Dam in Busharino, Odintsovsky District

Scope of work

• 2 boreholes 8 m deep — 16 linear metres of rotary core drilling
• 2 cone penetration tests (CPT) to a depth of 8 m
• 10 undisturbed soil cores and 10 sand samples for laboratory testing, 6 soil samples and 3 groundwater samples for chemical analysis and aggressiveness to concrete and steel
• 12 triaxial compression tests, physical property determinations on 20 sand and sandy clay samples
• reconnaissance survey of the territory — 0.3 km, collection of archival geological and hydrogeological maps

Results

1. Geotechnical conditions — complexity category III (complex).
2. Beneath 0.2 m of made ground (which cannot be used as a foundation bearing stratum), two engineering geological units have been identified down to a depth of 8 m: soft light sandy clay (EGU-2, deformation modulus 9.4 MPa) and medium-dense fine sand (EGU-3, deformation modulus 22 MPa).
3. Groundwater was encountered at a depth of 0.66–0.70 m, with seasonal fluctuations of up to 1 m; during rainfall and snowmelt, perched water may form at the top of the sandy clays. The site is naturally waterlogged, which is accounted for in the dam design.
4. Soils and groundwater are non-aggressive to concrete and reinforcement; corrosivity to steel is low.
5. Standard frost penetration depth is 1.07 m for loams and 1.31 m for sands; loam EGU-2 is highly frost-susceptible. No karst hazard — Stability Category VI.

Scope of work

• 1:500 engineering topographic plan for a 0.5 ha plot, contour interval 0.5 m
• survey control: 2 temporary control points from MOBTI base stations, MSK-50 coordinate system, Baltic height system
• survey of underground and aboveground utilities with approval of utility completeness with operating organisations
• registration of materials in the Moscow Region ISOGD

Results

1. Site elevations are 143–145 m AOD, and 143.67 and 143.71 m at the borehole collars.
2. A gas pipeline, overhead power line, high-voltage cable and telecommunications cable are plotted on the plan; the completeness of the utilities has been agreed with their owners.
3. The technical report was registered in the ISOGD of the Moscow Region on 23.06.2025 (GBU MO Mosoblgeotrest).

Scope of work

• 8 topsoil and subsoil samples to a depth of 3 m: heavy metals, petroleum hydrocarbons, benzo(a)pyrene; 2 microbiological and 2 parasitological samples
• reconnaissance gamma survey of the plot, gamma dose rate measurement at 6 control points, 8 soil samples for specific activity of radionuclides
• stream water and bottom sediment sample
• interpretation of satellite imagery, enquiries to regulatory authorities, schematic map of environmental conditions, and map of zones with special conditions for land use (ZOUIT)

Results

1. Soils and ground down to 3 m fall into the 'permissible' contamination category and may be used without restriction; benzo(a)pyrene and petroleum hydrocarbons are within limits.
2. The radiation environment is normal: uniform gamma background, no anomalies, and soils belong to Class I construction materials.
3. Stream water showed exceedances for BOD5, lead and manganese against fishery standards; bottom sediments fall into the 'permissible' category.
4. The site lies entirely within the water protection zone of the Setun River and the Meleyevsky Brook — these restrictions are shown on the ZOUIT (zones with special conditions for territory use) map.

Scope of work

• reconnaissance of watercourses and catchments — 1 km route, survey of morphological cross-sections along the Meleyevsky Brook and the Setun River — 0.15 km
• climatic summary from Novo-Iyerusalim, Naro-Fominsk and Mozhaysk weather stations
• calculation of maximum spring flood and rain flood discharges, minimum low-water discharges and peak water levels at design cross-sections of the Meleevsky Brook and Setun River
• characteristics of the ice regime and channel deformations

Results

1. Meleyevsky Brook at the dam cross-section: 1% AEP maximum discharge is 6.60 m³/s, highest water level accounting for backwater from the Setun River is 143.90 m BS.
2. Setun River at the brook mouth: 1% maximum discharge is 58.1 m³/s, highest spring ice-run water level is 144.00 m BS; maximum ice thickness is 62 cm.
3. Climatic sub-region IIB, temperature of the coldest five-day period −28 °C; snow region III (1.5 kPa), wind region I (0.23 kPa), ice region II.
4. An annual inspection of the brook and river channels approaching the dam and clearance of woody debris accumulations are recommended to the owner.