FILED
                                                               United States Court of Appeals
                                                                       Tenth Circuit
                      UNITED STATES COURT OF APPEALS
                                                                   November 18, 2016
                                   TENTH CIRCUIT
                                                                   Elisabeth A. Shumaker
                                                                       Clerk of Court

 UNITED STATES OF AMERICA,

          Plaintiff - Appellee,

 v.                                                      No. 16-4088
                                              (D.C. No. 2:00-CR-00041-DAK-1)
 DANIEL LEE LARSEN,                                       (D. Utah)

          Defendant - Appellant.


                              ORDER AND JUDGMENT *


Before KELLY, HOLMES, and MORITZ, Circuit Judges. **


      Defendant-Appellant Daniel Lee Larsen, a federal inmate appearing pro se,

appeals from the district court’s denial of his motion for sentence reduction

pursuant to 18 U.S.C. § 3582(c)(2). 

. Exercising jurisdiction under 28

U.S.C. § 1291, we remand so the district court may vacate its order and dismiss

the motion for lack of jurisdiction.


      *
        This order and judgment is not binding precedent, except under the
doctrines of law of the case, res judicata, and collateral estoppel. It may be cited,
however, for its persuasive value consistent with Fed. R. App. P. 32.1 and 10th
Cir. R. 32.1.
      **
         After examining the briefs and the appellate record, this three-judge
panel has determined unanimously that oral argument would not be of material
assistance in the determination of this appeal. See Fed. R. App. P. 34(a); 10th
Cir. R. 34.1(G). The cause is therefore ordered submitted without oral argument.
                                     Background

      In 2001, a jury convicted Mr. Larsen of seven offenses, namely possession

of methamphetamine with intent to distribute, conspiracy to manufacture

methamphetamine, establishing a methamphetamine operation, possession of

listed chemicals (pseudoephedrine), possession of listed chemicals (iodine),

attempt to manufacture methamphetamine, and possessing a firearm in

furtherance of a drug trafficking offense, in violation of 21 U.S.C. §§ 841(a)(1),

841(d)(2), 846, 856(a)(1), 924(c).

      To establish Mr. Larsen’s base offense level, the Presentence Report (PSR)

detailed the conversions for the weights of pseudoephedrine and iodine recovered

to their corresponding weights in methamphetamine (actual) to generate a total of

16.56 kilograms of methamphetamine (actual). Under the 2001 Sentencing

Guidelines, the corresponding base offense level for 1.5 kilograms or more of

methamphetamine (actual) was 38. U.S. Sentencing Guidelines Manual

§ 2D1.1(c)(1) (2001). Mr. Larsen’s two-level increase for unlawful discharge,

emission, or release of a hazardous toxic substance; two-level increase for

obstruction of justice; and two-level decrease for his role as a minor participant

resulted in a total offense level of 40. Because the PSR indicated that Mr.

Larsen’s criminal history points placed him in Category V, his guideline range

was 360 months to life, plus an additional 60 months for the firearm offense due

to a mandatory minimum requiring 60 months, to be imposed consecutively.

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      Mr. Larsen filed no objections to the PSR, and at sentencing he only

objected to the calculation of his criminal history points, not his offense level.

The district court accepted his argument that he was at a Criminal History

Category II, which corresponded to a guideline range of 324 to 405 months, and

sentenced Mr. Larsen to 324 months on the narcotics charges, plus the

consecutive 60 months for the firearm conviction. Mr. Larsen has since made

several attempts to attack his sentence that were unsuccessful, as detailed by this

court in United States v. Larsen, 631 F. App’x 495 (10th Cir. 2015).

      In 2015, Mr. Larsen filed his motion to reduce his sentence under 18 U.S.C.

§ 3582(c)(2), contending the retroactivity of Amendment 782 rendered him

eligible for resentencing and that the district court erroneously calculated the drug

quantity that corresponded to his base offense level of 38. The district court

denied the motion, 

, and Mr. Larsen appealed.



                                      Discussion

      Although the denial of a sentence-reduction motion is reviewed for abuse

of discretion, United States v. Sharkey, 

, 1238 (10th Cir. 2008), the

scope of a district court’s authority under § 3582(c)(2) is a question of law and is

reviewed de novo, United States v. Graham, 

, 1277 (10th Cir.

2013). Generally, federal courts lack jurisdiction to modify a term of

imprisonment once it has been imposed. Dillon v. United States, 

,

                                         -3-
819 (2010). Nevertheless, a district court may modify a sentence if there is

statutory authorization to do so. 

. Section 3582(c)(2)

allows courts to consider certain factors and reduce a sentence that was based on

a sentencing range that subsequently has been lowered by the Sentencing

Commission if doing so is consistent with the Sentencing Commission’s policy

statements. 18 U.S.C. § 3582(c)(2).

      In 2014, the Sentencing Commission promulgated Amendment 782, which

provides for a retroactive, two-level decrease in the offense levels for certain drug

offenses. Also pertinent here is the Sentencing Commission’s policy statement

indicating that a sentence reduction is not authorized under § 3582(c)(2) if certain

amendments, including Amendment 782, do not have the effect of lowering the

defendant’s guideline range. U.S.S.G. § 1B1.10(a)(2)(B).

      Here, Amendment 782 does not have the effect of lowering Mr. Larsen’s

guidelines range. When he was sentenced, the base offense level for an offense

involving 1.5 kilograms or more of methamphetamine (actual) was 38. After the

promulgation of Amendment 782, the base offense level for an offense involving

4.5 kilograms or more of methamphetamine (actual) was 38. As Mr. Larsen’s

offense involved 16.56 kilograms of methamphetamine (actual), his base level

remains 38. Accordingly, Amendment 782 did not reduce the applicable

guidelines range.

      Mr. Larsen contends that the calculation of 16.56 kilograms of

                                         -4-
methamphetamine (actual) was in error. Specifically, he argues that the

substances found were never tested for purity, which is necessary to determine

how much methamphetamine (actual) could be derived from the pseudoephedrine

and iodine, and that combining the methamphetamine (actual) equivalents of the

two substances constitutes “double counting,” thereby impermissibly yielding a

higher methamphetamine (actual) equivalency. But Mr. Larsen never objected to

the original calculations of his base offense level in the PSR. Because there was

no objection and Amendment 782 has no impact on how quantities of drugs are

calculated, the district court had no ability to revisit the calculations.

         As Amendment 782 did not have the effect of lowering Mr. Larsen’s

guidelines range, the district court did not err in concluding that he was ineligible

for a sentence reduction under § 3582(c)(2). Upon reaching this conclusion,

however, the district court should have dismissed the motion for lack of subject

matter jurisdiction. See United States v. White, 

, 1250 (10th Cir.

2014).

         Accordingly, we REMAND to the district court to vacate its order and

dismiss the § 3582 motion for lack of jurisdiction. Appellant’s motion to proceed

in forma pauperis is DENIED.

                                         Entered for the Court


                                         Paul J. Kelly, Jr.
                                         Circuit Judge

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