SEGMENT INFORMATION (Tables)

9 Months Ended

Jun. 30, 2026

SEGMENT INFORMATION

Schedule of segment financial information

	Underground
	Infrastructure			Industrial			Building
Three Months Ended June 30, 2026	Construction			Construction			Construction			Total
Revenues	$	71,439,367		$	44,677,594		$	13,888,967		$	130,005,928
Segment direct operating expenses (excluding depreciation)		61,342,374			38,654,003			12,442,374			112,438,751
Direct depreciation expense		2,579,382			670,570			—			3,249,952
Segment gross profit		7,517,611			5,353,021			1,446,593			14,317,225
Segment gross profit percentage		10.5	%		12.0	%		10.4	%		11.0	%
Selling, general, and administrative expenses		5,513,469			1,160,147			960,531			7,634,147
Indirect depreciation expense		—			—			112,640			112,640
Intangible asset amortization expenses		311,547			54,720			—			366,267
Segment indirect operating expenses		5,825,016			1,214,867			1,073,171			8,113,054
Segment income from operations		1,692,595			4,138,154			373,422			6,204,171
Segment operating margin percentage		2.4	%		9.3	%		2.7	%		4.8	%
Corporate and non-allocated costs											1,567,530
Corporate depreciation expense											4,721
Total consolidated income from operations										$	4,631,920

	Underground
	Infrastructure			Industrial			Building
Nine Months Ended June 30, 2026	Construction			Construction			Construction			Total
Revenues	$	186,885,975		$	114,821,093		$	35,584,502		$	337,291,570
Segment direct operating expenses (excluding depreciation)		157,591,501			99,801,182			31,611,363			289,004,046
Direct depreciation expense		7,766,653			1,977,518			—			9,744,171
Segment gross profit		21,527,821			13,042,393			3,973,139			38,543,353
Segment gross profit percentage		11.5	%		11.4	%		11.2	%		11.4	%
Selling, general, and administrative expenses		15,449,819			3,295,886			3,062,012			21,807,717
Indirect depreciation expense		—			—			337,914			337,914
Intangible asset amortization expenses		898,002			164,160			—			1,062,162
Segment indirect operating expenses		16,347,821			3,460,046			3,399,926			23,207,793
Segment income from operations	$	5,180,000		$	9,582,347		$	573,213		$	15,335,560
Segment operating margin percentage		2.8	%		8.3	%		1.6	%		4.5	%
Corporate and non-allocated costs											4,722,470
Corporate depreciation expense											9,994
Total consolidated income from operations										$	10,603,096

At June 30, 2026
	Underground
	Infrastructure			Industrial	Building
Property, plant and equipment, at cost, less accumulated depreciation	Construction		Construction		Construction		Total
Segments	$	37,409,209	$	14,321,956	$	1,122,837	$	52,854,002
Corporate		—		—		—		90,407
Total	$	37,409,209	$	14,321,956	$	1,122,837	$	52,944,409

	Underground
	Infrastructure			Industrial			Building
Three Months Ended June 30, 2025	Construction			Construction			Construction			Total
Revenues	$	55,384,307		$	35,044,725		$	13,172,553		$	103,601,585
Segment direct operating expenses (excluding depreciation)		45,879,667			31,393,379			11,310,572			88,583,618
Direct depreciation expense		2,410,049			625,320			—			3,035,369
Segment gross profit		7,094,591			3,026,026			1,861,981			11,982,598
Segment gross profit percentage		12.8	%		8.6	%		14.1	%		11.6	%
Selling, general, and administrative expenses		5,530,973			1,029,731			713,973			7,274,677
Indirect depreciation expense		—			—			90,429			90,429
Intangible asset amortization expenses		174,812			18,162			—			192,974
Segment indirect operating expenses		5,705,785			1,047,893			804,402			7,558,080
Segment income from operations		1,388,806			1,978,133			1,057,579			4,424,518
Segment operating margin percentage		2.5	%		5.6	%		8.0	%		4.3	%
Corporate and non-allocated costs											1,255,048
Corporate depreciation expense											1,417
Total consolidated income from operations										$	3,168,053

	Underground
	Infrastructure			Industrial			Building
Nine Months Ended June 30, 2025	Construction			Construction			Construction			Total
Revenues	$	140,748,952		$	103,135,570		$	37,042,328		$	280,926,850
Segment direct operating expenses (excluding depreciation)		125,397,809			92,609,898			32,144,288			250,151,995
Direct depreciation expense		6,551,528			1,899,287			—			8,450,815
Segment gross profit		8,799,615			8,626,385			4,898,040			22,324,040
Segment gross profit percentage		6.3	%		8.4	%		13.2	%		7.9	%
Selling, general, and administrative expenses		15,070,458			2,993,889			2,291,594			20,355,941
Indirect depreciation expense		—			—			257,868			257,868
Intangible asset amortization expenses		441,097			18,162			—			459,259
Segment indirect operating expenses		15,511,555			3,012,051			2,549,462			21,073,068
Segment (loss) income from operations		(6,711,940)			5,614,334			2,348,578			1,250,972
Segment operating margin percentage		(4.8)	%		5.4	%		6.3	%		0.4	%
Corporate and non-allocated costs											4,524,423
Corporate depreciation expense											4,762
Total loss from operations										$	(3,278,213)

At June 30, 2025
	Underground
	Infrastructure			Industrial	Building
Property, plant and equipment, at cost, less accumulated depreciation	Construction		Construction		Construction		Total
Segments	$	39,016,246	$	14,058,440	$	976,689	$	54,051,375
Corporate		—		—		—		39,276
Total	$	39,016,246	$	14,058,440	$	976,689	$	54,090,651