Document a land subsidence benchmark disk in Katy, site 1, public right of way, Katy, TX 77493 (2026-07-30)

Katy has documented up to about 14 inches of land subsidence since 2007 at a Harris-Galveston Subsidence District GPS monitoring station, driven by groundwater withdrawal, and the National Geodetic Survey benchmark disks this kind of monitoring depends on often have no current public photo record. Standard: US EPA Rapid Bioassessment Protocols plus Harris-Galveston Subsidence District and USGS land-subsidence monitoring practice, applied here to a National Geodetic Survey benchmark disk network in Katy, TX, a documented Houston-area land-subsidence zone. SDG 6.3 and 11.b. Proof: document only stand off photo log plus disk identifier and condition note plus GPS plus ranked follow on note Method (US EPA Rapid Bioassessment Protocols plus Harris-Galveston Subsidence District and USGS land-subsidence monitoring practice, applied here to a National Geodetic Survey benchmark disk network in Katy, TX, a documented Houston-area land-subsidence zone. SDG 6.3 and 11.b.): 1. 1. From a public sidewalk or park path in Katy, locate a National Geodetic Survey benchmark disk set into the sidewalk, curb, or a park pavilion foundation, without disturbing the monument. 2. 2. Photograph the disk's stamped identifier and its setting (sidewalk, curb, or foundation) from directly above without touching or cleaning it. 3. 3. Note the disk's general condition (legible, worn, or partly covered) and its exact public location. 4. 4. Record a ranked follow on note naming the disk's location for the Harris-Galveston Subsidence District's monitoring record and for the groundwater-recharge install below. Done when: document only stand off photo log plus disk identifier and condition note plus GPS plus ranked follow on note

Where

public right of way, Katy, TX 77493

Pay

$90 proposed

This packet is not funded yet, so this figure is a proposed price and not money waiting in escrow. If a buyer funds it, approved proof settles that price onchain. If nobody funds it, approved proof earns provable credit toward the work instead of cash. You see which before you claim, never after.

Proof

document only stand off photo log plus disk identifier and condition note plus GPS plus ranked follow on note

This is exactly what gets it approved. Nothing settles without it.

Level

entry

Open until

2026-08-29

How this work is done

A documented method, so this packet comes out the same whoever does it. Typically 30–60 minutes. Method of record: EPA dry-weather / AMD field screening

Bring

• GPS phone
• pH meter or strips
• conductivity meter
• ammonia + iron test kit as specified
• surfactant screen if specified
• gloves
• camera

Steps

1. 1. Navigate to the outfall/reach; record GPS; photograph it, capturing any visible flow or staining.
2. 2. Note whether flow is present in dry weather (yes/no).
3. 3. Measure and record pH, conductivity, and each specified analyte per kit instructions.
4. 4. Log any color, odor, floc, or aquatic-life observation.
5. 5. Enter all readings with units, GPS, time, and photos into the proof record; sign.

If it does not match the plan

• Dry-weather flow present with elevated conductivity/ammonia/surfactants -> flag suspected illicit discharge for the responsible agency.
• pH < 6 with visible iron floc -> tag suspected acid mine drainage; recommend metals lab panel.

What counts as done

• pH + conductivity recorded with units
• Each specified analyte recorded with a value
• Dry-weather flow present? recorded yes/no
• GPS waypoint + timestamped photo

Proof is measured against these, not judged by taste.