diff --git a/CHANGELOG.md b/CHANGELOG.md
index f20ec7759f39d926ccb67d0f9c324bf10cc2b838..80bf44ed074aa70f775e4c10114163adfaf01d8c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
## [Unreleased](https://github.com/usgs/waterdataui/compare/waterdataui-0.39.0...master)
+### Added
+- Instantaneous Values data availability information page
## [0.39.0](https://github.com/usgs/waterdataui/compare/waterdataui-0.38.0...waterdataui-0.39.0) - 2020-12-09
### Added
diff --git a/assets/src/styles/main.scss b/assets/src/styles/main.scss
index 386fc046772fb69884f58d468b69b550e3334daf..0c24009dcd52d445f850ac708c897775dd0cbf04 100644
--- a/assets/src/styles/main.scss
+++ b/assets/src/styles/main.scss
@@ -12,6 +12,8 @@ $fa-font-path: './fonts' !default;
@import './partials/social-share';
@import './partials/tooltip';
+@import './pages/iv-data-availability-statement';
+
.wdfn-component {
&[data-component='hydrograph'] {
@import './components/hydrograph/app';
diff --git a/assets/src/styles/pages/_iv-data-availability-statement.scss b/assets/src/styles/pages/_iv-data-availability-statement.scss
new file mode 100644
index 0000000000000000000000000000000000000000..9cfe314f9d06a0caad483d7bbdb00c52f74f28f1
--- /dev/null
+++ b/assets/src/styles/pages/_iv-data-availability-statement.scss
@@ -0,0 +1,9 @@
+
+#iv-data-availability-statement {
+ section {
+ @include u-padding-bottom(1);
+ }
+ .iv-statement-subsection {
+ @include u-padding-left(2);
+ }
+}
diff --git a/wdfn-server/waterdata/templates/iv_data_availability_statement.html b/wdfn-server/waterdata/templates/iv_data_availability_statement.html
new file mode 100644
index 0000000000000000000000000000000000000000..9fc48912713635e5a0737a48c0209f09882ccfe3
--- /dev/null
+++ b/wdfn-server/waterdata/templates/iv_data_availability_statement.html
@@ -0,0 +1,60 @@
+{% extends "base.html" %}
+
+{% block content %}
+ <div id="iv-data-availability-statement" class="usa-prose">
+ <h1>Current and Historical<br>Instantaneous Data Availability</h1>
+ <section class="usa-prose">
+ <p>
+ The available parameters from the Current Conditions and Historical Observations pages on the National
+ Water Information System Web Interface have two categories of instantaneous data availability.
+ For some parameters, historical data are available as far back as October 1, 1950, whereas for
+ others only the most recent 120 days of provisional data are available. The period of
+ availability depends on the intended use of the data and can vary from monitoring location to
+ monitoring location and/or between parameters at a monitoring location as described below.
+ </p>
+ </section>
+ <section class="usa-prose iv-statement-subsection">
+ <h2>Available Historical Instantaneous Data:</h2>
+ <p>
+ Parameters with historical instantaneous data are measured by the USGS Water Science Center (WSC)
+ with the intent to publish and are subject to a thorough review and approval process. Typically,
+ these data have corresponding historical daily values available for the period of record.
+ These instantaneous data are limited to data collected since October 1, 1950.
+ </p>
+ <p>
+ Data are presented as approved or
+ <a href="{{ url_for('provisional_data_statement')}}">PROVISIONAL</a>
+ as appropriate, however provisional data will be provided for only the most recent three years.
+ In cases where data are not approved within a three year period,
+ interested users should contact the local WSC for further information.
+ </p>
+ <h2>Available Operational Instantaneous Data:</h2>
+ <p>
+ These parameters typically are collected by the USGS for the purposes of supporting short-term
+ operational needs of the data network (for example precipitation at some locations) or parameters
+ measured to facilitate the computation of another parameter of interest (for example, stage is
+ used in the computations of streamflow). In either case, these parameters are not necessarily
+ corrected for errors or omissions either because the short-term need for the operational data
+ has passed or because other methods were used to estimate the primary parameter of interest.
+ Operational instantaneous data typically are not intended for publication and therefore are
+ limited to the most recent 120 days.
+ </p>
+ </section>
+ <section class="usa-prose">
+ <p>
+ Please note that the above designations are not uniformly applied from monitoring location to
+ monitoring location for a given parameter. For example, whereas stage data at some monitoring
+ locations are fully quality assured, published, and are historically available, at other monitoring
+ locations they are not quality assured and will only be available for 120 days. The same monitoring
+ location-to-monitoring location variations will exist for precipitation and other parameters
+ depending on the intended uses of the data.
+ </p>
+ <p>
+ Significant gaps in the availability of historical instantaneous data may exist due to instrument
+ problems, environmental conditions or other factors that affect the ability to collect data.
+ For some parameters, especially streamflow and others that are routinely estimated as
+ necessary, a complete record may be available as Daily Data.
+ </p>
+ </section>
+ </div>
+{% endblock content %}
diff --git a/wdfn-server/waterdata/tests/test_views.py b/wdfn-server/waterdata/tests/test_views.py
index 5bb93ae57996ab162e7423d3f5352f80532b0235..30d0ed091c22da595afb5fce1ad506b8c677b5fc 100644
--- a/wdfn-server/waterdata/tests/test_views.py
+++ b/wdfn-server/waterdata/tests/test_views.py
@@ -30,12 +30,22 @@ class TestProvisionalDataStatementView(TestCase):
def setUp(self):
self.app_client = app.test_client()
- def test_version(self):
+ def test_successful_view(self):
response = self.app_client.get('/provisional-data-statement')
self.assertEqual(response.status_code, 200)
+class TestIvDataAvailabilityStatementView(TestCase):
+ def setUp(self):
+ self.app_client = app.test_client()
+
+ def test_successful_view(self):
+ response = self.app_client.get('/iv-data-availability-statement')
+
+ self.assertEqual(response.status_code, 200)
+
+
class TestMonitoringLocationView(TestCase):
# pylint: disable=R0902
diff --git a/wdfn-server/waterdata/views.py b/wdfn-server/waterdata/views.py
index 505f58cc0164c8f61141acaf2320096476bc1d47..3ca4aedf271a9bd2ef10d1a56c165c6a2e645b8e 100644
--- a/wdfn-server/waterdata/views.py
+++ b/wdfn-server/waterdata/views.py
@@ -33,10 +33,11 @@ def provisional_data_statement():
"""Render the provisional data statement page."""
return render_template('provisional_data_statement.html')
+
@app.route('/iv-data-availability-statement')
def iv_data_availability():
"""Render the IV data availability statement page."""
- return "Not yet implemented"
+ return render_template('iv_data_availability_statement.html')
@app.route('/monitoring-location/<site_no>/', methods=['GET'])