The city of Burgdorf is planning to build a new central city building depot with various storage spaces for building materials and machines from the city of Burgdorf with the associated open space. Municipal organizational units that maintain and maintain public facilities and facilities are to be housed on the new building yard. This includes the following tasks:

1. Street and path maintenance,

2. maintenance of urban buildings,

3. winter service,

4. enforcement and maintenance of road traffic regulations and road equipment,

5. Creation and maintenance of urban green spaces,

6. maintenance of roadside greenery,

7. operation, maintenance and care of the urban cemeteries,

8. maintenance of the playgrounds,

9. maintenance of urban compensation areas,

10. Canal entertainment,

11. Other assigned tasks (e.g. preparation of city events).

A feasibility study was carried out by a planning office in mid-2018. The following area information (gross floor area, GFA) comes from the feasibility study from 2018:

1. New construction of the courtyard administration / social wing / workshops on two floors (optionally one floor):

- Employees: 75 (currently 71 men and 4 women);

- Upper floor social / office areas: approx. 800 m 2nd GFA;

- Ground floor workshop areas: approx. 900 m 2nd GFA.

2. New construction of a building for vehicle and equipment halls and one-storey car workshop:

- Motor vehicle workshop with truck working platform, car working platform: approx. 450 m 2nd GFA,

- Unheated work area: approx. 220 m 2nd GFA,

- Parking space unheated: approx. 1 300 m 2nd GFA,

- Heated parking space: approx. 1 620 m 2nd GFA.

3. New construction yard open spaces:

- Salt silo areas with suds container (3 salt silos à 100 t and the suds container) including bypass: approx. 750 m 2nd ;

- Covered outdoor washing area: 130 m 2nd ;

- Graveled storage areas approx. 800 m 2nd ;

- Logistics areas paved approx. 10,000 m 2nd ;

- Paved storage boxes approx. 400 m 2nd ;

- Employee parking spaces 52 parking spaces with access approx. 650 m 2nd ;

- Enclosure and lighting.

The land available at the time of the feasibility study in 2018 had a total area of approximately 18,800 m 2nd and are located on the eastern outskirts of Burgdorf opposite the municipal wastewater treatment plant. Access is via the existing public road network. The plots are currently arable land. The development of a development plan is in preparation. The focus of the study was to check whether the required building yard space program, including the required open spaces at a location, can be related to the urban wastewater treatment plant. The feasibility study came to the conclusion that it is possible to implement the new building on the desired areas. The city of Burgdorf has acquired some of the land and has had a sound, odor, soil and species protection report prepared to date.

An economic feasibility study regarding the type of award was also carried out. The economic feasibility study recommends that a total contractor be commissioned. The management committee followed this result by resolution. The economic viability study has determined a total volume for this measure of approximately EUR 11 million. The current planning assumes a completion date in January 2024.

In the meantime, the city of Burgdorf was also able to acquire the third property, so that now an area of approx. 24 509 m 2nd is available.

In order to prepare and carry out the award to a total contractor, comprehensive consulting services should be awarded to a team of consultants to support the client. These are the following services:

- overall coordination;

- handling of proceedings;

- procurement management;

- Technical advice (building construction and technical building equipment, energy concept, outdoor facilities with salt silos, equipment of the workshops);

- economic advice;

- Controlling during planning and construction;

- Participate in the drafting of a contract.

In addition to the coordination, support and implementation of the award procedure, the object of the contract is in particular the development of output-oriented / functional construction work descriptions, the support of the negotiations as well as the economic and constructional engineering evaluation as well as, after the award procedure has been completed, the planning and construction-related controlling of the contractually agreed performance.

As part of the preparation of the award procedure, an energy concept must be drawn up taking into account the neighboring sewage treatment plant. The wastewater treatment plant has a power consumption of around 1,000,000-1,100,000 kWh / a, of which around 500,000-550,000 kWh / a are produced by the operation of a CHP plant with the use of fermentation gas. The CHP is involved in the operation of wastewater treatment and must be operated depending on the fermentation gas production; a gas storage is integrated, which means that there is limited control. The waste heat from the CHP plant is used to heat up the digester and since October 2019 also to heat (if necessary, heat up) the company building. According to the current assessment, it can be assumed that there are surpluses as follows:

Heat: in the summer months approx. 20,000 to 25,000 kWh, in the winter months up to 0 kWh (heating with natural gas possible) and in the transition period depending on the outside temperature (e.g. Nov. 19: 8 360 kWh, Dec. 19: 1,910 kWh, Jan. 20: 6,160 kWh and Feb. 20: 2,770 kWh). The temperature of the heating water is 55 min O C to max. 80 O C; currently approx. 65 O C and in the summer months up to max. 80 O C).

Electricity: approx. 15,000-20,000 kWh in times when the demand is less than the production; brief changes or fluctuations are not uncommon.

Coupling the electricity networks of the two facilities suggests better utilization of the electricity produced by the CHP and possible photovoltaics on the new building yard. It must be checked whether this is technically and legally possible or economical and which measuring devices are required to determine the respective power consumption shares. If it should emerge that this is only possible / permissible / economical if a common power network is in operation, it must be checked whether the use of the free capacities of the 2 medium transformers on the sewage treatment plant is sensible and sufficient. Furthermore, it is to be determined whether the use of photovoltaics on the building yard buildings represents sensible and economical energy generation, especially in the possible connection with the sewage treatment plant.

In addition, it should be checked whether it is economically and technically possible to use branches and firewood and leaves from green and tree maintenance to generate energy. It is also necessary to check other energy sources than those mentioned in the energy concept.

The client reserves the right to carry out the gradual commissioning without being entitled to further commissioning, nor can any other contractual obligations arise for the customer.