2018-049 Micro Surfacing Services ISRDate: May 4, 2018 Report No. 2018-049
INFORMAL STAFF REPORT
TO MAYOR AND CITY COUNCIL
SUBJECT:
To provide background on the City’s Micro Surfacing program for asphalt streets in advance of a
micro seal maintenance contract planned for City Council consideration on May 22, 2018.
BACKGROUND:
Micro sealing is a type of preventative maintenance that involves applying a thin protective coating
of asphalt emulsion blended with finely crushed stone. This application allows for better traction
to renew the road surface and seal minor cracks to the surface of a street that is still in good
condition. Due to a short application and cure time, about one hour, micro sealing lessens the
impact to our citizens by minimizing lane closure times.
The City of Denton maintains a total of 1,331 lane miles (949 are made of asphalt and 382 of
concrete). Utilizing this program is an appropriate means to prolong the life expectancy of the road
and provide the driver with a safer and smoother ride.
DISCUSSION:
Similar to changing oil in a car, Micro Seal is a cost effective way to maintain an asphalt street’s
good condition before too much damage occurs due to normal wear and tear to the street’s surface.
Micro sealing can extend the life of asphalt pavements another 7-10 years and will increase the
Pavement Condition Index of the street (see attached chart).
The City of Denton uses a 100-point scale for their Pavement Condition Index (PCI). The
Pavement Condition Index combines surface distress (such as rutting, cracking, potholes, punch
outs, and patches) and ride quality into a single index that ranges from 1 (worst condition) to 100
(best condition). This increases the Pavement Condition Index and allows the road for it to reach
its full life span of 30+ years. If the road is left untreated, the normal life expectancy is roughly
12 years.
The following steps are used on an annual basis to determine which streets receive the micro
sealing application:
1. Streets are selected for Micro Sealing by first using the Pavement Condition Index to
identify the streets that are in the 75+ range.
2. Streets scored 75+ are then visually inspected by City crews to confirm the scoring.
3. The confirmed list is compared to projects planned in CIP, Water, Wastewater, and
Drainage. This determines if any of the roads have other planned maintenance and
replacement of infrastructure.
4. Roads not requiring maintenance or are already planned for other infrastructure work are
removed from the list and the remaining streets is the final list.
Date: May 4, 2018 Report No. 2018-049
Micro Sealing is 100% contract work. The City does not have the specialized equipment required
for this process.
On May 22, 2018, staff plans to bring forward a one year (with three (3) additional one (1) year
extensions) micro seal maintenance contract in an amount not to exceed $2,500,000. Currently
City of Denton Streets Department has identified 71 streets, totaling 57.9 lane miles of roadway,
roughly $800,000 which will be completed for year 1 of this contract.
CONCLUSION:
In summary, it is staff’s opinion that the micro sealing of asphalt roads is a beneficial component
of the City’s overall maintenance program for the many miles of streets/roads it maintains.
The City Council will be considering a one year (with three (3) additional one (1) year extensions)
micro seal maintenance contract at its May 22, 2018 meeting for an amount not to exceed
$2,500,000. If City Council approves the contract it allows the City of Denton Streets Department
to proactively maintain the City’s streets and work towards raising our overall Pavement Condition
Index to better serve our citizens.
ATTACHMENT(S):
Pavement Condition Index Graph
Anticipated Streets Micro Seal List (year one 1 – 2018)
STAFF CONTACT:
Daniel Kremer
Deputy Director of Operations
Streets and Storm Water Division
Capital Projects Department
(940) 349-7193
Daniel.Kremer@cityofdenton.com
Date: May 4, 2018 Report No. 2018-049
Date: May 4, 2018 Report No. 2018-049
2018 Micro Seal List
STREET FROM TO LM COST
Baldwin Morse Ramey 0.4 $5,671
Barrow Westgate Dead end
west 0.4 $5,259
Boardwalk Hill Lincoln 0.9 $12,064
Bryan Scripture Oak 0.5 $6,863
Carlton Malone Gober 0.3 $3,793
Chambers Hill Dallas Dr 0.6 $8,351
Charlotte Bonnie Brae Ave G 0.7 $9,419
Clifton Dallas Dr Simmons 0.2 $3,202
Congress Bolivar Elm 0.2 $3,300
Cook Simmons Ruth 0.2 $3,024
Cook Mill Robertson 0.4 $5,800
Crawford Paisley McKinney 0.8 $10,823
Davis Crawford Ruddell 0.2 $2,241
El Paseo Forestridge Dead end east 1.9 $26,448
Gatewood Lafayette Ticonderoga 0.6 $8,762
Greenlee Bernard I35 service Rd 0.9 $12,567
Hill Morse Smith 0.8 $11,043
Hunters Ridge Lillian Miller Lillian Miller 0.7 $9,605
Indian Ridge
dr
Teasley Ln Smokerise Cir
0.5 $6,438
John Stephen Westgate 0.6 $8,589
Kings Row Sherman Calvert 1.9 $26,448
Lafayette Hollyhill Gatewood 0.4 $5,413
Lincoln Chambers Park 0.2 $2,591
Linden Ector Malone 1.2 $16,382
Louise Bonnie Brae Ave G 0.7 $9,022
McCormick Willowwood I35 service Rd 1.3 $18,122
McCormick Willowwood Parvin 1.6 $21,825
Meadow Oak Autum Oak Mulkey 0.4 $5,413
Morse Woodrow Jackson 3.2 $43,848
Norman Collins Greenlee 0.4 $5,394
Oaktree Mulkey Autum Oak 0.5 $6,960
Park/Simmons Hill Dallas Dr 0.8 $11,213
Pembrooke Longridge Savannah 1.3 $18,096
Piner Oak Hickory 0.2 $2,436
Primrose 380 Emery 0.2 $2,861
Ramey Baldwin Dead End 0.3 $4,253
Date: May 4, 2018 Report No. 2018-049
Ruddell McKinney Texas 1.4 $19,333
Ruth Cook Hill 0.7 $9,718
Sandpiper Teasley Ln Pennsylvannia 0.9 $12,219
Sherman Locust Hercules 10.3 $140,592
Smokerise Indian Ridge
Dr
Indian Ridge
Dr 0.8 $10,440
Standefer cir Baldwin Dead end 0.1 $1,518
Tennyson Lynhurst Hollyhill 0.3 $4,253
Ticonderoga Gatewood Hollyhill 0.5 $6,805
W. Prairie Ave H Bonnie Brae 0.3 $4,640
Warren Locust Wainwright 0.1 $1,949
Wilderness Colorado Kenwood 0.5 $7,037
Windsor Locust 77 1.5 $20,292
Woodbrook Hollyhill Longridge 1.1 $14,544
Oakwood McCormick
Dead end
west 0.3 $4,756
Granada trail Monecito Ryan 1.2 $16,971
Seville Granada Montecito 0.3 $3,753
Montecito Granada Ryan 0.9 $12,055
Moorland Creekdale Circle view 0.1 $1,083
Stoneway Edgefield Riverchase 0.5 $6,676
Edgefield Stoneway Circle view 0.2 $3,031
Crestwood Live Oak Dead end 0.2 $3,062
Crestwood Edgewood Greenwood 0.4 $5,290
Palmwood Kaywood Glenwood 0.4 $4,795
Sambass I35 Londonerry 0.9 $12,930
Hollyhill Woodbrook Longridge 1.0 $14,216
Ave A Eagle 35 1.5 $20,439
Wildwood Parkhaven Teasley 0.6 $8,039
Parkhaven Wildwood E. Ryan 0.5 $7,377
Overlake E. Ryan Wildwood 0.5 $6,857
Panhandle Fulton Malone 1.0 $13,714
Montevideo Monte Carlo Dead end 0.3 $3,480
Ridgemont Ryan San Marino 0.4 $5,955
San Marino Ridgemont Monte Carlo 0.3 $4,308
Monte Carlo Ryan Dead end 0.5 $6,554
Pennsylvania Teasley Southmont 0.5 $6,193
Total 57.9 $788,413