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NH175 over PEMIGEWASSET RIVER

Grafton County, New Hampshire

Map

Coordinates:
+44.02199, -71.68194
44°01'19" N, 71°40'55" W

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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

© Copyright 2012-20, James Baughn
Disclaimer: All data is taken from the National Bridge Inventory and has not been verified.
This page's URL is http://bridgereports.com/1363709