Roads of the Mid-South & West > Highways of the State of Illinois > Illinois State Routes 101-199 > Illinois State Route 170 > Illinois State Route 170, La Salle County

Illinois State Route 170
La Salle County

In La Salle County, Illinois State Route 170 runs just west of the La Salle/Grundy County line in the southeastern portion of the county.

The IL St Rt 170 river bridge at Seneca, is slated to be replaced. IDOT is looking to have the project in the 2007-2011 portion of the propsed highway improvemnet plan. It will take about two years to get the project started, depending on funs and readiness. The new bridge would replace the current one that was built in 1932. It would be east of the existing structure. The are no homes or business in the way of this porject. This bridge would conform with Coast Gaurd regulations. The intersects with IL St Rt 170, Du Pont Road, and River Road would be re-done. River Road would pass under IL St Rt 170 and intersect with Du Pont Road. Then a "T" intersects would be set-up with Du Pont and IL St Rt 170. A sidewalk is going to be included in the new bridge.*

IL St Rt 170 passes through the following towns in La Salle County.
Seneca

Ransom


New Illinois River Bridge @ Seneca, IL
August, 2008


Looking north at the eastside of the bridge from DuPont Road. (August, 2008)

NB IL St Rt 170 on the northside of the old bridge looking at the clearing for the new bridge. (August, 2008)

November, 2008

WB Du Pont Road near the work zone. (November, 2008)

Looking north at the new piers. (November, 2008)

Looking at the piers on the north side of the river. Photo from the old bridge. (November, 2008)

NB IL St Rt 170 on the northside of the river, next to the northern embankment.

February, 2009

WB LSCH 36/Du Pont Road east of IL St Rt 170.

Looking northwest at the first pier and the beams.

Looking at the bridge from IL St Rt 170 at the south end of the old bridge.

April, 2009

NB IL St Rt 170 coming into the valley. The new right-of-way is visable.

NB IL St Rt 170 at the temp. stop lights at Du Pont Road.

NB IL St Rt 170 on the south end of the old bridge.

NB IL St Rt 170 at the northside of the old bridge.
August, 2009

Looking west along DuPont Road at the future road be for DuPont Road.

WB DuPont Road at IL St Rt 170.

Looking north at the new bridge.

NB IL St Rt 170 crossing the old bridge and the new bridge is to the right.

October, 2009

WB Du Pont Road near the bridge.

NB IL St Rt 170 going down into the work zone.

NB IL St Rt 170 on the northside of the river.

SB IL St Rt 170 at the work zone.

May, 2010

Looking north at the work site from NB IL St Rt 170.

Looking north along the site from Dupont Road.

Looking at the bridge from a boat launch site east of the bridge.

July, 2010

Looking west at the Illinois River Bridge at Seneca.

February, 2011

Looking west at the Illinois River Bridge at Seneca.

SB IL St Rt 170 on the north side of the river.

SB IL St Rt 170 crossing the river.

SB IL St Rt 170 at Du Pont Road.

NB IL St Rt 170 near the bridge.

NB IL St Rt 170 on the south bank of the river.

NB IL St Rt 170 on the northside of the river.

Looking east along Du Pont Road from the new intersection with IL St Rt 170.

Looking east along River Road near IL St Rt 170.

Looking north along the river bridge from River Road.

IL St Rt 170 is not multi-plexed in La Salle County.

IL St Rt 170 intersects the following highway in La Salle County.
U.S. Rt. 6, at Seneca.



The northern end of IL St Rt 170 at U.S. Rt. 6 in Seneca.

The northern end marker. (Clicked picture)-Looking at the northern end.

The first SB guide marker on SB IL St Rt 170.

A junction marker on WB U.S. Rt. 6.

Looking south over Seneca, IL St Rt 170 in the center heading to the Illinois River Bridge.

NB IL St Rt 170 in Seneca.

Signs for the Illinois River at Seneca.

SB IL St Rt 170 near the Illinois River Bridge at Seneca.

Looking north at the Illinois River Bridge at Seneca.

SB IL St Rt 170 as is head out of the Illinois River Valley south of Seneca.

NB IL St Rt 170 south of Seneca.

NB IL St Rt 170 near Grand Ridge Road, south of Seneca.

SB IL St Rt 170 near Kinsman.

SB IL St Rt 170 south of Ransom.

NB IL St Rt 170 at the La Salle/Livingston County Line.

*Bridge to the future (Morris Daily Herald 13 May 2005)

9 August 2014