tanjil vol2 ch4b - 4b - General Construction Activities

Oct 3, 2026

General Construction Activities are described through terrain-grouping and map units for the Tanjil area. The text lists multiple terrain types across north and south directions, including Devonian sediments and metamorphics, Tertiary sediments, Tertiary volcanics, drainage channels and watercourses, and alluvial terraces and drainage flats near the lower reaches of the Tanjil River. Each terrain group and map unit is assigned a rating from 1 to 5 using five capability classes, ranging from very high capability with no limitations to very poor capability with very severe limitations.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages16

Reading Time40 min

AccessFree to download

4b. General Construction Activities

Terrain groups, map units, and ratings

Capability classes (Class 1-5)

4b. General Construction Activities | Terrain Group | Map Unit | Rating | Terrain Group | Map Unit | Rating | Terrain Group | Map Unit | Rating | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Steep to hilly terrain on Devonian sediments to the north. | CR1
CR1a
SS1a
SS2a
SS3a
SS4a | 3
2
5
4
3
3 | Hilly to undulating terrain on Tertiary sediments to the south. | CR3
CR4
SS1c
SS2c
SS3c
SS4c | 3
2
5
4
2
2 | Drainage channel and watercourses throughout hilly terrain. | DC1
DC2 | 5
4 | | | | | | | | Alluvial Terraces associated with lower reaches of the Tanjil River. | TR1
TR1 | 3
2 | | Hilly to undulating terrain associated with Tertiary volcanics throughout area. | CR2
CR2b
SS1b
SS2b
SS3b | 2
3
5
3
2 | Hilly to undulating terrain Devonian metamorphics to the north. | CR5
SS1d
SS2d
SS3d | 5
4
4
3 | Drainage flats associated with lower reaches of Tanjil River. | DF1
DF2 | 5
4 | Class 1 Very high capability No limitations Class 2 High capability Slight limitations Class 3 Fair capability Moderate limitations Class 4 Poor capability Severe limitations Class 5 Very poor capability Very severe limitations | Terrain Group | Map Unit | Rating | Terrain Group | Map Unit | Rating | Terrain Group | Map Unit | Rating | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Steep to hilly terrain on Devonian sediments to the north. | CR1
CR1a
SS1a
SS2a
SS3a
SS4a | 3
2
5
4
3
3 | Hilly to undulating terrain on Tertiary sediments to the south. | CR3
CR4
SS1c
SS2c
SS3c
SS4c | 3
2
5
4
2
2 | Drainage channel and watercourses throughout hilly terrain. | DC1
DC2 | 5
4 | | | | | | | | Alluvial Terraces associated with lower reaches of the Tanjil River. | TR1
TR1 | 3
2 | | Hilly to undulating terrain associated with Tertiary volcanics throughout area. | CR2
CR2b
SS1b
SS2b
SS3b | 2
3
5
3
2 | Hilly to undulating terrain Devonian metamorphics to the north. | CR5
SS1d
SS2d
SS3d | 5
4
4
3 | Drainage flats associated with lower reaches of Tanjil River. | DF1
DF2 | 5
4 | Class 1 Very high capability No limitations Class 2 High capability Slight limitations Class 3 Fair capability Moderate limitations Class 4 Poor capability Severe limitations Class 5 Very poor capability Very severe limitations | Terrain Group | Map Unit | Rating | Terrain Group | Map Unit | Rating | Terrain Group | Map Unit | Rating | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Steep to hilly terrain on Devonian sediments to the north. | CR1
CR1a
SS1a
SS2a
SS3a
SS4a | 3
2
5
4
3
3 | Hilly to undulating terrain on Tertiary sediments to the south. | CR3
CR4
SS1c
SS2c
SS3c
SS4c | 3
2
5
4
2
2 | Drainage channel and watercourses throughout hilly terrain. | DC1
DC2 | 5
4 | | | | | | | | Alluvial Terraces associated with lower reaches of the Tanjil River. | TR1
TR1 | 3
2 | | Hilly to undulating terrain associated with Tertiary volcanics throughout area. | CR2
CR2b
SS1b
SS2b
SS3b | 2
3
5
3
2 | Hilly to undulating terrain Devonian metamorphics to the north. | CR5
SS1d
SS2d
SS3d | 5
4
4
3 | Drainage flats associated with lower reaches of Tanjil River. | DF1
DF2 | 5
4 | Class 1 Very high capability No limitations Class 2 High capability Slight limitations Class 3 Fair capability Moderate limitations Class 4 Poor capability Severe limitations Class 5 Very poor capability Very severe limitations | Terrain Group | Map Unit | Rating | Terrain Group | Map Unit | Rating | Terrain Group | Map Unit | Rating | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Steep to hilly terrain on Devonian sediments to the north. | CR1
CR1a

FAQs

What terrain factors are considered in the General Construction Activities section?

The section considers multiple terrain groups such as Devonian sediments and metamorphics, Tertiary sediments and volcanics, drainage channels and watercourses, plus alluvial terraces and drainage flats near the lower reaches of the Tanjil River.

How are map units and terrain groups organized in the table?

Each terrain description is split into one or more map units (e.g., CR, SS, DC, TR, DF codes), and each map unit is given a numeric rating.

What do Class 1 to Class 5 mean in this document?

Class 1 indicates very high capability with no limitations, while Class 5 indicates very poor capability with very severe limitations. Intermediate classes represent progressively lower capability and greater limitations.

Oct 3, 2026

Upload by BigDaveOnline