UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 144

NOTICE OF PROPOSED SALE OF SECURITIES
PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933

ATTENTION:  Transmit for filing 3 copies of this form concurrently with either placing an order with a broker to execute sale or executing a sale directly with a market maker

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         SEC USE ONLY

DOCUMENT SEQUENCE NO.

CUSIP NUMBER

WORK LOCATION

1(a) NAME OF ISSUER (Please type or print)

    Questar Corporation

(b) IRS IDENT. NO.

  87-0407509

(c) S.E.C. FILE NO.

    1-8796

1(d) ADDRESS OF ISSUER

    180 East 100 South
    Salt Lake City, Utah 84111

(e)TELEPHONE

AREA CODE

801

NUMBERS

324-5202

2 (a)
NAME OF PERSON FOR WHOSE ACCOUNT THE SECURITIES ARE TO BE SOLD

     Robert E. Kadlec

(b)
IRS IDENT. NO.
 
700-39-7490

(c)  RELATIONSHIP TO ISSUER


    Director

(d) ADDRESS

    5733 Bluebell Drive

INSTRUCTION: The person filing this notice should contact the issuer to obtain the I.R.S. identification Number and the S.E.C. File Number.

3(a)
Title of the Class of Securities To Be Sold

(b)
Name and Address of Each Broker Through Whom the Securities are to be Offered or Each Market Maker who is Acquiring the Securities

SEC USE ONLY

(c)
Number of Shares or Other Units To Be Sold
(See instr. 3(c))

(d)
Aggregate Market Value
(See instr. 3(d))

(e)
Number of Shares or Other Units Outstanding
(See instr. 3(e))

(f)
Approximate Date of Sale
(See instr. 3(f))

(MO.   DAY   YR.)

(g)
Name of Each Securities Exchange
(See instr. 3(g))

Broker-Dealer File Number

Common Stock (and attached Common Stock Purchase Rights)

BMO Naisbitt Burns
P.O. Box 49101
595 Vurrard Street
Vancouver, B.C.

Canada V7W 1T2

8,000

$632,000

85,129,514

09-07-2005

NYSE

INSTRUCTIONS:

1.

(a)

Name of issuer

(b)

Issuer's I.R.S. Identification Number

(c)

Issuer's S.E.C. file number, if any

(d)

Issuer's address, including zip code

(e)

Issuer's telephone number, including area code

2.

(a)

Name of person for whose account the securities are to be sold

(b)

Such person's I.R.S. identification number, if such person is an entity

(c)

Such person's relationship to the issuer (e.g., officer, director, 10% stockholder, or member of immediate family of any of the foregoing)

(d)

Such person's address, including zip code

3.

(a)

Title of the class of securities to be sold

(b)

Name and address of each broker through whom the securities are intended to be sold

(c)

Number of shares or other units to be sold (if debt securities, give the aggregate face amount)

(d)

Aggregate market value of the securities to be sold as of a specified date within 10 days prior to the filing of this notice

(e)

Number of shares or other units of the class outstanding, or if debt securities the face amount thereof outstanding, as shown by the most recent report or statement published by the issuer

(f)

Approximate date on which the securities are to be sold

(g)

Name of each securities exchange, if any, on which the securities are intended to be sold

Potential persons who are to respond to the collection of information contained in this form are not

required to respond unless the form displays a currently valid OMB control number.

SEC 1147 (01-04)

TABLE I -- SECURITIES TO BE SOLD
Furnish the following information with respect to the acquisition of the securities to be sold
and with respect to the payment of all or any part of the purchase price or other consideration therefor:

Title of the Class

Date you acquired

Nature of Acquisition Transaction

Name of Person from Whom Acquired
(If gift, also give date donor acquired)

Amount of Securities Acquired

Date of Payment

Nature of Payment

Common Stock (and attached Common Stock Purchase Rights)

Within the past 5 years

Direct from Questar (stock options and stock received as fee payments)

Questar Corporation

In excess of 10,000

2000-2004

Cash

INSTRUCTIONS:

If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

TABLE 2 -- SECURITIES SOLD DURING THE PAST 3 MONTHS
Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold:

Name and
Address of Seller

Title of Securities Sold

Date of Sale

Amount of Securities Sold

Gross Proceeds

BMO Naisbitt Burns
P.O. Box 49101
595 Vurrard Street
Vancouver, B.C.

Canada V7W 1T2

Common Stock (and attached Common Stock Purchase Rights)

7/5/2005

7,000

$487,249

BMO Naisbitt Burns
P.O. Box 49101
595 Vurrard Street
Vancouver, B.C.

Canada V7W 1T2

Common Stock (and attached Common Stock Purchase Rights)

7/5/2005

2,000

$139,038

BMO Naisbitt Burns
P.O. Box 49101
595 Vurrard Street
Vancouver, B.C.

Canada V7W 1T2

Common Stock (and attached Common Stock Purchase Rights)

6/28/2005

.871

$57.77

BMO Naisbitt Burns
P.O. Box 49101
595 Vurrard Street
Vancouver, B.C.

Canada V7W 1T2

Common Stock (and attached Common Stock Purchase Rights)

6/15/2005

1,000

$65,000

REMARKS:

INSTRUCTIONS:
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed.

September 8, 2005

/s/Abigail L. Jones

______________________________

Date of Notice

________________________________

Abigail L. Jones as Attorney in Fact
for R. E. Kadlec

The notice shall be signed by the person for whose account the securities are to be sold.  At least one copy of the notice shall be manually signed.
Any copies not manually signed shall bear typed or printed signatures.

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

SEC 1147 (01-04)