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:	March 19, 2012
RE:	2011 Pavement Maintenance Program Summary Report

Maintenance Program & Budget

The city’s 2011 pavement maintenance program was reviewed and approved by City Commission on December 14, 2010.  The program had an approximate budget of $5.6 million.  The program projects map had some revisions throughout the year which included the addition of miscellaneous concrete pavement rehabilitation, localized mill and overlay contracted work, and also the installation of speed humps and cushions for traffic calming as a “complete streets” element.  The As-Built 2011 Comprehensive Street Maintenance Program map is attached.

The following table displays the various contracted maintenance projects awarded and completed in 2011.  A detailed photo compilation that includes these project activities was included with the City Manager’s Report on the December 6, 2011 City Commission Meeting Agenda (see the following link 2011 Pavement Maintenance Program Projects Before & After).

Program Project	Award Date	Final Contract Amount
2011 Microsurfacing Program	February 22, 2011	$1,237,065
2011 Overlay Program Phase 1	March 15, 2011	$489,458
2011 Crack Seal Program (Public Works street maintenance)	March 29, 2011	$163,076
2011 Downtown Misc. Concrete Repairs	May 10, 2011	$439,846
6^th St – Folks Rd to Monterey Way Project	May 10, 2011	$698,268 **
CIP Reconstruction – Bob Billings Pkwy (Westbound lanes) Kasold Dr to Crestline Dr	June 7, 2011	$674,163 **
2011 Overlay Program Phase 2	June 14, 2011	$1,361,818
2011 KLINK - W 6th St from Iowa St to Massachusetts St	June 14, 2011	$1,117,349 **

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

Contracted maintenance work performed throughout the 2011 program year included:

Crack Sealing	63,273 lbs crack seal (on 41.5 lane miles of streets)
Microsurfacing (w/ Patching)	33.8 lane miles
Milling & Overlaying	29.0 lane miles
Curb & Gutter	3.49 miles
Concrete Street Rehab - Patching	3,753 square yards

Status of Projects & Highlights

Work began on the 2011 Microsurfacing Program (Project No. PW1103) in mid-March.  The pavement patching and microsurfacing portion of the project was completed in mid-August and the last of the traffic calming speed humps was accepted in late September.  The pavement patching prep work included partial and full depth asphalt pavement repairs.  There was a significant increase in the amount of asphalt tonnage needed over the course of the project for the patch work which resulted in an extended project completion date.  Microsurfacing, in conjunction with patch work, has shown to be an effective preventative maintenance technique to improve and preserve pavement condition for streets that are generally in a good condition.

A significant amount of the microsurfacing project street locations were in the north Lawrence vicinity south of the railroad and also on neighborhood streets bordered by Kasold Dr to Wakarusa Dr and Bob Billings Pkwy to Clinton Pkwy.  Clinton Parkway from Wakarusa Dr to Lake Pointe Dr and Trail Rd from Kasold Dr to Monterey Way were also included as highly traveled locations to receive patching and microsurfacing as an expansion to the usage of programmed surface seal treatments.

The 2011 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 was completed in mid-July.  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 purchased the crack sealing materials, utilized some rented equipment, and also incorporated the use of some contracted labor.  Internal street maintenance crews managed the schedules and directed the field work.  Progression has been relatively slow but the quality of work and effectiveness of material application has exceeded prior crack sealing contracted work.  The weather conditions in 2011 have allowed for continuous application of crack seal material into the later part of the year.  With cooling temperatures, cracks open in width which improves crack filling application effectiveness especially with dry conditions.  When comparing the same volume of work and material, a significant program cost savings of approximately $70,000 was recognized when compared to past contracts.  Excess material purchased in 2011 will continue to be utilized for previously identified street locations along with the 2012 Crack Seal Program which will also be performed internally.

The crack and joint sealing program has included 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 and the downtown area portion was completed in late August.  This concrete rehabilitation project included intermittent curb repair and replacement, some adjacent concrete sidewalk impacted by curb replacement including multiple access ramps, and various concrete street pavement removal and replacement.  The street curb and gutter and concrete pavement sections worked on were in poor condition with extensive concrete deterioration.  The downtown project area limits extended from 6^th St to North Park St and Vermont St to New Hampshire St with various concrete repairs included around the Community Center.

Additionally, the rehabilitation of concrete pavement and curb on Delaware St and E 22^nd Ter from 19^th St to Learnard Ave was included with this project.  This additional work began in mid-August and was completed in late September.  Two other concrete street locations, Kasold Frontage extending north from Tam O’Shanter and Camelback Dr at Quail Creek Dr, were also included with this project as a coordinated effort with the adjacent mill and overlay and microsurfacing work performed in the same vicinity.  This work extension was completed in early November and improved overall impact to the area.

This is the third 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.  The typical life cycle of a concrete street exceeds that of an asphalt street.

6^th St - Folks Rd to Monterey Way (Project No. PW1102) began in late May and was completed in early November.  The project scope included the widening of 6^th Street by 6 feet to the north and south to provide a center turn lane between Folks Road and Monterey Way.  This work was followed by a mill and overlay of the entire roadway, the replacement of existing sidewalk with a 10 foot wide shared-use path on south side, and the reconstruction of driveway approaches.  The raised median in front of Hy-Vee was also removed and the current right-in/right-out access to the Hy-Vee gas station was 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 the pavement reconstruction was completed in mid-August.  The existing curb and gutter, storm sewer and sidewalk remained.  The reconstruction of the driving lanes included full depth removal of the existing pavement, placement of a granular subbase course, the installation of a drainable base with an underdrain system, and 12 inches 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 and a bus shelter.

The 2011 Overlay Program Phase 2 (Project No. PW1105) project began in late June and met separate completion dates in late July and also in late September.  This milling and overlay project also included 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 has improved drainage characteristics and structural capacity.

Some highlights and additions to the project included:

-Aesthetic median improvements (coordinated with Parks and Recreation Dept) along with intermittent curb replacement, under drain installation, and pavement rehabilitation on Kasold Dr from Trail to Peterson Rd.

-Addition of speed cushions in coordination with University of Kansas (KU funded) in the vicinity of W 11^th St and West Campus Rd.

-The mill and overlay addition of W 14^th St from Tenessee St to Jayhawk Blvd in coordination with the university of Kansas (KU funded their portion of W 14^th St).

-Addition of mill and overlay of the northbound lanes of Iowa St just south of Bob Billings Parkway/W 15^th St to address the significant pavement failures.

-Mill and overlay addition of the arterial intersection at Kasold Dr and Bob Billings Parkway to address reoccurring pavement failures.

2011 KLINK Project, W 6^th St from Massachusetts St to Iowa St (Project No. PW1101) began in early July and was accepted in early November.  The 2011 KLINK project consisted of milling and overlay of street pavement along with full depth patching where needed.  The project also included 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 lanes.

“Complete Streets” Elements

ADA Concrete Access Ramps	56 ramps (added/replaced)
Speed Cushions / Humps	11 installed
Added Shared Use Paths	~3,000 linear feet
Added Center/Left & Right Turn Lanes	Kasold Dr (center, left, right) & W 6^th St (center, right)
Landscaping/ Beautification	Kasold Dr medians south of Clinton Pkwy & north of Trail Rd
HAWK Crossings	2 installed – Part of W 12^th St KU-Downtown Lighted Pathway Project
Increased Ridability/ Street Safety for All Traveling Public	All preventative and rehabilitation maintenance activities performed throughout 2011

To summarize, we are making significant progress towards improving roadways in Lawrence with the contracted street maintenance program (see the following link for photo compilation of the various projects 2011 Pavement Maintenance Program Projects Before & After).  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 attached 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 completed the second phase of Cycle 3 street ratings in 2011.  Findings with the new data were reported to City Commission on December 20, 2011 along with the 2012 maintenance program.  General results indicated that deterioration rates are slowing, the PCI is progressively increasing, and the percentages of streets in fair to poor condition are dwindling.  The 2012 Comprehensive Pavement Maintenance Program was approved as presented.  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.

Attachments:  2011 As-Built Maintenance Map