Alder Drive / Blair Road Bridge Replacement Projects

Transcription

1 Alder Drive / Blair Road Bridge Replacement Projects Presented By: County of El Dorado Community Development Agency Transportation Division Matthew Smeltzer, P.E. Deputy Director of Engineering Paul Hom, P.E. Senior Civil Engineer Chandra Ghimire, P.E. Associate Civil Engineer Public Informational Meeting, Monday, July 29, 2013 Pollock Pines Camino Community Center 1

2 Public Meeting Agenda Welcome and Introduction Matt Smeltzer County Bridge Program / Funding Matt Smeltzer Alder / Blair Bridges - Facts / Conditions Paul Hom Project Overview Paul Hom Open Question & Discussion Period County Staff Available to Answer Questions and Receive Public Input 2

3 County Bridge Inventory 79 Total Bridges in County Bridge Inventory 25 are in 2013 Capital Improvement Program adopted June 24, 2013 (see Section VIII: West Slope Projects) Included in the CIP - Two crossings over EID Canal: Alder Drive (CIP# 77123) and Blair Road (CIP# 77119) Both projects eligible for 100% reimbursement from the federal funding Highway Bridge Program (HBP) 3

4 Highway Bridge Program (HBP) Federal funding program for bridge safety projects - maintenance, rehabilitation and replacement Program authorized by Federal Highway Administration (FHWA) & administered by State DOT s (CA Caltrans) Requires Planning, Environmental, and Preliminary Engineering (PE) completed within 10 years of PE authorization date April 2011 County received FHWA authorization to proceed with PE for Alder/Blair projects 100% Federal Participating Share - No Local Match (County General Fund will NOT be used) 4

5 Bridge Inspections / Sufficiency Ratings Each bridge is thoroughly inspected by Caltrans every 2 years and rated on 140 elements Given a Sufficiency Rating (SR) score of 0 to 100 Rating is overall measure of the bridge condition and sufficiency to remain in service Used to determine eligibility for federal funds and prioritization 5

6 Federal Funding Eligibility Criteria SR < 80 is eligible for Rehabilitation SR < 50 is eligible for Replacement Rehab projects cannot use any additional federal aid for 10 years. Replacement projects - bridge must be either functionally obsolete or structurally deficient. 6

7 Bridge Sufficiency Terminology Functionally Obsolete: Built to standards that are not used today, such as inadequate lane widths, shoulder widths, or vertical clearances to serve current traffic demand. Structurally Deficient: Limitations of the structural condition of the bridge, such as weight limits or load capacity. 7

8 Alder Drive Bridge Location AT PONY EXPRESS TRAIL 8

9 Alder Drive Bridge Facts / Condition Year Built: 1930 (83 years old) Expected life: 75 years One-lane,18-ft wide x 32-ft long Reinforced concrete slab (no abutments) Avg. Daily Traffic: 2,070 (both directions, 2010 traffic count) Sufficiency Rating: 53.2 Functionally Obsolete 2011 inspection show eroded bridge embankments, exposed railing rebar 9

10 Alder Bridge Photos 6/30/13 10

11 Blair Road Bridge Location 0.7 miles north of Pony Express Trail 11

12 Blair Road Bridge Facts / Condition Year Built: 1935 (78 years old) Expected life: 75 years One-lane, 15-ft wide x 35-ft long Reinforced concrete slab with concrete rail Avg. Daily Traffic: 960 (both directions, 2010 traffic count) Sufficiency Rating: 56.5 Functionally Obsolete 2010 inspection reported north bridge abutment eroding, diagonal cracks, exposed rail rebar 12

13 Blair Bridge Photos 6/30/13 13

14 Why Replace the Existing Bridges? Both bridges past 75 year life expectancy Both bridges are classified as Functionally Obsolete 100% federal funding secured now; this funding may not be available in future, if projects are postponed No County funds will be used for this project Narrow one-lane restricts emergency access 14

15 Alder Drive Bridge Conceptual Design Proposed Width: 30 feet (Two 12-ft lanes w/3-ft shoulders) Roadway Design Speed: 25 mph 15

16 Blair Road Bridge Conceptual Design Proposed Width: 28 feet (Two 11-ft lanes w/3-ft shoulders) Roadway Design Speed: 25 mph 16

17 Alder Detour Route during Construction Bridge will be closed for approx. 60 days Detour is ½ mile or approx. 2 min. drive 17

18 Blair Detour Route during Construction Bridge will be closed for approx. 60 days Detour is 3 miles or approx. 6 min. drive 18

19 Metal Beam Guardrail Design Examples 19

20 Estimated Project Schedule Project Prioritized/Federal Funding Programmed (Highway Bridge Program) 2011 Develop Alternatives, Public Meeting, Preliminary Design 2013/14 Prepare Environmental Document in Compliance with CEQA & NEPA 2013/14 Public Review 2013/14 Develop Plans, Specifications and Estimate (PS&E) 2014/15 Right of Way Acquisition 2015/16 Construct Project 2016/17 20

21 Questions or Comments Fill out a Comment Card Today Visit the project website: alder.blairbridges@edcgov.us Mail: El Dorado County Transportation Div. Attn: Chandra Ghimire 2850 Fairlane Court Placerville, CA Phone: (530)