The Route No. 1 Overton-Lake Mead Road contributed significantly to National Park Service development of the Lake Mead National Recreation Area beginning in Stone masonry culvert headwalls along the road exemplify rustic style qualities specified by the National Park Service and adopted by the Bureau of Public Roads in the late for road features in national parks. Report Prepared By: Kurt Schweigert Associated Cultural Resource Experts (ACRE) Littleton, Colorado Date: September ROUTE NO. 1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No. NV-40-A Page 2 I. Description Route No. 1 Overton-Lake Mead Road (Route No.
1) was constructed in to provide access to Overton Beach, a recreation facility within the Boulder Dam Recreation Area (now the Lake Mead National Recreation Area). The documented portion of Route No. 1 extends from Overton Beach southwestward and then northwestward about 6.2 miles to the boundary of the Lake Mead National Recreation Area. The documented road segment includes 76 pipe culverts, 72 of which were built in as original features of the road and retain at least one stone-and-concrete masomy headwall.
A culvert is defined as "an enclosed channel serving as a continuation of and a substitute for an open stream wherever that stream meets an artificial barrier, such as a roadway embankment" (Armco The three general culvert types, based on the shape of the opening, are arched, box, and round or pipe culverts. The most economical type to install is the pipe culvert, often termed "common," which can be constructed with or without headwalls. Headwalls anchor the culvert pipe and protect the embankment from erosion (Armco Headwalls may be on the upslope or inlet end of the culvert, the outlet end, or both ends. All culverts within the recorded segment of Route No.
1 are pipe culverts, and all remaining original culverts had headwalls on both inlet and outlet ends (National Park Service Route No. 1 was constructed by the Bureau of Public Roads which developed specifications for four types of stone masomy headwalls for pipe culverts in (Bureau of Public Roads 1933a, Culvert headwalls within the recorded segment of the road conform to three of the four BPR standard masomy headwall types: straight, winged, and special. Two L-shaped headwalls (the fourth BPR standard type) were shown on the plans for Route No. 1, but neither of the L-shaped headwalls appears to have been constructed. All original headwalls along Route No.
1 are oriented with long axis parallel to the road edge, but some culverts were skewed to follow drainage channels that are not perpendicular to the road centerline, so that the outlet headwalls of some culverts are not directly across the road from the inlet headwalls. One hundred thirty-eight rubble stone masomy headwalls are known to exist within the documented segment of Route No. 1, and at least three additional headwalls may be entirely buried. Many of the recorded headwalls are partly buried, and one culvert is within an extremely dangerous erosion setting, so that accurate measurement of one or more dimensions of some headwalls is not available. II. Architectural and Engineering Information Straight Headwalls Straight headwalls are the simplest and most prevalent type on Route No.
1 (67 headwalls); these structures each have a rectangular-shaped face with a single culvert pipe encased near the bottom-center of the headwall. Straight headwalls range from 40" to 97" long average for 65 headwalls measured for length). Tops of straight headwalls average in width, and range from 10" to 21" in width (58 headwalls measured for width). Sixty- four measured straight headwalls range from 14" to 54" and average in height. However, the height for all headwalls was measured from the lowest visible extent of the headwall to the top of the headwall, and the bottoms of most headwalls are buried to varying extent.
Fully or nearly-fully exposed straight headwalls range in height from 36" to with height generally proportional to the length of the wall and/or relative size and sharpness of incision of the drainage channel served by the culvert. The straight headwalls serve relatively small culverts, either 18" or 24" diameter steel or clay tile pipes. Recorded information for Route No. 1 straight and special style headwalls is presented in Table 1 below. ROUTE NO. 1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No. NV-40-A Page 3 Special Headwalls Forty-nine special type stone masonry headwalls exist within the documented portion of Route No. 1.
Special headwalls have a flat face and differ from straight headwalls primarily by having a stone-and-concrete footing that extends outward slightly from the base of the headwall face. Special headwalls were used for both inlet and outlet ends of culverts, but the additional support provided by the footing was especially needed on the outlet ends of culverts. Thirty-five of the 49 documented special headwalls are located on the outlet or down slope ends of culverts. Like straight headwalls on Route No. 1, special headwalls anchor relatively small steel and clay tile culvert pipes of 18" and 24" diameter.
Special headwalls range from 40" to 94" long average for 47 measured special headwalls), 12" to 22" wide at top average for 40 headwalls), and 12" to 52" high from lowest visible level to top of headwall average for 47 headwalls measured). Most special headwalls are partly buried; three fully-exposed special headwalls are and 45" high respectively from bottom of footing to top of headwall. One special outlet headwall has a small area of poured concrete down slope from the headwall; this concrete may represent a small run-off apron or simply a dump of waste concrete left over from construction of the headwall. Special type headwalls are listed in Table 1 below. Winged Headwalls Twenty-two original stone-masonry winged headwalls are within the documented portion of Route No. 1.
Similar to straight headwalls, winged headwalls have a flat face that anchors culvert pipes, but winged headwalls also have two oblique walls or wings that direct water flow and help prevent slope erosion. Winged headwalls are primarily located on relatively wide drainage channels, and winged headwalls serve double-pipe culverts at three locations. Culvert pipes in winged headwalls are larger than those in straight headwalls and most special headwalls; steel and clay tile pipes anchored by winged headwalls range from 30" to 48" in diameter. Winged headwalls are the largest headwall structures on Route No. 1.
Straight sections of winged headwalls range from 60" to long average for all 22 winged headwalls), from 13" to 20" wide at top average for 16 measured headwalls), and 36" to 66" high average for 21 measured headwalls). Headwall wings step down away from the straight sections; headwall wings range from 32" to 76" long average for 21 measured wings), 25" to 52" high average for 20 measured wings), and are the same width as the adjoining straight sections. At eight locations, winged outlet headwalls have run-off aprons that extend down slope from the headwalls to protect the headwalls from erosion under-cutting. The stone and concrete aprons range from 35" to long average for 8 aprons) and 26" to wide average for 8 aprons).
Table 2 below contains information on winged headwalls and associated aprons. All of the stone masonry headwalls were constructed oflocally obtained stone that was quarry-finished into blocks or slabs of various sizes. Stone was laid with concrete mortar, joints were tucked, and the headwalls were completed without distinct caps. Stone for the headwalls was obtained from an initial quarry at an unknown location and a second quarry in the Valley of Fire (Cassell and slight variation exists among headwalls constructed of stone from the two quarries. Stone from the initial quarry is mostly limestone typically cut into nearly square block shapes. Stone from the Valley of Fire quarry is dark red sandstone typically cut into slabs that are narrower than the blocks from the initial quarry.
From Overton Beach southwestward about 1.5 miles, headwalls are mostly limestone from the initial quarry. From 1.5 miles to 2.3 miles southwest of Overton Beach, headwalls contain a mixture of stone from both quarries, and headwalls from the latter point to the end of the documented segment of Route No. 1 contain only red sandstone from the Valley of Fire quarry. The sandstone headwalls have more clearly defined layers of stone than do the headwalls with limestone or mixed stone, and the sandstones are generally long and narrow, giving the headwalls a more finished appearance. Sandstone is set so that striations are both horizontal and vertical in different stones of the some headwalls. The ROUTE NO.
1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No. NV-40-A Page4 sandstone weathered more easily than the stone of the quarry. The headwalls on the south or upslope side of the road in the badlands area near the near Overton Beach are the most highly eroded; in some headwalls the soft sandstone has eroded significantly, leaving extruding mortar seams and giving the headwall a honey-combed appearance. Pipes in 64 original culverts are corrugated steel sections in diameters from 24" to Sixty-one of these culverts have single pipes, and three culverts have two pipes anchored by winged and special headwalls. Steel pipes installed in had a bituminous (tar) coating which is still evident on some exposed steel pipes.
Eight consecutive culverts have vitrified clay tile pipes. Seven of the latter culverts have single, 18" diameter pipes, and the eighth culvert has two 30" diameter tile pipes anchored by winged headwalls. The clay tile pipes are indicated on original plans for the road but the reason for using clay tile pipes instead of steel pipes is not indicated in the plans. The segment of the road containing the clay tile pipes is not significantly different from other segments where steel pipes were installed. At least 16 stone masonry headwalls have been removed or buried since 193 8. Several of these changes occurred in February or early March as a result ofrecord rainfall and flooding, which resulted in need to stabilize the road grade in areas and to replace some culverts.
However, at the extreme eastern end of the recorded segment of Route No. 1 near Overton Beach, two culverts were entirely replaced and a third partly replaced prior to the flooding episode. Original stone headwalls known to have been removed or replaced since are listed in Table 3 below. If built according to the 193 7 plans, one additional culvert has been removed from a location near the intersection of the Overton Beach Access Road and North Shore Road; this area now has multiple culvert pipes beneath a rebuilt segment of highway that originally was served by a low-water crossing. III. Historical Information All of the stone masonry culvert headwalls were constructed in by a contractor for the Bureau of Public Roads. Construction of Route No.
1 is extensively discussed in the Historical Data section ofHAER-NV-40. IV. Project Information This documentation has been prepared at the request of the National Park Service, Lake Mead National Recreation Area. In NPS and the Nevada State Historic Preservation Office (NV-SHPO) agreed that repair or maintenance could adversely affect historic drainage structures along Route No. 1. A Memorandum of Agreement (MOA) between NPS and NV-SHPO stipulated that HAER documentation would be accomplished for features along Route No. 1 prior to reconstruction of the road. This HAER documentation partially fulfills requirements of the MOA.
This documentation was accomplished by Associated Cultural Resource Experts (ACRE) under provisions of a task order issued by the National Park Service to Scientific Applications International Corporation (SAIC). Kurt P. Schweigert of ACRE was Principal Investigator and prepared the second draft and final documentation packages. Douglas M. Edwards and Kurt P. Schweigert of ACRE were the photographers, and Peggy Beedle of ACRE accomplished most of the research and initial field documentation. Melissa Johnson of ACRE assisted in field documentation and photography. Field documentation and photography were accomplished in February and February This documentation was based in part on three previous field surveys of drainage features and survey monuments along Route No.
1 (Daron Blalack Federal Highway Administration Lake Mead National Recreation Area staff provided copies of plans for Route 1 and other materials. Additional information was obtained from the National Park Service Technical Information Center in Denver, Colorado; Special Collections at the Lied Library at the University of Nevada-Las Vegas; and the National Archives in College Park, Maryland. ROUTE NO. 1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No. NV-40-A Page 5 Boulder City, Nevada historian Dennis McBride provided a newspaper index on road articles from local newspapers, V. Sources Armco Drainage & Metal Products, Inc. Handbook of Culvert and Drainage Practice.
Middletown, Ohio: Armco Drainage & Metal Products, Inc., Blalack, JoAnn Overton Beach Road Survey of Route 1 Overton-Lake Mead Highway Station Markers. National Park Service, Western Archeological and Conservation Center, Tucson, Arizona. Cassell, J. T. Final Construction Report, Grading and Bituminous Treated Surfacing on Section A of Route 1 Overton-Lake Mead Boulder Dam Recreational Area Clark County, Nevada. Daron, Steven E. Replacement of a Culvert Along Overton Beach Access Road, Lake Mead National Recreation Area, Clark County, Nevada. Submitted to Lake Mead National Recreation Area, Boulder City, Nevada. WACC Project# LAME Federal Highway Administration Report on Existing Headwalls Built by the Civilian Conservation Corps circa Northshore Road and Overton Beach Road.
Lake Mead National Recreation Area, Nevada Projects PRA- LAME & PRA-LAME Prepared by the Department of Transportation, Federal Highway Administration, Central Federal Lands Highway Division, Denver, Colorado. VI. Reduced Copies of Measured Drawings United States Department of Agriculture 1933a Standard Cement Stone Masonry Headwalls for Pipe Culverts. Bureau of Public Roads, District No. 2, San Francisco, California. On file at National Park Service, Lake Mead National Recreation Headquarters, Boulder City, Nevada. Special Cement Stone Masonry Headwalls for Pipe Culverts. Bureau of Public Roads, District No. 2, San Francisco, California. On file at National Park Service, Lake Mead National Recreation Headquarters, Boulder City, Nevada. ROUTE NO.
1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No. NV-40-A Page 6 Table 1: Straight and Special Type Culvert Headwalls on Route No.1 Overton-Lake Mead Road Feature Feature Headwall Other Pipes Pipe Pipe Condition UTM UTM Height Width Length # Type Information Mat.* Diam Easting Northing (inches) (inches) (inches) 6 Culvert Straight Mostly Single CM 18" Fair NIA NIA 97 Inlet buried 6 Culvert Special Buried, not Single CM 18" Fair NIA NIA NIA Outlet measured 7 Culvert Straight Mostly Single CM 18" Fair 27 NIA 66 Inlet buried 7 Culvert Special Partly Single CM 18" Good 31 NIA 60 Outlet buried; riprap below headwall 9 Culvert Straight Partly Single CM 24" Good 32 14 75 Inlet buried.
9 Culvert Special Fully Single CM 24" Good 45 19 83 Outlet exposed 10 Culvert Straight Mostly Single CM 18" Good 27 NIA 60 Inlet buried 10 Culvert Special Fully Single CM 18" Good 37 18 64 Outlet exposed 12 Culvert Straight Partly buried Single CM 18" Good 27 10 69 Inlet 12 Culvert Special Single CM 18" Good 36 20 69 Outlet 14 Culvert Special Single CM 18" Good 36 19 59 Outlet 15 Culvert Straight Partly buried Single CM 18" Good 24 16 60 Inlet 15 Culvert Special Single CM 18" Good 37 17 52 Outlet 18 Culvert Straight Partly buried Single CM 18" Fair 21 NIA 66 Inlet 18 Culvert Special Partly buried Single CM 18" Good 34 13 62 Outlet 23 Culvert Straight Single CM 18" Fair 28 16 64 Inlet 23 Culvert Special Single CM 18" Good 36 20 53 Outlet 24 Culvert Straight Partly buried Single CM 18" Poor 28 16 60 Inlet 24 Culvert Special Fully Single CM 18" Good 36 16 58 Outlet exposed 26 Culvert Straight Single CM 18" Fair 24 15 62 Inlet ROUTE NO.
1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No.
NV-40-A Page 7 Table 1: Straight and Special Type Culvert Headwalls on Route No.1 Overton-Lake Mead Road Feature Feature Headwall Other Pipes Pipe Pipe Condition UTM UTM Height Width Length # Type Information Mat.* Diam Easting Northing (inches) (inches) (inches) 26 Culvert Special Single CM 18" Good 22 17 51 Outlet 28 Culvert Straight Single CM 18" Fair 25 17 57 Inlet 28 Culvert Special Halfburied Single CM 18" Good 48 19 40 Outlet 29 Culvert Straight Single CM 18" Good 27 16 60 Inlet 29 Culvert Special Single CM 18" Good 40 20 60 Outlet 30 Culvert Straight Single CM 18" Fair 29 16 72 Inlet 30 Culvert Special Single CM 18" Good 34 17 53 Outlet 31 Culvert Straight Single CM 24" Fair 35 16 73 Inlet 31 Culvert Special Single CM 24" Good 36 18 76 Outlet 32 Culvert Straight Single CM 18" Fair 22 17 63 Inlet 32 Culvert Special Half buried Single CM 18" Fair 31 17 54 Outlet 33 Culvert Straight Partly buried Single CM 18" Good 24 NIA 84 Inlet 33 Culvert Straight Single CM 18" Good 35 20 61 Outlet 34 Culvert Special Partly buried Single CM 18" Fair 28 22 82 Inlet 34 Culvert Special Single CM 18" Fair 26 15 61 Outlet 36 Culvert Special Single CM 18" Good 34 18 59 Outlet 38 Culvert Straight Single CM 18" Fair 14 16 63 Inlet 38 Culvert Special Single CM 18" Good 33 14 56 Outlet 39 Culvert Straight Single CM 24" Good 26 16 81 Inlet 39 Culvert Special Single CM 24" Good 41 17 84 Outlet 41 Culvert Straight Single CM 24" Good 37 17 79 Inlet 41 Culvert Special Single CM 24" Good 33 18 73 ROUTE NO.
1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No. NV-40-A Page 8 Table 1: Straight and Special Type Culvert Headwalls on Route No.
1 Overton-Lake Mead Road Feature Feature Headwall Other Pipes Pipe Pipe Condition UTM UTM Height Width Length # Type Information Mat.* Diam Easting Northing (inches) (inches) (inches) Outlet 42 Culvert Straight Single CM 18" Fair 32 18 55 Inlet 42 Culvert Straight Single CM 18" Good 34 16 57 Outlet 44 Culvert Special Partly buried Single CM 18" Fair 26 17 60 Inlet 44 Culvert Straight Partly buried Single CM 18" Fair 30 16 52 Outlet 46 Culvert Straight Single CM 18" Fair 33 19 40 Inlet 46 Culvert Straight Single CM 18" Good 34 16 53 Outlet 48 Culvert Straight Single CM 24" Fair 31 17 77 Inlet 48 Culvert Straight Single CM 24" Good 38 17 76 Outlet 52 Culvert Straight Single CM 18" Good 35 20 58 Outlet 56 Culvert Straight Single CM 18" Fair 27 17 63 Inlet 56 Culvert Special Riprap Single CM 18" Good 33 17 57 Outlet above headwall 58 Culvert Straight Single CM 24" Good 31 19 80 Inlet 58 Culvert Special Riprap Single CM 24" Poor 40 18 74 Outlet above and below headwall 60 Culvert Straight Single CM 24" Fair 23 20 80 Inlet 60 Culvert Special Single CM 24" Good 52 22 81 Outlet 63 Culvert Straight Single CM 24" Fair 38 23 77 Inlet 63 Culvert Straight Single CM 24" Fair 52 21 77 Outlet 66 Culvert Straight Single CM 18" Poor 31 16 42 Inlet 66 Culvert Straight Single CM 18" Fair 26 21 56 Outlet 73 Culvert Special Single CM 18" Poor 24 14 58 ROUTE NO.
1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No. NV-40-A Page 9 Table 1: Straight and Special Type Culvert Headwalls on Route No.
1 Overton-Lake Mead Road Feature Feature Headwall Other Pipes Pipe Pipe Condition UTM UTM Height Width Length # Type Information Mat.* Diam Easting Northing (inches) (inches) (inches) Inlet 73 Culvert Special Single CM 18" Fair 12 17 66 Outlet 74 Culvert Straight Single CM 24" Poor 36 17 70 Inlet 74 Culvert Straight Single CM 24" Fair 38 17 80 Outlet 76 Culvert Straight Single CM 24" Fair 36 20 76 Inlet 76 Culvert Straight Single CM 24" Fair 30 19 82 Outlet 78 Culvert Special Single CM 24" Fair 34 18 77 Inlet 78 Culvert Straight Single CM 24" Fair 38 17 78 Outlet 79 Culvert Straight Single CM 24" Fair 24 14 60 Inlet 79 Culvert Straight Broken up; Single CM 24" Poor 34 13 53 Outlet apron remnant 83 Culvert Straight Single CM 24" Fair 34 17 81 Inlet 83 Culvert Straight Single CM 24" Fair 26 17 82 Outlet 86 Culvert Straight Single CM 24" Fair 39 21 80 Inlet 86 Culvert Straight Single CM 24" Good 36 19 84 Outlet 91 Culvert Straight Single CM 24" Poor 39 19 58 Inlet 91 Culvert Straight Single CM 24" Good 33 18 81 Outlet 92 Culvert Straight Single CM 24" Fair 36 18 79 Inlet 92 Culvert Straight Single CM 24" Good 40 18 79 Outlet 96 Culvert Straight Single CM 24" Fair 39 18 81 Inlet 96 Culvert Straight Single CM 24" Fair 43 19 77 Outlet 99 Culvert Straight Single CM 24" Fair 38 20 82 Inlet 99 Culvert Straight Single CM 24" Good 37 18 78 ROUTE NO.
1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No.
NV-40-A Page 10 Table 1: Straight and Special Type Culvert Headwalls on Route No.1 Overton-Lake Mead Road Feature Feature Headwall Other Pipes Pipe Pipe Condition UTM UTM Height Width Length # Type Information Mat.* Diam Easting Northing (inches) (inches) (inches) Outlet 102 Culvert Straight Single CM 24" Fair 37 18 78 Inlet 102 Culvert Straight Single CM 24" Fair 54 21 80 Outlet 105 Culvert Straight Single CM 18" Good 32 18 63 Inlet 105 Culvert Straight Single CM 18" Good 32 20 56 Outlet 106 Culvert Straight Buried; not Single CM 18" Fair NIA NIA NIA Inlet measured 108 Culvert Straight Buried; not Single VT 18" Fair NIA NIA NIA Inlet measured 108 Culvert Straight Clay tile Single VT 18" Good 32 19 61 Outlet culvert 109 Culvert Special Buried; not Single VT 18" Fair NIA NIA NIA Inlet measured 109 Culvert Special Single VT 18" Good 31 18 62 Outlet 110 Culvert Straight Single VT 18" Good 46 17 50 Inlet 110 Culvert Straight Single VT 18" Good 29 18 54 Outlet 111 Culvert Special Single VT 18" Fair 25 12 61 Inlet 111 Culvert Special Single VT 18" Good 31 12 62 Outlet 112 Culvert Straight Partly buried Single VT 18" Fair 26 NIA 54 Inlet 112 Culvert Straight Partly buried Single VT 18" Fair 30 NIA 62 Outlet 114 Culvert Special Single VT 18" Fair 32 15 62 Inlet 114 Culvert Special Single VT 18" Fair 32 19 64 Outlet 116 Culvert Special Partly buried Single VT 18" Fair 21 NIA 64 Inlet 116 Culvert Special Single CM 18" Good 38 18 62 Outlet J 120 Culvert Special Partly buried Single CM 18" Fair 21 NIA 60 Inlet ROUTE NO.
1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No. NV-40-A Page 11 Table 1: Straight and Special Type Culvert Headwalls on Route No.
1 Overton-Lake Mead Road Feature Feature Headwall Other Pipes Pipe Pipe Condition UTM UTM Height Width Length # Type Information Mat.* Diam Easting Northing (inches) (inches) (inches) 120 Culvert Special Single CM 18" Good 25 16 58 Outlet 121 Culvert Special Partly buried Single CM 18" Fair 24 NIA 61 Inlet 121 Culvert Special Partly buried Single CM 18" Fair 25 NIA 60 Outlet 124 Culvert Special Partly buried Single CM 24" Good 24 NIA 76 Inlet 124 Culvert Special Single CM 24" Good 46 22 82 Outlet 125 Culvert Special Mostly Double CM 18" Fair 21 NIA 49 Inlet buried 125 Culvert Special Partly buried Double CM 18" Fair 29 14 94 Outlet 127 Culvert Special Single CM 24" Fair 34 21 76 Inlet 127 Culvert Special Single CM 24" Fair 50 22 77 Outlet 129 Culvert Special Single CM 18" Good 27 18 64 Inlet 129 Culvert Special Single CM 18" Poor 40 15 60 Outlet AA Culvert Straight Partly buried Single CM 18" Good 25 13 62 Inlet AA Culvert Straight Fully Single CM 18" Good 38 15 51 Outlet exposed * CM is corrugated metal, VT is vitrified clay tile.
ROUTE NO. 1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No. NV-40-A Page 12 Table 2: Winged Type Stone Masonry Culvert Headwalls on Route No. 1 Overton-Lake Mead Road Feat. Feature Other Pipes Pipe Pipe Cond. UTM Height Width Length Wing Wing Apron Apron # Information Mat. Diam.
(inches) (inches) (inches) Length Height Length Width 11 Culvert Partly buried Single CM 42" Good 52 NIA 64 45 42 NIA NIA Inlet 11 Culvert Partly buried Single CM 42" Good 52 NIA 78 43 NIA NIA NIA Outlet 17 Culvert Partly buried Single CM 30" Good 36 NIA 65 36 26 NIA NIA Inlet 17 Culvert Apron Single CM 30" Fair NIA NIA NIA 27 NIA 35 55 Outlet 19 Culvert Double large Double CM 48" Fair 56 13 144 67 47 NIA NIA Inlet culverts 19 Culvert Mostly Double CM 48" Good 57 NIA 189 55 51 72 189 Outlet exposed; double apron 50 Culvert Single CM 36" Fair 48 16 86 34 32 NIA NIA Inlet 50 Culvert Apron Single CM 36" Fair 48 17 82 34 38 89 41 Outlet Collapsed 69 Culvert Single CM 30" Fair 36 17 68 48 29 NIA NIA Inlet 69 Culvert Single CM 30" Poor 44 17 60 48 32 84 44 Outlet 87 Culvert Double CM 48" Poor 42 20 168 48 46 NIA NIA Inlet 87 Culvert Double CM 48" Poor 66 19 164 55 55 NIA NIA Outlet 97* Culvert Buried or Single CM 48" NIA 56 15 84 50 32 NIA NIA Inlet Removed 97* Culvert Buried or Single CM 48" NIA 56 15 88 NIA NIA NIA NIA Outlet Removed 113 Culvert Half buried Double VT 30" Fair 40 20 132 16 32 NIA NIA Inlet 113 Culvert Apron Double VT 30" Fair 48 17 143 36 36 150 26 Outlet collapsed; gutter destroyed and scattered by recent flood 126 Culvert Single CM 42" Good 48 16 76 53 25 Inlet ROUTE NO.
1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No. NV-40-A Page 13 Table 2: Winged Type Stone Masonry Culvert Headwalls on Route No. 1 Overton-Lake Mead Road Feat. Feature Other Pipes Pipe Pipe Cond. UTM Height Width Length Wing Wing Apron Apron # Information Mat. Diam. (inches) (inches) (inches) Length Height Length Width 126 Culvert Apron Single CM 42" Good 48 15 80 54 40 112 50 Outlet 128 Culvert Single CM 30" Fair 42 14 64 76 34 Inlet 128 Culvert Apron Single CM 30" Good 38 16 68 48 30 100 40 Outlet 131 Culvert Single CM 36" Fair 42 15 68 34 62 Inlet 131 Culvert Apron Single CM 36" Good 46 15 77 58 36 96 52 Outlet CM= Corrugated Metal VT= Vitrified Tile * Feature 97 was recorded in but was buried or removed by March ROUTE NO.
1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No.
NV-40-A Page 14 Table 3: Stone Masonry Headwalls Removed or Buried Since Feature Feature Headwall Current Other Information UTM UTM # Type Material Easting Northing 1 Culvert Inlet Other Concrete Non-original 1 Culvert Outlet Other Concrete Non-original 2 Culvert Outlet None NIA Eitl1er removed or buried 3 Culvert Inlet Other Concrete Non-original concrete catch structure and steel flange inlet 3 Culvert Outlet None Steel Non-original steel flange outlet 14 Culvert Inlet NIA Buried or removed, not measured 36 Culvert Inlet None Steel Inlet replaced with U-shaped steel structure 52 Culvert Inlet None NIA Buried or removed, not measured 67 Culvert Inlet Other Steel Replaced recently with flanged steel structure, new pipe 67 Culvert Outlet Other Steel Replaced recently with flanged steel structure, new pipe 70 Culvert Inlet None Steel Replaced recently with U-shaped steel inlet; not measured 70 Culvert Outlet None None Bare pipe outlet only, no headwall 97* Culvert Inlet Winged CSM Recently buried or removed; upslope area is now a catch basin with no culvert 97* Culvert Outlet Winged CSM Recently buried or removed 106 Culvert Outlet None None Replaced with bare pipe * Recorded m removed or buried by March ROUTE NO.
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EL.CVATION CIOUBLC PIPI: ~ i-r- ii t ' -STJlAiGHT 'ivPE HCADWAL\}$ - Str:noN M\ S'TRUTT.fNG OCTAL ~ $ett.,-.~.. I ; , GENERAL HO'TU t.. .. . ' r -V ~~,US.& .eurl~~ \ - ' ~i : f \( , r-r.R.~-i,~ L' ' I - W f,~~bt5e.tWifft~udi!d _unterfn::llJ.,~ofM" .. _. ' . i . Sktti!d~,~W~be~ bh!haasrtifweaurfwdltlor ~h~t1iW.~-..ir'l*P'f"'- ,- -~ ' SE.CTtON A-A 5ca1e, ... .. r..o QQl!lntffin~illt#esrtr.-!~ ~ LI~i~ ~fdbfldi~tiylhttrigmoc,,". wllfla.ls~,irm~i J .~::~~:i - ~ptllt$ur~~tl'C~ ~ Tl PLAN n.-""HllvVlh,-pipec~~- se,,1t- .. r-o C:l:ffleltl S1tane ~ ,.':t'ai l:e 0 ~ e; st.CT!ON C .. C ); f O" [~ (1) ~~JO!Jeut:.- - g, 8 Pl r' "L" TYPE H.tMW.A.l..L ~-It -~Qlod'. S<: .. , o STANMRP CEMENT STONE MASONRY HEADWAU.S FOR P!PE CULVERTS. 0 tr1 < ~ ~"' - -- .
>-3 -~: 0 C/1 ~~> tr1 ra ~ g.~ United States Department of Agriculture, Bureau of Public Roads ~~> n tl Z District No. 2, San Francisco, California >-c f)l ~ Pl ~"' > Standard Cement Stone Masonry Headwalls for Pipe Culverts, No. (Jq ~ GO o, - i:,,r' ' > 0.. C/1 ROUTE NO. 1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road HAER No. NV-40-A Page20 -, I ~<I(; I I ~ ~ j I I ~, l ii. ~ :1 I \.i .,, :f i ir ... w~ >,- ll i' ,J og I w 111 l flI . . llj tr . Q. Ht tl :,ii a: '~ Ii..; j ), ~l l 1! i I 1 lliJ ~ I t:j I ii! l!~ ~l 1 ~ I l j!l l I -~ d u - ..J I . i .., .. i ~ . ~ !:I :u :s. "' a ii:o.. <u~ d < h ti,~1t1jl lli ~ o- fJ . ~. t ~ .g I!.. .g d &o] ~ I~, 1tl r , ,~t ~. l Ji! l1i~ti . -~" ] ~ 1.: I t~ I~ I~ __ 1r- ~ c~ u fl .ft 1 .
~j ~ = ,_ ::E bJ) ..c :u i A (} ~~l ... ~ c: = 0 <l) - ...I -d E: t; :u tCU !r "O ti! u 0.. er., :J I~ :iI~ I Ill; I;j t.J t ! I - ..I ~.'i._'t, ::t ~I ill ROUTE NO. 1 OVERTON-LAKE MEAD ROAD, CULVERTS AND HEADWALLS (Northshore Road, Overton Beach Access Road) HAER No. NV-40-A Page 21
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