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Tulsa District

Run scraper

The application is to accommodate the expansion of the existing Sundance Airpark by extending a runway approximately 2

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The application is to accommodate the expansion of the existing Sundance Airpark by extending a runway approximately 2,000 feet. The proposed runway extension would permanently impact aquatic features that are jurisdictional waters of the United States. The proposed permanent aquatic impacts as shown in the enclosed Figure 4 would be approximately 0.049 acre of NDF-1, 0.408 acre of PEM1-1, 0.070 acre of PF01-1, and 5.304 acres of PUB-1.

The applicant proposes to place approximately 53,563 cys of native fill material into an unnamed tributary to Deer Creek below its OHWM, equating to approximately 0.478 acre in two proximate locations, 0.049 acre comprising 268 If of ephemeral steam impacts, and 5.304 acre of permanent impacts to the existing 25.11 acre stormwater retention impoundment, partially filling it. Partially filling the existing stormwater retention impoundment would account for approximately 91% of all fill placed into the aquatic environment for this project. The fill material would be acquired from on-site excavation, expanding the existing impoundment southerly into an area paralleling and on the east side of the proposed runway extension. Additionally, the applicant proposes constructing a 12- by 6-foot reinforced concrete box culvert to convey ephemeral and upland drainage into the newly expanded stormwater retention impoundment. The box culvert would be overlain by the proposed new runway.

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