1. Determine Reinvestment
#IowaLeague17
Using Data to
Determine Reinvestment
Brian Schadt, City Engineer/Asst. Dir of Public Works, Davenport
Clay Merritt, CIP Manager, Davenport Nick Schmuecker, Civil Engineer, Davenport
Handouts and presentations are available through the event app and at

2. INTRODUCTION Incorporated in 1839 Population: 102,612
Key Infrastructure Areas
Streets – 1,250 Lanes Miles
Sanitary Sewer – 444 Miles
Storm Sewer – 225 Miles
Streambank – 102 Miles
Challenges
Asset Condition
Climate
Funding

3. STREETS dTIMS: Infrastructure Management Tool
Stores Data and Deterioration Models
Performance Curves
Treatments
Triggers or Decision Trees
Treatment Cost and Budgets
Variables/Data
Pavement Condition Index (PCI)
Average Annual Daily Traffic (AADT)
International Ride Index (IRI)
Pavement Age
Pavement Type
Yearly Budget

4. STREETS
Pavement Condition Index (PCI)

5. STREETS Pavement Treatments Treatment Category Cost/Lane Mile*
PCI Range
Fog Seal
Preventative Maint.
50,521
X>80
Micro-Surfacing
97,205
80-60
Full Depth Patch
102,262
65-35
Cape Seal
Minor Rehab
216,457
61>39
Mill 2” & Overlay
Major Rehab
1,100,272
40-20
Replace HMA
Reconstruction
1,415,291
X<20
Replace PCC
1,490,216

6. STREETS
Example: Use PCI to provide a numerical value of pavements that can be tracked over time when a treatment is applied

7. STREETS
Northwest Blvd: 2013

8. STREETS
Northwest Blvd: 2015

9. STREETS 5-Year Plan (Draft) Treatment: Red – Cape Seal
Orange – Fog Seal
Yellow – Microsurfacing
Green – Mill & Overlay
Blue – Replace Asphalt
Purple – Concrete Patch
Pink – Replace Concrete

10. SEWER Inflow & Infiltration Studies Study Recommendations:
Sewer Lining
Manhole Rehabilitation
Sewer Replacement
Point Repairs
Cross Connection Elimination
New Sewer Lines

11. SEWER Manhole Rehabilitation Program
Combined study & assessment recommendations
Rank assets based on National Engineering Standards
Create groupings for low mobilization cost
Bid items in one package for quantity unit pricing

12. NATURAL RESOURCES Project Prioritization Matrix (0-100)
Ten Weighted Categories:
Perceived Nuisance
Grant Funding
Water Quality Issue
Erosion Problem
Infrastructure Affected
Environmental Judgement
Frequency-Benefit
Life, Healthy & Safety
Solution to Identified Problem
On City Property

13. NATURAL RESOURCES LOW MEDIUM HIGH
High & Low Priority Examples - Localized
LOW
MEDIUM
HIGH

14. NATURAL RESOURCES

15. CONCLUSION
Utilizing data and prioritization matrixes helps city staff in the decision making process by providing logical reasons for project selections when infrastructure needs exceed available funds.
Questions?