Bridges
We inspect and maintain over 834 bridges (50 of which are Listed
Buildings, and 3 of these are also Scheduled Monuments). Regular
inspections are carried out to identify any necessary maintenance
or repairs. The planned bridge maintenance programme covers
activities that can range from the routine removal of vegetation
and keeping water courses clear to major refurbishment and
reconstruction schemes. The fight against graffiti on bridges and
in pedestrian subways has been helped by the availability of
anti-graffiti coatings. These may be suitable for other surfaces
and the Highways Service can
advise on costs and suppliers.
You can
report graffiti on our Highways Fault Reporting
Form.
Following the increase in permitted lorry weights in February
2001, we assessed the load bearing capacity of all highway bridges.
As a result, some strengthening schemes and weight limits have
proved necessary.
If a road closure is required for bridge inspection, maintenance
or strengthening works, then the relevant Town & Parish Council(s) and all interested
people and organisations will be contacted. Diversions will be
advertised and closure notices published.
Bridge Maintenance Strategy
Our bridge maintenance policy includes inspection,
prioritisation, programming and maintenance. We also have a
statutory duty to control the movement of abnormal loads to protect
highway structures.
Maintenance consists of providing acceptable levels of public
safety, arresting the effects of serious deterioration,
steady-state maintenance and the upgrading of sub-standard
features.
Where possible, maintenance work is incorporated into bridge
strengthening and highway maintenance schemes, particularly where
the work would disrupt the highway if done separately. The
principal items of policy which form the strategy for steady state
maintenance and upgrading are concerned with:
- the safety of bridge parapets;
- problems (e.g. scour) affecting bridges across
watercourses;
- unwaterproofed reinforced concrete bridges;
- improvement of surface water drainage on arch bridges;
- the renewal of bridge expansion joints;
- repairing or rebuilding retaining walls;
- roadside bridge piers which might be hit by vehicles;
- increased traffic volumes causing damage to structures;
- ducts and tendons in post-tensioned pre-stressed concrete
bridge decks;
- repainting of structural steelwork; and
- the particular problems of Listed structures and Ancient
Monuments.
The Five-Year Bridge Maintenance Programme
Cheshire East and Cheshire West and Chester Council are
responsible for over 800 highway bridges and 3 miles (4.75 km) of
retaining walls, and have a legal liability to contribute towards
the maintenance of five British Waterways Swing
Bridges.
The condition of our bridges has deteriorated in recent years
due to insufficient funding. During this time repair works have
been focussed on only serious defects affecting public safety.
There are currently over 300 separately identified maintenance
schemes in the bridge maintenance programme.
Bridge Strengthening Strategy
The maximum permitted weight of lorries was increased in
February 2001 to 44 tonnes. All bridges have had to be assessed to
see if they could cope with this increase safely. The assessment
work needed concerning the Council's bridges and retaining walls,
together with British Waterways, Rail
Property Ltd bridges and Network Rail bridges, is
complete.
Our policy has been to give priority to the completion
of the assessment programme. Pending strengthening, public safety
is maintained on those bridges assessed as weak by using temporary
weight restrictions or other measures and restrictions.
The final number of bridges in Cheshire assessed as
sub-standard is 173. Of the total length of Council retaining
walls assessed, 320 yards (290 metres) has been identified as in
need of strengthening.
The strengthening programme is well advanced, with priority
having been given to principal road bridges. For substandard
bridges on the non-principal road network, decisions are made
whether to permanently weight restrict rather than strengthen. Each
bridge is considered on its merits taking into account safety,
economic and environmental factors.