Office of Assessor, Sublette County, WY
Phone: 307-367-4374 / 276-3827                 Fax: 307-367-3342

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How to Complete ATD40
Personal Property Rendition for Oil and Gas Equipment


Rendition(s) may be either paper or electronic (CD-ROM) - possibly both. If you have both paper and CD-ROM they do not duplicate each other. They are different parcels. If the paper printout(s) would have exceeded about 30 pages, it is being sent on CD-ROM. Rendition files on CD-ROM were made using Microsoft Word and Excel.

CHANGES you may come across in the 2009 forms - especially for larger companies - are:

1. Parcel numbers may have changed. Some parcels get difficult to work because of the huge amount of data in them. Larger parcels have been split into more manageable sizes. As part of this split, the data has been moved into parcels that can be more closely associated with oil and gas geographic areas. It depends mostly on how many wells a particular company has in a particular geographic area. Each company is looked at individually for this process. This is an ongoing project. Additional parcel splits in the future are likely.

2. Well Pads. It has become unmanageable to try to separate which particular piece of equipment goes with a particular well on a multi-well pad. What you will typically see for well pads is a simpler, more manageable, equipment listing. Most large companies have been very helpful in providing well listings that indicate which wells are associated with which pad. We have tried to follow your listings, and pad identification system, as closely as possible. This is an ongoing project.

Basically, there will be a ‘Master Well’ for each well pad. That ‘Master Well’ is typically the well after which the well pad has been named by your company.

Each well on that well pad will have an individual equipment listing, usually just one line, for the wellhead (christmas tree) equipment.

In almost all other cases, all the remaining equipment for that well pad will be listed on the ‘Master Well’. You need to verify that duplications do not exist for overall well pad equipment.

Example: A well pad that has six associated wells. Usually there will be only one equipment line listing, the wellhead, for five of the wells. The sixth well, the ‘Master Well’, will have an equipment line for its wellhead PLUS all the other equipment on that pad.

There is a cross reference IDNO (column A) that will allow you to associate wells with well pads. If you sort your Excel spreadsheet by IDNO it should place all your pad wells together in consecutive order by well pad/well name. For paper printouts look for an entry in the Asset # column to sort by.

3. Quantity vs Cost: Pay particular attention to line items that have a number greater than ‘1’ in the QUANTITY column. Make sure the ACQCOST reflects the installed cost of a single item - not the total cost of all the items. The computer will automatically multiply the QUANTITY number times the ACQCOST to arrive at a total value for that line. Particular attention should be given to Tanks and Gas Production Units.

Reporting Back

  1. Regardless of whether you have received paper or CD renditions we MUST receive back a signed affidavit statement report for each parcel/account number.


  2. Report new wells via paper. If the new well is on a well pad, please also indicate the name of the well pad.


  3. If you received a CD-ROM with an Excel spreadsheet you may also respond via the spreadsheet. Use:
    Light pink ‘highlight’ to indicate items that should be DELETED. Add comments to the right if needed for clarification.

    Light yellow ‘highlight’ to indicate items that should be CHANGED. Add comments to the right indicating what those changes should be.

    Light blue ‘highlight’ to indicate items that should be COMBINED. Add comments to the right indicating what should be combined.

    Light green ‘highlight’ to indicate items that should be ADDED to an existing well. Add comments to the right indicating to which well it should be added. These entries can all be placed at the bottom of the spreadsheet.

Make sure you also send the required SIGNED AFFIDAVIT STATEMENT ON PAPER FOR EACH PARCEL. Your signed statement should add a reference to your CD-ROM which should be identified by a number or dated title. Use a CD-R (not a CD-RW) to preclude any alteration once data is burned to the CD-ROM.

Please note that your provided information is hand entered into our computer system. Keep things easy to understand.

Click here for CD-ROM Spreadsheet Examples and additional information.

B. D. Johnson
Oil & Gas Field Lister
Email: barryj@sublettewyo.com
Ph:     307-367-4374

Return Renditions to:
Janet L. Montgomery
Sublette County Assessor
21 S. Tyler Ave, Box 2057
Pinedale, WY 82941
Email: janetm@sublettewyo.com