HomeMy WebLinkAbout1.05 Grading_Drainage Plan.pdfGrading and Drainage Plan
OXY USA WTP LP
Core Pad Storage
OLSSON
ASSOCIATES
OA Project No. 013 -0867
760 Horizon Drive, Suite 102 1 Grand Junction, CO 81506 1 TEL 970.263.7800 1 FAX 970.263.7456
O\OLSSON
ASSOCIATES
Daniel Padilla
OXY USA WTP LP
760 Horizon Drive, Suite 101
Grand Junction, CO 81601
Re: Garfield County Grading and Drainage Plan
Core Pad Storage Area
Dear Mr. Padilla:
July 25, 2013
Olsson Associates (Olsson) has conducted a review of the existing conditions for the
preparation of the Grading and Drainage 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 storage area. A Reclamation Plan
has been prepared by Olsson Associates to accommodate this project.
Grading and Drainage Plan
1. Site Map: The proposed site will not differ from the existing site. The existing site
features are identified within the Reclamation Plan.
2. Drainage Structures: Additional design is not anticipated since the proposed site and
the existing site are the same. Additional disturbance is not anticipated.
3. Topography: The attached exhibit within the Reclamation Plan illustrates the existing
topography of the site. Additional grading is not anticipated.
4. Grading Plan: The existing topography is anticipated to remain.
5. Soil Stockpile and Snow Storage Areas: Soil stockpiles and snow storage is not
anticipated to differ from the existing use.
6. Drainage Plan: The existing drainage patterns are not anticipated to be modified.
7. Equipment Storage Areas: The proposed use of the facility is for storage. No hazardous
material is expected to be stored at the site. Best management practices outlined within
the stormwater management plan referenced in the Reclamation Plan will be followed.
8. Temporary Roads: Temporary roads are not anticipated with the development. The
existing infrastructure is expected to serve the site.
9. Areas of Steep Slope: The existing side slopes surrounding the site are steeper than
20% and are expected to remain undisturbed.
10. Construction Schedule: A construction schedule is not anticipated since the site currently
exists.
11. Permanent Stabilization: The site is currently stabilized through the use of existing
vegetation.
760 Horizon Drive TEL 970.263.7800
Grand Junction, CO 81506
FAX 970.263.7456 www.oaconsulting.com
12. Erosion Control Measures: Erosion control measures are not anticipated since the site is
currently stabilized.
13. Estimated Cost: Construction was under an APD. This is an existing site and no new
construction is anticipated.
14. Calculations: Drainage design is not included since there are no anticipated changes to
drainage patterns.
15. Neighboring Areas: The site is surrounded by oil and gas activity.
16. Stormwater Management: Stormwater management will be in accordance with the
previously prepared stormwater management plan referenced within the Reclamation
Plan.
17. Stormwater Management Plan: A copy of the permit is included within the Reclamation
Plan.
18. Reclamation Plan: A Reclamation Plan is included with the submittal.
19. Hydraulic Calculations: Drainage design is not included since there are no anticipated
changes to drainage patterns.
20. Maintenance Requirements: Maintenance requirements are discussed within the
stormwater management plan referenced within the Reclamation Plan.
21. Spill Prevention Control and Countermeasures Plan: Not applicable.
22. Additional Information: None.
23. Signature Block: See below.
Additional construction is not anticipated, therefore, the previously stabilized areas are not
anticipated to be disturbed.
If you should have any questions regarding the site observations or the documents provided
please let me know.
Sincerely,
Wyatt E. Popp, PE
Olsson Associates
Senior Project Engineer
760 Horizon Drive TEL 970.263.7800
Grand Junction, CO 81506
FAX 970.263.7456 www.oaconsulting.com