| Abstract: | Maximum abutment-scour depths predicted with five different methods were compared to maximum abutment-scour depths observed at 100 abutments at 50 bridge sites in Maine with a median bridge age of 66 years. Prediction methods included the Froehlich/Hire method, the Sturm method, and the Maryland method published in Federal Highway Administration Hydraulic Engineering Circular 18 (HEC-18); the Melville method; and envelope curves. No correlation was found between scour calculated using any of the prediction methods and observed scour. Abutment scour observed in the field ranged from 0 to 6.8 feet, with an average observed scour of less than 1.0 foot. Fifteen of the 50 bridge sites had no observable scour. Equations frequently overpredicted scour by an order of magnitude and in some cases by two orders of magnitude. The equations also underpredicted scour 4 to 14 percent of the time. |
| Genre: | USGS Numbered Series |
| ProdID: | 86069 |
| Citation Author: | Lombard, Pamela J.; Hodgkins, Glenn A. |
| Citation Contributing Office: | USGS Maine Water Science Center |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | - |
| Citation Editor: | |
| Citation End Page: | |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | 0473000 |
| Citation LatS: | 0430000 |
| Citation LonE: | -0665500 |
| Citation LonW: | -0710500 |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | Y |
| Citation Phsyical Description: | iv, 24 p. |
| Citation Projection: | |
| Citation Public Comments: | Prepared in cooperation with the Maine Department of Transportation |
| Citation Publisher: | Geological Survey (U.S.) |
| Citation Series: | Scientific Investigations Report |
| Citation Series Code: | SIR |
| Citation Series Number: | 2008-5099 |
| Citation Search Results Text: | Comparison of Observed and Predicted Abutment Scour at Selected Bridges in Maine; 2008; SIR; 2008-5099; Lombard, Pamela J.; Hodgkins, Glenn A. |
| Citation Start Page: | |
| Citation Volume: | |
| Citation Year: | 2008 |
| Type: | citation/reference |
| Text: | Comparison of Observed and Predicted Abutment Scour at Selected Bridges in Maine; 2008; SIR; 2008-5099; Lombard, Pamela J.; Hodgkins, Glenn A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/sir_2008_5099.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/sir/2008/5099/ |
| Date Other: | Thu, 31 Jul 2008 00:00 -0500 |
| Publisher: | Geological Survey (U.S.) |
