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海豹入工岛位于阿拉斯加波席特海，在Mukluk人工岛东南约7．1km处．它在设计上同Mukluk人工岛相似，但是存在下述两点重要的区别．（1）冬季利用冰面形成的通路建造（与夏季使用驳船建造相对比）．（2）明显较软的海底浅层土质条件．由于可预计到有较大的融冰下沉以及作为冬季建岛填料的土质松软，这种土质具有低切变强度和浅层海底弱切变强度．这就提出了必须克服解决的重大设计问题．采用的新处理方法是，确定浅层上质切变强度特征和估计稳定性，有效的强度，结合13m的水深，可采用一个比以前坡度稍微平缓的人工岛设计方案．并对临时建造斜坡采取一个可能的限制．
The Seal Island is located in the Porlet Sea, Alaska, about 7.1km southeast of the artificial island of Mukluk. It is similar in design to the Mukluk artificial island, but there are two important differences. (1) Access to ice formed in winter (as opposed to barge construction in summer). (2) Obviously softer subsoil shallow soil conditions. This soil has low shear strength and weak sub-shear strength of the shallow seafloor, due to the predictable large melting ice subsidence and the soft soil as a filler for winter construction. This raises major design issues that must be overcome. The new treatment method used is to determine the shear strength characteristics of upper superplasticity and to estimate the stability and effective strength, combined with a water depth of 13m, which can be used to design an artificial island that is slightly smoother than before. With one possible limitation on the temporary construction of slopes.