跳转到内容

File:Evitts Creek Aqueduct C and O Canal from above.jpg

页面内容不支持其他语言。
这个文件来自维基共享资源
维基百科,自由的百科全书

Evitts_Creek_Aqueduct_C_and_O_Canal_from_above.jpg (700 × 525像素,文件大小:83 KB,MIME类型:image/jpeg


摘要

描述
English: Pic of canal prism, Evitts Creek Aqueduct near 180 mile mark. NPS site states: The Evitts Creek Aqueduct is the smallest of the aqueducts, constructed in 1840. The arch is segmented with a keystone has arch span clearance of 68'-11". Both granite and limestone are used for the structure, the arch ring is smooth cut and the remaining stone is textured. Although the coursing is mainly regular, some random coursing appears in the spandrals. The low arch rises 13'-4" above the spring line and the 88' face wall is terminated by a 4½ ' wide buttress. The buttress protrudes 4½' before the 23' long wingwalls at a 30° angle in order to help take the thrust of the arch. Walls parallel to the face wall continue from the end of the wings for about 22' to terminate the structure. The interior run of 99½' of aqueduct continues for another 30' at each end with cut stones. These stones angle out at about 30° for another 42' to regain the canal width. The interior aqueduct clearance is 20'°". The towpath wall is 8'-2" wide, and the berm 6' (both including coping overhang of a few inches). The flume of the aqueduct is 7' deep. Both up and down creek faces are similar. The down creek face of the towpath wall had a wrought iron railing, evidenced by holes in the stone that are similar to those for existing railings, but no railing survives.
来源 National park Service http://www.hscl.cr.nps.gov/insidenps/report.asp?STATE=&PARK=CHOH&STRUCTURE=&SORT=&RECORDNO=1114
作者 National Park Service, Department of the Interior, US Government

许可协议

Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.

说明

添加一行文字以描述该文件所表现的内容

此文件中描述的项目

描绘内容

版权状态 简体中文(已转写)

文件历史

点击某个日期/时间查看对应时刻的文件。

日期/时间缩⁠略⁠图大小用户备注
当前2013年6月11日 (二) 22:412013年6月11日 (二) 22:41版本的缩略图700 × 525(83 KB)Bonnachoven{{Information |Description ={{en|1=Pic of canal prism, Evitts Creek Aqueduct near 180 mile mark. NPS site states: The Evitts Creek Aqueduct is the smallest of the aqueducts, constructed in 1840. The arch is segmented with a keystone has arch span cl...

全域文件用途

以下其他wiki使用此文件:

元数据