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USD ($)

USD ($) / shares

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&lt;div style="font-family: 'Times New Roman',Times,serif;"&gt;

&lt;div style="margin-top: 12pt; font-size: 10pt;" align="left"&gt;&lt;b&gt;5. Receivables&lt;/b&gt; &lt;/div&gt;

&lt;div style="margin-top: 6pt; font-size: 10pt;" align="left"&gt;Our receivables are presented in the following balance sheet accounts: (1)&amp;nbsp;Accounts receivable, (2) Accounts receivable &amp;#8212; long term, (3)&amp;nbsp;Unbilled work on uncompleted contracts, and (4)&amp;nbsp;Contract costs incurred not yet recognized. Accounts receivable are stated at net realizable value, and the allowances for uncollectible accounts were $2.8&amp;nbsp;million at both December&amp;nbsp;31, 2010 and 2009. Accounts receivable at December&amp;nbsp;31, 2010 and 2009 included $0.6&amp;nbsp;million and $25.0&amp;nbsp;million, respectively, of retainage, which represents the short-term portion of amounts not immediately collectible due to contractually specified requirements. Accounts receivable &amp;#8212; long term at December&amp;nbsp;31, 2010 represented amounts related to retainage which were not expected to be collected within the next twelve months. &lt;/div&gt;

&lt;div style="margin-top: 6pt; font-size: 10pt;" align="left"&gt;Our accounts receivable also included claims and unapproved change orders of $16.7&amp;nbsp;million at December&amp;nbsp;31, 2010 and $28.0&amp;nbsp;million at December&amp;nbsp;31, 2009. These claims and change orders are amounts due for extra work and/or changes in the scope of work on certain projects. &lt;/div&gt;&lt;/div&gt;

&lt;div style="font-family: 'Times New Roman',Times,serif;"&gt;

&lt;div style="margin-top: 6pt; font-size: 10pt;" align="left"&gt;The costs and estimated earnings on uncompleted contracts are presented in the following table: &lt;/div&gt;

&lt;div align="center"&gt;

&lt;table style="font-size: 10pt;" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr valign="bottom"&gt;&lt;td width="76%"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td width="5%"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td width="1%"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td width="5%"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td width="1%"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td width="5%"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td width="1%"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td width="5%"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td width="1%"&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="font-size: 8pt;" valign="bottom"&gt;&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-bottom: #000000 1px solid;" colspan="6" nowrap="nowrap" align="center"&gt;&lt;b&gt;December 31,&lt;/b&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="font-size: 8pt;" valign="bottom"&gt;&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"&gt;&lt;b&gt;2010&lt;/b&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-bottom: #000000 1px solid;" colspan="2" nowrap="nowrap" align="center"&gt;&lt;b&gt;2009&lt;/b&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="font-size: 8pt;" valign="bottom"&gt;&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td colspan="6" nowrap="nowrap" align="center"&gt;&lt;i&gt;(in thousands)&lt;/i&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="background: #cceeff;" valign="bottom"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;Costs incurred and recognized on uncompleted contracts&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="left"&gt;$&lt;/td&gt;
&lt;td align="right"&gt;309,725&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="left"&gt;$&lt;/td&gt;
&lt;td align="right"&gt;891,530&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr valign="bottom"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;Estimated earnings&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;38,871&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;66,179&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="font-size: 1px;"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;&amp;nbsp;&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-top: #000000 1px solid;" colspan="2" nowrap="nowrap" align="right"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-top: #000000 1px solid;" colspan="2" nowrap="nowrap" align="right"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="background: #cceeff;" valign="bottom"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;Costs and estimated earnings on uncompleted contracts&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;348,596&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;957,709&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr valign="bottom"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;Less: Billings to date&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td nowrap="nowrap" align="left"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;(299,932&lt;/td&gt;
&lt;td nowrap="nowrap"&gt;)&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td nowrap="nowrap" align="left"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;(873,636&lt;/td&gt;
&lt;td nowrap="nowrap"&gt;)&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="font-size: 1px;"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;&amp;nbsp;&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-top: #000000 1px solid;" colspan="2" nowrap="nowrap" align="right"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-top: #000000 1px solid;" colspan="2" nowrap="nowrap" align="right"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="background: #cceeff;" valign="bottom"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;&amp;nbsp;&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;48,664&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;84,073&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr valign="bottom"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;Plus: Accrued revenue&lt;sup style="font-size: 85%; vertical-align: text-top;"&gt;(1)&lt;/sup&gt;&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;7,488&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;8,496&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="background: #cceeff;" valign="bottom"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;Less: Advance billings on uncompleted contracts&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td nowrap="nowrap" align="left"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;(221&lt;/td&gt;
&lt;td nowrap="nowrap"&gt;)&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td nowrap="nowrap" align="left"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;(175&lt;/td&gt;
&lt;td nowrap="nowrap"&gt;)&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="font-size: 1px;"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;&amp;nbsp;&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-top: #000000 1px solid;" colspan="2" nowrap="nowrap" align="right"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-top: #000000 1px solid;" colspan="2" nowrap="nowrap" align="right"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr valign="bottom"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;&amp;nbsp;&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="left"&gt;$&lt;/td&gt;
&lt;td align="right"&gt;55,931&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="left"&gt;$&lt;/td&gt;
&lt;td align="right"&gt;92,394&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="font-size: 1px;"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;&amp;nbsp;&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-top: #000000 3px double;" colspan="2" nowrap="nowrap" align="right"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-top: #000000 3px double;" colspan="2" nowrap="nowrap" align="right"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr valign="bottom"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;&amp;nbsp;&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="background: #cceeff;" valign="bottom"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;Included in accompanying balance sheets under the following captions:&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr valign="bottom"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 45px;"&gt;Unbilled work on uncompleted contracts&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="left"&gt;$&lt;/td&gt;
&lt;td align="right"&gt;56,152&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="left"&gt;$&lt;/td&gt;
&lt;td align="right"&gt;92,569&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="background: #cceeff;" valign="bottom"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 45px;"&gt;Other accrued liabilities&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td nowrap="nowrap" align="left"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;(221&lt;/td&gt;
&lt;td nowrap="nowrap"&gt;)&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td nowrap="nowrap" align="left"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="right"&gt;(175&lt;/td&gt;
&lt;td nowrap="nowrap"&gt;)&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="font-size: 1px;"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;&amp;nbsp;&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-top: #000000 1px solid;" colspan="2" nowrap="nowrap" align="right"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-top: #000000 1px solid;" colspan="2" nowrap="nowrap" align="right"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr valign="bottom"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;&amp;nbsp;&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="left"&gt;$&lt;/td&gt;
&lt;td align="right"&gt;55,931&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td align="left"&gt;$&lt;/td&gt;
&lt;td align="right"&gt;92,394&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="font-size: 1px;"&gt;&lt;td&gt;

&lt;div style="text-indent: -15px; margin-left: 15px;"&gt;&amp;nbsp;&lt;/div&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-top: #000000 3px double;" colspan="2" nowrap="nowrap" align="right"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td style="border-top: #000000 3px double;" colspan="2" nowrap="nowrap" align="right"&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;

&lt;div align="left"&gt;

&lt;div style="margin-top: 16pt; width: 18%; font-size: 3pt; border-top: #000000 1px solid;"&gt; &lt;/div&gt;&lt;/div&gt;

&lt;table style="font-size: 10pt;" border="0" cellspacing="0" cellpadding="0" width="100%"&gt;
&lt;tr&gt;&lt;td width="3%"&gt; &lt;/td&gt;
&lt;td width="1%"&gt; &lt;/td&gt;
&lt;td width="96%"&gt; &lt;/td&gt;&lt;/tr&gt;
&lt;tr valign="top"&gt;&lt;td nowrap="nowrap" align="left"&gt;&lt;sup style="font-size: 85%; vertical-align: text-top;"&gt;(1)&lt;/sup&gt;&lt;/td&gt;
&lt;td&gt;&amp;nbsp;&lt;/td&gt;
&lt;td&gt;Accrued revenue represents unbilled amounts receivable related to work performed on projects for which the percentage of completion method is not applicable.&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt; &lt;/div&gt;</NonNumbericText><NonNumericTextHeader>5. Receivables

Our receivables are presented in the following balance sheet accounts: (1)&amp;nbsp;Accounts receivable, (2) Accounts receivable &amp;#8212; long</NonNumericTextHeader><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios></Cell></Cells><OriginalInstanceReportColumns /><Unit>Other</Unit><ElementDataType>us-types:textBlockItemType</ElementDataType><SimpleDataType>string</SimpleDataType><ElementDefenition>Includes disclosure of claims held for amounts due a company. Examples include trade accounts receivables, notes receivables, loans receivables.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 08
 -Paragraph k
 -Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 02
 -Paragraph 3, 4
 -Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 03
 -Paragraph 7
 -Article 9

Reference 4: http://www.xbrl.org/2003/role/presentationRef
 -Publisher AICPA
 -Name Statement of Position (SOP)
 -Number 01-6
 -Paragraph 13
 -Subparagraph d

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