Memorandum

City of Lawrence

Public Works

TO:	Mark Thiel Assistant Director of Public Works
FROM:	Steven M. Lashley, P.E. Project Engineer – Infrastructure Management
Date:	July 28, 2010
RE:	2010 Pavement Maintenance Program Mid Year Update

Maintenance Program & Budget

The city’s annual pavement maintenance program was reviewed and approved by City Commission on December 1, 2009 with an approximate budget of $5.1 million. The program projects map has had several revisions. The greatest impact to our program revisions this year was due the more extreme 2009/2010 winter months that caused several high traffic volume streets to deteriorate at a higher rate. It became necessary to reallocate the bulk of the funding ($850,000) programmed for the Infrastructure Sales Tax Project - Kasold Dr from 5^th Ter to Peterson Rd and to also request a program budget increase ($511,000) for the inclusion of additional streets for emergency repair and rehabilitation so that other approved project locations did not have to be eliminated from the 2010 maintenance plan. The City Commission approved these requests for changes at the March 9, 2010 and May 25, 2010 agenda meetings. The Revised 2010 Comprehensive Street Maintenance Program map is attached and is still subject to revisions until projects are completed and an as-built map can be updated.

The following table displays the various contracted maintenance projects awarded this year, all of which are currently active projects (see attached photographs).

Program Project	Award Date	Award Amount
2010 Crack Seal Program	February 9, 2010	$248,000
2010 Microsurfacing Program	February 9, 2010	$422,957
2010 Overlay Program Phase 1	March 23, 2010	$581,616.05
2010 Overlay Program Phase 2	June 22, 2010	$1,369,099.80
KLINK - Overlay of E 23^rd St	May 4, 2010	$570,420.05
2010 Concrete Rehabilitation Program	July 13, 2010	$273,520.00

Status of Projects & Highlights

Work began on the 2010 Crack Seal Program (Project No. PW1003) in late April. Currently, the project is near 75% complete. Due to weather impacts, contractor equipment issues, and contractor personnel turnover, there have been delays in progression throughout the course of the contract. Staff has continuously worked with the contractor to take corrective actions to keep the project on track and within specifications. The contract period was extended to the end of July based mainly on the significant number of rain days that inhibited crack seal placement. At the end of June, Public Works approved the contractor’s hiring of a subcontractor (at no additional cost to the City) to provide more crews and equipment to increase their application rate capabilities. Significant progress has been made since the additional crews became active.

This crack and joint sealing project includes a number of residential, collector, and arterial streets. Streets to receive crack sealing are determined to be in generally good condition. Crack sealing is applied to cracks and joints to prevent the intrusion of moisture into the subgrade and to slow pavement deterioration. Over time, water infiltration through cracks and joints will lead to subgrade destabilization and additional pavement distresses. We will plan to continue utilizing this maintenance method in future maintenance years since it is a standard preventative and effective maintenance technique.

The 2010 Microsurfacing Program (Project No. PW1004) began in early April and is near 100% completion on the microsurfacing portion of the project. This contract includes partial and full depth asphalt pavement repairs in preparation for the microsurface seal application. Microsurfacing, in conjunction with patchwork, has shown to be an effective preventative maintenance technique to improve pavement condition.

A significant amount of the microsurfacing project locations were in the North Lawrence vicinity and generally north of the rail road tracks. The areas generally south of the rail road tracks are likely to be proposed for the 2011 microsurfacing program. A portion of the 2^nd and Locust detour route was repaired in conjunction with the area microsurfacing work which also includes significant work at 3^rd and Perry, Lyon from 2^nd to 3^rd, and N 2^nd south of Lincoln to the underpass. The coordination and overall impact of the multiple projects to this vicinity has produced very positive feedback.

On May 25, 2010 the City Commission approved a program budget increase of $511,000 to address other area patching repairs needed of which $100,000 was added under this contract to perform work in “Additional Area Patching Locations” as shown on the attached program map. Currently, work is being performed on a couple of the additional street locations which includes Mississippi from 9^th to 13^th and Connecticut from 7^th to 15^th. Work will continue on the other identified streets on the map until the additional funding is diminished. To add, $11,000 of the program increase was included to microsurface and stripe two City parking lots which are located at 6^th and New Hampshire and in the 700 block of New Hampshire.

The 2010 Overlay Program Phase 1 (Project No. PW1005) project began in early May. This milling and overlay project includes a number of City residential streets and the project is currently near 100% completion. The street mill and overlay sections to be worked on are determined to be in generally fair to poor condition and have deteriorated beyond the point at which cost-effective preventative maintenance techniques can be performed. This type of minor rehabilitation work is utilized when some structural deficiencies exist along with other signs of progressed deterioration that lead to poor drainage and diminished ride quality. An effective milling and overlay program will re-establish desired drainage, structural, and ridability characteristics to a street and reduces other long-term maintenance and rehabilitation costs.

As part of Overlay Phase 1, Missouri St from 9^th to 11^th, Emery from 9^th to High Dr, and 17^th from Indiana St to Illinois St were added to the contract as a portion ($325,000) of the May 25, 2010 City Commission approved program $511,000 budget increase for additional streets.

The 2010 Overlay Program Phase 2 (Project No. PW1006) project began in late June and scheduled to be completed in early October. Currently, the project is approximately 5% to 10% complete. This milling and overlay project also includes some curb and gutter removal and replacement on City residential and collector streets. Similar to Overlay Phase 1, these streets are generally in fair to poor condition and the maintenance work will lead to improved drainage characteristics and structural capacity.

The KLINK Overlay of E 23^rd St from Haskell Ave to east City Limits (Project No. PW1001) project began in early July and is estimated to be completed in early August. KLINK is partially funded by the Kansas Department of Transportation (KDOT), $200,000. This milling and overlay project will also include significant full depth concrete patching repairs to address the extensive pavement failures throughout the street segment. There are plans to also reconstruct a portion of the concrete intersection on the south side of the intersection at Haskell Ave of which $50,000 was added to the project to cover these costs out of the $511,000 program increase. In addition, the traffic loop detection system at the intersection of 23^rd and Haskell will be converted to a video detection system. A traffic video detection system has several advantages over a loop detection system. One key advantage to video detection is that they do not have to be physically placed into the existing pavement through partial depth saw-cutting. The saw-cutting for each loop installed increases the deterioration of the pavement structure due to the repeated replacements with each overlay.

The 2010 Concrete Rehabilitation Program (Project No. PW1014) just began in late July and is planned for completion in mid to late September. The project includes a significant amount of full depth concrete patching and curb and gutter removal and replacement on Inverness Dr from Bob Billings Pkwy to Clinton Pkwy. A significant portion of the funding for this project came from the reallocation of $250,000 from the Kasold Dr Sales Tax Project budget and $25,000 was funded from the CC approved program increase on May 25, 2010. Once the major work is completed by the contractor, internal street maintenance crews will work on the smaller patch locations with “Tech-Crete”.

To summarize, we are making significant progress towards improving roadways in Lawrence with the contracted street maintenance program (see attached photographs of some of the various project locations). Internal street maintenance crews have also played a key role in making this maintenance year a success. Some of the work locations include West Hills Pkwy & Ter near Stratford and West Campus Rd where curb and gutter was removed and replaced in conjunction with sidewalk replacement, concrete pavement patching, and asphalt overlay (see program map for internal street maintenance major work locations). In addition to the in-house street projects, street maintenance crews have provided localized curb and gutter replacement, concrete valley gutter intersection improvements, and area patchwork in coordination with the contracted maintenance projects that have enhanced the overall impact of work on several City streets. An example of this type of work includes the installation of concrete valley gutters on both sides of the intersection of W 30^th St and Harrison Ave.

Public Works staff will continue street ratings this year with the beginning of third full rating cycle and the goal of completing the first 25% of the new cycle this coming Fall followed by an evaluation of the data collected. We have been working with the existing street pavement rating data to produce projected maintenance plans for future street maintenance years in anticipation of developing a five year plan. Having a projected maintenance plan will increase our effectiveness in programming street sections for upcoming maintenance years and will continue to be an ongoing project from one maintenance year to the next. We believe that the maintenance program is working and the continued support from City Commission has given us the ability to make progress.

Attachments: 2010 Maintenance Map, Project Photographs