Note 1  Description of Organization and Business Operations Industrea Acquisition Corp. (Industrea) was incorporated in Delaware on April 7, 2017 for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses. As of December 5, 2018, Industrea had not commenced any operations. All activity for the period from April 7, 2017 (date of inception) through December 5, 2018 relates to Industreas formation, its initial public offering (the Initial Public Offering), its search for a business combination and the consummation of the Business Combination (as defined below). Industrea did not generate any operating revenues prior to the completion of the Business Combination. Prior to the Business Combination, Industrea generated non-operating income in the form of interest income on cash and marketable securities from the proceeds derived from the Initial Public Offering. On August 1, 2017, Industrea consummated the Initial Public Offering of 23,000,000 units (the Units and, with respect to the shares of Class A common stock included in the Units offered, the Public Shares), including the issuance of 3,000,000 Units as a result of the underwriters exercise of their over-allotment option in full, at $10.00 per Unit, generating gross proceeds of $230 million and incurring offering costs of approximately $13.3 million, inclusive of $8.05 million in deferred underwriting commissions (Note 6). Simultaneously with the closing of the Initial Public Offering, Industrea consummated the private placement (the Private Placement) of 11,100,000 warrants (the Private Placement Warrants), at a price of $1.00 per Private Placement Warrant, with Industreas sponsor, CFLL Sponsor Holdings, LLC (f/k/a Industrea Alexandria LLC), a Delaware limited liability company, generating gross proceeds of $11.1 million. On August 22, 2017, the Sponsor sold 55,500 Private Placement Warrants at their original purchase price to each of Industreas five independent directors, or an aggregate of 277,500 Private Placement Warrants for $277,500 (Note 4). Upon the closing of the Initial Public Offering and Private Placement, $234.6 million ($10.20 per Unit) of the net proceeds of the sale of the Units in the Initial Public Offering and the Private Placement was placed in a U.S.-based trust account maintained by Continental Stock Transfer &amp; Trust Company, acting as trustee (the Trust Account). The funds held in the Trust Account were invested in U.S. government securities, within the meaning set forth in Section 2(a)(16) of the Investment Company Act 1940, as amended (the Investment Company Act), or in any open-ended investment company that holds itself out as a money market fund selected by Industrea meeting the conditions of paragraphs (d)(2), (d)(3) and (d)(4) of Rule 2a-7 of the Investment Company Act, as determined by Industrea, until the completion of the Business Combination. Industrea provided the holders (the public stockholders) of the Public Shares with the opportunity to redeem all or a portion of their Public Shares upon the completion of the Business Combination in connection with a stockholder meeting called to approve the Business Combination. The public stockholders were entitled to redeem their Public Shares for a pro rata portion of the amount then in the Trust Account. These Public Shares were recorded at a redemption value and classified as temporary equity upon the completion of the Initial Public Offering in accordance with the Financial Accounting Standards Boards (FASB) Accounting Standards Codification (ASC) Topic 480 Distinguishing Liabilities from Equity. Additionally, each public stockholder was permitted elect to redeem their Public Shares irrespective of whether they voted for or against the Business Combination. The initial stockholders (as defined below) agreed to vote their Founder Shares (as defined below in Note 5) and any Public Shares purchased during or after the Initial Public Offering in favor of a Business Combination. In addition, the initial stockholders agreed to waive their redemption rights with respect to their Founder Shares and Public Shares in connection with the completion of the Business Combination. If Industrea was unable to complete a Business Combination by August 1, 2019, which is 24 months from the closing of the Initial Public Offering (the Combination Period), Industrea would have (i) ceased all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but not more than ten business days thereafter, redeem the Public Shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account including interest earned on the funds held in the Trust Account and not previously released to Industrea to pay Industreas franchise and income taxes (less up to $100,000 of interest to pay dissolution expenses), divided by the number of then outstanding Public Shares, which redemption will completely extinguish public stockholders rights as stockholders (including the right to receive further liquidating distributions, if any), subject to applicable law, and (iii) as promptly as reasonably possible following such redemption, subject to the approval of Industreas remaining stockholders and Industreas board of directors, dissolved and liquidated subject in each case to Industreas obligations under Delaware law to provide for claims of creditors and the requirements of other applicable law. The initial stockholders agreed to waive their liquidation rights with respect to the Founder Shares if Industrea failed to complete a Business Combination within the Combination Period. However, if the initial stockholders acquired Public Shares in or after the Initial Public Offering, they were entitled to liquidating distributions from the Trust Account with respect to such Public Shares if Industrea failed to complete a Business Combination within the Combination Period. The underwriters agreed to waive their rights to their deferred underwriting commission held in the Trust Account in the event Industrea did not complete a Business Combination within the Combination Period and, in such event, such amounts would have been included with the other funds held in the Trust Account that would have been available to fund the redemption of the Public Shares. In order to protect the amounts held in the Trust Account, the Sponsor agreed to be liable to Industrea if and to the extent any claims by a vendor for services rendered or products sold to Industrea, or a prospective target business with which Industrea discussed entering into a transaction agreement, reduced the amount of funds in the Trust Account. This liability did not apply with respect to any claims by a third party who executed a waiver of any right, title, interest or claim of any kind in or to any monies held in the Trust Account or to any claims under Industreas indemnity of the underwriters of the Initial Public Offering against certain liabilities, including liabilities under the Securities Act of 1933, as amended. Moreover, in the event that an executed waiver was deemed to be unenforceable against a third party, the Sponsor would not have been responsible to the extent of any liability for such third party claims. Industrea sought to reduce the possibility that the Sponsor would have to indemnify the Trust Account due to claims of creditors by endeavoring to have all vendors, service providers, prospective target businesses or other entities with which Industrea business, execute agreements with Industrea waiving any right, title, interest or claim of any kind in or to monies held in the Trust Account. On December 6, 2018 (the Closing Date), Concrete Pumping Holdings, Inc. (f/k/a Concrete Pumping Holdings Acquisition Corp.) (New CPH), a Delaware corporation, consummated the transactions contemplated by that certain Agreement and Plan of Merger, dated as of September 7, 2018 (the Merger Agreement), by and among New CPH, Industrea, Brundage-Bone Concrete Pumping Holdings, Inc. (f/k/a Concrete Pumping Holdings, Inc.), a Delaware corporation (Prior CPH), and certain subsidiaries of New CPH, pursuant to which (a) a wholly owned indirect subsidiary of New CPH merged with and into Prior CPH, with Prior CPH surviving the merger as a wholly owned indirect subsidiary of New CPH (the CPH Merger), and (b) a wholly owned direct subsidiary of New CPH merged with and into Industrea, with Industrea surviving the merger as a wholly owned subsidiary of New CPH. The transactions contemplated by the Merger Agreement are referred to herein as the Business Combination (see Note 9). Upon the closing of the Business Combination (the Closing), all outstanding shares of Industreas Class A common stock were exchanged on a one-for-one basis for shares of New CPHs common stock, par value $0.0001 per share (CPHs common stock), and Industreas outstanding warrants were assumed by New CPH and became exercisable for shares of New CPH common stock on the same terms as were contained in such warrants prior to the Business Combination. Further information regarding the Business Combination and Prior CPH is set forth in (i) the proxy statement/prospectus included in New CPHs registration statement on Form S-4 (File No. 333-227259), as amended and supplemented, originally filed with the SEC on September 10, 2018 and (ii) New CPHs Current Report on Form 8-K filed with the SEC on December 10, 2018, as amended by New CPHs Current Report on Form 8-K/A filed with the SEC on January 29, 2019.