The Vigil Network
Cañada de la Cueva Headcut: Summary of Erosion Pin Data (1970 - 1975)

Data Files:

Summary of data for erosion pins placed in wall of Cañada de la Cueva headcut, 1970-1975. (ft = 0.3048 m)

Number of Pin (First placed on Aug. 19, 1970)	Net Erosion Measured in 1971 (feet)			Net Erosion Measured in 1972 (feet)		Net Erosion Measured in 1974 (feet)		Net Erosion Measured in 1975 (feet)
Number of Pin (First placed on Aug. 19, 1970)	June 24	July 26	July 27	Aug. 17	Sept. 12	May 14	Aug. 13	Dec. 30
1	⁽¹⁾>0.4	⁽⁴⁾1	0.04	⁽⁹⁾2	0.33	⁽¹³⁾1	0.00	⁽¹⁸⁾0.7
2	0.30	⁽⁵⁾>0.4	⁽⁶⁾4	⁽⁹⁾6	⁽¹¹⁾2	2.43	0.00	0.72
3	⁽²⁾1	⁽⁵⁾>0.4	⁽⁷⁾7	⁽⁹⁾8	⁽¹¹⁾8	⁽¹⁴⁾14	0.00	1.97
4	⁽¹⁾>0.4	⁽⁵⁾>0.4	⁽⁶⁾11	⁽⁹⁾11	⁽¹¹⁾16	⁽¹⁴⁾6	0.00	0.92
5	0.07	0.25	0.33	0.43	0.33	0.03	0.00	0.07
6	⁽¹⁾>0.4	0.09	⁽⁶⁾2	⁽⁹⁾2	0.26	⁽¹⁵⁾>0.4	0.00	0.03
7	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
8	0.21	⁽⁵⁾>0.4	0.12	⁽¹⁰⁾2	0.20	⁽¹⁶⁾>0.4	0.00	0.20
9	0.00	0.11	0.05	0.00	⁽¹²⁾2	0.00	0.00	0.00
10	⁽³⁾--	0.09	⁽⁸⁾0.00	⁽¹⁰⁾1	0.23	⁽¹⁷⁾2	0.00	0.07

⁽¹⁾ Pin destroyed; erosion since Aug. 19, 1970 estimated; pin replaced in headwall.
⁽²⁾ Pin destroyed; erosion since Aug. 19, 1970 measured by planetable survey on June 25, 1971; pin replaced in headwall.
⁽³⁾ Pin first placed on June 25, 1971.
⁽⁴⁾ Pin destroyed; erosion since Aug. 19, 1970, including amount measured on July 26, 1971, measured by planetable survey on Aug. 2, 1971; pin replaced in headwall.
⁽⁵⁾ Pin destroyed; erosion since June 24, 1971, estimated; pin replaced in headwall.
⁽⁶⁾ Pin destroyed; erosion since Aug. 19, 1970, measured by planetable survey on Aug. 2, 1971; pin replaced in headwall.
⁽⁷⁾ Pin destroyed; erosion since June 25, 1971, measured by planetable survey on Aug. 2, 1971; pin replaced in headwall.
⁽⁸⁾ No erosion at pin, but water spilled at this place during storm of July 26, 1971.
⁽⁹⁾ Pin destroyed; erosion since Aug. 2, 1971, measured by planetable survey on Aug. 20, 1972; pin replaced in headwall.
⁽¹⁰⁾ Pin destroyed; erosion since Aug. 19, 1970, measured by planetable survey on Aug. 20, 1972; pin replaced in headwall.
⁽¹¹⁾ Pin destroyed; erosion since Aug. 20, 1972, measured by planetable survey on Sept. 12, 1972; pin replaced with steel rod 3.3 feet (1 m) long.
⁽¹²⁾ Pin destroyed; erosion since Aug. 19, 1970, measured by planetable survey on Sept. 12, 1972; pin replaced in headwall.
⁽¹³⁾ Pin destroyed; erosion since Aug. 20, 1972, measured by planetable survey on May 14, 1974; pin found in slumped earth below headcut; pin replaced in headwall.
⁽¹⁴⁾ Steed rod destroyed; erosion since Sept. 12, 1972, measured by planetable survey on May 14, 1974; rod replaced in headwall.
⁽¹⁵⁾ Pin destroyed; erosion since Sept. 12, 1972, estimated; pin found in slumped earth below headcut; pin replaced in headwall.
⁽¹⁶⁾ Pin destroyed; erosion since Sept. 12, 1972, estimated; pin replaced in headwall.
⁽¹⁷⁾ Pin destroyed; erosion since Aug. 20, 1972, measured by planetable survey on May 14, 1974; pin replaced with steel rod 3.3 feet (1 m) long.
⁽¹⁸⁾ Pin destroyed; erosion since Aug. 13, 1974, estimated; pin found below headcut; pin replaced in headwall.

Return to top of page

The Vigil Network Cañada de la Cueva Headcut: Summary of Erosion Pin Data (1970 - 1975)

The Vigil Network
Cañada de la Cueva Headcut: Summary of Erosion Pin Data (1970 - 1975)