NH175 over PEMIGEWASSET RIVER
Map
Coordinates:
+44.02199, -71.6819444°01'19" N, 71°40'55" W
Facts
Source: National Bridge Inventory. Information not verified; use at your own risk.
Name: | NH175 over PEMIGEWASSET RIVER |
Structure number: | 028401770014800 |
Location: | 0.05 MI FROM JCT RTE 3 |
Purpose: | Carries highway over waterway |
Route classification: | Minor Collector (Rural) [08] |
Length of largest span: | 171.9 ft. [52.4 m] |
Total length: | 183.1 ft. [55.8 m] |
Roadway width between curbs: | 24.0 ft. [7.3 m] |
Deck width edge-to-edge: | 30.8 ft. [9.4 m] |
Vertical clearance above deck: | 12.8 ft. [3.9 m] |
Owner: | State Highway Agency [01] |
Year built: | 1939 |
Historic significance: | Bridge is eligible for the National Register of Historic Places [2] |
Design load: | M 13.5 / H 15 [2] |
Main span material: | Steel [3] |
Main span design: | Arch - Thru [12] |
Deck type: | Open Grating [3] |
Wearing surface: | Other [9] |
Latest Available Inspection: November 2018
Good/Fair/Poor Condition: | Poor |
Status: | Open, no restriction [A] |
Average daily traffic: | 645 [as of 2017] |
Truck traffic: | 10% of total traffic |
Deck condition: | Poor [4 out of 9] |
Superstructure condition: | Poor [4 out of 9] |
Substructure condition: | Satisfactory [6 out of 9] |
Structural appraisal: | Meets minimum tolerable limits to be left in place as is [4] |
Deck geometry appraisal: | Basically intolerable requiring high priority of replacement [2] |
Water adequacy appraisal: | Equal to present minimum criteria [6] |
Roadway alignment appraisal: | Equal to present minimum criteria [6] |
Channel protection: | Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6] |
Scour condition: | Bridge foundations determined to be stable for the assessed or calculated scour condition. [8] |
Sufficiency rating: | 36.9 |
Recommended work: | Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31] |
Estimated cost of work: | $3,142,000 |
Previous Inspections
Date | Condition | Deck | Superstructure | Substructure | ADT | Suff. Rating |
---|
November 2018 | Poor | Poor | Poor | Satisfactory | 645 | 36.9 |
October 2017 | Poor | Poor | Poor | Satisfactory | 600 | 37.1 |
November 2016 | Poor | Poor | Poor | Satisfactory | 600 | 37.6 |
December 2015 | Poor | Poor | Poor | Satisfactory | 600 | 37.6 |
November 2014 | Poor | Poor | Fair | Good | 600 | 46.3 |
December 2013 | Poor | Poor | Fair | Good | 350 | 46.7 |
October 2012 | Fair | Satisfactory | Fair | Good | 350 | 49.7 |
November 2011 | Fair | Satisfactory | Fair | Good | 350 | 49.7 |
June 2009 | Fair | Satisfactory | Fair | Good | 400 | 49.6 |
June 2007 | Fair | Satisfactory | Fair | Good | 420 | 49.6 |
October 2003 | Fair | Satisfactory | Fair | Good | 360 | 49.7 |
June 2001 | Fair | Satisfactory | Fair | Good | 360 | 49.7 |
July 1999 | Fair | Good | Fair | Good | 360 | 50.7 |
September 1997 | Fair | Satisfactory | Fair | Good | 360 | 54.7 |
April 1995 | Fair | Satisfactory | Fair | Good | 360 | 53.4 |
May 1993 | Fair | Satisfactory | Fair | Good | 200 | 58.6 |
November 1991 | Fair | Satisfactory | Satisfactory | Satisfactory | 200 | 68.8 |