parks & leisure services commission status update: diablo
Post on 28-Mar-2022
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Status Update:Diablo Road TrailC I P P r o j e c t C - 0 5 5
P a r k s & L e i s u r e S e r v i c e s C o m m i s s i o n
S e p t e m b e r 1 2 , 2 0 1 8
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Diablo Road Trail A l o n g - te r m v i s i o n to c l o s e a b i c yc l e a n d p e d e st r i a n t ra i l ga p
D a n v i l l e T o w n w i d e T r a i l P l a n ( a d o p t e d 1 9 8 9 ) ,M a p s 2 0 a n d 2 1
Diablo Road
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Diablo Road Trail A l o n g - te r m v i s i o n to c l o s e a b i c yc l e a n d p e d e st r i a n t ra i l ga p
D a n v i l l e T o w n w i d e T r a i l P l a n ( a d o p t e d 1 9 8 9 ) ,M a p s 2 0 a n d 2 1
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Diablo Road
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Danvil le Bicycle & Trail Network: 1989
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Danvil le Bicycle & Trail Network: 2018
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Danvil le Bicycle & Trail Network: 2018
Trail Gap
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Diablo Road Trail: Conceptual Alignment
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Diablo Road Trail: Conceptual Alignment
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Magee Property: Development Requirements
Diablo Road
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Magee Property: Conceptual Trail Alignment
Q u e st i o n s a b o u t t h e Tra i l :
1 . F u n d i n g ( I s i t a r e a l p r o j e c t ? )
2 . F e a t u r e s ( Wo u l d i t b e p a v e d ? )
3 . F e a s i b i l i t y ( C a n i t b e b u i l t ? )
4 . A l t e r n a t i v e ( W h a t a b o u t b i ke l a n e s ? )
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Magee Property: Conceptual Trail Alignment
Q u e st i o n s a b o u t t h e Tra i l :
1 . F u n d i n g ( I s i t a r e a l p r o j e c t ? ) • A n s w e r : Ye s
2 . F e a t u r e s ( Wo u l d i t b e p a v e d ? )• A n s w e r : Ye s
3 . F e a s i b i l i t y ( C a n i t b e b u i l t ? )• A n s w e r : Ye s
4 . A l t e r n a t i v e ( W h a t a b o u t b i ke l a n e s ? )• A n s w e r : A n a l y s i s c o m p l e t e d
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Feasibil ity Analysis
A s s e s s m e nt o f O p t i o n s :
1 . R o a d C r o s s i n g s
2 . D r a i n a g e C r o s s i n g s
3 . H i l l A l i g n m e n t s
E st i m ate o f C o st s
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Roadway Crossing Options
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Drainage Crossing Options
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Hill Alignment Options
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Diablo Road Trail: Feasibil ity Study Summary
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Analysis: Diablo Road Widening for Bike Lanes
Diablo Road
Project Limits: Diablo Road, Green Valley Road to Mt. Diablo Scenic
Distance: 1.35 miles
In-House Assessment:
1. Road configuration (What would it look like)
2. Potential Impacts (Environmental and fiscal)
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42-Foot Roadway Cross Section provides for:
• Two 12-foot travel lanes
• Two 5-foot bike lanes
• Two (2-ft and 3-ft) shoulders
• One 3-foot drainage swale
Lane and shoulder widths consistent with current AASHTO standards
Analysis: Diablo Road Widening for Bike Lanes
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“As the gateway to Mount Diablo State Park, Diablo Road itself is an
important scenic corridor … [and] retains the character of a country
road. The Town strongly supports retention of this character and
protection of the views and vista from the road.”
- Danville 2030 General Plan
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• Removal of 341 Oak trees
• Grading of 61,000+ cubic yards of soil
• Constructing ~5,450 linear feet of retaining walls, ranging from 3-17 feet high
• Realigning Green Valley Creek
• Relocating 47 utility poles and all fire hydrants
• Temporary one-lane travel on Diablo Road during 18-24 month construction period
E nv i ro n m e nta l I m p a c t i n c l u d e
Analysis: Diablo Road Widening for Bike Lanes (cont ’d)
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Project Component
Source: 2017 Contract Cost Data, California Department of Transportation
Estimated Cost
Project DesignEngineering, surveys, geotechnical services, environmental permits
$8,100,000
Site Preparation • Site mobilization and traffic control: $7,000,000• Tree removal (341 Oak trees): $1,705,000• Removal of fences, road rail, retaining walls, drainage systems, etc. $1,863,000• Clearing and grubbing: $3,500,000• Utility relocation (47 poles; all fire hydrants): $6,500,000• Culvert crossing and creek realignment: $2,950,000• Miscellaneous administrative: $240,000
$23,758,000
Construction $15,751,074
Contingency (15%) $7,141,361
Estimated Total (Design & Construction): $54,750,435
Analysis: Diablo Road Widening for Bike Lanes
C o m p a r i s o n : I - 6 8 0 A u x i l i a r y L a n e s , S e g m e n t 2 = A p p r o x . $ 3 4 m i l l i o n
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Diablo Road Trail (CIP Project C -055)
• Accept informational status update
• Provide conceptual feedback
Re co m m e n d at i o n
Q u e st i o n s ?
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