Top 67 Contractors in PSC Z1KA: Maintenance of Dams, Jul 2025–Jun 2026

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Code page on GovTribe

The top 10 won 88% of PSC Z1KA contract dollars from July 2025 through June 2026

Ranking facts

Contract obligations
$164,748,444 Net of deobligations, by contracts coded PSC Z1KA
Contractors
69 Parent companies with an obligation
Largest contractor
Alberici Constructors Inc $68.2 million, 40.4% of obligations
Data as of

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 67 rows as CSV

Full ranking

Rank Contractor Net obligations Share Trend
1
Alberici Constructors Inc
$68,166,000
Rank history: not on the FY2021–FY2022 lists, #18 in FY2023, #46 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
2 $17,055,100
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
3
Occi Inc
$14,763,000
Rank history: not on the FY2021–FY2023 lists, #47 in FY2024 and #1 in FY2025; new, not ranked in Jul 2024–Jun 2025.
4 $13,987,789
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
5 $9,191,344
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
6 $8,500,000
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
7
American Mine Services LLC Through AMS Industrial LLC
$7,461,047
Rank history: not on the FY2021–FY2024 lists and #13 in FY2025; new, not ranked in Jul 2024–Jun 2025.
8
Marine Diving Solutions LLC.
$5,276,420
Rank history: #16 in FY2021, #8 in FY2022, #7 in FY2023, #4 in FY2024 and #5 in FY2025; down 5 since Jul 2024–Jun 2025.
9 $2,376,250
Rank history: not on the FY2021–FY2024 lists and #3 in FY2025; down 3 since Jul 2024–Jun 2025.
10 $2,097,170
Rank history: not on the FY2021–FY2022 lists, #2 in FY2023, #2 in FY2024 and #10 in FY2025; down 9 since Jul 2024–Jun 2025.
11 $2,063,000
Rank history: not on the FY2021 list, #1 in FY2022, #6 in FY2023, #6 in FY2024 and #2 in FY2025; down 7 since Jul 2024–Jun 2025.
12 $1,878,000
Rank history: not on the FY2021–FY2024 lists and #7 in FY2025; new, not ranked in Jul 2024–Jun 2025.
13 $1,723,588
Rank history: not on the FY2021 list, #13 in FY2022, #3 in FY2023, #1 in FY2024 and #15 in FY2025; down 11 since Jul 2024–Jun 2025.
14 $1,388,905
Rank history: not on the FY2021 list, #20 in FY2022, not on the FY2023 list, #33 in FY2024 and #12 in FY2025; new, not ranked in Jul 2024–Jun 2025.
15 $1,236,368
Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; new, not ranked in Jul 2024–Jun 2025.
16 $1,116,246
Rank history: not on the FY2021–FY2024 lists and #14 in FY2025; new, not ranked in Jul 2024–Jun 2025.
17
Slayden Constructors Inc
$949,528
Rank history: not on the FY2021–FY2022 lists, #1 in FY2023, #39 in FY2024 and #9 in FY2025; down 4 since Jul 2024–Jun 2025.
18 $772,000
Rank history: not on the FY2021–FY2024 lists and #16 in FY2025; new, not ranked in Jul 2024–Jun 2025.
19 $732,964
Rank history: not on the FY2021 list, #59 in FY2022, #45 in FY2023, #11 in FY2024 and #21 in FY2025; new, not ranked in Jul 2024–Jun 2025.
20 $659,500
Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #17 in FY2025; down 12 since Jul 2024–Jun 2025.
21 $631,074
Rank history: not on the FY2021–FY2022 lists, #10 in FY2023, #40 in FY2024 and #18 in FY2025; up 12 since Jul 2024–Jun 2025.
22 $470,688
Rank history: not on the FY2021 list, #5 in FY2022, not on the FY2023 list, #32 in FY2024 and #34 in FY2025; up 3 since Jul 2024–Jun 2025.
23 $464,774
Rank history: not on the FY2021–FY2023 lists, #3 in FY2024 and #33 in FY2025; down 13 since Jul 2024–Jun 2025.
24 $367,782
Rank history: not on the FY2021–FY2024 lists and #45 in FY2025; up 5 since Jul 2024–Jun 2025.
25 $351,575
Rank history: not on the FY2021–FY2024 lists and #20 in FY2025; new, not ranked in Jul 2024–Jun 2025.
26 $279,306
Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and #22 in FY2025; new, not ranked in Jul 2024–Jun 2025.
27 $272,149
Rank history: not on the FY2021–FY2024 lists and #67 in FY2025; new, not ranked in Jul 2024–Jun 2025.
28 $264,598
Rank history: not on the FY2021–FY2024 lists and #29 in FY2025; new, not ranked in Jul 2024–Jun 2025.
29 $258,480
Rank history: not on the FY2021 list, #36 in FY2022, #8 in FY2023, #35 in FY2024 and #6 in FY2025; down 20 since Jul 2024–Jun 2025.
30 $225,000
Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; new, not ranked in Jul 2024–Jun 2025.
31 $224,052
Rank history: not on the FY2021–FY2024 lists and #25 in FY2025; new, not ranked in Jul 2024–Jun 2025.
32 $215,670
Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; new, not ranked in Jul 2024–Jun 2025.
33 $215,000
Rank history: #28 in FY2021, #16 in FY2022, #27 in FY2023, not on the FY2024 list and #27 in FY2025; new, not ranked in Jul 2024–Jun 2025.
34 $197,000
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
35 $186,200
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
36 $175,926
Rank history: not on the FY2021–FY2024 lists and #31 in FY2025; new, not ranked in Jul 2024–Jun 2025.
37 $151,490
Rank history: #44 in FY2021, #40 in FY2022, #29 in FY2023, #24 in FY2024 and #36 in FY2025; down 13 since Jul 2024–Jun 2025.
38 $149,277
Rank history: not on the FY2021–FY2024 lists and #35 in FY2025; new, not ranked in Jul 2024–Jun 2025.
39 $125,000
Rank history: not on the FY2021–FY2024 lists and #37 in FY2025; new, not ranked in Jul 2024–Jun 2025.
40 $113,992
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
41 $103,864
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
42 $95,574
Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; new, not ranked in Jul 2024–Jun 2025.
43 $78,568
Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; new, not ranked in Jul 2024–Jun 2025.
44 $70,700
Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; down 8 since Jul 2024–Jun 2025.
45 $66,923
Rank history: not on the FY2021–FY2024 lists and #43 in FY2025; new, not ranked in Jul 2024–Jun 2025.
46 $65,438
Rank history: not on the FY2021–FY2024 lists and #44 in FY2025; new, not ranked in Jul 2024–Jun 2025.
47
Ruhrpumpen Inc.
$60,840
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
48
Nascence Group LLC
$48,346
Rank history: not on the FY2021–FY2024 lists and #57 in FY2025; new, not ranked in Jul 2024–Jun 2025.
49
GPM Inc
$37,565
Rank history: not on the FY2021–FY2024 lists and #51 in FY2025; new, not ranked in Jul 2024–Jun 2025.
50 $33,063
Rank history: not on the FY2021–FY2024 lists and #53 in FY2025; down 13 since Jul 2024–Jun 2025.
51 $27,160
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
52 $26,070
Rank history: not on the FY2021 list, #77 in FY2022, #26 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
53 $25,850
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
54 $25,350
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
55 $24,290
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
56 $20,299
Rank history: #76 in FY2021, not on the FY2022 list, #54 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
57 $16,775
Rank history: not on the FY2021–FY2024 lists and #50 in FY2025; down 15 since Jul 2024–Jun 2025.
58 $14,000
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
59 $13,203
Rank history: not on the FY2021–FY2023 lists, #44 in FY2024 and #55 in FY2025; down 20 since Jul 2024–Jun 2025.
60 $11,448
Rank history: not on the FY2021–FY2024 lists and #19 in FY2025; down 45 since Jul 2024–Jun 2025.
61 $10,135
Rank history: #29 in FY2021, #29 in FY2022, not on the FY2023–FY2024 lists and #52 in FY2025; down 21 since Jul 2024–Jun 2025.
62 $10,020
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
63 $9,591
Rank history: #66 in FY2021, not on the FY2022–FY2024 lists and #30 in FY2025; down 42 since Jul 2024–Jun 2025.
64 $6,365
Rank history: not on the FY2021–FY2024 lists and #62 in FY2025; down 15 since Jul 2024–Jun 2025.
65 $2,315
Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
66
DB Netz AG Regionalnetz Oberpfalz
$1,634
Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; new, not ranked in Jul 2024–Jun 2025.
67 $1,332
Rank history: not on the FY2021–FY2022 lists, #16 in FY2023, not on the FY2024 list and #47 in FY2025; down 36 since Jul 2024–Jun 2025.
Show 42 more

67 of 69 contractors listed here. See the rest on GovTribe.

How this ranking works

  • Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
  • Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $169 million obligated before deobligations, so they never pass 100%.
  • Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
  • Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
  • Rank changes compare with Jul 2024–Jun 2025. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
  • Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list.
  • Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 PSC Z1KA contractors in Jul 2025–Jun 2026?

1. Alberici Constructors Inc ($68.2M), 2. Allison Park Contractors, Inc. ($17.1M), 3. Occi Inc ($14.8M), 4. Koontz Electric Company, Incorporated ($14M), 5. T1 Construction LLC ($9.19M), 6. Hardman Construction Inc. ($8.5M), 7. American Mine Services LLC ($7.46M), 8. Marine Diving Solutions LLC. ($5.28M), 9. Patterson Stevens Inc. ($2.38M), 10. Abhe & Svoboda, Inc. ($2.1M).

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