Since 2004 we have been designing on watercourses in Hesse and Rhineland-Palatinate: restoring continuity, holding back floods, substantiating permits so they hold. Our clients are municipalities, water authorities, associations and operators.
Fish passes up and downstream, rock ramps, bypass channels, conversion or removal of weirs. We first check which solution actually works at your structure – a ramp needs space and gradient, a bypass channel needs land beside the watercourse.
For municipalities usually a measure from the Water Framework Directive programme, often funded.
Discharge calculation, digital water surface profiles, rainfall-runoff. This is the maths the authority uses to justify the permit – and the basis for every dimension.
Based on our own river survey, not on data taken over from elsewhere.
Retention areas and stormwater basins, from concept through permitting to construction. With heavy rainfall it is rarely about the watercourse alone but about the flow paths through the settlement.
Hesse funds municipal provision; we deliver the auditable documents for it.
Complete application documents for the lower water authority: explanatory report, drawings, hydraulic evidence. We know the procedure and where applications usually get stuck.
Expect several months at the authority. Starting early pays off.
Basic evaluation, preliminary and final design, permitting, detailed design, tendering, award, site supervision, handover and documentation.
You have one contract and one contact instead of three.
River survey, cross sections, as-built record of the structures, determination of the design discharge.
Hydraulic evidence, comparison of options, application documents for the lower water authority.
Construction drawings, bill of quantities, tendering, support during the award.
Site supervision, setting out, control surveys, final account, as-built documentation.
The more of this you have, the sooner the quote arrives. If something is missing, we will tell you how to get it.
Space, gradient and the question of whether the weir has to stay decide it. If it stays (for a mill, say, or for flood relief), a bypass channel is usually the answer. If it can go, a rock ramp is the more natural and usually cheaper solution. We calculate both before we recommend.
We deliver the auditable documents for the application and the proof of use, with cost estimates in the customary structure. The application itself is submitted by the municipality – nobody can take that over.
From the first survey to handover usually one to two years, longer for larger measures. The long part is rarely the design but the permitting procedure and the construction window – work on a watercourse is normally done at low water.
Describe it in the form – three minutes. We reply within two working days with an assessment.
