsson Associates.
s. Copy of Stormwater Management Plan application: The application can be found within
the Stormwater Management Plan prepared by Olsson Associates.
t. Additional Information: None.
u. Signature Block: See below.
If you should have any questions regarding the documents provided please let me know.
Sincerely,
tki,x12
Wyatt E. Popp, PE
Olsson Associates
Senior Project Engineer
826 211,4 Road TEL 970.263.7800
Grand Junction, CO 81505
FAX 970.263.7456 www.oaconsulting.com
ENGINEER'S ESTIMATE OF PROBABLE COSTS
PDC
Land Farm
2/29/2012
ITEM
Prepared By: Olsson Associates
Site Removal Items
I UNIT I QUANTITY I UNIT COST I COST
Clearing & grubbing
Disposal of remaining treated soil
ACRE
LS
7
1
$500.00
$20,000.00
$3,500
$20,000
Removal of CMP culverts (incl end sections)
LF
265
$20.00
$5,300
Removal of chain link fence
LF
2,480
$3.00
$7,440
Removal of gates
EACH
1
$200.00
$200
Earthwork (CIP)
CY
8,000
$20.00
$160,000
Earthwork - Export /haul
CY
12,000
$20.00
$240,000
Removal and stockpiling roadway aggregate
CY
2,200
$30.00
$66,000
Topsoil redistribution, scarification and reseeding
ACRE
9
$3,000.00
$27,000
Site SUBTOTAL
Misc
$529,440
Testing
LS
1
$10,000.00
$10,000
Mobilization
LS
1
$5,000.00
$5,000
Stormwater and Erosion Control
LS
1
$5,000.00
$5,000
Misc SUBTOTAL
ESTIMATE SUBTOTAL
20% CONTINGENCY
$20,000
$549,440
$109,888
Estimated Costs - TOTAL
$659,328
Notes:
1. Opinion of probable cost prepared by Olsson Associates based upon proposed design.
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