| Black Diamond Classic | Date: May 7, 2018 Venue: Coal City - Coal City, IL |
Girls 4 x 400m Relay
| Finals: Heat #1|2 |
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| Place | Overall | Team | Time | Score |
|---|---|---|---|---|
| 1 | 7 | Wilmington (Dodge, Haga, Rink, Sanchez) | 4:45.26 | - |
| 2 | 8 | Providence Catholic (McGuire, Plantz, Pietka, Gallagher) | 4:51.67 | - |
| 3 | 9 | Manteno (Benegas, Tamblyn, Willis, Prather) | 4:57.37 | - |
Finals: Heat #2
|
| Place | Overall | Team | Time | Score |
|---|---|---|---|---|
| 1 | 1 | Seneca (Alley, Ursua, Carajohn, Odum) | 4:18.90 | 10 |
| 2 | 2 | Herscher (Cotter, Raymond, Meyer, Rogers) | 4:22.47 | 8 |
| 3 | 3 | Plano (Martinez, Edwards, Gonzalez, Mercado) | 4:27.94 | 6 |
| 4 | 4 | Prairie Central (Dotterer, Buff, Kinkade, Kinkade) | 4:33.73 | 4 |
| 5 | 5 | Dwight (Croy, Huffaker, Scott, Ramsey) | 4:42.05 | 2 |
| 6 | 6 | Morris (Hoaglund, Spaulding, McKinney, Mayberry) | 4:42.40 | 1 |