DWR_3603747

• Document Type - Guidance Documents: Guideline
• Topic: Water Administration
• Title: Division 1 - South Platte River Administrative Guideline: Administration Number ‎(aka Holt Number)‎
• Document Date: 7/28/2009

ADMINISTRATION GUIDELINE
Administration Number (aka Holt Number)
Division One — South Platte River
The "Admin Number" was developed by the Division of Water Resources (Ken Holt, Division 6
hydrographer) to provide a simple ranking of water rights' priorities. The number references the number
of days since December 31, 1849, an entirely arbitrary date except for the fact that it is prior to the most
senior Colorado water right.
The Admin Number requires the following data:
• Adjudication Date of the subject water right'
• Previous Adjudication Date'
• Appropriation Date of the subject water right
The Admin Number is in the form: XXXXX.YYYYY
The left side of the number (XXXXX) is the number of days between December 31, 1849 and the latter of
the Previous Adjudication Date and the Appropriation Date.
• If the Appropriation Date is later than the Previous Adjudication Date, then the left side of the
Admin Number (XXXXX) is the number representing the Appropriation Date and the right side
(YYYYY) is five zeroes ("00000").
• If the Appropriation Date is earlier than the Previous Adjudication Date, then the left side of the
Admin Number (XXXXX) is the number representing the Previous Adjudication Date and the right
side (YYYYY) is the number that represents the Appropriation Date.
Once the left and right sides of the Admin Number are determined, the Admin Number should be viewed
as a single number with 10 significant digits; the smaller the Admin Number, the more senior the water
right. There are basically three categories of Admin Numbers.
Original" adjudications (no Previous Adjudication Date exists):
Lower Boulder Ditch Admin No
Adj Date 06/02/1882 3561.00000
Previous Adj Date None 1
Appropriation Date 10/01/1859
2. Supplemental adjudications (a previous adjudication exists) with an Appropriation Date later than
the Previous Adjudication Date:
Beaver Brook Pipeline Admin No
Adj Date 05/13/1936 24745.00000
Previous Adj Date 10/09/1895 1
Appropriation Date 10/01/1917
3. Supplemental adjudications with an Appropriation Date earlier than the Previous Adjudication
Date:
Barnes Meadow Reservoir Admin No
Adj Date 12/18/1945 26409.26135
Previous Adj Date 04/22/1922 t
Appropriation Date 07/22/1921
Administration Guideline — Admin Number
July 28, 2009