Memorandum

City of Lawrence

Public Works

TO:	Mark Thiel, Assistant Director of Public Works – Infrastructure Management
FROM:	Steven M. Lashley, P.E., Project Engineer – Infrastructure Management
Date:	July 15, 2011
RE:	2011 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 14, 2010.  The program has an approximate budget of $5.5 million.  The program projects map has had some revisions which includes the addition of miscellaneous concrete repair rehabilitation contracted work and speed humps/cushions for traffic calming.  The Revised 2011 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	Encumbered Amount
2011 Microsurfacing Program	February 22, 2011	$906,980.57
2011 Overlay Program Phase 1	March 15, 2011	$474,189.94
2011 Crack Seal Program (Public Works street maintenance)	March 29, 2011	$165,860.67
2011 Downtown Misc. Concrete Repairs	May 10, 2011	$290,655.70
6^th St – Folks Rd to Monterey Way Project	May 10, 2011	$671,803.50 **
CIP Reconstruction – Bob Billings Pkwy (Westbound lanes) Kasold Dr to Crestline Dr	June 7, 2011	$714,774.40 **
2011 Overlay Program Phase 2	June 14, 2011	$1,305,689.37
2011 KLINK - W 6th St from Iowa St to Massachusetts St	June 14, 2011	$1,264,618.40 **

** Encumbered amounts are partially funded from other sources such as bonds not included in the street maintenance program budget.

Status of Projects & Highlights

Work began on the 2010 Microsurfacing Program (Project No. PW1103) in mid-March.  Currently, the project is near 55% complete on the microsurfacing portion and 85% complete on the asphalt pavement patch prep work.  This pavement patching prep work includes partial and full depth asphalt pavement repairs.  Microsurfacing, in conjunction with patchwork, has shown to be an effective preventative maintenance technique to improve pavement condition.  Based on the extent of patching and resulting increased quantities, the completion date for the contract was extended to August 12, 2011.  Traffic calming speed humps were also included in this project and the last humps shall be installed in specified locations once the microsurface material has “cured”.

The 2010 Overlay Program Phase 1 (Project No. PW1104) project began in mid-April.  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.

In this maintenance year, the Public Works Internal Street Maintenance Division took on the project work for the 2011 Crack Seal Program (Project No. PW1110).  The City has purchased the crack sealing materials, utilized some rented equipment, and also incorporated the use of some contracted labor.  Internal street maintenance crews are managing the schedules and directing the field work.  Progression has been relatively slow; however, the quality of work and effectiveness of material application has exceeded prior crack sealing contracted work.  A significant program cost savings of approximately $70,000 was recognized by performing the same volume of work in-house when compared to past contracts.  The overall effectiveness of this project will be evaluated once it has been completed and the findings included with the end of year program summary.

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.  This remains one of our most important maintenance tools in the effort to maintain our city streets.

Work began on the 2011 Downtown Misc. Concrete Repairs (Project No. PW1109) in late June.  This concrete rehabilitation project includes intermittent curb repair and replacement, some adjacent concrete sidewalk impacted by curb replacement including access ramps, and various concrete street pavement removal and replacement.  The street curb and gutter and concrete pavement sections being worked on are in poor condition with extensive concrete deterioration.  The project area limits extend from 6^th St to North Park St and Vermont St to New Hampshire St with various concrete repairs to be included around the Community Center.  Currently, Massachusetts St and multiple blocks of New Hampshire St, Vermont St, and numbered cross streets are completed.  To add, rehabilitation of concrete pavement and curb on Delaware St and E 22^nd Ter from 19^th St to Learnard Ave has been included with this project.  This additional work will begin in mid-August and completed in mid-September.

This is the second year of concrete rehabilitation projects primarily focused on the removal and replacement of existing failed concrete pavement without the inclusion of an asphalt overlay.  With the goal of preservation in mind, Public Works has been steadily rehabilitating concrete pavements to extend the life cycle of the street and delaying the need for an asphalt overlay.  Once a street has received an asphalt overlay application, deterioration will persist and even become accelerated.  The typical life cycle of a concrete street exceeds that of an asphalt street and returning to a concrete street after an overlay would most likely require reconstruction.

6^th St - Folks Rd to Monterey Way (Project No. PW1102) began in late May and estimated to be completed in mid-August.  Currently, the project is approximately 35% complete.   The project scope is to widen 6^th Street 6’ feet to the north and south to provide a center turn lane between Folks Road and Monterey Way.  Included in the project is a mill and overlay of entire roadway, replacing sidewalk with 10’ wide shared-use path on south side and reconstruction of driveway approaches.  The raised median in front of Hy-Vee has been removed and the current right-in/right-out access to the Hy-Vee gas station will be converted to a full movement commercial driveway.

The CIP Reconstruction of Bob Billings Pkwy (Westbound lanes) from Kasold Dr to Crestline Dr (Project No. PW1020) began in mid-June and estimated to be completed in mid-August.  The existing curb and gutter, storm sewer and sidewalk will remain.  The reconstruction of the driving lanes includes full depth removal of existing pavement, a flyash treated subgrade, the installation of a drainable base with an underdrain system, and 12” of asphalt pavement.  Also included in the project is the concrete reconstruction of the intersection at Bob Billings Pkwy and Crestline Dr along with the installation of a video detection system.

The 2010 Overlay Program Phase 2 (Project No. PW1105) project began in late June and scheduled to be completed in late September.  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 arterial 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.

2011 KLINK Project, W 6^th St from Massachusetts St to Iowa St (Project No. PW1101) began in early July and estimated to be completed by mid-September.  Currently, the project is approximately 5% to 10% complete with the conclusion of recent work on 6^th St between Massachusetts St and Kentucky St.  The 2011 KLINK project consists of mill and overlay, concrete curb and joint repairs along with full depth patching where needed. The project also includes the addition of a right turn lane / “bus turn out” at two locations – 6^th and Maine and 6^th and Michigan.  In addition to improving traffic flow and safety by providing dedicated right turn lanes for the high volumes of west bound traffic (turning right to go north), these additional lanes will also be utilized by Transit buses as a safer means to pick up and drop off passengers by pulling out of the through traffic.

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 multiple work locations include Turnberry Dr, Carmel Dr, Wimbledon Dr, Forrest Ave at Maryland St, where curb and gutter and concrete valley gutters/intersections were removed and replaced in coordination with contracted milling and overlay and microsurfacing projects (see program map for internal street maintenance major work locations).  This type of collaboration on projects has enhanced the overall impact to several City streets.  As reflected in the recent citizen survey, the residents of Lawrence continue to place a high importance on street maintenance.

Public Works staff will continue street ratings this year with the goal of completing the second quarter of the third cycle this coming Fall followed by an evaluation of the data collected.  This information will continue to assist Public Works by utilizing the street pavement rating data to produce projected maintenance plans for future street maintenance years.  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.