Attachment- 52 Hydrology Map.pdf
PDF 512 KB Posted
- Solicitation number
- 36C77624B0007_1
About this file
The document is an Attachment - 52 Hydrology Map related to a federal contract opportunity. The map shows the hydrologic soil groups for Fannin County, Texas, which are classified into four groups (A, B, C, and D) based on their runoff potential. The majority of the area of interest is composed of Normangee clay loam (46.6%) and Wilson silt loam (53.4%), both of which are classified as Hydrologic Soil Group C/D.
The related federal contract opportunity is Solicitation Number 36C77624B0007_1, titled "Z2DA--EHRM Bonham, TX Construction 549A4-21-700 EHRM Construction (VA-23-00092679)". This is an Invitation for Bid issued by the Department of Veterans Affairs Technology Acquisition Center Austin for a general contractor to provide infrastructure improvements at the Bonham VAMC, including upgrading facility fiber, designing a new data center, remodeling TR rooms, and upgrading HVAC and electrical distribution. The solicitation is a total Service-Disabled Veteran-Owned Small Business (SDVOSB) Set-Aside, with a NAICS code of 236220 and a size standard of $45 million. The period of performance is approximately 365 calendar days from the issuance of the Notice to Proceed, and the Magnitude of Construction is expected to be between $10,000,000.00 and $20,000,000.00.
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Text version
Hydrologic Soil Group—Fannin County, Texas
Natural Resources Conservation Service
Web Soil Survey National Cooperative Soil Survey
3/26/2024
762600 762700 762800 762900 763000 763100 763200 763300 763400 763500 763600 763700
762600 762700 762800 762900 763000 763100 763200 763300 763400 763500 763600 763700
33° 35' 16'' N
0'
6' ' W
33° 35' 16'' N
' 2 8'
' W
33° 34' 50'' N
0'
6' ' W
33° 34' 50'' N
' 2 8'
' W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 14N WGS84 0 250 500 1000 1500
Feet 0 50 100 200 300
Meters Map Scale: 1:5,650 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI) Area of Interest (AOI)
Soils Soil Rating Polygons
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Lines A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Points A
A/D
B
B/D
C
C/D
D
Not rated or not available
Water Features Streams and Canals
Transportation Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background Aerial Photography
The soil surveys that comprise your AOI were mapped at 1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale.
Please rely on the bar scale on each map sheet for map measurements.
Source of Map: Natural Resources Conservation Service Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as of the version date(s) listed below.
Soil Survey Area: Fannin County, Texas Survey Area Data: Version 20, Sep 5, 2023
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.
Date(s) aerial images were photographed: Jan 22, 2022—Jan 25, 2022
The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident.
Hydrologic Soil Group—Fannin County, Texas
Natural Resources Conservation Service
Web Soil Survey National Cooperative Soil Survey
3/26/2024
Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
NoC2 Normangee clay loam, 2 to 5 percent slopes, eroded
C 49.5 46.6%
WzA Wilson silt loam, 0 to 1 percent slopes
C/D 56.7 53.4%
Totals for Area of Interest 106.2 100.0%
Description
Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture.
These soils have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes.
Hydrologic Soil Group—Fannin County, Texas
Natural Resources Conservation Service
Web Soil Survey National Cooperative Soil Survey
Rating Options
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Higher
Hydrologic Soil Group—Fannin County, Texas
Natural Resources Conservation Service
Web Soil Survey National Cooperative Soil Survey
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