▁Illinois ▁Route ▁ 1 7 3 . ▁The ▁head w aters ▁of ▁N ipp ers ink ▁Creek ▁origin ate ▁at ▁the ▁High ▁Point ▁Unit ▁of ▁the ▁Mc Hen ry ▁County ▁Conserv ation ▁District , ▁flow ing ▁to ▁the ▁sout heast ▁and ▁east . ▁In ▁terms ▁of ▁ge ographic ▁coordinates , ▁the ▁community ▁is ▁located ▁at ▁ ▁( 4 2 . 4 5 8 9 0 7 5 , ▁- 8 8 . 5 1 7 8 7 5 7 ) ▁In ▁terms ▁of ▁the ▁Public ▁Land ▁Survey ▁System , ▁Ald en ▁is ▁located ▁within ▁the ▁S out heast ▁Qu arter ▁of ▁Section ▁ 1 5 ▁and ▁the ▁N ortheast ▁Qu arter ▁of ▁Section ▁ 2 3 , ▁Township ▁ 4 6 ▁North , ▁Range ▁ 6 ▁East ▁of ▁the ▁Third ▁Princi pal ▁Mer id ian . ▁Ald en ▁is ▁served ▁by ▁the ▁Harvard , ▁Illinois ▁ 6 0 0 3 3 ▁post ▁office . ▁ ▁Point s ▁of ▁interest ▁A ▁small ▁commercial ▁district ▁is ▁located ▁at ▁the ▁highway ▁j unction . ▁The ▁Ald en ▁Township ▁facility ▁is ▁just ▁south ▁of ▁the ▁community ▁at ▁ 8 5 1 5 ▁Ald en ▁Road . ▁ ▁See ▁also ▁Ald en ▁Township , ▁Mc Hen ry ▁County , ▁Illinois ▁ ▁References ▁▁ ▁Category : Un in cor por ated ▁communities ▁in ▁Illinois ▁Category : Un in cor por ated ▁communities ▁in ▁Mc Hen ry ▁County , ▁Illinois ▁Category : Ch icago ▁metropol itan ▁area <0x0A> </s> ▁Po ek il oc er us ▁is ▁a ▁genus ▁of ▁grass