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  <infoTable>
    <nameOfIssuer>AMERICAN CENTY ETF TR</nameOfIssuer>
    <titleOfClass>INTL SMCP VLU</titleOfClass>
    <cusip>025072802</cusip>
    <value>14525664</value>
    <shrsOrPrnAmt>
      <sshPrnamt>132800</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>132800</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>DIMENSIONAL ETF TRUST</nameOfIssuer>
    <titleOfClass>INTERNATIONAL</titleOfClass>
    <cusip>25434V690</cusip>
    <value>4396027</value>
    <shrsOrPrnAmt>
      <sshPrnamt>97322</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>97322</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>EVERUS CONSTR GROUP</nameOfIssuer>
    <titleOfClass>COM</titleOfClass>
    <cusip>300426103</cusip>
    <value>7385192</value>
    <shrsOrPrnAmt>
      <sshPrnamt>62842</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>62842</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>ISHARES INC</nameOfIssuer>
    <titleOfClass>CORE MSCI EMKT</titleOfClass>
    <cusip>46434G103</cusip>
    <value>14209087</value>
    <shrsOrPrnAmt>
      <sshPrnamt>175075</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>175075</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>ISHARES INC</nameOfIssuer>
    <titleOfClass>MSCI JAPAN ETF</titleOfClass>
    <cusip>46434G822</cusip>
    <value>13762327</value>
    <shrsOrPrnAmt>
      <sshPrnamt>141210</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>141210</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>ISHARES TR</nameOfIssuer>
    <titleOfClass>MSCI EAFE ETF</titleOfClass>
    <cusip>464287465</cusip>
    <value>7556439</value>
    <shrsOrPrnAmt>
      <sshPrnamt>72735</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>72735</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>ISHARES TR</nameOfIssuer>
    <titleOfClass>RUSSELL 2000 ETF</titleOfClass>
    <cusip>464287655</cusip>
    <value>1906923</value>
    <shrsOrPrnAmt>
      <sshPrnamt>6862</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>6862</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>ISHARES TR</nameOfIssuer>
    <titleOfClass>MSCI ACWI ETF</titleOfClass>
    <cusip>464288257</cusip>
    <value>2137173</value>
    <shrsOrPrnAmt>
      <sshPrnamt>13461</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>13461</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>ISHARES TR</nameOfIssuer>
    <titleOfClass>NATIONAL MUN ETF</titleOfClass>
    <cusip>464288414</cusip>
    <value>79364</value>
    <shrsOrPrnAmt>
      <sshPrnamt>785</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>785</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>ISHARES TR</nameOfIssuer>
    <titleOfClass>INTL SEL DIV ETF</titleOfClass>
    <cusip>464288448</cusip>
    <value>7918430</value>
    <shrsOrPrnAmt>
      <sshPrnamt>187685</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>187685</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>ISHARES TR</nameOfIssuer>
    <titleOfClass>PFD AND INCM SEC</titleOfClass>
    <cusip>464288687</cusip>
    <value>5900</value>
    <shrsOrPrnAmt>
      <sshPrnamt>200</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>200</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>ISHARES TR</nameOfIssuer>
    <titleOfClass>EAFE VALUE ETF</titleOfClass>
    <cusip>464288877</cusip>
    <value>35931539</value>
    <shrsOrPrnAmt>
      <sshPrnamt>454025</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>454025</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>ISHARES TR</nameOfIssuer>
    <titleOfClass>EAFE GRWTH ETF</titleOfClass>
    <cusip>464288885</cusip>
    <value>2194741</value>
    <shrsOrPrnAmt>
      <sshPrnamt>18315</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>18315</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>KNIFE RIVER CORP</nameOfIssuer>
    <titleOfClass>COMMON STOCK</titleOfClass>
    <cusip>498894104</cusip>
    <value>5118134</value>
    <shrsOrPrnAmt>
      <sshPrnamt>101510</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>101510</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>MDU RES GROUP INC</nameOfIssuer>
    <titleOfClass>COM</titleOfClass>
    <cusip>552690109</cusip>
    <value>4549976</value>
    <shrsOrPrnAmt>
      <sshPrnamt>245414</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>245414</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>PEPSICO INC</nameOfIssuer>
    <titleOfClass>COM</titleOfClass>
    <cusip>713448108</cusip>
    <value>396127</value>
    <shrsOrPrnAmt>
      <sshPrnamt>3126</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>3126</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>SELECT SECTOR SPDR TR</nameOfIssuer>
    <titleOfClass>ST STR ENERG ETF</titleOfClass>
    <cusip>81369Y506</cusip>
    <value>23923500</value>
    <shrsOrPrnAmt>
      <sshPrnamt>389000</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>389000</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>SPDR SERIES TRUST</nameOfIssuer>
    <titleOfClass>ST TERM HIGH ETF</titleOfClass>
    <cusip>78468R408</cusip>
    <value>11805385</value>
    <shrsOrPrnAmt>
      <sshPrnamt>486820</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>486820</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>TCW ETF TRUST</nameOfIssuer>
    <titleOfClass>TRANSFRM 500 ETF</titleOfClass>
    <cusip>29287L106</cusip>
    <value>73618671</value>
    <shrsOrPrnAmt>
      <sshPrnamt>817456</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>817456</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD BD INDEX FDS</nameOfIssuer>
    <titleOfClass>VANGUARD ULTRA</titleOfClass>
    <cusip>92203C303</cusip>
    <value>74310135</value>
    <shrsOrPrnAmt>
      <sshPrnamt>1499700</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>1499700</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD INDEX FDS</nameOfIssuer>
    <titleOfClass>S&amp;P 500 ETF SHS</titleOfClass>
    <cusip>922908363</cusip>
    <value>822969610</value>
    <shrsOrPrnAmt>
      <sshPrnamt>1174228</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>1174228</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD INDEX FDS</nameOfIssuer>
    <titleOfClass>MRNGSTR GRWT ETF</titleOfClass>
    <cusip>922908736</cusip>
    <value>9405095</value>
    <shrsOrPrnAmt>
      <sshPrnamt>104373</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>104373</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD INDEX FDS</nameOfIssuer>
    <titleOfClass>MRNGSTR VAL ETF</titleOfClass>
    <cusip>922908744</cusip>
    <value>4442414</value>
    <shrsOrPrnAmt>
      <sshPrnamt>20559</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>20559</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD INTL EQUITY INDEX F</nameOfIssuer>
    <titleOfClass>TT WRLD ST ETF</titleOfClass>
    <cusip>922042742</cusip>
    <value>22307362</value>
    <shrsOrPrnAmt>
      <sshPrnamt>141320</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>141320</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD INTL EQUITY INDEX F</nameOfIssuer>
    <titleOfClass>FTSE EMR MKT ETF</titleOfClass>
    <cusip>922042858</cusip>
    <value>7659313</value>
    <shrsOrPrnAmt>
      <sshPrnamt>129140</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>129140</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD INTL EQUITY INDEX F</nameOfIssuer>
    <titleOfClass>FTSE PACIFIC ETF</titleOfClass>
    <cusip>922042866</cusip>
    <value>35065531</value>
    <shrsOrPrnAmt>
      <sshPrnamt>302785</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>302785</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD INTL EQUITY INDEX F</nameOfIssuer>
    <titleOfClass>FTSE EUROPE ETF</titleOfClass>
    <cusip>922042874</cusip>
    <value>1802836</value>
    <shrsOrPrnAmt>
      <sshPrnamt>20770</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>20770</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD MALVERN FDS</nameOfIssuer>
    <titleOfClass>TOTAL TREASURY</titleOfClass>
    <cusip>922020680</cusip>
    <value>3327573</value>
    <shrsOrPrnAmt>
      <sshPrnamt>46063</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>46063</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD MALVERN FDS</nameOfIssuer>
    <titleOfClass>GOVT ACTIV ETF</titleOfClass>
    <cusip>922020714</cusip>
    <value>466636</value>
    <shrsOrPrnAmt>
      <sshPrnamt>6479</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>6479</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD SCOTTSDALE FDS</nameOfIssuer>
    <titleOfClass>SHRT TRM CORP BD</titleOfClass>
    <cusip>92206C409</cusip>
    <value>77946023</value>
    <shrsOrPrnAmt>
      <sshPrnamt>1009010</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>1009010</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD SCOTTSDALE FDS</nameOfIssuer>
    <titleOfClass>MTG-BKD SECS ETF</titleOfClass>
    <cusip>92206C771</cusip>
    <value>42201491</value>
    <shrsOrPrnAmt>
      <sshPrnamt>950270</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>950270</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD STAR FDS</nameOfIssuer>
    <titleOfClass>VG TL INTL STK F</titleOfClass>
    <cusip>921909768</cusip>
    <value>238320429</value>
    <shrsOrPrnAmt>
      <sshPrnamt>2805090</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>2805090</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD TAX-MANAGED FDS</nameOfIssuer>
    <titleOfClass>VAN FTSE DEV MKT</titleOfClass>
    <cusip>921943858</cusip>
    <value>2394953</value>
    <shrsOrPrnAmt>
      <sshPrnamt>33918</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>33918</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD WHITEHALL FDS</nameOfIssuer>
    <titleOfClass>HIGH DIV YLD</titleOfClass>
    <cusip>921946406</cusip>
    <value>19324728</value>
    <shrsOrPrnAmt>
      <sshPrnamt>124515</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>124515</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD WHITEHALL FDS</nameOfIssuer>
    <titleOfClass>INTL HIGH ETF</titleOfClass>
    <cusip>921946794</cusip>
    <value>9455655</value>
    <shrsOrPrnAmt>
      <sshPrnamt>93500</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>93500</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD WORLD FD</nameOfIssuer>
    <titleOfClass>ESG INTL STK ETF</titleOfClass>
    <cusip>921910725</cusip>
    <value>19544502</value>
    <shrsOrPrnAmt>
      <sshPrnamt>241082</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>241082</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD WORLD FD</nameOfIssuer>
    <titleOfClass>ESG US STK ETF</titleOfClass>
    <cusip>921910733</cusip>
    <value>33726948</value>
    <shrsOrPrnAmt>
      <sshPrnamt>248852</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>248852</None>
    </votingAuthority>
  </infoTable>
  <infoTable>
    <nameOfIssuer>VANGUARD WORLD FD</nameOfIssuer>
    <titleOfClass>MRNGSTR MEGA CAP</titleOfClass>
    <cusip>921910816</cusip>
    <value>1342238</value>
    <shrsOrPrnAmt>
      <sshPrnamt>14487</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
    </shrsOrPrnAmt>
    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>0</Sole>
      <Shared>0</Shared>
      <None>14487</None>
    </votingAuthority>
  </infoTable>
</informationTable>
