Mason - Incorporated
(Community Scale, All Risk Indicators Report)
June 2026
Cumulative Flood Risk Score
57.5% ModerateRanks 121st of 284 communities in the state
- 2 of 27 risk indicators among the top 10% communities.
- 8 of 27 risk indicators among the top 20% communities.
Noteworthy Flood Risk Facts for Mason - Incorporated
Table 1. Noteworthy Flood Risk Facts: A Cumulative Flood Risk Index of 27 flood factors reveals that Mason - Incorporated ranks 121st of 284 communities in the state with a Cumulative Flood Risk Score of 57.5%. Below are all 27 flood risk indicators used in the risk index. Click on the More Info link for rationale and recommendations of each indicator.
| Risk Indicator | Description | More Info |
Supplementary External Links |
|---|---|---|---|
| Floodplain Area | 100 acres of high-risk floodplain. | Click for more information. | |
| Floodplain Area Ratio | 26.7% of total community area lies within the Special Flood Hazard Area. | Click for more information. | Floodplain Area Ratio by Incorporated Place Floodplain Area Ratio Risk Indicator Report |
| Floodplain Length | 0.5 miles of high-risk floodplain. | Click for more information. | |
| Floodplain Length Ratio | 0.00134 miles/acre of floodplain length in miles to total community area. | Click for more information. | Floodplain Length Ratio by Incorporated Place |
| Flood Declared Disasters | 14 flood declared disasters since 1953. | Click for more information. | |
| Flood Depth Median | 4.2 feet median base flood depth. | Click for more information. | Median Flood Depth by Incorporated Place (FEMA 1% Flood) Median Flood Depth by Incorporated Place (FEMA 1% Flood) Percent Rank Classification |
| Building Floodplain Count | 104 buildings in a high-risk flood zone. | Click for more information. | Building Count in SFHA by Incorporated Place Building Count in SFHA by Incorporated Place(Percent Rank) |
| Building Floodway Count | 12 buildings in the regulatory floodway or main river channel. | Click for more information. | Floodway Building Ratio by Incorporated Place |
| Building Floodplain Ratio | 16.7% of floodplain buildings to total buildings. | Click for more information. | Floodplain Building Ratio by Incorporated Place |
| Building Density | 1.04 buildings/acre density in floodplain. | Click for more information. | Building Density in SFHA by Incorporated Community |
| Building Median Value | $25,000 median building value in floodplain. | Click for more information. | |
| Bldg. Mobile Homes Ratio | 49.0% of single-family dwellings in floodplain are manufactured homes. | Click for more information. | |
| Bldg. Subgrade Basements Ratio | 20.9% of floodplain buildings have subgrade basements. | Click for more information. | |
| Building 1-Story Ratio | 93.0% of floodplain buildings have only one story. | Click for more information. | |
| Bldg. Year Pre-FIRM Ratio | 66.1% of floodplain buildings are Pre-FIRM or built with no FIRM in effect. | Click for more information. | Building Year Pre-FIRM Ratio by Incorporated Place Building Year Pre-FIRM Ratio by Incorporated Place (Percent Rank) |
| Bldg. Year Minus Rated Post-FIRM Ratio | 20.2% of floodplain buildings are Post-FIRM with lowest floor below BFE. | Click for more information. | Building Year Post-FIRM Minus-Rated Building Ratio by Incorporated Place Building Year Post-FIRM Minus-Rated Building Ratio by Incorporated Place (Percent Rank) |
| Essential Facilities | 0 essential facilities in moderate and high risk floodplains. | Click for more information. | |
| Roads Inundated Ratio | 21.3% of roads flooded by a 1% annual chance (100-yr) major flood. | Click for more information. | Roads Inundated Ratio for 1% Flood by Incorporated Place |
| Community Assets Historical | 0 historical assets in floodplain. | Click for more information. | |
| Community Assets Non-Historical | 1 non-historical assets in floodplain. | Click for more information. | |
| Bldg. Substantial Damage Count | 19 bldgs. substantially damaged by a 1% annual chance (100-yr) flood. | Click for more information. | |
| Bldg. Substantial Damage Ratio | 18.3% of buildings in floodplain substantially damaged by major storm. | Click for more information. | |
| Bldg. Previous Damage Claims | 1 buildings have prior damage claims. | Click for more information. | |
| Bldg. Repetitive Loss Structures | 0 repetitive loss structures. | Click for more information. | |
| Population in Floodplain Ratio | 26.6% of the population resides in a high-risk flood zone. | Click for more information. | |
| Population Displaced Ratio | 25.3% of population displaced by a 1% annual chance (100-yr) flood event. | Click for more information. | |
| WV Social Vulnerability Index | 70.0% index score of WV Social Vulnerability. | Click for more information. | Social Vulnerability Index (SVI) by Incorporated Place (Percent Rank) |
| Cumulative Index | 57.5% cumulative risk index score. | Click for more information. |
Flood Risk Index Scores for Mason - Incorporated
Table 2. Flood Risk Index Scores: A Cumulative Flood Risk Index of 27 flood factors reveals that Mason - Incorporated ranks 121st of 284 communities in the state with a Cumulative Flood Risk Score of 57.5%. Below are all 27 flood risk indicators used in the risk index with the indicator scores and rankings.
| Category | Flood Risk Indicator | Value for Mason - Incorporated | Indicator Score (0 - 100%) |
Indicator Rating |
|---|---|---|---|---|
| Floodplain Characteristics | Floodplain Area Click for more information. | 100 Acres | 46.9% | Moderate |
| Floodplain Area Ratio Click for more information. | 26.7% | 85.8% | Very High | |
| Floodplain Length Click for more information. | 0.5 Miles | 7.0% | Very Low | |
| Floodplain Length Ratio Click for more information. | 0.00134 Miles/Acre | 22.2% | Relatively Low | |
| Flood Declared Disasters Click for more information. | 14 | 23.6% | Relatively Low | |
| Flood Depth Median Click for more information. | 4.2 Ft | 86.9% | Very High | |
| Floodplain Characteristics Index, 194th | 31.8% | Relatively Low | ||
| Building Exposure | Building Floodplain Count Click for more information. | 104 | 59.3% | Moderate |
| Building Floodway Count Click for more information. | 12 | 72.7% | Relatively High | |
| Building Floodplain Ratio Click for more information. | 16.7% | 73.4% | Relatively High | |
| Building Density Click for more information. | 1.04 /Acre | 76.6% | Relatively High | |
| Building Exposure Index, 54th | 81.2% | Very High | ||
| Building Characteristics | Building Median Value Click for more information. | $25,000 | 28.2% | Relatively Low |
| Bldg. Mobile Homes Ratio Click for more information. | 49.0% | 95.7% | VERY HIGH | |
| Bldg. Subgrade Basements Ratio Click for more information. | 20.9% | 51.5% | Moderate | |
| Building 1-Story Ratio Click for more information. | 93.0% | 89.7% | Very High | |
| Bldg. Year Pre-FIRM Ratio Click for more information. | 66.1% | 26.8% | Relatively Low | |
| Bldg. Year Minus Rated Post-FIRM Ratio Click for more information. | 20.2% | 96.8% | VERY HIGH | |
| Building Characteristics Index, 27th | 90.8% | VERY HIGH | ||
| Critical Infrastructure | Essential Facilities Click for more information. | 0 | 0.0% | Very Low |
| Roads Inundated Ratio Click for more information. | 21.3% | 85.1% | Very High | |
| Critical Infrastructure Index, 159th | 44.1% | Moderate | ||
| Community Assets | Community Assets Historical Click for more information. | 0 | 0.0% | Very Low |
| Community Assets Non-Historical Click for more information. | 1 | 21.2% | Relatively Low | |
| Community Assets Index, 174th | 20.8% | Relatively Low | ||
| Building Damage Loss | Bldg. Substantial Damage Count Click for more information. | 19 | 75.9% | Relatively High |
| Bldg. Substantial Damage Ratio Click for more information. | 18.3% | 89.3% | Very High | |
| Bldg. Previous Damage Claims Click for more information. | 1 | 10.9% | Very Low | |
| Bldg. Repetitive Loss Structures Click for more information. | 0 | 0.0% | Very Low | |
| Building Damage Loss Index, 139th | 51.2% | Moderate | ||
| People / Social Vulnerabilities | Population in Floodplain Ratio Click for more information. | 26.6% | 77.7% | Relatively High |
| Population Displaced Ratio Click for more information. | 25.3% | 85.1% | Very High | |
| WV Social Vulnerability Index Click for more information. | - | 70.0% | Relatively High | |
| People / Social Vulnerabilities Index, 49th | 83.0% | Very High | ||
| Risk Index | Cumulative Index Click for more information. | 57.5% | Moderate | |
Risk Index Legend
Flood Risk Indicators of Mason - Incorporated Compared to Other Communities
Table 3. Flood Risk Index Comparison: Flood risk indicator values for Mason - Incorporated compared to descriptive statistics of all communities.
| Category | Flood Risk Indicator | Value for Mason - Incorporated | Median Value | Mean Value | Min Value | Max Value | State Stats |
|---|---|---|---|---|---|---|---|
| Floodplain Characteristics | Floodplain Area Click for more information. | 100 Acres | 150 Acres | 2,195 Acres | 6 Acres | 26,373 Acres | 528,635 Acres |
| Floodplain Area Ratio Click for more information. | 26.7% | 12.0% | 14.9% | 1.0% | 79.4% | 3.4% | |
| Floodplain Length Click for more information. | 0.5 Miles | 4.5 Miles | 72.4 Miles | 0.2 Miles | 823.9 Miles | 17,205.1 Miles | |
| Floodplain Length Ratio Click for more information. | 0.00134 Miles/Acre | 0.0039 Miles/Acre | 0.00482 Miles/Acre | 0.00046 Miles/Acre | 0.02235 Miles/Acre | 0.00111 Miles/Acre | |
| Flood Declared Disasters Click for more information. | 14 | 17 | 17 | 9 | 28 | 64 | |
| Flood Depth Median Click for more information. | 4.2 Ft | 1.8 Ft | 2.4 Ft | 0.0 Ft | 26.4 Ft | 1.8 Ft | |
| Building Exposure | Building Floodplain Count Click for more information. | 104 | 94 | 343 | 11 | 7,950 | 82,408 |
| Building Floodway Count Click for more information. | 12 | 3 | 34 | 0 | 1,391 | 8,237 | |
| Building Floodplain Ratio Click for more information. | 16.7% | 9.9% | 13.6% | 0.2% | 63.1% | 7.4% | |
| Building Density Click for more information. | 1.04 /Acre | 0.56 /Acre | 0.75 /Acre | 0.02 /Acre | 4.53 /Acre | 0.16 /Acre | |
| Building Characteristics | Building Median Value Click for more information. | $25,000 | $41,145 | $46,533 | $12,800 | $213,800 | $38,200 |
| Bldg. Mobile Homes Ratio Click for more information. | 49.0% | 19.0% | 20.8% | 0.0% | 100.0% | 27.5% | |
| Bldg. Subgrade Basements Ratio Click for more information. | 20.9% | 23.6% | 27.0% | 0.0% | 90.3% | 24.8% | |
| Building 1-Story Ratio Click for more information. | 93.0% | 84.6% | 78.3% | 0.0% | 100.0% | 84.0% | |
| Bldg. Year Pre-FIRM Ratio Click for more information. | 66.1% | 83.6% | 80.5% | 5.9% | 100.0% | 77.5% | |
| Bldg. Year Minus Rated Post-FIRM Ratio Click for more information. | 20.2% | 3.4% | 5.3% | 0.0% | 39.9% | 5.8% | |
| Critical Infrastructure | Essential Facilities Click for more information. | 0 | 1 | 2 | 0 | 23 | 489 |
| Roads Inundated Ratio Click for more information. | 21.3% | 9.8% | 13.6% | 0.0% | 66.7% | 6.7% | |
| Community Assets | Community Assets Historical Click for more information. | 0 | 0 | 11 | 0 | 1,259 | 2,758 |
| Community Assets Non-Historical Click for more information. | 1 | 3 | 9 | 0 | 149 | 2,092 | |
| Building Damage Loss | Bldg. Substantial Damage Count Click for more information. | 19 | 3 | 27 | 0 | 811 | 6,493 |
| Bldg. Substantial Damage Ratio Click for more information. | 18.3% | 2.8% | 6.9% | 0.0% | 77.4% | 7.9% | |
| Bldg. Previous Damage Claims Click for more information. | 1 | 34 | 116 | 0 | 2,873 | 27,882 | |
| Bldg. Repetitive Loss Structures Click for more information. | 0 | 8 | 40 | 0 | 1,574 | 9,698 | |
| People / Social Vulnerabilities | Population in Floodplain Ratio Click for more information. | 26.6% | 13.8% | 21.2% | 0.1% | 100.0% | 11.0% |
| Population Displaced Ratio Click for more information. | 25.3% | 7.4% | 14.2% | 0.0% | 100.0% | 6.6% | |
| WV Social Vulnerability Index Click for more information. | 70.0% | 53.1% | 52.4% | 0.0% | 100.0% | - | |
General Information Statistics for Mason - Incorporated
Table 4. General Information and comparison statistics for Mason - Incorporated.
| Total Area (ACRES) |
Total Structures | Total Population | Population Density (/SQ MILE) |
Number of Households | Average Household Size | |
|---|---|---|---|---|---|---|
| Mason - Incorporated | 374 | 621 | 793 | 1,357.0 | 384 | 2.1 |
| STATE STATS | 15,500,454 | 1,118,761 | 1,801,049 | 74.4 | 711,352 | 2.5 |
| COMMUNITIES STATS: | ||||||
| Median | 774 | 738 | 1,369 | 878.1 | 548 | 2.5 |
| Mean | 54,579 | 3,939 | 6,342 | 1,011.7 | 2,505 | 2.6 |
| Minimum | 34 (Sylvester - Inc) |
28 (Thurmond - Inc) |
4 (Thurmond - Inc) |
6.7 (Pocahontas Uninc) |
4 (Thurmond - Inc) |
1.0 (Thurmond - Inc) |
| Maximum | 661,204 (Randolph Uninc) |
49,661 (Berkeley Uninc) |
101,650 (Berkeley Uninc) |
3,895.7 (Windsor Heights - Inc) |
39,255 (Berkeley Uninc) |
4.7 (Pullman - Inc) |
Risk Indicator data last updated August 2024
