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ART BUILDING
Bridge
to Lake Merritt
to 10th Street
to Ball Fields
Multi-Use Path
to Laney Campus
awkward connection with multi-use path
awkward connection with multi-use path
structure
connection to art building
aesthetic form
ADA access
circulation: connection to paths
bridge width
CONSIDERATIONS
hydrology
permitting
construction
cost
no structural issues
new bridge offers an opportunity to create a unique landmark
ADA accessible
alignment improves access to crossing from Laney College
impacts dependent on design; supporting piers should not be
built in existing channel
permitting should be folded into 10th Street permitting package
uninterrupted use(existing bridge will be used
during construction)
highest cost(depends on design;
~30% more than alt 4)
opportunity to increase width of bridge to accommodate multiple uses
existing steps and sloped path to remain
survey of existing structure and new structural elements needed
existing steps and sloped path to remain
new structural elements may be detrimental to form of existing bridge
ADA accessible
no impact
no impact
use will be restricted during construction
low cost
existing width (6.5’) is narrow but adequate for pedestrian use
no structural issues
existing steps and sloped path to remain
new bridge offers an opportunity to create a unique landmark
ADA accessible
approaches may be modifi ed to improve access
opportunity to increase width of bridge to accommodate multiple uses
impacts dependent on design; supporting piers should not be
built in existing channel
permitting should be folded into 10th Street permitting package
restricted useduring construction
high cost(depends on design)
diffi cult to detect damage to existing foundations
fewer steps and shorter sloped path
design options may be limited by existing foundations
ADA accessible
approaches may be modifi ed to improve access
will be similar in width to existing bridge (6.5’)
no impact
permitting should be folded into 10th Street permitting package
use will be restricted during construction
low-medium cost(~20% more than alt 2)
ALTERNATIVE 1
no action
poor existing condition
existing steps and sloped path to remain
existing bridge is aesthetically pleasing
not ADA accessible
existing width (6.5’) is narrow but adequate for pedestrian use
no impact
no impact
no impact
no immediate cost
high benefi t/low negative impact
benefi t/medium impact
low benefi t/high negative impact
ALTERNATIVE 5
new bridge atnew location
ALTERNATIVE 2
retrofi t existingbridge
ALTERNATIVE 4
new bridge onnew foundation
ALTERNATIVE 3
new bridge onexisting foundation
PEDESTRIAN BRIDGE ALTERNATIVES COMPARISON
0 15’ 30’ 60’ 120’
Improvements at Lake Merritt Channel
ALTERNATIVE 1
NO ACTION
ART BUILDINGART BUILDINGART BUILDINGART BUILDING
Bridge
to Lake Merritt
to 10th Street
to Ball Fields
Multi-Use Path
to Laney Campus
Bridge
to Lake Merritt
to 10th Street
to Ball Fields
Multi-Use Path
to Laney Campus
Bridge
to Lake Merritt
to 10th Street
to Ball Fields
Multi-Use Path
to Laney Campus
Bridge
to Lake Merritt
to 10th Street
to Ball Fields
Multi-Use Path
to Laney Campus
Existing Bridge
(Demolished)
PEDESTRIAN BRIDGE ALTERNATIVES COMPARISON
0 15’ 30’ 60’ 120’
Improvements at Lake Merritt Channel
ALTERNATIVE 2
RETROFIT EXISTING BRIDGEALTERNATIVE 3
NEW BRIDGE ONEXISTING FOUNDATION
ALTERNATIVE 4
NEW BRIDGE ON NEW FOUNDATION
ALTERNATIVE 5
NEW BRIDGE AT NEW LOCATION
