River areas - Topographic Surveys

PCA produce highly accurate Digital Terrain Models (DTM) of land and river networks. In addition we can provide both lateral and skew cross sections of bridges.

As with all our surveying services PCA provide survey data, ready to use in the format that is most cost effective for our customers.

 Topographic Survey of River

DTM Production

Our work includes a full 3d topographic survey of The River Dodder and its tributaries as part of a flood study for Dublin City Council. Production of a longitudinal section and cross sections as well as elevations of all bridge structures.

Also PCA carried out a detailed survey and DTM production of Ballymurtagh Landfill in Wicklow to ascertain settlement of waste.


The health and safety of our staff, customers and the public are a paramount consideration in everything we do.

PCA surveyors are trained and equipped to survey rivers and waterways.

Bridge surveys

Bridge surveys include river, road and rail crossings and also causeways and tunnels.By their very nature they require a good deal of planning. Safety is a major issue and consideratioin must be given to working so close to water, heights, road and rail traffic.

Working windows and access times may be reduced by lane closure constraints and "track possession" time limits.

Choosing the correct methodology and equipment is critical in such instances. An understanding of bridge elements and structures is key to knowing what exactly to measure ( abuttments, wing walls, springing points of arches, spandrils, decking etc).

PCA has many years of experience in Bridge surveying.

River Section Survey

Bridge Section Survey

River Dodder Survey


River Dodder & Tributaries Flood Survey

Carrickmines Shanganagh River Survey

River Wad Flood Survey

CDM River Abstraction Project (20 Rivers)

Five Mile Point Coastal Survey

Ballygannon Coastal Survey

Broadmeadow River Survey

Varioius River Liffey crossings

Malahide Causeway

Cork to Cobh Causeway


Liffey Valley Bridge M50

Macken Street Bridge

Millenium Bridge

Boyne Viaduct

Ardenode Bridge

Ballymahon Bridge

Kilbride River Bridge

M50 Tolka Bridge

Millbrook Bridge

Overend Bridge

Ballinalack Bridge

Boveen Bridges

Ferrycarrig Bridge