---
kind: "section"
citation: "46 C.F.R. § 170.300"
title: "46"
number: "170.300"
heading: "Special consideration for free surface of spoil in hopper dredge hoppers."
url: "https://uscodex.org/cfr/46/170.300"
---

# §170.300. Special consideration for free surface of spoil in hopper dredge hoppers.


The calculations required by this subchapter for each self-propelled hopper dredge must include—

- (a) The free surface effect of consumable liquids and the free surface effect of the dredged spoil in the hoppers; and
- (b) Either of the following assumptions when performing the calculations required by [§ 174.310(b)](/cfr/46/174.310.md?p=b) of this chapter:
  - (1) If the dredged spoil is assumed to be jettisoned, the free surface of the dredged spoil may be disregarded.
  - (2) If the dredged spoil is not assumed to be jettisoned. the free surface of the dredged spoil must be calculated.

## Notes

### Amendments

[CGD 76-080, 54 FR 36977, Sept. 6, 1989]

### Authority

Authority: 43 U.S.C. 1333; 46 U.S.C. 2103, 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: CGD 79-023, 48 FR 51010, Nov. 4, 1983, unless otherwise noted.

### Amendments

[CGD 76-080, 54 FR 36977, Sept. 6, 1989]