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Reed Hollinshead
ITD Office of Communication
(208) 334-8881

Southwest Idaho highway construction report for Sept. 7-14

BOISE - The following projects in southwest Idaho are now under way.

BOISE - Idaho 16 Extension

Work is under way for the first phase of the extension of Idaho 16, which will be complete in August 2014.

Crews will connect State Street to Chinden Boulevard, including a new bridge over the Boise River.

Crews are driving pile and building access roads.

Concrete Placing Co. Inc., of Boise, is the contractor on this $19.4 million project.

BOISE - Idaho 16, Phyllis Canal Bridge and South Segment

This project extends Idaho 16 from U.S. 20/26 (at McDermott Road) to Joplin Road, where it ties in to the new Idaho 16 Boise River Bridge project.

The preconstruction conference was held on Aug. 21. The contractor has just turned in their environmental documents for review. After any review, comments are addressed, and the contractor has a 14-day waiting period required by the EPA before any ground-disturbing activities can take place.

Work is expected to begin soon on the first phase of the project, to demolish two existing structures that clear the way for the new roadway alignment. These are two houses (already abandoned and cleared) that are in the way of the new alignment. One is on Joplin Road and the other is on Idaho 16, about one-quarter mile north of the Idaho 16/44 intersection.

Almost all work will be restricted to daylight hours, with the exception of activities like hauling bridge girders. 

The overall completion date is in August 2014.

Concrete Placing Co Inc. is the contractor on this $10.8 million project.

BOISE – Connector resurfacing

A preventative maintenance project began July 29 on the Connector (I-184) in Boise, heading westbound. Work is expected to be finished by mid-September.

For about five miles, from the Flying Wye to 13th Street, crews will re-seal joints and grind off the concrete surface to increase skid resistance.

Crews will adhere to a 10 p.m.-to-5 a.m. schedule, working overnight in order to minimize traffic interference.

Work will not be allowed on the nights of Boise State University home football games.

A temporary closure of the ramps will be necessary for the contractor to properly grind and re-seal in those areas.

The speed limit will be reduced to 45 mph in the construction zone. 

Grinding is expected to be completed by Sept. 10.  Crews are working seven days per week to finish on time. Once all grinding is done, restrictions will only apply to one direction.

Joint resealing was postponed for a few days while the contractor addressed dust problems. They are switching to “wet” saws and water blasting the joints, which will require a vacuum broom to remove the water and slurry generated. The joint-resealing operation should be completed by about Sept. 30. 

Penhall Corporation, of Anaheim, Calif., is the contractor on this $919, 000 project.

MERIDIAN - Eagle Road resurfacing and medians

Work started June 10 on this project, which will resurface Idaho 55 from Fairview Avenue in Meridian to State Street in Eagle, and install raised medians from Franklin to Oakhampton Drive, one-half mile north of Chinden Boulevard.

ITD is in the process of constructing the second phase of improvements from River Valley Street to Chinden Boulevard.

One northbound lane on Eagle Road from River Valley Street to Hobble Creek will be closed at night so crews can pave the roadway.

Between 9 p.m. and 5 a.m. one lane will remain open in each direction.

•  At nighttime only, access will be limited to neighborhoods and businesses along Eagle Road between River Valley Street and Hobble Creek.
•  There will be approximately 15-minute delays at both the Ustick Road and McMillan Road intersections.
•  Please use alternate routes to avoid Eagle Road during the nighttime lane closures if you live in the area.
•  Flaggers will direct traffic and help drivers find alternate routes to their homes and businesses.

Crews will finish paving this section of Eagle Road by late September.

Idaho Sand & Gravel Co., of Nampa, is the contractor on this $4.7 million project.

Repair of seven bridge decks

The repair and resurfacing of bridge decks on seven bridges from Boise through Mountain Home and to the east is entering its final month.

The contractor has completing all work on the Canyon Creek overpass at milepost 92, 18th Street overpass at milepost 94, Hwy 95 Interchange at U.S. 20, the Oregon Trail Interchange at milepost 99, and Hammett Interchange at milepost 112.

The Mayfield Interchange bridge at milepost 71 on I-84 will be closed overnight to allow the bridge deck to be jacked up and shimmed. While jacking the superstructure, I-84 will be reduced to a single lane and traffic diverted around using the on- and off-ramps. Flaggers will be used to assure smooth traffic flow.

The superstructure will be shimmed up, (approximately three-quarters inch) for up to a week to allow repair work on the substructure.

Work will begin Tuesday (Sept. 11), and crews anticipate completing work around Oct. 8, Columbus Day.

This structure will require some nighttime bridge closures for jacking the superstructure up to replace bearing pads and repairs to pier caps and girders, followed later with traffic reduced to a single lane and temporary signals to resurface the deck and replace joints.

The bridges under this contract, their ages and the work is detailed below:

•  The east- and westbound U.S. 20 Interchange at Exit 95 (1971) – This work involved removing and replacing the deck concrete, replacing expansion joints, and injecting filler in cracks in the abutments and wing walls.

• The East Mountain Home/Oregon Trail Interchange at milepost 99 (1972) - This work involved removing and replacing concrete, replacing expansion joints, and injecting filler in cracks in the piers and wing walls.

• The Eisenman Interchange bridge at Exit 60 (1997) – The bridge deck received an epoxy overlay (deck seal).

• The Mayfield Interchange bridge east of Boise at Exit 71 (1960) – This work involved removing and replacing the deck concrete, replacing bearing pads on the piers and replacing the expansion joints.

• The Canyon Creek underpass in Mountain Home at milepost 92 (1971) – This work involved removing and replacing the deck concrete and replacing expansion joints.

•  The 18th Street underpass in Mountain Home at milepost 94 (1971) – This work involved removing and replacing the deck concrete, replacing expansion joints, and injecting filler in the cracks in pier walls.

•  The Hammett Interchange bridge at milepost 112 (1973) – This work involves removing and replacing concrete, replacing expansion joints, and injecting filler in cracks in the piers and wing walls.

Concrete Placing Co. Inc., of Boise, is the apparent low bidder on the $1.72 million repairs.

U.S. 95 resurfacing Smokey Boulder – Hazard Creek

A five-and-a half-mile (milepost 171-176.5) pavement rehabilitation project on a stretch of U.S. 95 that wanders through Adams and Idaho counties as it heads north is due to begin when the contractor finishes work on Idaho 55 near Banks.

One open lane will be maintained from Smokey Boulder Road to Hazard Creek during the two-month-long project. Flaggers and traffic cones will be used to guide motorists. Pilot cars will guide traffic during pavement pulverization and paving.

Guardrail removal and curb removal resumed Wednesday (Sept. 5). A test asphalt strip is planned today (Friday, Sept. 7)). Production paving is planned to begin next week.

Valley Paving & Asphalt Inc., of Cottonwood, Idaho, is the contractor on this $1.8 million project.

BANKS – Resurfacing

A 10.4-mile resurfacing project on Idaho 55 north of Banks from milepost 80.6 to the Boise National Forest boundary (milepost 91) is wrapping up.

Occasional daytime work will be needed for paving approaches and turnouts, applying rumble strips and pavement markings near the project's completion.

Pilot cars and flaggers will be used as needed.  No work on the weekends is anticipated, except on Sunday nights.

Although most of the work will be done by the weekend, signs will still need to be installed, along with mulching and re-seeding.

Valley Paving & Asphalt Inc., of Cottonwood, Idaho, is the contractor on this $2.15 million project.

Idaho 21 resurfacing to Lowman

A resurfacing project covering 20.4 miles of Idaho 21 in Boise County gets under way Monday (Aug. 6) and will finish in October 2013.

The project runs from Mores Creek Summit to Clear Creek Bridge below Lowman, adding a Stress-Absorbing Fiberglass Layer with Emulsified Asphalt (SAFLEA) on two adjoining sections of Idaho 21 (milepost 52.3 to 60 and 60 to 72.7), conducting slope stabilization, and upgrading guardrail at existing locations.

A SAFLEA treatment is a seal coat with a coating of chopped glass fibers between the oil and gravel aggregates to enhance durability and reduce cracking.

One lane of travel will remain open, with flaggers and pilot cars helping to guide traffic. Crews will work a 7 a.m. to 5 p.m. schedule Monday-Thursday and will work half days on Fridays.  No work is allowed on the weekends.

The contractor is installing trench drains and has reduced two highway lanes to one, with traffic controlled by flaggers.

This week, work consisted of installing trench drains and flushing culverts. Both operations are in the same traffic-control zone. Traffic is reduced to one lane, controlled by flaggers.

Knife River Corp, of Boise, is the contractor on this $3.9 million project.

I-84 bridge repairs

A project rehabilitating three bridge decks in the Caldwell area at Centennial Way, Exit 27 and the Boise River crossing, and the bridge deck at Exit 13 at Black Canyon, is under way.

Some ramps and lanes will be closed during the work. Crews will cone off the affected areas.

I-84, Exit 27 in Caldwell
•    Eastbound off-ramp is open to normal traffic pattern.
•    Westbound on-ramp is closed. 

I-84, Exit 13 at Black Canyon
•    Limited to one-lane traffic across the bridge,
•    Traffic controlled with portable traffic signals.

Concrete Placing Co. Inc., of Boise, is the contractor on this $1.42 million project, which is expected to finish by late October.

U.S. 95 Parma-Wilder resurfacing

Paving on a stretch of U.S. 95 from the south city limits of Wilder to the south city limits of Parma is complete, and resurfacing work is wrapping up from the north side of Parma to the junction with Interstate 84.

The contractor is planning on working in Wilder to complete approach work at the railroad crossing beginning Monday (Sept. 10) and finishing the next day. The ground will be excavated for approximately 10 feet on both sides of the railroad tracks, and the roadway repaved in that location for a smoother crossing of the tracks. This work should complete construction activities for the project.

Idaho Sand & Gravel Co., of Nampa, is the contractor on this $5.7 million project.

EMMETT - Idaho 16, SH 44 to Substation Road

A road, bridge and guardrail-repair project for a 12.5–mile stretch of Idaho 16 from just north of its junction with Idaho 44 to Emmett’s Substation Road is nearly complete.

There is a small amount of punch-list work to be completed – resetting loose delineator posts and removing about 20 feet of asphalt curb that was installed beyond its termination point – which should be done by the middle of next week.

Approximately a month after completion of the work, a second coat of paint will be applied to the pavement markings.

Central Paving Co. Inc., of Boise, is the contractor on this $2.5 million project.

NEAR GRASMERE – Idaho 51 resurfacing

Resurfacing work is wrapping up on a 14-mile stretch of Idaho 51 through Owyhee County. Work is expected to finish in mid-September.

The work begins at Sheep Creek Road (milepost 19.9), which is about eight miles north of the Duck Valley Indian Reservation boundary, continues through Tindal Road and wraps up at milepost 33.7, which is a little more than a mile north of Grasmere.

Motorists can expect lane closures, with flaggers and a pilot car. One open lane will be maintained during the work. The speed limit will be reduced to 35 mph in the project construction zone.

The remaining work is the second application of pavement markings. It will be for half a day and will be a mobile operation. ITD expects the contractor to stripe Idaho 51 a second time during the week of Sept. 17.

Snake River Construction, of Twin Falls, is the prime contractor on this $1.6 million project.

PAYETTE – U.S. 95, Payette River Bridge replacement

The project to improve the U.S. 95 bridge over the Payette River south of Payette is wrapping up. It is expected to finish by the end of September.

Crews are replacing the existing northbound truss bridge (built in 1927) located on U.S. 95 between Fruitland and Payette.

The new bridge will be two feet higher off the water. It will have no overhead bracing or struts, as the current one does, and will be 84 feet in width, eliminating current safety concerns regarding both width and height restrictions.

The new bridge will be constructed next to, and will attach to, the existing southbound bridge. The project also includes minor roadway realignment to tie into the new bridge location.

U.S. 95 is the main route connecting northern and southern Idaho. About 18,000 vehicles use this portion of the highway daily. By 2026, the volume is expected to be more than 25,000.

JC Constructors Inc., of Meridian, is the contractor for this $6.17 million project.

CASCADE – Bridge and Roadwork

A replacement of the North Fork Payette River Bridge in downtown Cascade is now under way, with two miles of pavement resurfacing on Idaho 55 in town wrapping up. The roadwork is expected to finish soon, while the bridge work will extend into summer 2013.

This work is not yet completely done. Signs still need to be installed and there are punch-list items to finish. The signs are on backorder for at least a month. This portion of the project is suspended until that time.

This week, the contractor installed pipe aprons and new signs downtown. 

C & A Paving, of Boise, is the contractor on this $1.86 million project.

This one-year project will eventually replace the old (built in 1933), narrow, width-restricted bridge with one more than twice as wide. The existing bridge is 24 feet wide, and will be replaced with a 60-foot wide, 393-foot long, three-span bridge. The new bridge will have two 12-foot lanes, two 11-foot shoulders and a 14-foot median.

In addition, a paved extension will be constructed to the dirt shared-use path under the bridge on the north side of the river that provides access from both sides of the bridge to the new riverside park.??In the first stage, two-thirds of the new bridge will be built to the west of the existing structure. Traffic will be maintained on the existing bridge through this first stage of bridge work, and then will be routed to the new section of bridge for the remaining work as the old bridge is demolished. There will be traffic interruptions while the new roadway section leading to the new bridge is built.

A 12-foot width is in effect.

This week, the contractor continued to drill the new sewer and water line, excavated abutment 2 and began work on the crane pad in the river. Next week crews will complete the crane pad and set up the crane. Minimal traffic impacts are expected, if at all.

Flaggers will be used if lane restrictions are required. From Monday through Thursday, work that limits drivers to one lane in each direction is only allowed between 9 a.m. and 4 p.m. Two lanes will be maintained between noon Friday and noon Monday. A river safety and navigation plan will be in place for recreationists that use this section of the river.

Wadsworth Brothers Construction Co. Inc., of Draper, Utah, is the contractor on this $4.83 million project.


Highway construction is one of the key forces pushing Idaho toward continued economic vitality by creating jobs, improving safety and reducing traffic congestion.