Bishop's Cap Box Culvert
Route 2
"Immediately east of Shepperd's Dell and Bishop's Cap is a 'box culvert' was built to take a small stream under the highway. An early photograph in Mershon's publication 'The Historic Columbia River Highway' shows the culvert soon after completion, with guard rocks at its top, lining the side of the highway. In 1995 a stone wall barrier, in 'historic style' was built around the culvert.
Lyn Topinka, http://columbiariverimages.com/Regions/Places/HCRH_route_crown_point_to_dodson.html
CS8. Structure: Masonry Culvert, No. 4529
Location: HMP 27.55
Date: 1914
Designer: Oregon State Highway Department
Builder: Pacific Bridge Co., Portland, and masons
Owner: Oregon Department of Transportation
This culvert consists of a single 8-foot reinforced-concrete deck slab span with masonry walls and floor.
Hadlow, Landmark Nomination, 18
NCS2. Structure: Masonry Culvert Barrier
Location: HMP 27.5
Date: 1995
Designer: Richard Fix, Oregon Dept. of Transportation
Builder: Richard Fix
Owner: Oregon Department of Transportation
This three-sided basalt masonry structure is just east of Shepperd’s Dell Bridge. It is of the slipfor grout-lock design with concrete caps and end posts. Its style blends well with the architectural elements of other structures associated with the CRH. The barrier prevents pedestrians and bicyclists from falling into a deep masonry culvert that diverts runoff under the roadway.
Hadlow, Landmark Nomination, 22