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The Street Division strives to ensure the street system within the City of College Station is properly maintained. This is done through a number of programs including:

BASE FAILURE REPAIR

 

CONCRETE REPAIR

CRACK SEALING

OVERLAY PROGRAMS

 

POTHOLE PATCHING

SEAL-COAT PROGRAM

EMERGENCY RESPONSE

STREET SWEEPING

 REPORT STREET PROBLEMS 

 

 

 

 

BASE FAILURE REPAIR

 

The Street division crew repairs base failures that are caused by the penetration of water. Base failures are identified when the subsurface of the street collects moisture and loses its compaction causing a weak spot in the asphalt street. This structural failure results in potholes and cracking of the pavement. Repairs are done to prevent further damage and maintain a safe travel surface.

There are 7 Street division employees that remove the failed area by digging up the section of pavement with an excavator, haul the spoiled material with 3 dump trucks and restore the subsurface of the road with new material and compaction equipment.

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CONCRETE AND CURB REPAIR

   

Streets & Drainage division crews will remove and replace concrete curb and gutters that have deteriorated and settled causing ponding. Concrete that has deteriorated or been damaged will allow water to penetrate to the subsurface of the street causing failures and potholes which decreases the life expectancy of the pavement. Sidewalks are evaluated on an as needed basis and are repaired to remove tripping hazards and bring into ADA compliance.

Excavation and prep work is carried out by Street and Drainage crews.  An annual contract is bid out each year for the curb and gutter and sidewalk repairs and is done on a priority and need basis.  As funding allows, some improvements are also carried out under this contract to level out valley gutter cuts in street intersections and to provide ADA ramps.

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CRACK SEALING

 

The Street division seals cracks on the roadway by applying a rubberized asphalt material to the surface of cracks to eliminate the penetration of water that causes potholes and base failures. The crack sealing routine is performed during the Winter and Spring months when the cracks are at their peak (due to the weather) to insure a maximum seal.

There are 3 Street division employees utilizing the crack sealing machine, which is pulled by service truck and one employee providing traffic control.

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EMERGENCY RESPONSE

Street and Drainage Division crews work together to respond to emergencies such as street flooding, ice storms, down trees in the road and debris left in the road due to accidents. Workers are on call 24 hours a day 7 days a week to respond to emergencies. In some cases work schedules are adjusted to have crews on the job 24 hours a day to improve response time.

There are 31 Street and Drainage employees that work to barricade streets that are flooded, remove down trees and sand intersections that are covered with ice.

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OVERLAY PROGRAMS

   

Street division crews will restore the pavement condition to original condition by repairing potholes, base failures and installing an 1 1/2" hot mix asphalt overlay, which restores drainage and improves the ride-ability of the street. These projects are completed with both City personnel and outside contracts.

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POT HOLE PATCHING

 

The Street division patches potholes on a route that covers all the city streets on a bi- monthly basis. In addition, reported potholes are repaired within 48 hours. This routine and response time requires that patching operations run year round.

The pothole patching operation uses a spray injection process where heated asphalt emulsion and aggregate are sprayed into the pothole. This is a one-man operation. A new piece of equipment will carry a two to three man crew, equipment for excavating asphalt and will carry and maintain the proper level of heat for HMAC asphalt.  This equipment will allow for safer and longer lasting asphalt repairs.  It will also be used for patching utility cuts with straight edge repairs.

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SEAL COAT PROGRAM

The Street division does an annual survey of the condition of streets to determine which groups of streets are candidates for sealcoating. The sealcoat process consists of an application of liquified asphalt covered with a layer of aggregate. The asphalt seals cracks to eliminate the penetration of water and the aggregate provides a wearing surface. This program will extend the life of a street 5 to 7 years. We currently seal coat 150,000 SY of pavement each year. The annual sealcoat program takes about 1 month and is conducted during the summer.

This program uses 13 Street division employees utilizing 5 dump trucks to haul aggregate, 1 distributor truck to apply the liquefied asphalt, 1 chip spreader to install the aggregate which is supported by "ground crew" that provides traffic control and physical labor.

The application of a sealcoat surface allows immediate access by traffic.  But the material requires about three weeks to completely cure.  There will be small rock aggregate that will not bond to the under layer of asphalt but will be cleaned up by a street sweeping unit during that three week period.  Care needs to be taken that the newly lain asphalt is not stepped in and tracked into one's house. 

For the first year or so, the surface will be rough and it is not recommended to walk on it with bare feet or to be used as a playing surface for children.  But over time the surface will smooth out and be very similar to a regular hot mix asphalt street surface.

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STREET SWEEPING

 

The Street division will sweep the entire City every 2 months with arterials being swept monthly and streets in the Northgate area being swept weekly. The sweeping routine requires that sweeping operations go on 5 days a week. Sweeping in the Northgate area is scheduled at 3 AM on Friday mornings.

The street sweeping operation utilizes two equipment operators and two TYMCO regenerative air sweepers.

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Last updated: 2/4/2010 2:04:58 PM