pˈɪɹz jˈuːʒuːəli hæv dˈiːp tʃˈænəlz dᵻɹˈɛktli ˌʌndɚ ðˌɛm wˌɪtʃ kæn fˈɔːɹm sˈændbɑːɹz ɔnðə sˈaɪdz, mˌeɪkɪŋ bˈɛɾɚ wˈeɪvz æt ðə pˈɪɹ.
Piers usually have deep channels directly under them which can form sandbars on the sides, making better waves at the pier.